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91 GSX

TCB91GSX

Proven Member
225
192
Jan 11, 2021
Denver, Colorado
Porting the Evo 3 to match my turbo.. just took off the inner step portion.


Couple stock 2g vs Evo3 comparison photos w/a 7cm gasket lined up.
Openings:
Stock 2g is around 54mm.
Evo 3 is around 60mm.
 

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TCB91GSX

Proven Member
225
192
Jan 11, 2021
Denver, Colorado
Picking up where we left off…


Broke a piece of the casting on my head off, there was still some decent threads back there so against my liking I decided to send it. Screwed the sert back in and moved forward. It was surprisingly stable.

While installing the exhaust manifold studs I noticed some threaded in more than others.. it was recommended that I chase them to clean them up so I picked up a thread restoration kit from Napa and went on my way. Cleaned them up and they all threaded in pretty much the same after.

Cleaned and polish my intercooler pipes. Painted my power steering heat shield w/high temp plate. Cleaned the exhaust manifold ports and everything else in that area while I had the turbo out.

Snapped two turbo bolts getting my old one off (go figure), received those installed and torqued them with nickel anti seize, hoping they come off better next time.

Went back and forth on running a 90 degree fitting off the OFH vs a straight. Ended up running a straight fitting and a 90 in the line, 24” was almost perfect had my fitting into CHRA not needing adjustment. I’m going to have a local shop fab me up a line with a 45 off the turbo since the current set up rubs on the j pipe pretty hard.
Double checked I put everything back together correctly x10…
Filled it back up with coolant and went for a drive.

Took it super easy the first few times out and then started to get on it a little bit more tonight.

From a log perspective, this turbo is showing an additional 5lbs/min at the same rpm and the same tune. Running into a little bit of knock, looking for more seat time to make adjustments.

Cerakoted exhaust manifold actually paying dividends, it keeps the hood temps much cooler than without. Super surprised with how efficient it seems.
 

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TCB91GSX

Proven Member
225
192
Jan 11, 2021
Denver, Colorado
New valve cover and Kiggly HLA.


Chased all the valve cover mounting threads.
Installed the metal half moon, hopefully it stops my leak in that corner.
 

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TCB91GSX

Proven Member
225
192
Jan 11, 2021
Denver, Colorado
Few photos I took on a film camera…
 

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1cleangsx

5+ Year Contributor
722
602
Sep 28, 2013
Cheyenne, Wyoming
How many miles on the clock? Sounds like your considering a rebuild this winter? I highly recommend AMS auto and machine in Fort Collins, I’m a little over 300 miles on my engine they built with great oil pressure and a catch can that stays bone dry after pulls:D
 

TCB91GSX

Proven Member
225
192
Jan 11, 2021
Denver, Colorado
How many miles on the clock? Sounds like your considering a rebuild this winter? I highly recommend AMS auto and machine in Fort Collins, I’m a little over 300 miles on my engine they built with great oil pressure and a catch can that stays bone dry after pulls:D
I DM’d you some time ago as I saw you were close and you shared that! Much appreciated. Considering either them or MadCap Racing which does have a 4G torque plate. I recently found out they do all the work for Carz Performance and are there sister company.
 
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