Hi guys,
I bought a 4.6 stroker from Chad Golen for my 95er YJ, installed 24lb injectors and 62mm TB he recommends together wih a pace setter header with 2.5 exhaust on the other end. Installed DUI kit for 50 kV ignition together with RC9CY4 spark plugs opened to 0.055. Put a wideband O2 on the header end. Running 4.1 axles with 33" BFG. Gas is at 98 octane here. Chad told me stock PCM and intake is fine for this setup.
I wonder what is proper AFR to gain maximum power? When in WOT my AFR goes down from 12.5 @ 3000 rpm down to 10.8 @ 4500 rpm - seems to be way to rich. The dyno chart Chad gave me shows 13.4 AFR @ 5000 rpm where the engine delivers max. power of 270 HP.
I newer had a Jeep stroker before so I wonder what might be a proper AFR range here: should I try to tune for AFR 13 with my APEXI? Do I have to tune the ignition too?
Any helpful suggestion is welcome.
br Frank
Best AFR for 4.6 golen engine?
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Best AFR for 4.6 golen engine?
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
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Cheromaniac
- I live here
- Posts: 3184
- Joined: March 8th, 2008, 12:58 pm
- Stroker Displacement: 4563cc
- Vehicle Year: 1992
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Cyprus
- Contact:
Re: Best AFR for 4.6 golen engine?
You mentioned 98 octane fuel so I guess that's RON, equivalent to 93 US.
The ideal AFR for maximum power on a N/A engine at WOT is 12.5-13.0:1, so adjust your fuel curve accordingly. As for ignition timing advance, you can adjust that too if the APEXI allows it. For maximum power, advance until you hear a light ping and then back off a couple of degrees.
The ideal AFR for maximum power on a N/A engine at WOT is 12.5-13.0:1, so adjust your fuel curve accordingly. As for ignition timing advance, you can adjust that too if the APEXI allows it. For maximum power, advance until you hear a light ping and then back off a couple of degrees.
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Re: Best AFR for 4.6 golen engine?
Thanks for fast reply - 12.5 to 13 was the range I had expected for a naturally aspirated engine. And yes, you're right: 98 in Germany is same as 93 in US. Because the engine has a high compression I think it is a good idea to go with it.
Unfortunately I cannot tune the ignition by APEXI, but I've red about guys who modified the CPS. Any idea or experience about the range of advancing it, so I can calculate the width of the holes for moving/adjusting the sensor?
Unfortunately I cannot tune the ignition by APEXI, but I've red about guys who modified the CPS. Any idea or experience about the range of advancing it, so I can calculate the width of the holes for moving/adjusting the sensor?
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
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jsawduste
- My keyboard is getting warn out
- Posts: 1032
- Joined: February 28th, 2008, 3:13 am
- Stroker Displacement: 4.9
- Location: Michigan
Re: Best AFR for 4.6 golen engine?
There are several ways to move the CS towards the passenger side. Slotting, adding an additional plate and moving the sensor itself on the plate or even a combination.
IIRC 3/8-7/16`s works out to be ~ 4 degrees.
IIRC 3/8-7/16`s works out to be ~ 4 degrees.
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Re: Best AFR for 4.6 golen engine?
Yesterday I did a test run on the highway and managed to log the AFR and rpm together with some other data. Looks like the PCM dramatically raises fuel injection time from 4000 rpm on (my current fuel consumption in the table is calculated from injection time). Also AFR is to rich. It does not rev past 4500 rpm and even this 4500 rpm does sound like ignition timing, plugs ??? preventing the motor from reving up towards 5000 rpm. Any hints and/or suggestions?
