N/A Supra Flywheel/Clutch Swap w/ part numbers and pics - Lexus IS Forum
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post #1 of 267 (permalink) Old 03-23-2010, 08:14 PM Thread Starter
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N/A Supra Flywheel/Clutch Swap w/ part numbers and pics

Alright, it's finally done! I can't believe how much of an improvement it is. The engine speed rises and falls faster and smoother. There is less vibration with this setup, and changing gears is smoother because it is easier to rev match. I wish I would have done this sooner. It is MUCH sportier than before. Anyway, here are the part numbers I used. I took pictures of the parts used to show you the difference, but unfortunately I didn't get the IS300 slave cyl. pushrod back. Not like I'll ever go back to that setup, but it would have been nice to show the difference.

The pressure plate, release bearing, pilot bearing, and rear main seal are the same parts between the N/A Supra and IS300. The flywheel and bolts, clutch, and slave cyl pushrod are different.

Here is the list of parts used with the corresponding part numbers. Then below that I show the difference between some of them.

N/A Supra flywheel 13405-46040
Flywheel bolts (X8) 90910-02103
Slave cyl push rod (from TT Supra) 31473-14030
N/A sprung clutch disc 31250-30391-84
Pilot bearing 90363-12002-77
Release bearing 31230-22101
Rear main seal 90311-90006
Pressure plate 31210-30261-84

There you have it. Genuine Toyota parts for an N/A Supra swap. Here is some more info:

Flywheel
IS300 weight 31.5 lbs, about 1 3/4" thick.



Supra 17.8 lbs, a little under 1 1/4" thick (hence the need for the longer push rod)



Flywheel bolts; you can see the difference in length. The shorter ones are for the thinner Supra flywheel of course.



Here is the longer pushrod. It's about 81mm.


And of course, a new sprung Supra clutch disc.


That's it! Straight bolt on, no modification required!
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Last edited by what it IS; 07-06-2011 at 03:49 PM. Reason: To clarify the push rod came from a Supra TT
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post #2 of 267 (permalink) Old 03-23-2010, 09:10 PM
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Have pricing for the swap available?
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post #3 of 267 (permalink) Old 03-23-2010, 09:14 PM Thread Starter
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Flywheel was $266. Clutch disc was $100. Flywheel bolts were about $75. Pressure plate was $105. Push rod was $9. Pilot bearing was $6, and release bearing was $54. Rear main was $30ish. A $600-650.

I also have to thank TeCKis300 and kponti for giving me all the info I needed.

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post #4 of 267 (permalink) Old 03-23-2010, 09:43 PM
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Thanks! Curious, why did you go this route rather than a Lightweight IS300 flywheel? They save another 3-6 lbs and a direct swap..
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post #5 of 267 (permalink) Old 03-23-2010, 09:58 PM Thread Starter
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I didn't want it THAT light. I wanted something kind of middle-weight. I don't like the feel of "lightweight" flywheels. Plus the local Toyota dealer is the shop that installed it, and since I am using Toyota parts they are giving me a 1 year warranty on everything.

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post #6 of 267 (permalink) Old 03-23-2010, 10:07 PM
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So you were able to get the extended rod from discounttoyotaparts?

'03 IS300 SD TCM 5-SPD LSD
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post #7 of 267 (permalink) Old 03-23-2010, 11:12 PM Thread Starter
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No, I got it from my local dealer.

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post #8 of 267 (permalink) Old 03-24-2010, 08:44 AM
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hmmm....this is something i might have to do....thanks for the parts list and the quick writeup.

2005 MSM Lexus IS300

Stock?
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post #9 of 267 (permalink) Old 03-27-2010, 08:53 AM
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I did some digging around with no luck... what's the holding torque of the N/A Supra clutch compared to IS300 stock?
Same-same?

I'm wondering if like the stock IS300 clutch, could the N/A Supra clutch be used for light FI?

Mitch
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post #10 of 267 (permalink) Old 03-27-2010, 09:58 AM
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This is perfectly what I need! Lightweight flywheels are too noisy for my liking, I can't wait to do this mod! Too bad I just got my clutch replaced 2k miles ago.

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post #11 of 267 (permalink) Old 03-27-2010, 01:34 PM Thread Starter
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Quote:
Originally Posted by mitch_1979 View Post
I did some digging around with no luck... what's the holding torque of the N/A Supra clutch compared to IS300 stock?
Same-same?

I'm wondering if like the stock IS300 clutch, could the N/A Supra clutch be used for light FI?
Holding torque: since the pressure plate and a lot of other parts are the exact same, and the other parts are interchangeable, I'd be willing to bet the clamping force is the same.

Sure, it could probably handle an extra 4 lbs of pressure, but I doubt much more. If you want to go F/I, don't plan on sticking with the stock clutch and tranny (at least for long ).

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post #12 of 267 (permalink) Old 04-01-2010, 03:55 PM
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looks great! love that you used all OEM parts

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post #13 of 267 (permalink) Old 04-01-2010, 05:48 PM
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+1 on the OEM parts approach.

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post #14 of 267 (permalink) Old 04-01-2010, 06:02 PM
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Do you have any clutch chatter in the morning or any problems with this setup at all? Smooth engagement all the time?

'03 IS300 SD TCM 5-SPD LSD
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post #15 of 267 (permalink) Old 04-02-2010, 06:12 PM Thread Starter
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No issues at all. No chatter, smooth engagement, straight butta.

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