Hey guys I took my TVS to Hahn yesterday to get tuned and during the tuning process we lost about 5lbs of boost. So it was only boosting around 15lbs instead of the 20 or 21lbs it usually does. We also found out that when we bypass the boost bypass valve the boost comes back to 18.5 19lbs. So not all the way back to 20 21lbs like I would want to see. Does anybody have any ideas as where to look too see if I can find the problem.

Thanks

 

the boost bypass valve was my problem, so I don't know. Maybe a little belt slippage?

 

do you know what exactly failed on it and did harrop cover that under warranty at all. Im just wondering if anybody else had some problems similar to me im working on getting the log from Hahn so everyone can see what it looks like.

 

iiunno what that issue could be...only issue i have is my boost gauge is maxing out at 30psi....because i swapped the SC gauge for the TC gauge..lol. did u hook all the lines up correct?

 

Yeah it was working fine before then we got it up on the dyno and after about 11 runs the boost went down to 15psi but I did the boost bypass and it went back up to around 19 but not hitting the max of 20psi

 

clogged cat? exhaust leak?...iiunno

 

Clogged cat would cause more backpressure resulting in higher boost and I'm almost 1000% the exhaust is ok I'll get the logs up in a little bit so everyone can see what's going on

 

ah...my bad...iiunno man thats weird. I wanna say u have a vacuum leak somewheres but i cant be certain

 

i had the same problem i just unplugged the boost bypass and it was fixed.

 

ya same here. unplugged the bypass and it is where it should be at 15psi... until i dropped pulleys hahahaha.
hey jared got the new numbers didnt do to bad... but like you ive got a 2.5in downpipe so thats my next project. when we swap them ill let you know how it goes

 

ya same here. unplugged the bypass and it is where it should be at 15psi... until i dropped pulleys hahahaha.
hey jared got the new numbers didnt do to bad... but like you ive got a 2.5in downpipe so thats my next project. when we swap them ill let you know how it goes

 

so what kind of numbers was it putting down even though you had probs?

 

if your asking me i did 312hp and 265tq