Code: Select all
TIMESTAMP RPM SPEED(km/h) m/h AFR2 LAMBDA2 Curr. FC(l/100km Curr.mpg
2020-05-17_22:09:07.40 3600 135 84 13,33 0,91 12,8 18,4
2020-05-17_22:09:07.60 3600 135 84 13,4 0,91 12,8 18,4
2020-05-17_22:09:07.80 3600 135 84 13,58 0,92 12,8 18,4
2020-05-17_22:09:08.00 3600 135 84 13,39 0,91 12,8 18,4
2020-05-17_22:09:08.20 3600 136 84 13,28 0,9 12,8 18,4
2020-05-17_22:09:08.40 3700 135 84 15,46 1,05 12,8 18,4
2020-05-17_22:09:08.60 3700 135 84 15,51 1,06 12,8 18,4
2020-05-17_22:09:08.80 3700 135 84 14,96 1,02 12,8 18,4
2020-05-17_22:09:09.00 3700 135 84 14,21 0,97 12,8 18,4
2020-05-17_22:09:09.20 3700 135 84 13,78 0,94 12,8 18,4
2020-05-17_22:09:09.40 3700 136 84 14,06 0,96 27,5 8,5
2020-05-17_22:09:09.60 3700 136 84 14,12 0,96 27,5 8,5
2020-05-17_22:09:09.80 3700 136 84 14,01 0,95 27,5 8,5
2020-05-17_22:09:10.00 3700 136 84 13,93 0,95 27,5 8,5
2020-05-17_22:09:10.20 3700 136 84 13,86 0,94 27,5 8,5
2020-05-17_22:09:10.40 3700 135 84 13,66 0,93 27,5 8,5
2020-05-17_22:09:10.60 3700 135 84 13,84 0,94 27,5 8,5
2020-05-17_22:09:10.80 3700 135 84 13,66 0,93 27,5 8,5
2020-05-17_22:09:11.00 3700 135 84 13,81 0,94 27,5 8,5
2020-05-17_22:09:11.20 3700 135 84 13,67 0,93 27,5 8,5
2020-05-17_22:09:11.40 3700 135 84 13,79 0,94 24 9,8
2020-05-17_22:09:11.60 3700 135 84 13,84 0,94 24 9,8
2020-05-17_22:09:11.80 3700 135 84 13,73 0,93 24 9,8
2020-05-17_22:09:12.00 3700 135 84 13,81 0,94 24 9,8
2020-05-17_22:09:12.20 3700 135 84 13,88 0,94 24 9,8
2020-05-17_22:09:12.40 3600 135 84 13,68 0,93 24 9,8
2020-05-17_22:09:12.60 3600 135 84 13,87 0,94 24 9,8
2020-05-17_22:09:12.80 3600 135 84 13,66 0,93 24 9,8
2020-05-17_22:09:13.00 3600 136 84 13,61 0,93 24 9,8
2020-05-17_22:09:13.20 3600 136 84 13,74 0,93 24 9,8
2020-05-17_22:09:13.40 3700 136 84 13,89 0,94 24,7 9,5
2020-05-17_22:09:13.60 3700 136 84 13,72 0,93 24,7 9,5
2020-05-17_22:09:13.80 3700 135 84 13,71 0,93 24,7 9,5
2020-05-17_22:09:14.00 3700 135 84 13,98 0,95 24,7 9,5
2020-05-17_22:09:14.20 3700 135 84 13,81 0,94 24,7 9,5
2020-05-17_22:09:14.40 3700 135 84 13,72 0,93 24,7 9,5
2020-05-17_22:09:14.60 3700 135 84 13,71 0,93 24,7 9,5
2020-05-17_22:09:14.80 3700 136 84 13,76 0,94 24,7 9,5
2020-05-17_22:09:15.00 3700 136 84 13,91 0,95 24,7 9,5
2020-05-17_22:09:15.20 3700 136 84 13,62 0,93 24,7 9,5
2020-05-17_22:09:15.40 3700 135 84 13,81 0,94 24,4 9,6
2020-05-17_22:09:15.60 3700 135 84 13,8 0,94 24,4 9,6
2020-05-17_22:09:15.80 3700 135 84 13,88 0,94 24,4 9,6
2020-05-17_22:09:16.00 3700 135 84 13,82 0,94 24,4 9,6
2020-05-17_22:09:16.20 3700 136 84 13,58 0,92 24,4 9,6
2020-05-17_22:09:16.40 3700 137 85 13,74 0,93 24,4 9,6
2020-05-17_22:09:16.60 3700 136 84 13,78 0,94 24,4 9,6
2020-05-17_22:09:16.80 3700 136 84 13,76 0,94 24,4 9,6
2020-05-17_22:09:17.00 3700 136 84 13,67 0,93 24,4 9,6
2020-05-17_22:09:17.20 3700 136 84 13,86 0,94 24,4 9,6
2020-05-17_22:09:17.40 3700 136 84 13,8 0,94 24,4 9,6
2020-05-17_22:09:17.60 3700 137 85 13,84 0,94 24,4 9,6
2020-05-17_22:09:17.80 3700 137 85 13,76 0,94 24,4 9,6
2020-05-17_22:09:18.00 3700 136 84 13,81 0,94 24,4 9,6
2020-05-17_22:09:18.20 3700 136 84 13,75 0,94 24,4 9,6
2020-05-17_22:09:18.40 3700 136 84 13,48 0,92 24,4 9,6
2020-05-17_22:09:18.60 3700 136 84 14,89 1,01 24,4 9,6
2020-05-17_22:09:18.80 3700 136 84 13,26 0,9 24,4 9,6
2020-05-17_22:09:19.00 3700 137 85 13,17 0,9 24,4 9,6
2020-05-17_22:09:19.20 3700 137 85 13,22 0,9 24,4 9,6
2020-05-17_22:09:19.40 3800 138 86 13,3 0,9 24,7 9,5
2020-05-17_22:09:19.60 3800 139 86 13,75 0,94 24,7 9,5
2020-05-17_22:09:20.00 3800 139 86 12,6 0,86 24,7 9,5
2020-05-17_22:09:20.20 3800 140 87 12,36 0,84 24,7 9,5
2020-05-17_22:09:20.40 3800 140 87 12,35 0,84 24,7 9,5
2020-05-17_22:09:20.60 3800 141 88 12,18 0,83 24,7 9,5
2020-05-17_22:09:20.80 3800 142 88 12,16 0,83 24,7 9,5
