Wow – I never thought this thread would end up in a flaming contest. My initial answer assumed that we were discussing a stock SB400 and a 600cfm carburetor. I also made the assumption that the engine was utilizing a stock (original) mechanical fuel pump (GM 6470779 or similar) that is designed internally to limit pressure to not greater than 7psi. Though a filter, this application typically ends up with about 5-6psi max at the carburetor inlet. Remember that these GM mechanical pumps have done a pretty good job as designed for over fifty years in – on many a Carter carb. My comment about the gauge was intend to state that a gauge doesn’t regulate anything – it simply indicates what the pressure is at the point of insertion (of the gauge).

That said, if you want a fuel pressure gauge – install one. If you’re experiencing symptoms of too much fuel pressure, the gauge can be useful in diagnosing and if the pressure is too high, a regulator can be installed. Race applications obviously have some different overall requirements - but we're discussing stock application here with the exception of the 600cfm aftermarket carb.

It would appear that we all have opinions and that’s what this forum is all about. To exchange a few good natured “barbs” is expected, but to engage in the level of character assassination seen here is, in my opinion, really counter productive and leaves me a bit confused as to why it’s necessary.

I’ve too read a lot of books but also have had my share of grease under my finger nails. I’ve built a bunch of motors – several really sweet ones – but broke a few as well and have been frustrated to tears when I can not find out why the small block that ran well before will not idle worth a darn after I’ve installed a new manifold and carburetor only to read a hint on this form that not only addresses the issue – but gives me what I need to fix the problem and once again helps me realize how much I just plain enjoy wrenchin’..

I have never met anyone on this forum face-to-face, but would like to think I could sit and have a coffee or a beer with any of you and enjoy putting a face to someone who, in all likelihood, has shared information that has been of value to me (and others, I’m sure) as I have participated on this site.

Can we keep this civil? Thanks for lettin’ me vent a bit!

Regards All,
Glenn