Boost Pressure?

[lords88]

How much boost are your gauges reading when you are cruising at 65 or 70mph? Mine is ussually at 10 but today my guage dropped significantly. I think I might have a guage issue, if so what could be the problem. Here are the symptoms is reads lower than ussual like 5-6 lbs instead of 10 but then it climbs up when I accelerate.

[lords88]

Bump any help out there tonight?

[strokin_early_99]

65-70mph hangs out at 5-6psi, 7-9 while towing 10K.

[alabamafrog]

70 mph steady flat, 0-6, towing heavy 8-12, flooring it 30-32.

[bigwhite7.3stroker]

Mine stays around 4-6 PSI at 65-70mph

[PwrStrokinDually]

Originally Posted by lords88

How much boost are your gauges reading when you are cruising at 65 or 70mph? Mine is ussually at 10 but today my guage dropped significantly. I think I might have a guage issue, if so what could be the problem. Here are the symptoms is reads lower than ussual like 5-6 lbs instead of 10 but then it climbs up when I accelerate.

I'm assuming you're running a stocker. If so, here's a couple things to look at. 1. Cracked intercooler boots or possiibly slipped off the pipes. You can look them all over and check the clamps, but doing a leak test by pressurizing the system is best. 2. Turbo is going south. Take off your intake from the turbo and inspect the wheel and shaft. Physically move the shaft up and down, side to side. There should be virtually no play. Spin the wheel and listen...if there's no grinding sound and no play then the turbo is most likely ok.

And I make about 3-6 cruising about 70, around 10 while towing, 40 in my "-20 setting", and 50+ in all of my other settings. I also have a larger 1.28 housing my GT42R so it's not really a fair comparison.