2020-05-17_22:09:21.00 3800 142 88 12,06 0,82 24,7 9,5
2020-05-17_22:09:21.20 3800 142 88 12,04 0,82 24,7 9,5
2020-05-17_22:09:21.40 3800 143 89 11,93 0,81 24,7 9,5
2020-05-17_22:09:21.60 3800 144 89 11,95 0,81 36,9 6,4
2020-05-17_22:09:21.80 3800 144 89 12,06 0,82 36,9 6,4
2020-05-17_22:09:22.00 3800 145 90 11,9 0,81 36,9 6,4
2020-05-17_22:09:22.20 3800 145 90 11,95 0,81 36,9 6,4
2020-05-17_22:09:22.40 3800 147 91 11,92 0,81 36,9 6,4
2020-05-17_22:09:22.60 4000 147 91 11,93 0,81 36,9 6,4
2020-05-17_22:09:22.80 4000 147 91 11,95 0,81 36,9 6,4
2020-05-17_22:09:23.00 4000 148 92 11,89 0,81 36,9 6,4
2020-05-17_22:09:23.20 4000 149 93 11,77 0,8 36,9 6,4
2020-05-17_22:09:23.40 4000 149 93 11,86 0,81 36,9 6,4
2020-05-17_22:09:23.60 4000 150 93 11,87 0,81 43,6 5,4
2020-05-17_22:09:23.80 4000 150 93 11,88 0,81 43,6 5,4
2020-05-17_22:09:24.00 4000 150 93 11,94 0,81 43,6 5,4
2020-05-17_22:09:24.20 4000 151 94 11,85 0,81 43,6 5,4
2020-05-17_22:09:24.40 4000 152 94 11,96 0,81 43,6 5,4
2020-05-17_22:09:24.60 4000 152 94 11,88 0,81 43,6 5,4
2020-05-17_22:09:24.80 4000 153 95 11,92 0,81 43,6 5,4
2020-05-17_22:09:25.00 4000 154 96 11,99 0,82 43,6 5,4
2020-05-17_22:09:25.20 4000 154 96 11,84 0,81 43,6 5,4
2020-05-17_22:09:25.40 4000 155 96 11,86 0,81 43,6 5,4
2020-05-17_22:09:25.60 4300 155 96 11,84 0,81 44,4 5,3
2020-05-17_22:09:25.80 4300 155 96 11,98 0,81 44,4 5,3
2020-05-17_22:09:26.00 4300 156 97 11,99 0,82 44,4 5,3
2020-05-17_22:09:26.20 4300 156 97 11,91 0,81 44,4 5,3
2020-05-17_22:09:26.40 4300 157 97 11,94 0,81 44,4 5,3
2020-05-17_22:09:26.60 4200 158 98 11,91 0,81 44,4 5,3
2020-05-17_22:09:26.80 4200 158 98 12 0,82 44,4 5,3
2020-05-17_22:09:27.00 4200 158 98 11,94 0,81 44,4 5,3
2020-05-17_22:09:27.20 4200 159 99 12 0,82 44,4 5,3
2020-05-17_22:09:27.40 4200 158 98 11,91 0,81 44,4 5,3
2020-05-17_22:09:27.60 4400 159 99 11,98 0,81 44,5 5,3
2020-05-17_22:09:27.80 4400 159 99 11,91 0,81 44,5 5,3
2020-05-17_22:09:28.00 4400 160 99 11,94 0,81 44,5 5,3
2020-05-17_22:09:28.20 4400 160 99 12,02 0,82 44,5 5,3
2020-05-17_22:09:28.40 4400 161 100 11,72 0,8 44,5 5,3
2020-05-17_22:09:28.60 4300 161 100 11,87 0,81 44,5 5,3
2020-05-17_22:09:28.80 4300 162 101 11,9 0,81 44,5 5,3
2020-05-17_22:09:29.00 4300 162 101 11,85 0,81 44,5 5,3
2020-05-17_22:09:29.20 4300 162 101 11,97 0,81 44,5 5,3
2020-05-17_22:09:29.40 4300 162 101 11,9 0,81 44,5 5,3
2020-05-17_22:09:29.60 4400 162 101 11,93 0,81 44,3 5,3
2020-05-17_22:09:29.80 4400 162 101 11,8 0,8 44,3 5,3
2020-05-17_22:09:30.00 4400 163 101 11,87 0,81 44,3 5,3
2020-05-17_22:09:30.20 4400 163 101 11,82 0,8 44,3 5,3
2020-05-17_22:09:30.40 4400 163 101 11,82 0,8 44,3 5,3
2020-05-17_22:09:30.60 4400 163 101 11,77 0,8 44,3 5,3
2020-05-17_22:09:30.80 4400 164 102 11,72 0,8 44,3 5,3
2020-05-17_22:09:31.00 4400 163 101 11,8 0,8 44,3 5,3
2020-05-17_22:09:31.20 4400 164 102 11,9 0,81 44,3 5,3
2020-05-17_22:09:31.40 4400 164 102 11,8 0,8 44,3 5,3
2020-05-17_22:09:31.60 4400 163 101 11,73 0,8 44,1 5,3
2020-05-17_22:09:31.80 4400 163 101 11,81 0,8 44,1 5,3
2020-05-17_22:09:32.00 4400 164 102 11,75 0,8 44,1 5,3
2020-05-17_22:09:32.20 4400 164 102 11,74 0,8 44,1 5,3
2020-05-17_22:09:32.40 4400 165 102 11,75 0,8 44,1 5,3
2020-05-17_22:09:32.60 4500 165 102 11,73 0,8 44,1 5,3
2020-05-17_22:09:32.80 4500 165 102 11,8 0,8 44,1 5,3
2020-05-17_22:09:33.00 4500 165 102 11,76 0,8 44,1 5,3
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
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Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
I recently got a hpt tuners and I noticed on my 97 wrangler it does in fact increase the injector timing significantly including the power enrichment at the higher wot rpm range. The timing also backs off at those rpm levels. What exact injectors do you have?
