2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

T61 turbo hot side size too big? (1.15)

Old Mar 7, 2005 | 03:08 PM
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T61 turbo hot side size too big? (1.15)

I am thinking about getting a t61 turbo and was just wondering if the spool will be laggy because of the big size. The hot side is 1.15 which i heard is pretty big. The setup will include my current mods listed below, but the engine will be with judge ito's street port. This will be with an HKS manifold.
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Old Mar 7, 2005 | 06:22 PM
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1.15 divided hotside?? Hmm, from what i remember hks cast manifold only came undivided (flange) for 87-91 turbo application. Might wanna look into getting at least a divided exhaust manifold so turbo could spool better if not use a .96 a/r turbine section with hks manifold. Hope that helps a bit.
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Old Mar 7, 2005 | 06:29 PM
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Originally Posted by SleeperRx
1.15 divided hotside?? Hmm, from what i remember hks cast manifold only came undivided (flange) for 87-91 turbo application. Might wanna look into getting at least a divided exhaust manifold so turbo could spool better if not use a .96 a/r turbine section with hks manifold. Hope that helps a bit.
Your right, I have only seen one style manifold for the FC turbo app, and its the log style undivided.

You can use an FD manifold (divided HKS) but it costs like 1200$ and on top of that, the turbo will not clear the LIM on the TII
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Old Mar 7, 2005 | 07:10 PM
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well so you know I have a 1.15 hot side with divided flange and its rather Laggy, but Still when she kicks in its a hell of a lot of fun
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Old Mar 7, 2005 | 10:00 PM
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It depends on what you define as "laggy". You can always take off the 1.15 housing and get a smaller, collected housing to match the HKS cast manifold.
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Old Mar 8, 2005 | 08:26 AM
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yeah I have the HKS undivied cast manifold and I am waiting for my turbo to get here in the mail so I was just fabbing it up with a 1.15 divided backside I had at the house and I was having a hard time getting the bolts to line up. The damn hex heads hit the manifold and if you try the other way the hex heads hit the backside housing?
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Old Mar 8, 2005 | 10:30 AM
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I have a friend that has one ,but its ball bearing it spools up about 300-3200 rpms
its pulls like a **** though and I would seriously suggest buying one. I might be buying his set up b/c hes going t-88or t51r route
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