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What's the max rear wheel horsepower ever supported with a stock TBI fuel pump?

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Old 07-09-2003, 08:58 PM
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Car: 91 RS/ 99 T/A/ 72 Vette/ 02 Z28
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What's the max rear wheel horsepower ever supported with a stock TBI fuel pump?

What's the max rear wheel horsepower ever supported with a stock TBI fuel pump?

I've read the max flywheel hp for a stock TBI fuel pump is about 300 hp. This would suggest between 245rwhp to 255rwhp is possible.

What fuel system mods are needed to support ~300rwhp to 350rwhp? New pump? bigger lines? etc?

Likewise, if a TPI fuel pump has an adjustable pressure regulator on it, how much more rwhp can it support than the TBI pump.

Any info appreciated in advance.
Old 07-10-2003, 05:27 PM
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Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies
With a carb an a TBI pump where I only need 6psi and I use a vacum AFPR to completely close the return line, a lot!
Don't have any dyno numbers though.
Old 07-11-2003, 09:24 PM
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195 rwhp and was able to get the air fuel off the charts below 10:1 or 9:1 where ever WBO2 stop reading.
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