As some of you already know, Im currently building up my turbo project which will probably be done in late january. I was talking to a buddy of mine locally that at one time had a high 12 second turboed neon (not srt4) and he was asking about my setup and disagreed with it on one point; he said it wouldnt be safe to run more than 5-6 psi while using only an fmu... I could swear Ive read on here that we could safely do 8psi, maybe even 9. I was planning on running 8psi but now I question it. what you guys think?

My setup:

small garett t3 .42 ar
31" intercooler
dsm 1g bov
re-enforced obx mani
gsx fuel pump
vortech fmu

so basically, will I be fine to run 8 psi at stock compression with just the fmu and fuel pump? Thanks

 

so I can use stock injectors with walbro pump and aeromotive FPR to run 8 psi (on lowered CR), right?

 

8 is low enough that stock compression is fine D, at least i think...


but can anyone else help me? Whats the main advantage to using a fpr as opposed to an fmu? I thought the stock fpr was fine as long as I had a bigger pump. Please let me know

 

Well I can only give my experience....

First year with turbo,

I ran 440cc injectors, walbro pump, AEM FPR with SAFC2 for tunning. That didn't work ECU kept leaning out the tune.

So I decided to try stock injectors, with a FMU it worked fine for 9 psi but the ecu learned what was going on and eventually leaned that out.

I got sick of trying to find out how/why the computer was leaning me out and bought a Haltech.

So what are you to do?
Either try the extra injector thing or get a standalone.

 

which thing is the "extra injector thing"?? like the 5th injector or whatever that the alpine kit does...?


the friend I mentioned in the first post is convinced that 8psi on stock injectors is "suicide"... Maybe our injectors are bigger than he thinks tho? Anyone else have experience with a setup anything like what I have been planning?

 

No I meant the extra injector thing as the emanage with 4 extra injectors But I still dont recondmend that just get the PrS4.

As for saying stock injectors should be fine for 8 psi. 8 psi on a T25 compared to a Gt35 is a huge difference.

I would say stock 2.0L injectors are good for 160-180WHP. I maybe be wrong don't really know but I do know I have lots of room to work with my 1000cc injectors fing02.gif

 

Ye, your running a fairly small turbo... 8PSI should be handled fine. I wouldn't go over 8PSI... but really I don't see a problem with it from what other members have posted.

Try and find the stock injector size and tell him if he still thinks that way... he'll probably change his mind.

 

stock injectors are 235cc