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| Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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06-03-2025, 05:25 PM
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#15 |
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Senior Member
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Drives: 2013 Subaru BRZ Turbo
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I actually did the swap last Friday evening. I ran a local autocross event on a smaller lot and the difference was noticeable. The car felt a little closer to the way it used to feel though getting tail happy was still a minor issue, it wasn't something unmanageable like it mostly was with the 4.30. I am going to try to run Mid-Ohio at the beginning of July so I'll know for sure then.
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07-24-2025, 06:33 PM
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#16 | |
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Quote:
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07-25-2025, 09:41 AM
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#17 | |
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Quote:
I bought a diff out of a ~2014 IS250 RWD and installed my OS Giken LSD into it, pretty simple swap!
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07-27-2025, 08:08 AM
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#18 |
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Rust bucket enthusiast
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I second the 3.73. it's called the m85, I have sold a couple on here- you need to remove the axle stubs, and most of them could do with a new breather (easy to find and cheap)
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Turbo FR-S Build - Build Thread
JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block |
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07-27-2025, 09:15 PM
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#19 | |
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Oh, interesting. Mine was Y32 I believe and had no stub axles to pull. I definitely second the tip on the breather, mine was clogged and smashed.
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07-28-2025, 01:17 PM
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#20 |
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Join Date: Jul 2020
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Calcs
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Forum not letting me upload the calculations |
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08-13-2025, 05:52 PM
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#21 |
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Senior Member
Join Date: May 2015
Drives: 15 BRZ, 2003 MR2, '70 Elky, 06 TBSS
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Used 3.7 direct swap with a good diff seemed almost impossible to find, just switched the ring and pinion in mine to 3.7, still no traction until 70
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