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Re: Flywheel question Posted by blacksheep [Email] (#301) [Profile/Gallery] (more from blacksheep) on Mon, 21 Nov 2016 20:12:06 In Reply to: Flywheel question, stephen mitchem, Sun, 20 Nov 2016 05:50:50 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Basically you have three choices, 2 easy, 1 not so. The easy choices are the stock 91-93 900 Turbo and the 86-90 9000 Turbo. Both fit the 91-93 900 Turbo flywheel. Both are 228 mm, but the 9000 has more surface area and stronger springs, offering a noticeable improvement. That said, I'm not certain it would be adequate to your stated HP goals.
If that is the case, you may require the later 9000 clutch/flywheel setup. IIRC this also requires additional machining of the flywheel for clearance issues. Landjet may be able to advise you or point you to someone else with experience.
I chose the 86-90 as it was a drop-in, as well as an upgrade. I did not lighten the flywheel, as Blacksheep is a daily driver and I live in a mountainous area. Given your indicated application of autocrossing, you might consider lightening your flywheel to improve throttle response.
You might also consider the wholesale replacement of the entire system. Not long after the slave/clutch replacement the master cylinder failed. I replaced the master and the clutch hose. I also rebushed the clutch pedal to remove play.
Once you have made your decision the challenge is to find parts.
Good luck, and keep us apprised of your progress.
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