Turbos and boost (Full Version)

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Turbos and boost

  

hollcraft1 -> Turbos and boost (11/7/2007 11:12:55 AM)

What would be the reason why a turbo is not biulding boost?  All the vacuum lines are connected and everything else looks ok.  Could it be because all I have is a 3" down pipe off of the turbo?

  
TRBOPWR -> RE: Turbos and boost (11/7/2007 11:16:02 AM)

quote:

Could it be because all I have is a 3" down pipe off of the turbo?


Nope, it should still build boost.  How do you know it isn't building boost?  Not something really easy like a broken guage is it?

sleeper_inc -> RE: Turbos and boost (11/7/2007 1:51:13 PM)

Broken boost gauge, bad wastegate, seized turbo, majour vacuum leak (boost leak)

Fox90_4cyl -> RE: Turbos and boost (11/7/2007 5:05:35 PM)

If it was my car I'd check the guage first, and if that isn't the problem take the turbo down and make sure it spins free, then start replacing vacuum lines (not like they are expencive).If its none of the above you might have to invest in a new waste gate

sleeper_inc -> RE: Turbos and boost (11/7/2007 5:23:52 PM)

Its easy to check the wast gate, take an air compresser and set it to push 15 PSI only and turn it on the hose, if it moves then its fine, if it doesn't move, its blown

turbo2.3stang -> RE: Turbos and boost (11/18/2007 9:21:56 PM)

If it was the wastegate, then you would have an overboost problem since it's not letting any pressure to be by-passed. Check for a locked up turbo.

TBird232ci -> RE: Turbos and boost (11/19/2007 3:06:01 PM)

quote:

ORIGINAL: turbo2.3stang

If it was the wastegate, then you would have an overboost problem since it's not letting any pressure to be by-passed. Check for a locked up turbo.

Not true. Wastegates have an internal spring and diaphram. If the diaphram is torn, youll make more than normal boost. If the spring is worn out, youll make very little boost.

Even with the wastegate wide open, youll still make a few PSI.

turbo2.3stang -> RE: Turbos and boost (11/19/2007 3:17:44 PM)

But he is not making any, so in turn, that would constitute something other than a weak wastegate spring(which would allow minimal boost)

giamanut -> RE: Turbos and boost (11/27/2007 3:11:35 AM)

Post more info! What do you mean no boost? While driving or while reving in your driveway? See that you are running a straight 3" down pipe this is a valid question. If you are reving in your drive you will never show boost unless you are power braking (no load + no boost)
Really need more info

mg man 75 -> RE: Turbos and boost (12/15/2007 11:26:37 AM)

On my conversion turbo coupe in 89, had the clip come off wastegate. No boost. Just another idea to add.

  

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