Turbo BS Thread

Yes it does

 

You just got a weird gauge

 

Should I be running higher than -8 to -10 psi at idle ?

 

Also I have the Tial wastegate with the red spring (5.80psi) but the gauge reads 7psi maybe bad gauge (Glowshift)

 

Where is you gauge sourced from? What does your vacuum read at idle?

I am starting to think Jstand might have an unintended vacuum leak? Maybe pcv routing, or other?

 

It prolly isnt a big deal for u since u dont have an ic, but if ur boost gauge read pre ic and ur wastegate boost line was post ic i could see that difference maybe...

 

Gauge source is back of intake were power steering booster goes vacuum at idle is 8 to 10

 

Wastegate is from turbo and gauge is t'd into back of intake were steering booster goes so that could explain that thanks

 

Boost gauge should be somewhere post throttle body.

Wastegate should be referenced from post TB as well. So that any pressure drops along the path to the engine will be negated, and the engine will see the "spring pressure." Which means the turbo might be spooling higher to make that pressure at the turbo.

W/G sourced from the compressor will mean that you could see a lower pressure difference at the engine of 1-2 psi.

All of that follows a good wastegate priority. Meaning how efficiently it can flow out of the wastegate to regulate the intended pressure. Wastegate first, then turbo = priority.

Elevation will effect that.

 

We'll get you squared away, @Jstand.

 

I have a vacuum block t'd post tb (steering booster) ill try the wastegate on the block thx

 

What tor said... The farther from the turbo you go, the more pressure you lose, ic will take even more, so u want to reference everything you can from the manifold to get the most accurate psi that is actually going into the motor if that makes sense

 

If it is this gauge 8 to 10 inhg is vacuum leak.
If -8 to -10psi that is like 20inhg which is normal for idle.

 

I have 20 inhg at idle and like 22 on decel for whatever its worth.

20 inhg = 9.82308 psi

 

https://youtu.be/mmCKqnCjGBs

Whoa buddy this is Toyota turbo porn.

 

I am still here from time to time! Lurking on all of you . Still daily driving the turbo tacoma!

I am selling one of my STIs to make room for a new toy

 

This is what I have I think it's psi the truck runs strong seems like

 

For me the gauge reads 9-10 at idle then 12 on decel

 

It doesn't seem any different whether it's before or after the TB

 

Another update my check engine light keeps coming on I took it to AutoZone to see what it was it's the catalytic converter I need to replace it