Jeep Strokers

Before I make a final dig in to the build - I was going over AFR management, ECU mods, FlynRyn stuff etc.

A bit confused, but lets go

Star point:

http://www.jeep4.0performance.4mg.com/electronic.html

3 OEM types of engine management + 3 aftermarket EFI + carbed old units.

RENIX 87-90
SBEC 91-95, (OBD 1)
JTEC (96- end of production)
TurboSQUID - any year
Sniper Jeep EFI
Fitech GoEFI 2bbl
Carb


Question to all in the build and those that did it:

Which fuel delivery did you choose?
Which year?
Final injector size? Injector type?
Did you modfy UCU?
Did you modify sensors? Which, how?
Do yoo feel you reached optimum?
Final power? (Recipie stimate, butt dyno, real dyno)
External wide band AFR? YES/NO? What AFR do you read? Stabile over full range?


I read that OBD Ecu (JTec) is self learning and can not be tuned.
Than I read - get a tuner box and contavt FlynRyan and he will do remote tuning

Many thanks in advance for your comments

What is the year and model you are building?

The OP has an '00 TJ so that'll have a programmable JTEC ECU. FlyinRyan and chris@christuned are the go to guys for ECU tuning.

Cummins90 wrote: ↑December 14th, 2021, 8:18 pm What is the year and model you are building?

The 2000, with dreaded 0331 head --> 7120 swap
TJ, 3 cat version
2 cats and O2 sensor and another O2 & cat
OBD II

But I also run a 1990 XJ with Renix that I would like to get cammed with 7120 head swap

I would likr to understand and share good recipies...

Judgin the interior - it is an OBD II XJ
https://youtu.be/RvYOzvRzCGQ

First look into HP tuners


Obviously they have added support for Jeep 4.0
https://forum.hptuners.com/showthread.p ... 99-Jeep-XJ

Need to do a lot of reading over the holidays

Chris does my tuning and I have nothing but good experiences with him.

Cummins90 wrote: ↑December 21st, 2021, 6:23 pm Chris does my tuning and I have nothing but good experiences with him.

X2,

Chris is very knowledgeable and a great guy to work with.

We jumped on a commercial flight together a while back to help tune one of my customers Stroker build. Big improvement.

He can get busy so patience is sometimes required.