Stroker injectors question

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
Post Reply
razoraxis
Posts: 9
Joined: October 13th, 2016, 7:34 pm
Vehicle Year: 1999
Vehicle Make: Jeep
Vehicle Model: Cherokee

Stroker injectors question

Post by razoraxis »

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
Making Progress
Making Progress
Posts: 88
Joined: September 5th, 2013, 4:02 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Stroker injectors question

Post by CandyCaneXj »

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
Posts: 9
Joined: October 13th, 2016, 7:34 pm
Vehicle Year: 1999
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Stroker injectors question

Post by razoraxis »

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
Making Progress
Making Progress
Posts: 88
Joined: September 5th, 2013, 4:02 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Stroker injectors question

Post by CandyCaneXj »

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
Posts: 9
Joined: October 13th, 2016, 7:34 pm
Vehicle Year: 1999
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Stroker injectors question

Post by razoraxis »

Thanks for the help
06-Rubicon
Noob
Noob
Posts: 11
Joined: March 8th, 2016, 11:01 am
Stroker Displacement: 4.7
Vehicle Year: 2006
Vehicle Make: Jeep
Vehicle Model: Rubicon

Re: Stroker injectors question

Post by 06-Rubicon »

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
Posts: 8
Joined: July 8th, 2016, 7:13 am

Re: Stroker injectors question

Post by jakewalter »

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
CAUTION:
Don’t let your wife find out that you’ve been using her favorite nail polish to mark your parts.
User avatar
Cheromaniac
I live here
I live here
Posts: 3180
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
Contact:

Re: Stroker injectors question

Post by Cheromaniac »

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 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
jakewalter
Posts: 8
Joined: July 8th, 2016, 7:13 am

Re: Stroker injectors question

Post by jakewalter »

Thanks Cheromaniac for the information.
Has anyone used the newer Bosch Gen 3 injectors?
Thanks so much,
Jake
CAUTION:
Don’t let your wife find out that you’ve been using her favorite nail polish to mark your parts.
Cannonball
Posts: 7
Joined: April 5th, 2011, 7:25 pm
Vehicle Year: 2004
Vehicle Make: Jeep
Vehicle Model: Rubicon

Re: Stroker injectors question

Post by Cannonball »

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
Posts: 7
Joined: September 11th, 2010, 1:26 pm
Vehicle Year: 2001
Vehicle Make: Jeep
Vehicle Model: XJ
Location: Phoenix, AZ

Re: Stroker injectors question

Post by wldc10 »

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
Strong Poster
Strong Poster
Posts: 889
Joined: August 15th, 2009, 1:27 am
Stroker Displacement: 4.7
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Stroker injectors question

Post by Russ Pottenger »

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

Who is online

Users browsing this forum: Ahrefs [Bot] and 10 guests