Chassis stiffening - which parts are good? - Page 10 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-04-2009, 09:33 AM   #181
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OK, I skimmed over about 6 pages of this thread, so if my question has already been brought up, please direct me toward it's location.

Has anyone thought about using that 2-part foam that adds ridigity to open voids like frame rails and under the door sills?
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Old 11-04-2009, 01:40 PM   #182
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the only thing I would be concerned with about that foam... I think it would trap moisture and promote rust.
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Old 11-04-2009, 01:47 PM   #183
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I think about it all the time.

They make an expensive enclosed cell foam that doesn't trap moisture.

I definitely would advise against any open cell product. You also want to make sure it's got the right strength. There was a thread on it not too long ago.
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Old 11-16-2009, 01:17 PM   #184
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OK guys. I've noticed I have issues with changing gears at higher RPMs in higher gears..mostly the 4-5 shift and the 5-6 shift. It's like I have to let the drivetrain settle before making shifts from WOT. I'm assuming it's because the driveline is torquing over. Although I do have the Mazdacomp engine mounts i'm assuming because the diff. bushings are stock I'm not taking full advantage of the motor mounts. So I was looking into other bracing (being hopeful of coming across that Carbing transmission brace) and saw this from Beatrush.



Anyone think this would be helpful? Maybe along with the PPF brace?
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Old 11-16-2009, 02:01 PM   #185
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Haha look at those gray pieces all bent up.
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Old 11-16-2009, 02:40 PM   #186
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Get some decent bushings before bolting a bunch of crap to your car.
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Old 11-16-2009, 03:05 PM   #187
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Quote:
Originally Posted by triple88a View Post
Haha look at those gray pieces all bent up.
Haha, that is how they are supposed to look...
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Old 11-16-2009, 03:20 PM   #188
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Quote:
Originally Posted by Doppelgänger View Post
OK, I skimmed over about 6 pages of this thread, so if my question has already been brought up, please direct me toward it's location.

Has anyone thought about using that 2-part foam that adds ridigity to open voids like frame rails and under the door sills?
The stuff to use is made for the auto industry. Some manufacturers use it. It's been discussed here an on other miata forums. Seam welding is the winner but the most intensive to do.
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Old 11-16-2009, 09:24 PM   #189
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I've seen what some of the competitive time attack cars in japan are doing and I can't rememeber the team names, but some successful teams were seam welding and using the foam with some crazy fast cars
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Old 11-16-2009, 10:21 PM   #190
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Yeah IIRC the Infinity Q45 used the foam in its rails, the two-part urethane type.

I vote you try stiffer bushings first DTD.
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Old 11-16-2009, 10:22 PM   #191
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Yeah IIRC the Infinity Q45 used the foam in its rails, the two-part urethane type.

I vote you try stiffer bushings first DTD.
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Old 11-16-2009, 11:23 PM   #192
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Quote:
Originally Posted by GIGAPUNK View Post
Get some decent bushings before bolting a bunch of crap to your car.
Really ******* helpful there *******. GFY unless you want to come over here and drop the whole ******* diff and replace the bushings.
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Old 11-16-2009, 11:27 PM   #193
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Quote:
Originally Posted by kotomile View Post
Yeah IIRC the Infinity Q45 used the foam in its rails, the two-part urethane type.

I vote you try stiffer bushings first DTD.

I'm looking to get some results without pulling the diff as that is a low-priority job. It's easier to bolt up a brace or two. I'd rather spend 1/6th the time and net 1/2 or better positive change. I really want that Carbing brace though. Also, since my car is the daily, I don't think I want the NVH from the HD diff mounts.
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Old 11-17-2009, 12:29 AM   #194
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Doppel, that carbing brace looks like a solid mount. It might have worse nvh than stiff bushings.
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Old 11-17-2009, 01:04 AM   #195
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The MMRs in my diff carrier are pretty solid and the NVH is not bad at all, and that's with Sav's old clutch-type diff installed. Solid engine mounts OTOH, fuggiddaboutit, couldn't stand that.
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Old 11-18-2009, 10:33 AM   #196
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Yeah. Did I mention I really don't care to drop the ******* diff? What a PITA that is. I'd rather bolt something up and take it off if I don't like it... or just bolt it up when I need it's functionality.
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Old 11-18-2009, 05:19 PM   #197
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BTW, dtd, you mentioned the PPF brace, I think you mean this one from moss motors,
here Correct?

I've been told by a number of people its basically ****, and doesn't do much.
Ask SMR over yonder, he'll give you his 1st hand experience too. He's used a lot of these bolt on braces.

The carbing is a good brace, you can find it at autokonexion's site I think, still.

Also, try these guys for the carbing piece..
Fluid Motorsports
1115 Center St S
Tacoma, WA 98409
(253) 678-1999

K bi!

** actually, is this what you were looking for in the back?
http://www.empowermotors.com/product...iata-na6-8-973
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Old 11-18-2009, 07:53 PM   #198
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Quote:
Originally Posted by Doppelgänger View Post
Yeah. Did I mention I really don't care to drop the ******* diff? What a PITA that is. I'd rather bolt something up and take it off if I don't like it... or just bolt it up when I need it's functionality.
Yeah, I saw, I was just commenting on the NVH aspect. I agree dropping the diff is a bit of a pain.
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Old 11-18-2009, 09:05 PM   #199
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Quote:
Originally Posted by chance91 View Post
BTW, dtd, you mentioned the PPF brace, I think you mean this one from moss motors,
here Correct?

I've been told by a number of people its basically ****, and doesn't do much.
Ask SMR over yonder, he'll give you his 1st hand experience too. He's used a lot of these bolt on braces.

The carbing is a good brace, you can find it at autokonexion's site I think, still.

Also, try these guys for the carbing piece..
Fluid Motorsports
1115 Center St S
Tacoma, WA 98409
(253) 678-1999

K bi!

** actually, is this what you were looking for in the back?
Carbing Lower Arm Bar (Type II Fr): Miata (NA6/8) [CA-6824010T] - $224.30: eMpower Motorsports, www.eMpowerMotors.com
I'll check with those guys about the trans brace. But the one I pictured bolts to the rear subframe and to the PPF/Diff to reduce diff twist...and is appealing. Since my car is a 02 and a SE, it has rear bracing that not all Miatas have and that is suffucent so no need for a normal brace. I'm looking to reduce drivetrain flex.
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Old 11-18-2009, 11:05 PM   #200
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Quote:
Originally Posted by Doppelgänger View Post
OK guys. I've noticed I have issues with changing gears at higher RPMs in higher gears..mostly the 4-5 shift and the 5-6 shift. It's like I have to let the drivetrain settle before making shifts from WOT. I'm assuming it's because the driveline is torquing over. Although I do have the Mazdacomp engine mounts i'm assuming because the diff. bushings are stock I'm not taking full advantage of the motor mounts. So I was looking into other bracing (being hopeful of coming across that Carbing transmission brace) and saw this from Beatrush.


Anyone think this would be helpful? Maybe along with the PPF brace?
I have the Beatrush brace and it made a huge difference in shifter feel. I now hate my 6spd less.

https://www.miataturbo.net/forum/t26105/#post456407
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