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Re: Best AFR for 4.6 golen engine?
I installed 4 hole injectors (BOSCH 0280155931, 24 lb) that came with the Golen 4.6 stroker kit. fuel pressure is 38 psi @ WOT. TB is 62 mm.
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
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Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
0-280-155-931
28.55 pounds
300 cc
215.8 grams
43.5 psi
3 bar
Those are 28.5 pound injectors at 43.5 psi. Haven't built my stroker yet but all the info ive accrued for my build is 24# @43.5psi injector are the biggest I need naturally asperated.
28.55 pounds
300 cc
215.8 grams
43.5 psi
3 bar
Those are 28.5 pound injectors at 43.5 psi. Haven't built my stroker yet but all the info ive accrued for my build is 24# @43.5psi injector are the biggest I need naturally asperated.
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jsawduste
- My keyboard is getting warn out
- Posts: 1032
- Joined: February 28th, 2008, 3:13 am
- Stroker Displacement: 4.9
- Location: Michigan
Re: Best AFR for 4.6 golen engine?
Don't forget the ECM goes back into open loop at ~72-75% throttle. There is where the sudden fuel dump is happening.
You should also be able to see the fuel trim delays at lower RPM before enrichment starts.
I run Accel 24`s at 42 psi with the trim delay set to 0 and the trim itself pulled back.
You should also be able to see the fuel trim delays at lower RPM before enrichment starts.
I run Accel 24`s at 42 psi with the trim delay set to 0 and the trim itself pulled back.
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Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
Using the calculator you are at 26.6 pounds at 38 psi im at 25.5 psi at 49 psi.
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Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
Its too rich imo at anything below 12:1 for naturally asperated. 12.5: would be ideal. do you have a way of taking some fuel out above 3800? have you done the cps mod to advance the base timing? Im thinking those injectors are a bit too big.FrankKoba wrote: ↑May 19th, 2020, 5:01 am Yesterday I did a test run on the highway and managed to log the AFR and rpm together with some other data. Looks like the PCM dramatically raises fuel injection time from 4000 rpm on (my current fuel consumption in the table is calculated from injection time). Also AFR is to rich. It does not rev past 4500 rpm and even this 4500 rpm does sound like ignition timing, plugs ??? preventing the motor from reving up towards 5000 rpm. Any hints and/or suggestions?
Code: Select all
TIMESTAMP RPM SPEED(km/h) m/h AFR2 LAMBDA2 Curr. FC(l/100km Curr.mpg 2020-05-17_22:09:07.40 3600 135 84 13,33 0,91 12,8 18,4 2020-05-17_22:09:07.60 3600 135 84 13,4 0,91 12,8 18,4 2020-05-17_22:09:07.80 3600 135 84 13,58 0,92 12,8 18,4 2020-05-17_22:09:08.00 3600 135 84 13,39 0,91 12,8 18,4 2020-05-17_22:09:08.20 3600 136 84 13,28 0,9 12,8 18,4 2020-05-17_22:09:08.40 3700 135 84 15,46 1,05 12,8 18,4 2020-05-17_22:09:08.60 3700 135 84 15,51 1,06 12,8 18,4 2020-05-17_22:09:08.80 3700 135 84 14,96 1,02 12,8 18,4 2020-05-17_22:09:09.00 3700 135 84 14,21 0,97 12,8 18,4 2020-05-17_22:09:09.20 3700 135 84 13,78 0,94 12,8 18,4 