Originally posted by southerner
Thouht about changing the pressure relief/ bypass valve spring for a lighter one. Pump on chevy motor would be a saginaw so the spring is behind the flat nut at the rear of the pump. This nut has the top machined for a union thread for the high pressure outlet, simply unscrew this nut and replace the spring behind it.
Now this is the kind of product engineering i like! I will go take a look at lunch and see 'the nut'...any ideas on what spring to use or where to get one - i can seach through my tool box or can i just try the old cut a bit off the original spring...shorten it shoud reduce the pressure, right?