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IROCdan330 · 11-05-2005, 03:11 PM

Whats up all...car is having trouble...

Fasterthanyou and I were at atco last night, attempting to tune my car again...but beings my cig lighter is shorted we couldnt datalog, so Jon went by what he felt was going on.

For some reason, my car runs better on the stock 5.0 chip than on a 350 chip. Jon believes its a fuel delivery issue...I bought 24# SVO injectors for the vehicle, yet when Jon set the injector constant at 24, the car ran lean. Right now its at 20# and it has more power/better fuel economy. In the very near future I'm going to swap the stock fuel pump out for a walbro. Could the fuel pump be the only issue or is there something else I should look into. The car has no balls on the top end of its rpm range...and my damn transmission wont get out of 2nd gear by the trap because the governor is letting it rev too high (past 6 grand with a TPI engine).

My first run last night was a 15.8 @ 86 somethin (2.58 60' though). With the stock 5.0 chip, and a better launch (2.2) i ran a 15.0@89...which is close to my 305's best at 14.9@90. Today I ran with my school at atco, and ran a 15.9 on the first run and a 15.5 on the 2nd. both at 86. I gave up and came home after that.

Stuff in the powertrain are as follows:
350 crate engine, vortec heads, lt4 hotcam, scoggin dickey intake base with slp runners, 24# SVO injectors, holley AFPR, hooker headers...the trans was built by ziggy's...if i had a higher revving engine itd be great but yea.

Any help?

11-05-2005, 03:11 PM	#1
IROCdan330 12 Second Club Join Date: Sep 2004 Location: Vineland Posts: 928 iTrader: (0)	A little curiosity as to wtf Whats up all...car is having trouble... Fasterthanyou and I were at atco last night, attempting to tune my car again...but beings my cig lighter is shorted we couldnt datalog, so Jon went by what he felt was going on. For some reason, my car runs better on the stock 5.0 chip than on a 350 chip. Jon believes its a fuel delivery issue...I bought 24# SVO injectors for the vehicle, yet when Jon set the injector constant at 24, the car ran lean. Right now its at 20# and it has more power/better fuel economy. In the very near future I'm going to swap the stock fuel pump out for a walbro. Could the fuel pump be the only issue or is there something else I should look into. The car has no balls on the top end of its rpm range...and my damn transmission wont get out of 2nd gear by the trap because the governor is letting it rev too high (past 6 grand with a TPI engine). My first run last night was a 15.8 @ 86 somethin (2.58 60' though). With the stock 5.0 chip, and a better launch (2.2) i ran a 15.0@89...which is close to my 305's best at 14.9@90. Today I ran with my school at atco, and ran a 15.9 on the first run and a 15.5 on the 2nd. both at 86. I gave up and came home after that. Stuff in the powertrain are as follows: 350 crate engine, vortec heads, lt4 hotcam, scoggin dickey intake base with slp runners, 24# SVO injectors, holley AFPR, hooker headers...the trans was built by ziggy's...if i had a higher revving engine itd be great but yea. Any help? __________________ 87 iroc with the usual go fast stuff heavier than your half ton.