c15 fuel filter, restiction

Hi all,

New to the forum and somewhat new to the trucking world.

mechanical skill is 7 out of 10

Ok, some history
1.5 yr old c15 in a T660 glider. 86k miles. I dont know everything that was done to it before we got it but I was made to believe port and polished head, custom tune, and blocked waste gate. Run on the dyno was over 700 whp but I forget exactly what.

The problem
Less than 4k miles on the fuel filter and the vacuum gauge is right up near 20. This is pretty regular. We never had it die from a plugged filter. The one filter that was cut open at replacement was fine and the mechanic said good to go for a while. I think the filters last a little longer when its a warmer outside.

The question
Is this normal? If not, where should i start looking?
I want to shine in the tank and look for algae? Or smell?

Thanks in advance!

 

I'll have to check what filter. As I'm only part time here but I just live right across the road. So I'll try to check it.
And where should I be putting a gauge? Right after the primary filter? No, I dont feel any bucking. You mean the turbo shaft will break? I'm not sure what turbo is on but i dont it boosts over 40psi and doesn't often get quite up to 40.
I'll try to check what motor it is exactly too

 

Thank Cam Roberts!
I value the advice from forums, but at the same time I trust the shop that tuned it even more...

 

I think it's a Donaldson. But will have to check the #