I need some guidance. I have a 72 K-20 with a 350 small block, 1406 Edelbrock carburetor and the stock mechanical fuel pump. The engine is running a little rough at idle and the exhaust smells rich. I tested the fuel pressure and it bounces from 8-9 psi (seems high for a mechanical fuel pump).

I searched the site for guidance on a deadhead fuel pressure regulator and there seems to be conflicting information. Some say a deadhead pressure regulator will damage the mechanical fuel pump.

What’s the best option for a regulator or should I go in a different direction?

 

I don’t know about the regulator causing damage to the fuel pump (I think it’s unlikely but I don’t personally know/have experience to advise you), but according to Edelbrock’s installation instructions, 6.5 PSI is the max acceptable pressure. Look at step #6 at the top of page 3 - https://edelbrock-instructions-v1.s3...brock/1406.pdf

Edelbrock can probably provide more detailed technical info regarding the possibility of pump damage when using a regulator, but you might want to take their advice with a grain of salt as they would conveniently carry pumps that are compatible with their regulators.

 

Thanks Gumby22. I installed a regulator a couple of days ago and have a spare pump on deck just in case.