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Old 05-18-2021, 03:32 PM   #1
HiSPL
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Default M47 mods for better "feel"

I will need a clutch soon and will likely refresh my M47 while its apart. I need a first gear syncro for sure. What else should I do while its apart? Any easy or "have to do" mods while I've got it out of the car?

Use will be sporty daily driver. Just looking for a better feel and easier rev matching. No turbo, just a warmed up NA b230.
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Old 05-18-2021, 04:42 PM   #2
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The STS shifter bushings are a good idea. Bronze and delrin. Makes the shifter more solid and minimizes the slop. A 164 engine mount as a heavy duty transmission mount also helped with shifter feel on mine.

It might be hard to find that synchro unless you have another gearbox for parts.
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Old 05-18-2021, 04:50 PM   #3
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If you can handle the vibrations, replacing the shifter cage bushings with something other than blown out rubber really helps too.

You can also rebuild (re-pin) the shifter u-joint thing if it has a bunch of slop.
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Old 05-18-2021, 04:58 PM   #4
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The shifting rod coupler on mine had a lot of play. Replacing that made a world of difference.
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Old 05-18-2021, 05:06 PM   #5
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The shifting rod coupler on mine had a lot of play. Replacing that made a world of difference.
Are you talking about the u-joint part, or the fork that goes around the bottom of the shift lever?
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Old 05-18-2021, 05:29 PM   #6
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Are you talking about the u-joint part, or the fork that goes around the bottom of the shift lever?
I suppose you could call that the u joint.

its part that has the sheet metal sleeve you have to remove to pull the dowel pins out of.
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Old 05-18-2021, 07:17 PM   #7
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That coupler cover sleeve is no longer available. So be careful not to ruin it when replacing the oring in the coupler and checking it for play. I second the trans mount upgrade to the 164 mount. That works very well and your shifter won't jump around anymore.
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Old 05-18-2021, 08:34 PM   #8
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Solid.

I grabbed some Diesel motor mounts the other day on facebook. That and the 164 mount will be as stiff as I'd want it I think.
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Old 05-18-2021, 08:42 PM   #9
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replacing worn parts makes it really good again. ymmv, but i found oem shifter parts fit better and felt better than sts stuff
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Old 05-19-2021, 06:19 AM   #10
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I put the brass bushing from sts in mine feels great! much more precise feel but i mean the best mod would be a cd009
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Old 05-19-2021, 09:23 AM   #11
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I put the brass bushing from sts in mine feels great! much more precise feel but i mean the best mod would be a cd009
CD009, T5, Getrag, etc. All would give you easier access to new synchros and other rebuild parts. But I have a feeling that it would be going a bit too deep down the rabbit hole for a mild NA B230.
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Old 05-19-2021, 12:56 PM   #12
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Originally Posted by spock345 View Post
CD009, T5, Getrag, etc. All would give you easier access to new synchros and other rebuild parts. But I have a feeling that it would be going a bit too deep down the rabbit hole for a mild NA B230.
Yes. The whole point of this car is to keep it uncut and use stock stuff.

If I put in a T5, well I might as well drop in the B6304 because I already have the adaptor, etc, etc.....


One of these days I'll find the perfect 242 shell to build the hot rod of my dreams. Until then I'm just gonna commute in this 244.
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Old 05-19-2021, 01:56 PM   #13
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see if you can get a Homer short throw shifter, they are nice
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Old 05-19-2021, 02:29 PM   #14
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see if you can get a Homer short throw shifter, they are nice
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Old 05-19-2021, 03:01 PM   #15
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Originally Posted by philski o'flood View Post
see if you can get a Homer short throw shifter, they are nice
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They are nice. Also, don't be afraid to make your own, it is pretty darn easy. Just a short section of 1/2" rod or a bolt and a welder, iirc.
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Old 05-19-2021, 03:14 PM   #16
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I seem to recall that the case would flex when hit with quite a bit more power than stock and (can't remember which) gears would move apart far enough to start stripping teeth off one (or both).

I wondered if an external steel girdle might provide support to prevent the above happening.

But this probably no concern for HSPL's stockish setup.
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Old 05-19-2021, 03:16 PM   #17
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I seem to recall that the case would flex when hit with quite a bit more power than stock and (can't remember which) gears would move apart far enough to start stripping teeth off one (or both).

I wondered if an external steel girdle might provide support to prevent the above happening.

But this probably no concern for HSPL's stockish setup.
Lulz. My 112 furious horses are going to rip that case apart!
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Old 05-19-2021, 03:48 PM   #18
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I think hiperfauto will have the syncro.
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Old 05-23-2021, 09:11 AM   #19
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For what it's worth, I've never missed a shift with the stock setup in almost 10,000 miles of road racing.
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Old 05-23-2021, 09:46 AM   #20
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For what it's worth, I've never missed a shift with the stock setup in almost 10,000 miles of road racing.
That's cool.

I set the lap record on the nurburbring with stock 14" steelies and Eco tires.
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Old 05-24-2021, 10:17 AM   #21
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That's cool.

I set the lap record on the nurburbring with stock 14" steelies and Eco tires.
I didn't realize that was a recognized category. You're going down.
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Old 05-24-2021, 01:19 PM   #22
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Bring it!

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