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Stroker injectors question

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razoraxis
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Stroker injectors question

Post by razoraxis » October 19th, 2016, 2:43 pm

On the stroker builds it lists different injectors for different years. How does this work? Do I match it based on the head I am using or the year of the jeep cause of the pcm?

Also with the cams on the modified poor mans stroker, does the block year matter or only what year cam I use? Can I use a 96 cam in an 89 block? Does an aftermarket cam further the hp gain? Thanks.

CandyCaneXj
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Re: Stroker injectors question

Post by CandyCaneXj » October 19th, 2016, 5:53 pm

You match injectors based on the wire connectors you have that plug in to the fuel injector unless you want to get different connectors and cut and splice to use whatever fuel injector you want. Also I dont know the year but fuel pressure is around 10lbs higher on maybe 96 and newer because the fuel pressure regulator is a 49 psi unit attached to the fuel pump instead of a 39 psi regulator with a return line on the older setups. Yes you can use a 96 cam in an 89 block. 1987-1998 blocks and cams interchange with each other. Besides the different valve springs factor. I think building a stroker using a stock cam is a complete waste of time and money personally. I would ratther run a 4.0 with a good cam than run a stroker with a stock cam. Read through people's build threads so many of them use a stock cam then they say how they wish the engine didn't top out at 4000 rpms lol.

razoraxis
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Re: Stroker injectors question

Post by razoraxis » October 19th, 2016, 5:57 pm

Thanks for the info. I am about to buy an 89 xj for a stroker donor block and I am wondering if thats the right block to go with or if I should look for something newer.

CandyCaneXj
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Re: Stroker injectors question

Post by CandyCaneXj » October 19th, 2016, 6:00 pm

To go in a 99 cherokee? That 1989 block is missing the engine bolt holes that the ignition coil bolts to that the 1991 and newer blocks have.

razoraxis
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Re: Stroker injectors question

Post by razoraxis » October 19th, 2016, 6:22 pm

Thanks for the help

06-Rubicon
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Re: Stroker injectors question

Post by 06-Rubicon » October 21st, 2016, 9:07 am

2005 and 2006 Wranglers have a different higher pressure fuel pump from earlier years, this is why LS1 injectors work well for those two years.

-Joe

jakewalter
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Re: Stroker injectors question

Post by jakewalter » October 26th, 2016, 2:26 pm

So what you guys use for injectors on a 2002 Wrangler with a mildly built 4.6?
I would like to run pump gas.
Thanks so much,
Jake
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Cheromaniac
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Re: Stroker injectors question

Post by Cheromaniac » October 26th, 2016, 10:05 pm

Maybe this will answer all your questions about which injectors to use on the most popular stroker builds:

4.6L Modified "poor man's" stroker

Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
Custom forged +0.020" bore pistons, compression height 1.380", dish volume 26cc
9.25:1 CR
Stock 4.0 camshaft
DIY ported HO 1.91"/1.50" 57cc cylinder head
Mopar/Victor 0.043" head gasket
0.043" quench height
Ford 24lb/hr injectors for '87-'95 engines, Bosch 0280155703 injectors for '96-'04 engines, '98 Chevy LS1 25.2lb/hr injectors for '05-'06 engines
249hp @ 4900rpm, 303lbft @ 3500rpm ('87-'95 camshaft)
245hp @ 4700rpm, 315lbft @ 3000rpm ('96-'04 camshaft)

4.6L low-buck stroker

Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
Custom forged +0.030" bore pistons, compression height 1.380", dish volume 18cc
9.6:1 CR
CompCams 68-231-4 206/214 degree camshaft
Russ Pottenger ported HO 2.00"/1.55" 62cc cylinder head
Mopar/Victor 0.043" head gasket
0.043" quench height
Ford 24lb/hr injectors with adjustable FPR or MAP adjuster for '87-'95 engines, Ford 24lb/hr injectors for '96-'04 engines, '99-'00 Chevy LS1 26.2lb/hr injectors for '05-'06 engines
268hp @ 4900rpm, 326lbft @ 3500rpm

4.7L medium-buck stroker

Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
Custom forged +0.060" bore pistons, compression height 1.380", dish volume 15cc
10.2:1 CR
CompCams 68-235-4 210/218 degree camshaft
Russ Pottenger ported Edelbrock 60cc aluminum cylinder head
Mopar/Victor 0.043" head gasket
0.043" quench height
Flometrics F&B 68mm billet TB
Accel 30lb/hr injectors for '87-'95 engines, Bosch 0280155784 injectors for '96-'04 engines, '01-'02 Chevy LS1/LS6 28.6lb/hr injectors for '05-'06 engines
290hp @ 5100rpm, 340lbft @ 3700rpm
1992 Jeep XJ 4.6 Stroker - 5MT - 202rwhp/258rwtq - Sold 13/12/2016 :cry:
Stroker build-up, Stroker "recipes"
2006 Ford Mustang GT - 5MT
- 310rwhp/328rwtq - Midlife crisis car :D

jakewalter
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Re: Stroker injectors question

Post by jakewalter » October 27th, 2016, 9:51 am

Thanks Cheromaniac for the information.
Has anyone used the newer Bosch Gen 3 injectors?
Thanks so much,
Jake
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Cannonball
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Re: Stroker injectors question

Post by Cannonball » January 30th, 2017, 2:08 pm

ok im confused.... I have been told to use 24# injectors..... doing a 2004 4.7 with the 42RLE auto trans and 5.13 gears on 35's....

mostly street driven and would like some retained fuel economy if possible. Need more input please....

I see here people are posting 28 - 30 #

I also dont want to have to splice in a new connector either... so can anyone help a little more?

Thank you

Cannonball

wldc10
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Re: Stroker injectors question

Post by wldc10 » February 7th, 2018, 3:30 pm

Cannonball wrote:ok im confused.... I have been told to use 24# injectors..... doing a 2004 4.7 with the 42RLE auto trans and 5.13 gears on 35's....

mostly street driven and would like some retained fuel economy if possible. Need more input please....

I see here people are posting 28 - 30 #

I also dont want to have to splice in a new connector either... so can anyone help a little more?

Thank you

Cannonball
Going by Cheromaniac's information (and what I've read elsewhere), you should probably be good with the "Bosch 0280155784 injectors for '96-'04 engines".

Saying "Ford 24lb" injectors is miss leading, as there are Ford injectors with 24lb flow at different fuel pressures. The equivalent "Ford 24lb" injectors for the Bosh '784 injectors appear to be these: https://www.fiveomotorsport.com/24lbs-j ... er-4.6-4.7. If my current Bosch '703 injectors ever need to be replaced, I'm going to try those in the link.

Russ Pottenger
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Re: Stroker injectors question

Post by Russ Pottenger » February 7th, 2018, 8:04 pm

Also keep in mind up to 98 EV1 connectors are used, 99 up uses EV6

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