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Originally Posted by Batman
yeah I figured the regulator/fuel pump would be key....which regulator you running?
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I've got a holley 670 (same as the 454 TBI) but it has it's own designed fuel pod and regulator. The regulator isn't upside down which makes adjusting the pressure EASY but I'm limited to smaller injectors. I had to install a beefy spring to get my fuel pressure up to 28 because the spring that came with the assembly was bottoming out at 18psi (bottoming out because it would go from 18 to 40 with less than a 1/16th of a turn).
The TBI fuel pumps are low pressure pumps which really sucks. My old pump couldn't even wet the return line when I had the fuel pressure at 16psi. That was a POS pump and the walbro made all the difference.
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, Jon
Owner of a Red Sled.
If it\'s EFI I can tune it. Specialize in 82-95 GM (yes Lt1\'s)
\"If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn.......Then, you have enough horsepower\" - Mark Donohue
