Compressor map for turbo

[millsroger]

My 94 L65 has a B/W GM-4, does anyone know where I can get a chart for it?

 

[tanman_2006]

There is one on the site somewhere but not sure if you can get it on search. I tried and didnt see it right away.

Basically it is out of range by ~2000 rpm and WAY out by 2500 rpm

 

[millsroger]

I found the following:

 

[Woody35]

thats the one

 

[millsroger]

Looked it over last nite, appears to hit 140k RPM limit at 47 lb/min or so, happens that the 6.5 needs exactly that when at 3500 RPM and 12psi boost. It's still at 55% so the only issue I see is whether the exhaust can push it to deliver that much boost at that RPM and that efficiency. Other problem is getting the PCM to allow that much boost. Am told that the -1,2,3,4,6 and 8 are "about" the same so anything over that and the series has overspeed problems.

 

[buddy]

They are all pretty much the same turbo, and all not worth keeping! One of the best modifications is to get a larger, more efficient turbo.