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wastegate plumbing 

 

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 Post subject: wastegate plumbing
Posted: Mon Jul 21, 2008 9:08 pm 
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what are your thought's on having the wastegate plumbed straight off your turbo exhaust housing. it alway's use to hold 14 perfectly and go straight to it, but now running more and a different plenum (which shouldn't make any difference as my boost reference line is straight after the turbo) i have a 7psi spring to run 17 and it sort of starts at 12 and end's up at 17.
i thought it might be the way it's plumbed off the manifold, not getting enough exhaust flow. hence the idea of putting it straight off the housing. just funny how it use to work really well. your thought's.

marty
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Posted: Mon Jul 21, 2008 9:54 pm 
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yes strait of the housing work very well.


has your tune changed?

has exhaust changed?

 

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Posted: Mon Jul 21, 2008 9:55 pm 
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Its the best way to go as far as boost control goes if you dont mind cutting into your housing.

ebs_4l, 6boost and ETM all do it because it works the best.
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Posted: Mon Jul 21, 2008 10:06 pm 
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the only thing with the exhaust is the cat is a little more see through, going straight off the housing is the easiest way with the room available. would it upset the flow to the turbo much or like you say alot of quick car's do it
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Posted: Wed Jul 23, 2008 8:05 pm 
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Dansedgli wrote:
Its the best way to go as far as boost control goes if you dont mind cutting into your housing.

ebs_4l, 6boost and ETM all do it because it works the best.

But if you have the room......the next best thing...IMHO
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Some housings are already cast with flange for wastegate, but i think they are only racing versions.....but i could be wrong...

Cheers

8-) Daz 8-)

 

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Posted: Wed Jul 23, 2008 8:54 pm 
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that's pretty much what i've got. and after reading ebs 4l , he stuffed around, plumbed 2 into 1 sort of thing and still didn't work, so it'll probably go on the housing.
is your's running daz, does it work well
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Posted: Wed Jul 23, 2008 9:39 pm 
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justa6 wrote:
that's pretty much what i've got. and after reading ebs 4l , he stuffed around, plumbed 2 into 1 sort of thing and still didn't work, so it'll probably go on the housing.
is your's running daz, does it work well

Yeah mate, but had an ignition and timing issue which has been sorted and i am waiting for the call to come and pick up the car. I am expecting the wastegate to work properly. Stinger is controlling the boost, which has reached 14 psi at 4000rpm.

Cheers

Daz 8-)

 

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Posted: Wed Jul 23, 2008 9:48 pm 
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what turbo is it , seem's a bit late
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Posted: Thu Jul 24, 2008 8:44 pm 
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justa6 wrote:
what turbo is it , seem's a bit late

T70.....a bit late???not sure what you mean, starts to boost at 2000rpm, by 4000, you're definately in the back of the seat....lol

Daz :D

 

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Posted: Thu Jul 24, 2008 10:38 pm 
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mine is at full boost by 2200. your's is full by 4000. no worries just a bit different
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Posted: Thu Jul 24, 2008 10:47 pm 
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yes that is pretty late for a 4l with a t3 turbo.

i would expect full boost at 4000 rpm with a 900hp turbo.

 

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Posted: Thu Jul 24, 2008 11:51 pm 
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Sounds like the trim on exhaust wheel needs changing to tighter / lower trim ??

What type of wastegate is that ??
I have heard bad bad things about cheap E bay w/gates etc...

 

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Posted: Fri Jul 25, 2008 8:00 am 
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mine's a 48mm turbosmart progate, not sure what daz has
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Posted: Fri Jul 25, 2008 11:22 am 
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heres a pic of one etm has done for a ba.

 

 

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Posted: Fri Jul 25, 2008 7:04 pm 
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yeah that's the go, if ebs 4l is around what's the best way to go around welding it. use cast bend's, pre heat the housing up, tig it then let it cool slowly. almost post heat. any particular filler.
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