2020-05-17_22:09:09.40 3700 136 84 14,06 0,96 27,5 8,5 2020-05-17_22:09:09.60 3700 136 84 14,12 0,96 27,5 8,5 2020-05-17_22:09:09.80 3700 136 84 14,01 0,95 27,5 8,5 2020-05-17_22:09:10.00 3700 136 84 13,93 0,95 27,5 8,5 2020-05-17_22:09:10.20 3700 136 84 13,86 0,94 27,5 8,5 2020-05-17_22:09:10.40 3700 135 84 13,66 0,93 27,5 8,5 2020-05-17_22:09:10.60 3700 135 84 13,84 0,94 27,5 8,5 2020-05-17_22:09:10.80 3700 135 84 13,66 0,93 27,5 8,5 2020-05-17_22:09:11.00 3700 135 84 13,81 0,94 27,5 8,5 2020-05-17_22:09:11.20 3700 135 84 13,67 0,93 27,5 8,5 2020-05-17_22:09:11.40 3700 135 84 13,79 0,94 24 9,8 2020-05-17_22:09:11.60 3700 135 84 13,84 0,94 24 9,8 2020-05-17_22:09:11.80 3700 135 84 13,73 0,93 24 9,8 2020-05-17_22:09:12.00 3700 135 84 13,81 0,94 24 9,8 2020-05-17_22:09:12.20 3700 135 84 13,88 0,94 24 9,8 2020-05-17_22:09:12.40 3600 135 84 13,68 0,93 24 9,8 2020-05-17_22:09:12.60 3600 135 84 13,87 0,94 24 9,8 2020-05-17_22:09:12.80 3600 135 84 13,66 0,93 24 9,8 2020-05-17_22:09:13.00 3600 136 84 13,61 0,93 24 9,8 2020-05-17_22:09:13.20 3600 136 84 13,74 0,93 24 9,8 2020-05-17_22:09:13.40 3700 136 84 13,89 0,94 24,7 9,5 2020-05-17_22:09:13.60 3700 136 84 13,72 0,93 24,7 9,5 2020-05-17_22:09:13.80 3700 135 84 13,71 0,93 24,7 9,5 2020-05-17_22:09:14.00 3700 135 84 13,98 0,95 24,7 9,5 2020-05-17_22:09:14.20 3700 135 84 13,81 0,94 24,7 9,5 2020-05-17_22:09:14.40 3700 135 84 13,72 0,93 24,7 9,5 2020-05-17_22:09:14.60 3700 135 84 13,71 0,93 24,7 9,5 2020-05-17_22:09:14.80 3700 136 84 13,76 0,94 24,7 9,5 2020-05-17_22:09:15.00 3700 136 84 13,91 0,95 24,7 9,5 2020-05-17_22:09:15.20 3700 136 84 13,62 0,93 24,7 9,5 2020-05-17_22:09:15.40 3700 135 84 13,81 0,94 24,4 9,6 2020-05-17_22:09:15.60 3700 135 84 13,8 0,94 24,4 9,6 2020-05-17_22:09:15.80 3700 135 84 13,88 0,94 24,4 9,6 2020-05-17_22:09:16.00 3700 135 84 13,82 0,94 24,4 9,6 2020-05-17_22:09:16.20 3700 136 84 13,58 0,92 24,4 9,6 2020-05-17_22:09:16.40 3700 137 85 13,74 0,93 24,4 9,6 2020-05-17_22:09:16.60 3700 136 84 13,78 0,94 24,4 9,6 2020-05-17_22:09:16.80 3700 136 84 13,76 0,94 24,4 9,6 2020-05-17_22:09:17.00 3700 136 84 13,67 0,93 24,4 9,6 2020-05-17_22:09:17.20 3700 136 84 13,86 0,94 24,4 9,6 2020-05-17_22:09:17.40 3700 136 84 13,8 0,94 24,4 9,6 2020-05-17_22:09:17.60 3700 137 85 13,84 0,94 24,4 9,6 2020-05-17_22:09:17.80 3700 137 85 13,76 0,94 24,4 9,6 2020-05-17_22:09:18.00 3700 136 84 13,81 0,94 24,4 9,6 2020-05-17_22:09:18.20 3700 136 84 13,75 0,94 24,4 9,6 2020-05-17_22:09:18.40 3700 136 84 13,48 0,92 24,4 9,6 2020-05-17_22:09:18.60 3700 136 84 14,89 1,01 24,4 9,6 2020-05-17_22:09:18.80 3700 136 84 13,26 0,9 24,4 9,6 2020-05-17_22:09:19.00 3700 137 85 13,17 0,9 24,4 9,6 2020-05-17_22:09:19.20 3700 137 85 13,22 0,9 24,4 9,6 2020-05-17_22:09:19.40 3800 138 86 13,3 0,9 24,7 9,5 2020-05-17_22:09:19.60 3800 139 86 13,75 0,94 24,7 9,5 2020-05-17_22:09:20.00 3800 139 86 12,6 0,86 24,7 9,5 2020-05-17_22:09:20.20 3800 140 87 12,36 0,84 24,7 9,5 2020-05-17_22:09:20.40 3800 140 87 12,35 0,84 24,7 9,5 2020-05-17_22:09:20.60 3800 141 88 12,18 0,83 24,7 9,5 2020-05-17_22:09:20.80 3800 142 88 12,16 0,83 24,7 9,5 2020-05-17_22:09:21.00 3800 142 88 12,06 0,82 24,7 9,5 2020-05-17_22:09:21.20 3800 142 88 12,04 0,82 24,7 9,5 2020-05-17_22:09:21.40 3800 143 89 11,93 0,81 24,7 9,5 