Hello,

I will buy a new fuel pump and fuel regulator, I have a 91 Trans Am GTA and I did my swap successfully (enough) I need to regulate my fuel pressure to 47-55psi (with the vacuum hose disconnected) My question to you is that are these products fine to my engine and car...

regulator:
http://www.summitracing.com/parts/MA...M/?image=large

pump:
http://www.summitracing.com/parts/BBK-1630/

(I know that 100psi is not necessary but I am planning to do a NOS upgrade so I might need it)

gauge:

http://www.summitracing.com/parts/ATM-2663/

The price high, I wonder why, Is it because of the sending unit? There are 45 $ gauges with no sender units...

Thank you

ps: you can have a look at the project from this link: https://www.thirdgen.org/forums/engi...305-502-a.html

and watch the video: https://www.thirdgen.org/forums/memb...deo-502-a.html

 

i replyed to your other thread before seeing this one, but those parts should work fine,
Edit: the regulator is fine.

another fuel pump to look at is the walbro 255 units. very good pumps as well, and are used by alot of people on here and across the world. good stuff!
im not sure on the bbk unit, i havent heard anything bad or good for that matter.

auto meter is practically the industry standard in gauges. its price is because its electric, normally means more $$. the cheaper ones arent ment to be mounted inside for safety reasons.
they make in car fuel pressure gauges that are not electric as well, they use a diaphram that actuates a neutral fluid to feed the gauge.

 

Ok than, I found the pump you said, It is better to buy the pump that has already been tried....

http://www.summitracing.com/parts/VP...2/?image=large

Is this the one?

255 psi is too much, I need to use a regulator but the regulator that I only found supports max 100psi, Does it mean that It can only reduce to 100psi? or It works with max 100psi inlet pressure?

Can you suggest one as well if the one that I showed is not ok or If there is a better one...

Thanks for the reply...

 

Upsss it was not 255 psi (phhyy what was I talking about), It was 255lph so I guess it is around 51-54 psi right?

My question about picking the right regulator still valid.

 

that regulator will work, i forgot that fi uses the vacum nipple, my bad. i run a carbed setup.

 

Either the Walbro or BBK pump would be fine. They are rated free flow, not pressurized flow. But, either will support the 502 just fine.

The regulator has the vacuum fitting, which lowers pressure at idle and cruise. I don't know what GM says the 502 pressure requirements are. The instructions that came with the engine should tell you were to set it and whether to use the vacuum port on the regulator.

 

"The 48-55psi figure is with the fuel pressure regulator vacuum line disconnected" the manual says... and more 37psi (I guess) is the vacuum hose connected... Am I right?

 

Sounds right.

 

Ok, thanks for the reply...