Supra Forums banner

1 - 6 of 6 Posts

·
Registered
Joined
·
1,288 Posts
Discussion Starter · #1 ·
Hey guys,
I was out driving today and while boosting I hit around 1 bar (good times...)

At this point the car is still pulling, so I know the BCC is working, but I was just wondering...what exactly keeps it from boosting higher? I know there isn't anything wrong, and I can just go get a boost controller and turn up the boost, but I'm just curious as to what exactly is happening.

Is it just running out of flow, or does the stock wastegate have a limit?
Also, when you add a boost controller, what exactly is it adjusting?
 

·
Registered
Joined
·
9,747 Posts
if you think 14psi is a suprise....at 20psi you will shit yourself, lol

get a bleeder t....VERY cheap, if you like it get a boost controller
 

·
Registered
Joined
·
3,650 Posts
flash_e_gt said:
what exactly keeps it from boosting higher? I know there isn't anything wrong, and I can just go get a boost controller and turn up the boost, but I'm just curious as to what exactly is happening.

Also, when you add a boost controller, what exactly is it adjusting?

The wastegate keeps the turbos from boosting higher by bleeding off exhaust gases before it gets to the turbos.

A boost controller adjusts how much exhaust gas is bled off by the wastegate. So if you want more boost, you tell the wastegate to allow more exhaust to go to the turbo, which in return creates more boost.

Of course the turbo can only make so much 'boost' efficiently to a certain point. But that is the quick 10 second answer.
 

·
Registered
Joined
·
1,604 Posts
HotSoup said:
if you think 14psi is a suprise....at 20psi you will shit yourself, lol

get a bleeder t....VERY cheap, if you like it get a boost controller
Ha! But, at that rate, it won't be the "runs"!
 

·
Registered
Joined
·
1,288 Posts
Discussion Starter · #5 ·
thanks ccwt - so is the wastegate a electronically controlled bypass valve?
I always thought it was a mechanical thing that had an adjustable spring....

So the boost controller sends a different signal to the wastegate controller so it doesn't know to open yet?
 

·
Registered
Joined
·
3,650 Posts
flash_e_gt said:
thanks ccwt - so is the wastegate a electronically controlled bypass valve?
I always thought it was a mechanical thing that had an adjustable spring....

So the boost controller sends a different signal to the wastegate controller so it doesn't know to open yet?
The wastegate is mechanical. It uses pressure inside a diaphram to open/close. The boost controller depends on if it is electronic or manual. Both have the same principle, they control how much pressure makes it to the wastegate.

Like I said this is just a 10 sec explanation.
 
1 - 6 of 6 Posts
Top