chillcat

I'm getting a rebuild done on my 383 engine in my 85 and apparently my engine is running too lean, seems the injectors are putting out there max under heavy acceleration. I have stock injectors right now along with a miniram/stock throttlebody/edelbrock heads/forged pistons etc, people told me that the stock would be just fine--but guess not, I was thinking of 30lb----I'm going to post a WTB thread here for whatever size I'll need so If you have what I need let me know---I'd prefer new condition only--not something with Alot of miles. Mechanic says car is too lean, says the headers even glow with too much heat.

Draven

30lb should be sufficient.

opel

Did you change the computer chip? On a friends race car all we did was change the cam and add a super ram and the headers glowed red from running to lean, put in a chip from Ski-down-it and every thing was good. On my 388 I could bearly get it to run with out a new chip.
Dave

chillcat

yeah, the chip is tuned by alvin but based on stock injectors--which again I think is 24, but isn't 24 too small for a 383 engine/miniram and other bolt on's ?

red_johnny

Before my electric took a dump the superram had 22LBS ford motorsport injectors. This was on a 383 with long tube headers and a few other mods. Its probabbly a good idea to burn a new chip.

byebyeL98

I would ask Alvin what size injectors he recommends.

Corvette Kid

Your stock injectors are 19 lbs. What are your other engine mods? I'd be surprised if you need more than 24-26 lbs. unless you're very radical re/ cam, RPMs, CR and etc.

goldeneye_vet

On my 383 superram I run the FMS 24# with a tune from Ski-dwn-it. On Alvin's tune for my 383 I could stick a fork through my headers as they were bright red with an adjustable fuel pressure regulator,TPS, IAC, and timing all set correctly. Ask your chip tuner to get it correct.

Insane1

I have FMS 30#'rs in my 383

93 ragtop

well if it is already tuned for the stock injectors why not run it with them, take some data logs and see where the af is at.
IMO you left out one very important piece of info., and without it I dont see how anyone could make a estimate on injector size. and that is, what cam are you running?

vette_tweak

Assuming you've maxed out the WOT fuel in the chip, continue to use your stock injectors and crank up the fuel pressure...

30's will work but they're larger than required ( I run those on my 6500rpm 420CID )

anesthes

As fuel pressure goes up, volume goes down.

http://www.autoperformanceengineerin...l/fpspecs.html

-- Joe

LD85

FMS 24 lb, thats what I use on my 85 / 409CI.

chillcat

Anyone Selling Some Fms 24#'s ?

chillcat

Will these injectors work ? http://cgi.ebay.com/ebaymotors/24-lb...QQcmdZViewItem