how to plumb in my turbo

matt1967

Famous Member
My teacher wants me to start researching, the best way to plumb my '78 Buick 231 turbo into the hot side, using my stock exhaust manifold. here is the turbo, and the manifold is just a standard early manifold ( good shape, no cracks, supprisingly ).
 
well, if you want an original factory flange and a piece of up-pipe to bolt onto the turbo inlet, I can help you out with that.

You would need to get a pair of new flanges and a new piece of pipe to conect to the manifold.

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that's what I was thinking. so I started looking for Flanges, for u weld it type headders, using the GN 3 bolt flange, and found nothing. I can get a set of cheapie chineese GN headders with the flange on it, and hack the flange off the headders, but that's the only way I can see getting a flange. any idea's. I bought a 3 bolt exhaust crimp flange 2/5/8" and the bolt spacing is close enough to work, if I created a flare like what most newer cars use instead of a donut flange, just tightining and sealing around the tapered lip, If I did that to the GN flange with it's tapered lip, would that work?
 
If you are considering yourself handy enough to weld up a intermediate pipe to mount a turbo on one of these cars, you had better be able to cut and grind a peice of 1/4" steel into an appropriate flange.
 
Check with the guys over at Turbobuick.com.I know a bunch of them over there.
 
Check with the guys over at Turbobuick.com.I know a bunch of them over there.
 
The two up-pipes I have are from the 83-84 Buick cars, so yes...it would fit.

I wouldn't send the whole piece (I need the bellows from them for the 4.6 liter project) but I could part with the flange (where it bolts to the turbo inlet) and a piece of the up-pipe.

Then once you have a piece bolted to your manifold (you MUST use the solid steel donut) you just connect in between them.

The reason I suggested two thick flanges stacked together (like I did) on the maniold is for strength.
 
ok, now that that's squared away. I'm pretty shure that my shock tower is too close to the engine, to put the turbo right dead center, so I need to offset it a little, but do I go forward or backward? also, I'm going to run an intercooler, have lots of room in front of the radiator, but will covering up part of the radiator hurt? would I need to put it below radiator?
 
I say forward, thats where Im going. I figure it would give a little cooler temps and I relocated my battery to the trunk. I still havent gotten set location as of yet. I believe there will be more room up there than behind. Tommy
 
hasa68mustang":2vhi1hx0 said:
I say forward, thats where Im going. I figure it would give a little cooler temps and I relocated my battery to the trunk. I still havent gotten set location as of yet. I believe there will be more room up there than behind. Tommy
that's what I was thinking.
 
matt1967":3snw2vzv said:
.....I'm going to run an intercooler, have lots of room in front of the radiator, but will covering up part of the radiator hurt? would I need to put it below radiator?

Right in front of the radiator is fine.
Will
 
matt1967":1p0q5q1k said:
For what that turbo flows = Yes.
what size turbo is it exactly. people have told me T3 super 60, but I don't know, I know it is .42/.63 A/R's[/quote]

Ummmm......no, i think only the GN's and GNX's got a Super 60.

Pull the compressor cover off (six bolts - don't lose the big o-ring) and with a dial calipers, measure the small part and the large part of the compressor wheel and we'll find out. :D
 
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