SRT-4 injectors swap?

2.5TJsupercharged

2.5TJsupercharged

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Original poster
Joined
Apr 22, 2019
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Québec (Canada)
Hi everyone, I’ve put a supercharger on my 2.5. My problem is to deliver more fuel in it. I’ve heard the neon srt4 injectors fit in a 4.0l. Is that really true ? I’m assuming, 4.0l injectors fit in a 2.5 engine. But not really sure too. If anyone have any advice thank you. Also looking for any ways to tune my ecu on timing advance and fuel delivery.
Thanks everyone
 
I'm not sure that injectors will be your weak link. I know that in the normally aspirated Jeep world, injectors are viewed somewhere beteween frivolous and worthless when it comes to increasing performance.
I'd try a tuner and fatten up your fuel curve first.
We're not exactly talking about a high pressure system here.
 
I totally agree with you. Low boost dont really need bigger injectors. But the guy from FRP (professional in jeep ecu tuning) told me to put bigger injectors. Making sense because opening injectors for a too long period of time can cause injectors failure and is apparently harder to tune with precision...
I’ve found today some years of TJ’s are using the same injectors P/N for both 4.0 and 2.5.
I made some calc and apparently stock TJ injector are 235cc’s at standard fuel pressure (250cc’s at 49psi, jeep fuel pressure)

And apparently I would need at least 275cc’s injectors...
I don’t know anything more than that...
 
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