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turbobuick87gn

still learning
Joined
Feb 3, 2009
Messages
113
i recently got a 87 gn. well it came with a new turbo. he says it is a p trim turbo, it has a 3 inch inlet and 2.5 exhaust.. he said it was a 63mm bb. how can i tell what kind of turbo it is and what size convertor would you recommend with it. also is this turbo any good..please let me know i need some help before i put it on!!
 

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Can you post pics of the center section? It will be helpful in verifying it it a BB turbo. The 63 is a nice turbo in my opinion. Good for high tens with the right combo. 3200 stall if journal bearing at least. Just my opinion.
 
here is the center section. what injector and fuel pump would you use with this turbo also..i'm trying to get get low 11s high 10s..also have a 3 inch down pipe, and a 70mm tb and plenum to match would you use them with this turbo..
 

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here is the center section. what injector and fuel pump would you use with this turbo also..i'm trying to get get low 11s high 10s..also have a 3 inch down pipe, and a 70mm tb and plenum to match would you use them with this turbo..
I would use the if you have them. I don't think you have a ball bearing unit there. I could be wrong though. There maybe numbers scribed into the outlet to identify the unit. Do you have Alky on the car? What are your other mods? A single intank walbro will do for that hp level. Injectors...60#ers should be good for that hp level too. You can use them with a stock (un modded for low ohm injectors) ECM and chip. Plenty of boost and no knock will help you to your goal.HTH Im sure others will chime in.
 
right now the car is stock other than cold air and thermostat. i just bought the car about two weeks ago. so you would you the tb and plenum. no alky right now but will buy it after fuel system first. thank you for our help. i was really just worries about it being a decent turbo or not. :smile:
 
Sounds like it's in great shape then. It appears to be a journal style turbo, so I'd say a 3200 convertor would be in the ball park to spin it decently. Did it come with an actuator? If it didn't, then you'll have to get one. You could fab up your stock actuator to fit.
 
You could order a new one from one of the vendors on the board here, or you could post for a used one in the Parts Wanted section. Remember, if you're gonna run over 18 lbs of boost, you'll need an adjustable actuator.
 
well i just went and looked at it and it is adjustable could i just reuse that one for right now. or would you go ahead and by a new one..
 
No. You'll have to use a stock actuator. The adjustable you have will come in handy later if you decide to run alky or race gas. Give Mike a call at Full Throttle on Monday morning...he'll steer you in the right direction.
 
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