Thanks Guys, sorry for the trouble.

Appreciate letting us share info and try to get the help we need.

Lets keep this thread going and rule abiding!

 

Well I couldn't find my old thread so I figured I'd post here. Just got my boost gauge installed, and it turns out I'm only making 6psi, sometimes running up to 7ish. This is with the stock pulley, stock balancer...I can't think of a reason why it might be making less than the 9psi advertised with the kit. Ideas?

 

the camshaft.

 

I considered that, but it isn't nearly radical enough to bleed off 3psi. There are other TVS1900s with my cam making the rated boost.

 

Well now you really need to get in gear and make some pullies!

Yeah, i would say your cam/ exhaust is where your losing the boost . Your motor is breathing better, less restriction, more " quality boost" .

I could be wrong though LOL.

 

I dont see his cam and exhaust setup droping the boost that much.

 

Exactly. Haven't dynoed it yet, but that explains why my truck only ran a best of 13.03

 

Yeah, but what else besides a leak could contribute to boost loss?

He's loosing roughly 2 lbs.

Any other NNBS 5.3's with some boost numbers to compare??

 

I dont feel like looking up the specs or running the numbers but the gt7 IIRC should be a 0 overlap cam, or damn close to it. If it is, then it wont bleed any boost off. Your exhaust isnt that free flowing either. Its either belt slip or a leak somewhere. Either between the manifold or between the manifold and heads. Before I got too crazy Id get it on a dyno.

13 flat aint bad for the very conservative combo youre running. What was your trap speed?

 

It's not that his cam is "bleeding" boost, his motor and exhaust is flowing more air which equals less restriction then a stock stock motor and exhaust. Boost is just a measure of restriction, remember?? On top of that, he's about 26-2800' above sea level, so he's gonna loose some for altitude too. I would say 2psi under advertised is about right for your mods and altitude with that pulley setup.