I need some help with my blowthrough carb setup. I have my stock gsl-se fuel pump wired to the engine fuse, so it comes on w/ the ignition.



The problem comes in with the fuel pressure. The carb needs very little fuel pressure, the gsl=se one puts out a lot. So, i have put in a mallory 4307M rising rate pressure regulator.



It doesnt seem that it is regulating anything, as it keeps flooding my engine when i try to start the car. Regardless of what pressure setting we put on it, it seems to put through the same pressure.



Some things i'm thinking are the problem:



1) Bad Mallory unit

2) Clogged fuel return line, forcing all fuel through (unlikely, we blew the return line through, didnt seem to be any restrictions.)

3) too much resistance on the return line, need to run to a new location.



What do you guys think?



I thank you for your help in advance



~Geoff

 

Damn Geoff why didn't you just use a 12a pump????Thats plenty of fuel for a blowthru on low boost.

 

You need to change fuel pumps. Way too much pressure for the carb.

 

I dont mean to be rude, but no its not.



regardless, i've figured out the problem, not sure if i've FIXED it yet tho.



the fuel send line was screwed in too far, prohibiting the valve to open and close. i backed it out a bit, and had to bend this bit out to make it move, but broke part of the metal. its a non-moving part i broke, so hopefully it wont matter.



anyways



i'll update you guys tomorrow.



peace