I have been asked what VRFPR I'm using.

It's simple, staked shims are used to obtain required fuel pressure and it looks stock. http://www.turbocity.com/product_inf...roducts_id=602

https://www.thirdgen.org/forums/atta...e-dsc08258.jpg
The TB was sent to Tom Miller from Turbocity, for porting.

 

so you stack the plates on it to get more fuel pressure? I read about that and it says 17 psi is the most that it will do. How much pressure does your application use? Do you know if this will bolt onto the holley tbi unit? (i like the vacuum reference)

 

Correct. I have used this VRFPR @ 28 psi, 24 psi with TopDownSolution's FP spring on my previous LT1 cammed LO3 and courrently @ 15 psi.

The spring rate is going to set the limit.

This is basically a "stock replacement" part for the Rochester TBI http://www.summitracing.com/parts/JET-61500/, the stock fuel pressure regulator cover can be modified to work the same way.

I do not know if the Holley TBI uses the same fuel pressure regulator cover and diaphragm as the Rocherster TBI.

 

I gotcha. I'll compare the holley tbi to rochester since i have them laying around and see. I do have a 30 lb spring for the holley but at this point and time its overkill for my application.