I'm at around 5000' and question the boost pressures I am seeing. The two setups I have tried both yielded numbers that seem a little low so. Just curious what other's experiences have been at higher elevations.

My first setup yielded 514hp with Mach4s and non-gated B1-2. I would see anywhere from 35-38 psi. I didn't get concerned because EGTs would stay under 1350 or so on 5x5.

Current un-dyno'ed setup with non-gated II regular 66 and Mach6s I have a hard time seeing 35psi and EGTs are up around 1500 on 5x5. So the big step up in fuel would explain higher exhaust temps but I figured I would see at least 40psi maybe 45. The guys at II have been great to deal with so nothing bad about them. Brett said he was seeing over 45 when they were out here in July for DieselFest and thinks maybe I have a boost leak. I'm going to crawl around tonight and see if I can see anything but just wondering if anyone else has seen similar low boost numbers when at 5000'+. Thx

 

With my HTT stage III 35/40 and stage 5 jammers I can hit about 40 with temps topping out at 1500. I believe the elevation here is 5200 or 5400.

HTH
Max

 

Something's not right. I peg the wastegate at 48psi at 5000ft with my mods.

 

Thx guys. I'm going to build a leak tester tonight and see if I can find any leaks.