Thread: Boost gauge boost pick-up

Have you driven the car or are you testing for boost in neutral in the driveway?

Originally Posted by *RR*

I hooked it up tonight using the boost line that run into the injector pump.

Don't do this had the same symptoms on my VM, Find a clean source for your gauge.

Vm

Driven it.. full load through to 3500rpm in 2nd and 3rd (auto)

Originally Posted by VM_Motori

Don't do this had the same symptoms on my VM, Find a clean source for your gauge.

Vm

Ahhhh, very good! I suspect that could be the problem, but I couldn't see how it could be! the pump boost line comes directly from the actuator line, unless if does something weird behind the engine.

I think I'll tap a hole into the inlet manifold.

Me either but had just the same thing happen only made 10psi rather then 16 swapped in out and 16psi again

Hope you get the same result's

It's a pain in the bum, as I cut the line, so I'll have to buy a joiner or something now...

the thing is, it's WAY out, like it's missing 10psi!

oh well, I'll install a fitting into the inlet manifold and read off that...

Doh!

I just used a Tee piece and the ran a 2nd line to the pump 2in long

I hate cutting anything!

Vm

Originally Posted by VM_Motori

Doh!

I just used a Tee piece and the ran a 2nd line to the pump 2in long

I hate cutting anything!

Vm

Success!!

I tapped a new hole in the inlet manifold and re-routed all the hoses, so the turbo actuator and IP diaphragm get boost reference from there rather then the turbo outlet and I used the old hole off the turbo for the boost gauge...

Boost varies from about 15-17psi at full load...

...now to fiddle with the actuator shaft and get 20psi!!