I recently bought a '98 Quicksilver TT w/ 26K miles. When I purchased the car, mods included:

- Exhaust (unknown, but big - looks like 4")
- HKS intake
- Greddy Profec B boost controller

With the Profec OFF, the car would only hit about 10 PSI. I did some research and discovered that the Profec was installed incorrectly. I fixed that problem and installed a Random Tech downpipe (w/ high flow cat) over the weekend. Now I'm hitting about 12-12.5 PSI. Does this sound about right? I figured I'd be easily exceeding 13 PSI with this setup.

with the ebc turned off 12-13psi is normal. turn it on and adjust the settings and you will see more.

Thanks for the speedy response.

I just wanted to verify the "un-aided" boost before starting to tweak the EBC.