2020-05-17_22:09:21.60 3800 144 89 11,95 0,81 36,9 6,4 2020-05-17_22:09:21.80 3800 144 89 12,06 0,82 36,9 6,4 2020-05-17_22:09:22.00 3800 145 90 11,9 0,81 36,9 6,4 2020-05-17_22:09:22.20 3800 145 90 11,95 0,81 36,9 6,4 2020-05-17_22:09:22.40 3800 147 91 11,92 0,81 36,9 6,4 2020-05-17_22:09:22.60 4000 147 91 11,93 0,81 36,9 6,4 2020-05-17_22:09:22.80 4000 147 91 11,95 0,81 36,9 6,4 2020-05-17_22:09:23.00 4000 148 92 11,89 0,81 36,9 6,4 2020-05-17_22:09:23.20 4000 149 93 11,77 0,8 36,9 6,4 2020-05-17_22:09:23.40 4000 149 93 11,86 0,81 36,9 6,4 2020-05-17_22:09:23.60 4000 150 93 11,87 0,81 43,6 5,4 2020-05-17_22:09:23.80 4000 150 93 11,88 0,81 43,6 5,4 2020-05-17_22:09:24.00 4000 150 93 11,94 0,81 43,6 5,4 2020-05-17_22:09:24.20 4000 151 94 11,85 0,81 43,6 5,4 2020-05-17_22:09:24.40 4000 152 94 11,96 0,81 43,6 5,4 2020-05-17_22:09:24.60 4000 152 94 11,88 0,81 43,6 5,4 2020-05-17_22:09:24.80 4000 153 95 11,92 0,81 43,6 5,4 2020-05-17_22:09:25.00 4000 154 96 11,99 0,82 43,6 5,4 2020-05-17_22:09:25.20 4000 154 96 11,84 0,81 43,6 5,4 2020-05-17_22:09:25.40 4000 155 96 11,86 0,81 43,6 5,4 2020-05-17_22:09:25.60 4300 155 96 11,84 0,81 44,4 5,3 2020-05-17_22:09:25.80 4300 155 96 11,98 0,81 44,4 5,3 2020-05-17_22:09:26.00 4300 156 97 11,99 0,82 44,4 5,3 2020-05-17_22:09:26.20 4300 156 97 11,91 0,81 44,4 5,3 2020-05-17_22:09:26.40 4300 157 97 11,94 0,81 44,4 5,3 2020-05-17_22:09:26.60 4200 158 98 11,91 0,81 44,4 5,3 2020-05-17_22:09:26.80 4200 158 98 12 0,82 44,4 5,3 2020-05-17_22:09:27.00 4200 158 98 11,94 0,81 44,4 5,3 2020-05-17_22:09:27.20 4200 159 99 12 0,82 44,4 5,3 2020-05-17_22:09:27.40 4200 158 98 11,91 0,81 44,4 5,3 2020-05-17_22:09:27.60 4400 159 99 11,98 0,81 44,5 5,3 2020-05-17_22:09:27.80 4400 159 99 11,91 0,81 44,5 5,3 2020-05-17_22:09:28.00 4400 160 99 11,94 0,81 44,5 5,3 2020-05-17_22:09:28.20 4400 160 99 12,02 0,82 44,5 5,3 2020-05-17_22:09:28.40 4400 161 100 11,72 0,8 44,5 5,3 2020-05-17_22:09:28.60 4300 161 100 11,87 0,81 44,5 5,3 2020-05-17_22:09:28.80 4300 162 101 11,9 0,81 44,5 5,3 2020-05-17_22:09:29.00 4300 162 101 11,85 0,81 44,5 5,3 2020-05-17_22:09:29.20 4300 162 101 11,97 0,81 44,5 5,3 2020-05-17_22:09:29.40 4300 162 101 11,9 0,81 44,5 5,3 2020-05-17_22:09:29.60 4400 162 101 11,93 0,81 44,3 5,3 2020-05-17_22:09:29.80 4400 162 101 11,8 0,8 44,3 5,3 2020-05-17_22:09:30.00 4400 163 101 11,87 0,81 44,3 5,3 2020-05-17_22:09:30.20 4400 163 101 11,82 0,8 44,3 5,3 2020-05-17_22:09:30.40 4400 163 101 11,82 0,8 44,3 5,3 2020-05-17_22:09:30.60 4400 163 101 11,77 0,8 44,3 5,3 2020-05-17_22:09:30.80 4400 164 102 11,72 0,8 44,3 5,3 2020-05-17_22:09:31.00 4400 163 101 11,8 0,8 44,3 5,3 2020-05-17_22:09:31.20 4400 164 102 11,9 0,81 44,3 5,3 2020-05-17_22:09:31.40 4400 164 102 11,8 0,8 44,3 5,3 2020-05-17_22:09:31.60 4400 163 101 11,73 0,8 44,1 5,3 2020-05-17_22:09:31.80 4400 163 101 11,81 0,8 44,1 5,3 2020-05-17_22:09:32.00 4400 164 102 11,75 0,8 44,1 5,3 2020-05-17_22:09:32.20 4400 164 102 11,74 0,8 44,1 5,3 2020-05-17_22:09:32.40 4400 165 102 11,75 0,8 44,1 5,3 2020-05-17_22:09:32.60 4500 165 102 11,73 0,8 44,1 5,3 2020-05-17_22:09:32.80 4500 165 102 11,8 0,8 44,1 5,3 2020-05-17_22:09:33.00 4500 165 102 11,76 0,8 44,1 5,3
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Re: Best AFR for 4.6 golen engine?
