Trying to confirm what turbo my recently acquired 86 GN has

mblum

New Member
Joined
May 23, 2021
I recently acquired an 86 GN and it appears to not have the stock turbo. I'm new to this platform and have been doing a ton of reading and I think I have a TA49 from the research I have done this far, but maybe some of the more experienced members could help me confirm this.

I recently had what I thought was the stock turbo rebuilt and I found out it is not the stock turbo. Here is what I know about it.

Compressor housing - Garrett A/R .60
Compressor housing inlet - 2.350"
Compressor housing outlet - 2.0"
Compressor wheel is a 60-1 (was told this by the company that rebuilt my turbo)

Exhaust housing - Garret A/R .63
Exhaust housing inlet - 2.270" (feeding turbine)
Exhaust housing outlet - 2.320" (turbine outlet)
waste gate puck - .925"
I was told by the company that rebuilt my turbo that the turbine wheel was a "stage 3"

When I purchased the car it had the stock exhaust elbow and down pipe. I plan to upgrade this to a RJC 3" internal waste gate unit, CAT delete, and the car already has a 2.5" dual exhaust.
 

mblum

New Member
Joined
May 23, 2021
Just to add, after close inspection I found a faint engraved "49" on the inlet housing. It was hard to see but in the right light I noticed it.

With that engraved "49" and the other specs I was able to cross over on the internet I'm going to assume this a TA49 turbo.
 
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