6psi on stock injectors?
Yes it would lean out, but due to how small those injectors are, it might not be a change from 10.9:1 to 12.5:1 it's probably going to go from 10.9:1 to over 15.1:1-16.1:1 and that at WOT and full commanded timing and 7psi of boost will blow the stock motor very very fast. There will be more damage done in the time it takes you to realize it went lean and lift off the throttle trying to save it than can be salvaged.
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TECH Resident
Joined: Jul 2010
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From: VA
ok, would 60lb injectors be good up to say 600-700rwhp on a built forged short block? only reason i ask is im tryin to sell my truck atm, and if i do im lookin at puttin the money into gettin a full forged engine for the car (wont be for a while but) would these injectors handle it or will i need to upgrade? along with fuel system and all too of course but
60lb injectors with dual intank walboro 255 fuel pumps, aftermarket rails, and upgraded feed and return lines will support 800rwhp at the most from what I have seen. They will probaly max out the duty cycle around 750-800rwhp. I put down 640rwhp on 11 psi and the most my injector duty cycle is during a 1/8 mile run is 86% but it averages 76-79% duty cycle on my car.
Only problem is the stock feed, return and rails will limit you to about 700rwhp at the most if not less than that.
Only problem is the stock feed, return and rails will limit you to about 700rwhp at the most if not less than that.
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From: VA
Hmm ok, still lookin into everything, was checkin out ur sig, u have stock bottom end and are runnin 11lbs, what heads are u running/what made it safly run at 11psi and put down about that much? Cause thats basically what im lookinf for, just didnt think u could get it out of the bottom end. Do u feel with stock bottom end and 317 heads upgraded valve springs i could run 10 ish psi safly? And fuel system support of course
60's will take you all the way into the mid 700's most likely. I was running 60's with twin GS-340's and aftermarket rails with my D1SC combo, never went lean at all. I just bought new injectors now...I'll actually be selling my 60's soon if your interested. With my D1SC combo I was running 317 heads on a stock bottom end....ran it like that for over 40K miles with little issues. Made 590/563 wheel on 10psi. Its all in the tune...I also ran methanol which probably saved my *** lol
Hmm ok, still lookin into everything, was checkin out ur sig, u have stock bottom end and are runnin 11lbs, what heads are u running/what made it safly run at 11psi and put down about that much? Cause thats basically what im lookinf for, just didnt think u could get it out of the bottom end. Do u feel with stock bottom end and 317 heads upgraded valve springs i could run 10 ish psi safly? And fuel system support of course
Thread Starter
TECH Resident
Joined: Jul 2010
Posts: 905
Likes: 0
From: VA
hmm interesting, thanks guys! might just go with 317 heads and injectors for now and see how that does and see what my iat is, i have a small intercooler and havnt been able to check it yet, whats considered a low or safer iat range? none meth
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