Boost cut off

[Dawgz]

Ok so, i dont really know how its suppose to work, but i have the vaccume hoses setup like Vampire/TRD4Life/Astro have specified.

I also had a EBC hooked up but some of the wires were not hooked up correctly, so i removed that.

My question is, to the boosted guys that have a boost gauge (most of u guys do), when u get on it and the s\c shows boost, before the tranny shifts, does the needle go all the way back to zero or just nudge back a bit then go back to the boost?


Because right now, when i get on it and its boosting, and then when the tranny shifts, the needle moves back maybe .5psi or 1psi less and then goes back to the psi it was at (max)

[Paladin06Greg]

This sounds like my setup but maybe alittle less change is boost.

"Because right now, when i get on it and its boosting, and then when the tranny shifts, the needle moves back maybe .5psi or 1psi less and then goes back to the psi it was at (max)"

[Dawgz]

So am i good to go or is there a problem with the boost not cutting off far enough?

[Eye8Pussies]

mine moves a bit and then goes back to max- long story short, you're boosting through gears. when an auto tranny shifts, the engine is still under most of its load

the 5-speed guys should see the boost go down to 0psi w/ vacuum when their clutch is down since there is no load.

[Dawgz]

Okay so im good? if it wasnt working right the needle wouldnt move at all correct? and just stay at the boost it was before the shift.

[Paladin06Greg]

The EBC was designed to do the same thing for the auto tranny. Some have elected to eliminate the EBC which will cause damage to the unbuilt auto tranny over time.

[Dawgz]

Yea but the vaccume hose hook up does the same thing the ebc does, so would it still mess up the tranny?

[Paladin06Greg]

Perhaps I'm not sure. Do you have a tranny cooler? That will help.

Yea but the vaccume hose hook up does the same thing the ebc does, so would it still mess up the tranny?

[Dawgz]

yep, the tranny cooler was installed 5 minutes after the s\c was installed.

[Paladin06Greg]

Good man..

[Akfahad]

the 5-speed guys should see the boost go down to 0psi w/ vacuum when their clutch is down since there is no load.

Precisely...goes all the way down to 20 Vac.

[Dawgz]

so on auto it just nudges the needle back a bit?


because im still unclear if my situation is wrong and needs to be fixed/modified, or am i okay...

[Paladin06Greg]

Yes preventing full boost when changing gears. Sounds like you might be ok.

so on auto it just nudges the needle back a bit?


because im still unclear if my situation is wrong and needs to be fixed/modified, or am i okay...

[Eye8Pussies]

Who w/ an auto has the ebc installed w/ a boost gauge? I was under the impression that the ebc cuts boost completely when changing gears (maybe not into vacuum, but at least to 0psi of boost).


In my opinion, as long as the gauge shows boost, then you ARE boosting through gears and in the territory where you WILL cause damage to your tranny over time...especially if you go WOT all the time through gears. After all, for an auto tranny, the engine IS still under load when changing gears.


But a tranny cooler will always help....even a baby one like that one

Here's a picture of the one that I have/had (just took off during my swap)



And the scary thing is that on a warmer day and I get stuck in traffic, my tranny temp STILL goes up to 210F- once the car gets moving though, it cools down really fast

[Dawgz]

OK so now i dono wat to do haha.