I'm not sure if this is the right board for this but here goes. I have an 89 355 GTA with forged pistons, aluminum heads, Shnyder cam, SLP Headers and then some.

The question is: In 89 did GM correct the fuel pressure to around 50psi or do I need an AFPR to bump it up to 50psi?

I have read more than once this will help with a few more ponies.

Just looking to max out my current set up.

Any tips or info would be helpful.

 

Most of the stock ones Ive tested have been anywehere from 46-48... some say it should be lower in stock form, but thats what I got. Anyway, an AFPR will be good for you... youll be able to bump it up to what ever you want... just dont go too crazy or youll end up frying your fuel pump!

 

What year cars have you tested? I read that in 89 GM increased the fuel pressure, is that true? Thanks for your help.

 

most stock fuel pressure ratings are in the low to mid 40s

varies with cars

i have a like new TPIS adjustable regulator for sale.....$50 you pay shipping.

they are $90 new

let me know