LS2 90 TB Flipped?
Thread Starter
Race Director
Joined: Sep 2005
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From: Pasco WA
LS2 90 TB Flipped?
I've got a FAST 90 w/ LS2 TB, which, of course, has the actuator pointed to the pass. side, like all LS2s-up. I just ordered a SC kit, and I have to flip the TB 180 deg., which will interfere with the power steering reservoir. Does anybody have experience moving the PS bracket to clear? Any help/advice would be appreciated. Dave.
Tech Contributor
Joined: Jan 2007
Posts: 19,401
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From: Dyer, IN
I've got a FAST 90 w/ LS2 TB, which, of course, has the actuator pointed to the pass. side, like all LS2s-up. I just ordered a SC kit, and I have to flip the TB 180 deg., which will interfere with the power steering reservoir. Does anybody have experience moving the PS bracket to clear? Any help/advice would be appreciated. Dave.
Pro
Joined: Feb 2005
Posts: 652
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From: Upton MA
I changed my ls6 manifold to a fast 90/90. I have a procharger. Yes the TB has to be rotated 180*. I then put the power steering reservoir on 2.125" spacers. I may have also cut the bracket holding the reservoir I don't exactly remember. I got the longer bolts and stand-offs fom McMaster Carr I think I stacked 1.00" with 1.125" spacers. It has been holding fine for a year. You will also need a longer piece of bent hose for the bottom of the reservoir.
Thread Starter
Race Director
Joined: Sep 2005
Posts: 11,060
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From: Pasco WA
I changed my ls6 manifold to a fast 90/90. I have a procharger. Yes the TB has to be rotated 180*. I then put the power steering reservoir on 2.125" spacers. I may have also cut the bracket holding the reservoir I don't exactly remember. I got the longer bolts and stand-offs fom McMaster Carr I think I stacked 1.00" with 1.125" spacers. It has been holding fine for a year. You will also need a longer piece of bent hose for the bottom of the reservoir.
Race Director
Joined: Oct 2002
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
It would push the reservoir forward.
The reservoir is a separate component from the pump (connected to each other with a short pc of rubber hose), so no pulley or belt changes needed, the pump itself wouldn't move.
The reservoir is a separate component from the pump (connected to each other with a short pc of rubber hose), so no pulley or belt changes needed, the pump itself wouldn't move.
Race Director
Joined: Oct 2002
Posts: 16,477
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
An easier alternative may be to just pick up a billet body 90mm TB...which uses all the stock LS1 electrics and motor.
Something like the Nick Williams, LG G2 (these two kinda hard to find these days), or the Rev Xtreme.
Something like the Nick Williams, LG G2 (these two kinda hard to find these days), or the Rev Xtreme.
Pro
Joined: Feb 2005
Posts: 652
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From: Upton MA
I guess I have trouble visualizing the end result... What direction is the res. moved? Up, forward, both? What about pulley alignment, and belt size? Andy said I'd be better off trading my FAST90 setup for a stock LS6 setup, because with boost, the FAST isn't really relevant anymore.
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Thread Starter
Race Director
Joined: Sep 2005
Posts: 11,060
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From: Pasco WA
Thanks. I took a look when I got home, and I'll just keep the FAST setup, and modify the res mounting. Appreciate the feedback. 
I also discovered I have to get rid of my Meziere EWP, and I don't know if my Powerbond UD pulley is gonna work, either. Should've done the SC earlier, I guess.
I also discovered I have to get rid of my Meziere EWP, and I don't know if my Powerbond UD pulley is gonna work, either. Should've done the SC earlier, I guess.
Last edited by zeevette; Sep 10, 2009 at 12:03 AM.
Drifting
Joined: Apr 2008
Posts: 1,316
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From: St. Louis Mo
You won t use the Underdrive pulley. It would slow down your Supercharger too much to make enough boost. You ll need your stock damper or a good aftermarket.(non-UD)
Thread Starter
Race Director
Joined: Sep 2005
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From: Pasco WA
CRAP! Oh well, looks like somebody's gonna pick up a nice cheap pulley. Any suggestions on aftermarket ones that aren't UD, because I don't want to put the stock one back on. It's going to be pinned, and there's been so many failures of stock pulleys, that I won't risk re-using my old stocker.
Le Mans Master
Joined: Apr 2005
Posts: 8,077
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From: Scarborough ONTARIO
Hey zeevette, if u would like to swap my TPIS 90mm TB with yours LS2 90mm TB and its harness than let me know. Its also ported and comes with electronics IAC stepper motor and TPS sensor. LMK.
