BruceH
BBB Big Bore Boss 322
So I'm wondering how far people have gone on the stock fuel pump. I've maxed it out at 409rwhp with a whipple and 32lb injectors a few years ago.
I'm asking because it's close to maxing out on pump gas right now. I had an opportunity to do some logging this weekend. A wot pull resulted in a 95% duty cycle with stock 5.0 (32lb) injectors pushing 50psi of delta pressure. This is with the stock power wire.
FWIW I'm na with a 322 cubic inch Big Bore Boss based motor. This was the first time I've been able to do a log since changing from GT500 pumps to the stock unit. As a result of the log I went ahead and added an inertia switch controlled relay with an 8 gauge power wire from the ebc to the fpdm. This should give me some headroom for 92 octane pump gas but I'm not sure if it's going to be enough for E85 when and if I go back to it.
The bench racing portion is now coming up. I will be hitting a dyno in the near future to finalize the tune. I'm wondering where others have maxed the stock fuel pump with stock wiring in relation to rwhp?
Please post up what you made when the stock fuel pump wouldn't supply enough fuel. There is only one other person I'm aware of who has maxed the stock pump on pump gas while n/a. He is also running a Big Bore but his is 304 cubic inches. I'll follow up with a dyno sheet once I get it. Probably going to shoot for Friday or Saturday. I'm thinking that the 8 gauge power wire will cut the duty cycle by about 10%.
Thanks,
Bruce
I'm asking because it's close to maxing out on pump gas right now. I had an opportunity to do some logging this weekend. A wot pull resulted in a 95% duty cycle with stock 5.0 (32lb) injectors pushing 50psi of delta pressure. This is with the stock power wire.
FWIW I'm na with a 322 cubic inch Big Bore Boss based motor. This was the first time I've been able to do a log since changing from GT500 pumps to the stock unit. As a result of the log I went ahead and added an inertia switch controlled relay with an 8 gauge power wire from the ebc to the fpdm. This should give me some headroom for 92 octane pump gas but I'm not sure if it's going to be enough for E85 when and if I go back to it.
The bench racing portion is now coming up. I will be hitting a dyno in the near future to finalize the tune. I'm wondering where others have maxed the stock fuel pump with stock wiring in relation to rwhp?
Please post up what you made when the stock fuel pump wouldn't supply enough fuel. There is only one other person I'm aware of who has maxed the stock pump on pump gas while n/a. He is also running a Big Bore but his is 304 cubic inches. I'll follow up with a dyno sheet once I get it. Probably going to shoot for Friday or Saturday. I'm thinking that the 8 gauge power wire will cut the duty cycle by about 10%.
Thanks,
Bruce