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I can't seem to be able to hold boost at the line with my brakes. Vaccum conversion - check valve seems to be holding. Gbody rear upgrade. (new) Akebono front pads (new) any recommendations on where to look next?

Hi, was just at the track this past weekend and two issues that I can see with my combo. can barely build boost of the line. need to shift to 4th to trap higher than 104mph. 2.3 60 foot, 0 boost launch. 12.9 @ 109mph. I think a converter is the next step to making this combo work better...

I was running the one on the left, simple grainger valve. I bought a gt3255 and the previous owner threw in an RJC boost controller. I like the way my original one adjusted, is one really better than the other? Sent from my GT-P5113 using Tapatalk

well it happened. while taking off that rear bolt on the passenger side to remove the fuel rail. I broke one of the hard metal lines. question: replacement metal lines available from parts store or vendor? Could someone note use the original lines and run regular vac lines? Sent from my 500T...

Ok. got my 1987 GN 2 weeks ago. 17000miles has LS1 MAF, Cold air intake. Catless exhaust system. stock turbo, stock injectors. Fuel pressure regulator (looks like theGN1) vaccum brakes. has AlcoholInjection System not hooked up. (dosnt look to be progressive, another thread on this in the alky...

here is my new to me 1987 GN. more photos can be found here: https://www.flickr.com/photos/123921746@N05/with/14034452865

Hey, been a member for almost 10 years without a TB of my own. finally took possession of a 1987 Grand National with 16200 miles and minor tweaks Car has the following: catless exhaust - stock headers Alcohol Injection Systems trunk mount system (not connected) some type of boost controller...