The Golen engine kit stated 24 lb for the injectors, but from the BOSCH spec sheet I think you are right and I would assume 26.6 lb is way to much for this engine and the 62mm TB. I wonder why Chad Golen recommends such big injectors for his stroker. My PCM is ODB1 so the only chance I have is manipulating the MAP signal using my APEXI - I will give it another try tomorrow and report the outcome.
Btw: any recommendation where to start for cps advancing?
Btw: any recommendation where to start for cps advancing?
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
-
Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
Did Chad sell those injectors to you? The specs ive found says they are not 24# injectors for sure. Imo id swap them out or throw a turbo on it as rich as it is lol. If he sold them to you let him know how rich it is maybe he give you another set. As far as cps mod do a search on this forum it will come up.Btw id close the spark plug gaps and run about .035 gap could be why it wont pull past 4500. Too much gap and the spark wont jump the gap under high load. experienced that in my drag race days. lean it out and it should pull to 5000. leaner is meaner.
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FrankKoba
- Posts: 8
- Joined: December 21st, 2012, 8:22 am
- Stroker Displacement: 4.6
- Vehicle Year: 1995
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
- Location: Germany
Re: Best AFR for 4.6 golen engine?
Yes, Chad put these injectors togeter with the 62 mm TB in the engine box.
I followed your recommendation and gapped the RC9YC4 from 0.055 (as recommended by the D.U.I. documentation) to about 0.04 and managed the fuel trim to go much leaner using the APEXI SAFC2. Here are the results:
It is way better performance (test run was on slightly ascending highway) and the feeling at the high rpms was not perfect but much much better. I will narrow the gap a bit more and try again. I will also test NGK ZFR7F-11 which should be as cold as RC9YC4 but has longer elektrodes.
@Tolemar: Thanks a lot for this "enlightenment".
I followed your recommendation and gapped the RC9YC4 from 0.055 (as recommended by the D.U.I. documentation) to about 0.04 and managed the fuel trim to go much leaner using the APEXI SAFC2. Here are the results:
Code: Select all
RPM SPEED AFR2 LAMBDA2 TEMP. CUR.FC.
4300 160 13,29 0,90 21,1 39,1
4300 161 13,39 0,91 21,1 39,1
4300 160 13,47 0,92 21,1 39,1
4300 161 13,41 0,91 21,1 39,1
4300 161 13,35 0,91 21,1 39,1
4400 161 13,34 0,91 21,1 39
4400 161 13,3 0,90 21,1 39
4400 162 13,29 0,90 21,1 39
4400 162 13,42 0,91 21,1 39
4400 161 13,33 0,91 21,1 39
4400 162 13,41 0,91 21,1 39
4400 162 13,33 0,91 21,1 39
4400 162 13,34 0,91 21,1 39
4400 162 13,29 0,90 21,1 39
4400 162 13,33 0,91 21,1 39
4400 162 13,29 0,90 21,1 38,7
4400 163 13,36 0,91 21,1 38,7
4400 163 13,29 0,90 21,1 38,7
4400 163 13,26 0,90 21,1 38,7
4400 163 13,29 0,90 21,1 38,7
4400 163 13,3 0,90 21,1 38,7
4400 163 13,31 0,91 21,1 38,7
4400 164 13,34 0,91 21,1 38,7
4400 163 13,36 0,91 21,1 38,7
4400 164 13,3 0,90 21,1 38,7
4400 164 13,27 0,90 21,1 38,9
4400 164 13,28 0,90 21,1 38,9
4400 164 13,31 0,91 21,1 38,9
4400 165 13,34 0,91 21,1 38,9
4400 165 13,26 0,90 21,1 38,9
4400 165 13,23 0,90 21,1 38,9
4400 165 13,28 0,90 21,1 38,9
4400 165 13,22 0,90 21,1 38,9
4400 165 13,2 0,90 21,1 38,9
4400 165 13,14 0,89 21,1 38,9
4500 165 13,24 0,90 21,1 38,8
4500 165 13,27 0,90 21,1 38,8
4500 165 13,26 0,90 21,1 38,8
4500 166 13,24 0,90 21,1 38,8
