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What is normal timing?
Posted: February 29th, 2020, 6:48 pm
by Sean295
On my 4.6 stroker with a .035 quench and an indexed dizzy I am getting 35 degrees advance while driving down the road. If I mash the gas it drops to around 19 degrees....Is that normal? Sounds low. I don't get any pinging and running 85 octane gas. Thinking I should grind out the CPS mount holes and advance the timing a couple degrees.
What should my next upgrade be? It has a cam, larger pistons, ported intake and exhaust but stock intake, throttle body and header, 24# injectors. Should I look for a larger throttle body?
Forgot to mention it is a 97 TJ...beleive that is OBD 1
Re: What is normal timing?
Posted: February 29th, 2020, 8:13 pm
by Brianj5600
It seems like your timing table is similar to mine. I saw the crazy conservative timing and bought Syked tuning software. It was the only software available at the time, but HPTuners is now available. IMO HPTuners is a much better choice.
This is stock and altered timing on my 2004 TJ 4.0L. Red shaded cells are cells with more advance than stock and blue cells are less advance than stock. It definitely helped putting timing in it. It will pull timing for high coolant or intake temperature. HPTuners allows control of the stock ECM.
Re: What is normal timing?
Posted: March 1st, 2020, 4:04 am
by SkylinesSuck
It's OBD2
Re: What is normal timing?
Posted: March 2nd, 2020, 6:00 pm
by Sammyguy
Im running hptuners software and would like to try these timing numbers. What are the other numbers other than the rpms?
Re: What is normal timing?
Posted: March 2nd, 2020, 6:08 pm
by Brianj5600
Torr, I have no idea why.
Re: What is normal timing?
Posted: March 2nd, 2020, 6:09 pm
by Brianj5600
Torr, I have no idea why.
Re: What is normal timing?
Posted: March 3rd, 2020, 7:21 pm
by Racer117
Sean295 wrote: ↑February 29th, 2020, 6:48 pm
On my 4.6 stroker with a .035 quench and an indexed dizzy I am getting 35 degrees advance while driving down the road. If I mash the gas it drops to around 19 degrees....Is that normal? Sounds low. I don't get any pinging and running 85 octane gas. Thinking I should grind out the CPS mount holes and advance the timing a couple degrees.
What should my next upgrade be? It has a cam, larger pistons, ported intake and exhaust but stock intake, throttle body and header, 24# injectors. Should I look for a larger throttle body?
Forgot to mention it is a 97 TJ...beleive that is OBD 1
To get that quench, did you have to deck the block? If so, how much?
Re: What is normal timing?
Posted: March 8th, 2020, 6:36 pm
by Sean295
Ill have to look but i think it was .040
It really depends on the pistons you install. This was how much I needed to remove to bring it up flush with the top of the block and my pistons are dished some. Then I installed a .035 gasket. I am told I could have gone lower...they say there is lots of room on the 4.0...the piston could go above the deck slightly if wanted.
Re: What is normal timing?
Posted: March 8th, 2020, 6:41 pm
by Sean295
So I ground the holes on the crank position sensor and slid the sensor towards the pass. side about 1/4"...seemed to help...I also installed colder plugs...Now if i stall out the motor I can start it right away without kickback...before i would have o wait a minute before i could start it again..
I built the Adjustable map sensor...set the voltage to 5.13v...If i turn it on i get a check engine light for high map sensor voltage...no way around that is there?
Re: What is normal timing?
Posted: March 9th, 2020, 7:20 am
by SkylinesSuck
Sean295 wrote: ↑March 8th, 2020, 6:41 pm
I built the Adjustable map sensor...set the voltage to 5.13v...If i turn it on i get a check engine light for high map sensor voltage...no way around that is there?
Tuning it. I mean, tuning the ecu itself, not piggy backing sensors to trick the ecu.