procharger issues! need help!
03-12-2008, 11:51 PM
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procharger issues! need help! just got off the dyno , on 8lbs i made 443 whp and 431 TQ he said it was 13-14 degrees of timing and afr was about 12.3-12.5 , also i have brandnew lucas 48lb injectors he said they were getting close to maxing out, also im on my stock fuel pump, i was watching my fuel gauge will doing a pull and it went from 58 down to about 50 any ideas on whats wrong, or how to fix my timing issues and afr ??? shouldnt i be somewere aroung 11.2 -11.5 afr and 17-18 degrees of timing??? thanks in advance for any help!! and what power should i be seeing ??? also all this was done on a mustang dynomoeter and i have patriot dual dual springs.
03-13-2008, 12:18 AM
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almost forgot, and when i took it there the trans felt fine, but now if i punch it at 65 it will grab second and seem like it slips a lil then pulls hard up to 6k then bounces of the rev limiter, shifts into 3rd and just sticks!!! at 3 grand i have to left off it and get back in it to go faster, maybe weak torque converter??? or just too much pwr and TQ for trans???
03-13-2008, 04:44 AM
#4
I agree, stock pump is not sufficient. Throw a Walbro 255 litre pump http://www.exoticperformanceplus.com....html?item=777 in the tank and you will have enough fuel. You should have 58 to 60 psi at idle, then it should only come down to around 54 psi at wot.
I'd first have your tuner adjust the shift points on your transmission. Bob
I'd first have your tuner adjust the shift points on your transmission. Bob
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03-13-2008, 07:38 PM
#9
After about 420 RWHP, the stock LS1 fuel pump, usually is just not enough. I'd add a Walbro as mentioned above.
As for your timing, and AFR, that depends on who you talk to and what kind of a car you want. If you want max power, but on the dangerous side, then 12-12.5 maybe good for you. Personally I wouldn't run with anything leaner than a 11.5 on a FI car, and going leaner will only give you a few more HP in the big sceme of things for a sacrifice of the longevity, and safety of your engine. Timing will depend on your setup, but I would say 18 degrees on a mostly stock LS1 would be pretty good.
As for your power levels, 443 on a mustang dyno with 8#'s of boost sounds about right. When you get the appropriate amount fuel to the right sized injectors and aren't so lean, and adding a few degrees of timing might help you break the 455 RWHP (mustang dyno) mark. This is really all just guessing though man. Make it run right, and safe, then just be happy what it does and don't press your luck (especially on a stock bottom ended LS1).
As for your timing, and AFR, that depends on who you talk to and what kind of a car you want. If you want max power, but on the dangerous side, then 12-12.5 maybe good for you. Personally I wouldn't run with anything leaner than a 11.5 on a FI car, and going leaner will only give you a few more HP in the big sceme of things for a sacrifice of the longevity, and safety of your engine. Timing will depend on your setup, but I would say 18 degrees on a mostly stock LS1 would be pretty good.
As for your power levels, 443 on a mustang dyno with 8#'s of boost sounds about right. When you get the appropriate amount fuel to the right sized injectors and aren't so lean, and adding a few degrees of timing might help you break the 455 RWHP (mustang dyno) mark. This is really all just guessing though man. Make it run right, and safe, then just be happy what it does and don't press your luck (especially on a stock bottom ended LS1).
03-13-2008, 08:49 PM
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well i think im gonna just build this trans like a sonofabitch! lol and make sure it dosent brake down the road, anyone know someone that makes a real strong rebuild kit for one of these 4l60e's? and ill prolly do a walbro 255 and a nice FI cam, and retune, hoping for a lil over 500 whp!!!!!
03-13-2008, 09:05 PM
#12