4500 166 13,22 0,90 21,1 38,8
4500 166 13,26 0,90 21,1 38,8
4500 167 13,29 0,90 21,1 38,8
4500 167 13,17 0,90 21,1 38,8
4500 166 13,08 0,89 21,1 38,8
4500 167 13,25 0,90 21,1 38,8
4500 167 13,22 0,90 21,1 38,5
4500 167 13,13 0,89 21,1 38,5
4500 168 13,24 0,90 21,1 38,5
4500 168 13,28 0,90 21,1 38,5
4500 168 13,19 0,90 21,1 38,5
4600 167 13,25 0,90 21,1 38,5
4600 168 13,29 0,90 21,1 38,5
4600 167 13,31 0,91 21,1 38,5
4600 168 13,34 0,91 21,1 38,5
4600 168 13,25 0,90 21,1 38,5
4500 168 13,26 0,90 21,1 38,3
4500 168 13,36 0,91 21,1 38,3
4500 168 13,26 0,90 21,1 38,3
4500 168 13,29 0,90 21,1 38,3
4500 168 13,37 0,91 21,1 38,3
4500 168 13,31 0,91 21,1 38,3
4500 168 13,38 0,91 21,1 38,3
4500 168 13,29 0,90 21,1 38,3
4500 169 13,42 0,91 21,1 38,3
4500 169 13,31 0,91 21,1 38,3
4500 169 13,23 0,90 21,1 38
4500 169 13,38 0,91 21,1 38
4500 170 13,24 0,90 21,1 38
4500 169 13,37 0,91 21,1 38
4500 169 13,27 0,90 21,1 38
4600 170 13,36 0,91 21,1 38
4600 170 13,39 0,91 21,1 38
4600 170 13,42 0,91 21,1 38
4600 170 13,36 0,91 21,1 38
4600 170 13,29 0,90 21,1 38
4500 170 13,38 0,91 21,1 37,7
4500 170 13,33 0,91 21,1 37,7
4500 171 13,29 0,90 21,1 37,7
4500 170 13,37 0,91 21,1 37,7
4500 171 13,37 0,91 21,1 37,7
4600 171 13,35 0,91 21,1 37,7
4600 171 13,34 0,91 21,1 37,7
4600 171 13,28 0,90 21,1 37,7
4600 171 13,47 0,92 21,1 37,7
4600 171 13,41 0,91 21,1 37,7
4600 171 13,34 0,91 21,1 37,8
4600 172 13,38 0,91 21,1 37,8
4600 172 13,39 0,91 21,1 37,8
4600 173 13,4 0,91 21,1 37,8
4600 173 13,34 0,91 21,1 37,8
4800 173 13,38 0,91 21,1 37,8
4800 173 13,47 0,92 21,1 37,8
4800 173 13,43 0,91 21,1 37,8
4800 173 13,29 0,90 21,1 37,8
4800 173 13,44 0,91 21,1 37,8
4600 174 13,36 0,91 21,1 37,4
4600 174 13,39 0,91 21,1 37,4
4600 173 13,42 0,91 21,1 37,4
4600 174 13,41 0,91 21,1 37,4
4600 175 13,39 0,91 21,1 37,4
4800 174 13,38 0,91 21,1 37,4
4800 175 13,28 0,90 21,1 37,4
4800 175 13,41 0,91 21,1 37,4
4800 175 13,41 0,91 21,1 37,4
4800 175 13,4 0,91 21,1 37,4
4800 175 13,39 0,91 21,1 37
4800 175 13,35 0,91 21,1 37
4800 175 13,38 0,91 21,1 37
4800 175 13,44 0,91 21,1 37
4800 175 13,42 0,91 21,1 37
4800 177 13,43 0,91 20,6 37
4800 176 13,45 0,91 20,6 37
4800 176 13,44 0,91 20,6 37
4800 177 13,34 0,91 20,6 37
4800 177 13,35 0,91 20,6 37
4800 176 13,47 0,92 20,6 36,5
4800 177 13,4 0,91 20,6 36,5
4800 178 13,41 0,91 20,6 36,5
4800 177 13,43 0,91 20,6 36,5
4800 178 13,41 0,91 20,6 36,5
4900 178 13,48 0,92 20,6 36,5
4900 178 13,33 0,91 20,6 36,5
4900 177 13,45 0,91 20,6 36,5
4900 178 13,41 0,91 20,6 36,5
4900 178 13,35 0,91 20,6 36,5
@Tolemar: Thanks a lot for this "enlightenment".
95 YJ, OME 2"+MX6, 33x12.5 BFG+Alcoa 10"x15", Golen 4.6, 62mm TB, CCV oil catch, 4.1 end gear, PS header in 2.5" SS exhaust, GC disc brake, eCooling, 50kV DUI ign., UTCOMP-PRO, LC1 w.band, APEXI SAFC2, LED lights, Pioneer SS, Recaros
-
Tolemar
- Making Progress
- Posts: 88
- Joined: October 28th, 2019, 4:55 pm
- Stroker Displacement: 4.6
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: Wrangler
Re: Best AFR for 4.6 golen engine?
Looks a bit lean id add a little back try and get the wot in the 12s especially in the higher rpm range 4000 and up. Yea general consenses on spark is wider gaps is better but in reality it is not. At higher rpm that coil is working harder(less time) to jump a further gap and ive seen my engine start to miss at the higher rpm levels even with a msd an high output coil. I closed the gap and the problem went away.
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