I feel like I should know the answer to this but I dont.

What is drive pressure and how is it measured? I'm sure the answer will explain this but how is it different from boost?

 

was wondering the same thing myself

 

Drive pressure is the pressure between the cylinders and the turbo. Bigger exhaust housing lower drive pressure. Im sure there is much more to it than that but its kinda a rought overview. Im not sure how its measured tho. Can anyone with a big brain answer how its measured?

 

from DDP's FAQ's........

What is drive pressure, and how will it affect my truck?
Drive pressure is the amount of PSI between the exhaust valves, and the turbine wheel on the turbo. Boost is the amount of PSI between the intake valves, and the compressor wheel. If the drive pressure is higher than the boost, you have what is called Negative Delta. Negative Delta can ruin head gaskets, other engine components, and actually slow you down in the upper RPM’s. If the drive pressure is higher than the boost pressure, a smaller amount of fuel, or a larger amount of air is needed.

 

Thanks tritont now I know why everyone is so conciencious about drivepressure That explains why a larger exhaust housing helps with the drive pressure.

 

Any one know how to measure it ?

 

I took the pyro out of the exhaust manifold and installed a line and pressure guage. Go for a rip and have someone read the pressure gauge............
Goodluck

 

Gracias onetun I was trying to make it way too difficult.

 

Is that just a regular boost type pressure gauge? Wouldnt the exhaust temp melt the lines to the gauge?

 

Run a copper line for 3 or 4 feet to disipate the heat then to the regular poly line. ks

 

You use copping tubing for the first several feet...then switch to poly to go into the cab....

 

Darn abc...beat me. I better get back to work.

 

Ah thats what i was thinking.

 

Our permanent in-cab TIP gauge kit uses a coiled 304 SS condensate line, a particle filter and nylon tubing for ease of installation.

We use SS fittings in the existing pyro hole so no new holes in the exhaust manifold have to be drilled & tapped... of course, the pyro remains fully functional.

So far, the stock Holset on the '05 is pegging the TIP gauge at 75psi... mmm, I love the smell of burning paint on the compressor housing!

 

Are you makin these guages? I didnt see them on your site the other day.