I'm getting ready to install a P1SC on my 93 Z28. I guess I'll install the FMU for now and wanted to know what size injectors I would need for now.

I've got a set of Lingenfelter CNC'ed heads and a port matched intake and a 52mm Holley in the garage but I probably wont install them for several more months. Will I need to change injectors again when I change the heads?


Its a stock motor w/ a set of LT4 springs and 1.6 roller rockers. Borla headers and catback and it already has a NOS inline fuel pump. I'm also running the LTCC, so I can retard the timing if need be.

I do plan on flashing a new chip and will probably flash an additional one to remove the need of running the FMU.

Also, what fuel pressure is recommended for a starting point.

Thanks in advance.

Mark

 

Sell the FMU, it doesn't seem to like non-stock injector sizes. Go with a 36lb set and some tuning.

Steve

 

Go ahead and get some 42#'s atleast. It won't hurt to have the bigger ones in there incase you decide to pump up the boost later on or add more mods. Hell if it were me I would go ahead and get some 50's .



JK

 

If you do not plan on running the ported heads right away then you can get away with running some 24 lb injectors. I am assuming that you are going to run 8lbs of boost. There is no reason you need 50 lb injectors.

 

Wait....Those ATI fmu's don't like larger than stock injector's? I have 30 lb Accell's and am getting ready to bolt on a P600b kit with an fmu!....Metlegleo...Do you have the inline pump from the kit? I would be interested in it because i didn't get one when i bought a used kit.

 

I have a inline pump from my old P600B. Make me an offer.

 

24# injectors should work for now and yes you will probably need to change then when you do the head swap.

Please explain, ive ran the ATI FMU with stock, SVO 24#, SVO 36#, and MSD 50# injectors with no problems at all.

 

TTT

 

I don't know what it's worth.....50 bucks?

 

I will take 75.00 shipped. Let me know.

 

OK....e-mail is johnnyheater@yahoo.com

 

My FMU worked great with my stock injectors, but once I bumped up to 30's- I couldn't get it to perform consistantly. So, I ditched it and added bigger injectors. And yes, I have the inline.