losing manifold pressure at altitude

[Joes]

Found the leak! After pressurizing the compresor and the exhaust system I found a massive leak at the collector/ball assembly. Also just a few minor leaks on the injector o-rings. Thanks for all the input from the past and present. Joe

[mshac]

Would you mind posting a photo of the exact location of the leak? As close-up as possible? TY!

[Joes]

Here ya go

[mshac]

Originally Posted by Joes

Here ya go

Great pictures!!!

[Joes]

On the compressor side just remove the air filter and construct a plug made of high density foam with hole for a shop vac hose. The same for the exhaust side thru the exhaust pipe. Best to use a high pressure vacuum reversed. Joe

[GearUp]

Tracking down a very similar problem myself. One of the guys at Main Turbo suggested it's best to remove the spark plug from one cylinder, rotate the crank to open the valve on that cylinder, then use a compression tester to pressurize the cylinder and the intake or exhaust (whichever valve you opened). You'd also need to plug up the exhaust pipe at the end, or the intake at the air filter or inlet of the turbo. If you're looking at the intake side, you can also watch the MAP gauge.

I haven't done it yet, but love the high density foam plug suggestion. Thanks Joes.

[Dan schultz]

I had the same problem with the ball joints on my new exhaust from Acorn, had to send both back for re-work. I eliminated the springs and I am using titanium bolts and 12 point nuts was the only way that I could get them to seal to my satisfaction.
It does hold 75% power to 18k.

Dan
67S P337-0168

[Dr.Dan]

Originally Posted by Joes

Found the leak! After pressurizing the compresor and the exhaust system I found a massive leak at the collector/ball assembly. Also just a few minor leaks on the injector o-rings. Thanks for all the input from the past and present. Joe

How did you pressurize the system?

Cheers,
DD