Quote:
Originally Posted by Ed Wright
Dan, I know you are a mechanic, so I'm going to explain it.
Should be no manifold vacuum @ WOT, therefore, WOT with the vacuum hose connected is the same as testing in the shop with the vacuum hose removed from the regulator. I have had many LT1s through my shop, and don't remember seeing one with only 43 psi. Maybe your gauge, or you have a Walbro pump?
And Pure Stock rules allow different injectors?
My LT1 car has 60 psi.
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I had LT1 Injectors and replaced them with 24lb LS1’s.
IHRA tech went over the car several times and passed inspection.
They are a direct replacement using same Stock Fuel Pressure.
Using a Bryan Herter high test tune and seems to work fine.
Though could use a good Dynoing with current PS cam.
Still using ODB1 and TunerCat to make little changes.
Using high pressure Walbro Fuel Pump and adjustable Fuel Pressure Regulator.
Set the pressure range from 38/43 psi which is the Stock setting.
Dan