Hello, I recently built a 383 for my 88 IROC. Nothing crazy, I wanted it to be driveable but with a little more up and go. I have a .510 GM roller cam, ported iron heads, ported upper plenum, 52 mm throttle body, headers, flowmaster exhaust, no cat, evap or A.I.R pump. The motor has 9-1 compression. What size injectors would you recommend? I don't need it to be a ***** out car but a fun daily driver. After I purchase the injectors, I am going to get a custom prom. I am also going to use Ford injectors I just don't know what size to use. Any help would be appreciated. I also have an ACCELL 300+ ignition and any sugestions on timing would be helpful as well.

 

Ford SVO 30 lbs. will due just fine for your set up, but I think even for a mild set-up your compression is a little low 10:1 is better for that cam. Make sure you get a new fuel pump also, like a Walbro 255 high pressure pump PN GSS340M and not PN GSS307M which is the high volume one.You can them here
http://www.racetronix.com/product/RX..._Pump_Kit.html

 

Thanks for the tip. Would the 30 lb injectors be overkill for a smooth idle? Also what fuel pressure would you recommend? I will get that pump that was recommended. I figured a big injector like that would dump excess fuel during idle. But if others out there have had good results with those injectors, then thats the way I will go. Thanks again. Oh, yeah, any recomendations for custom proms? I was going to use fastchip.

 

I would think a set of the "28" pound LS1 injectors would suffice for that setup. You have to run 4 bars of fuel pressure to get the actual rated flow but they should do everything you need and be avaliable at a great price.

 

My 395 stroker runs darn good with 24# Ford injectors at 52psi. However, I am thinking of replacing my SR with the HSR and run this setup with a home made MAF sensor that is 3.5" in OD. Then I beleive that I will run out of fuel, and go with the 30s. Given the above, 24s at 50 to 54psi fuel pressure should provide enough fuel. However, You may need a much better fuel pump.

In any case, it would be best to burn a chip for your setup.