Timing and fuel pressure

306 BLUE GT · 02-21-2002, 08:20 PM

I have just recently got my 89 GT back from the engine shop. The timing and fuel pressure were not set correctly as far as I know. What should I set the timing and fuel pressure at. I have a 306 with a B cam GT40 Y303 Aluminum heads with 1.72 roller rockers, ported, polished, and bigger valves. I have a GT40 intake port matched to the heads. I have a 77mm MAF calibrated for 24 lb injectors and a 65mm throttle body. I have long tube headers, and a Mac off road pro chamber H-pipe. i had the stock timing set at 14 degrees above tdc, but I am not sure what to set the timing at now or what fuel pressure I should run. I still have the stock EEC, but I'm getting that reprogrammed in a week, is ther any way i can get it to run halfway decent until then?

Hozer 88GTConv · 02-21-2002, 10:00 PM

I have nearly the same setup, just TFS heads and a 73mm MAF...but I run 43psi@idle via a 225lph/pump and Kirban FPR. 14* BTDC works good with my B303 cam to keep the idle happy. I have had it up 18* but it is not worth doing that to the motor for such a minor gain in performance. Just my opinion...

306 BLUE GT · 02-22-2002, 12:16 AM

Thanks...that's a big help. I'll post how it turns out.

02-21-2002, 08:20 PM	#1
306 BLUE GT Registered Member Join Date: Feb 2002 Location: New Jersey Posts: 15	Timing and fuel pressure I have just recently got my 89 GT back from the engine shop. The timing and fuel pressure were not set correctly as far as I know. What should I set the timing and fuel pressure at. I have a 306 with a B cam GT40 Y303 Aluminum heads with 1.72 roller rockers, ported, polished, and bigger valves. I have a GT40 intake port matched to the heads. I have a 77mm MAF calibrated for 24 lb injectors and a 65mm throttle body. I have long tube headers, and a Mac off road pro chamber H-pipe. i had the stock timing set at 14 degrees above tdc, but I am not sure what to set the timing at now or what fuel pressure I should run. I still have the stock EEC, but I'm getting that reprogrammed in a week, is ther any way i can get it to run halfway decent until then? __________________ BMF 306ci 89 GT

02-21-2002, 10:00 PM	#2
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Fuel pressure I have nearly the same setup, just TFS heads and a 73mm MAF...but I run 43psi@idle via a 225lph/pump and Kirban FPR. 14* BTDC works good with my B303 cam to keep the idle happy. I have had it up 18* but it is not worth doing that to the motor for such a minor gain in performance. Just my opinion... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

02-22-2002, 12:16 AM	#3
306 BLUE GT Registered Member Join Date: Feb 2002 Location: New Jersey Posts: 15	Thanks...that's a big help. I'll post how it turns out. __________________ BMF 306ci 89 GT

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