for my 383 build. I just bougth these 30lbers for the heads/cam swap. but now that im doin the 383 build should be around 425-450 RWHP when its finished. I may step up to some afr's or somthing with a bigger port if the power isnt there. so what I wanted to know is, at my power level, will the 42 lb/hr inj.s be too big to run right? or will it run the same as the 30's w/tuning obviously. I have an oportunity to buy the 42's (from a friend that owes me a favor) for $100, I know I can sell the 30's eventually for that. Im thinking if I DO get the aftermarket heads, I'll have to step up to bigger inj.s too. so why not do it now? what do you guys think? or do you think the 30's would be sufficient for a 383 with 11.1 CR, 233/239 cam, aftermarket heads, and 4.10 gears. ofcourse I have all the bolt ons too.
chris

 

there is a chart for injector sizes somehwere here on the net. I have seen it from a link on this message board. Somebody hopefully will post it.

 

42lb'rs@56PSI will get you in the 650-700HP range,if you have the heads,intake,and cam to go that high.

 

Here ya go. I found this for ya.
http://www.rceng.com/technical.htm

 

30lb'rs@45PSI will go 500FWHP with a 85.1 duty cycle.