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Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

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Old 10-16-2015, 10:23 AM   #1
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Default A tranny option

The T5 bell housing. Steel version. Winds up rather easy to make.

Any gear set imaginable is available for the T5. I'll dig up the source shortly.

corky



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Old 10-16-2015, 10:29 AM   #2
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In for the trannies.
And the transmissions.
Moved to driveline/transmission section.
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Old 10-16-2015, 10:44 AM   #3
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Pictures of it installed on a T5 transmission? Cost? Will you sell everything to just drop it in a miata?
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Old 10-16-2015, 11:06 AM   #4
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Would you also make a provision for the ppf?
Every once in a while, something like this pops up on eBay, but I've never seen it actually in use.
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Old 10-16-2015, 01:41 PM   #5
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I was watching the youtubes recently and I saw a bunch of 2000+ hp skylines. They seemed to be generally beating the **** out of their drivetrains with no ill consequences, which caused me to raise an eyebrow slightly. I was wondering how come these guys have such an easy time throwing together a transmission that can take apparently infinite horsepower so I looked up the site (shep transmissions) that was making them and it seems they sell 20-30k sequential transmissions for skylines, evos, etc. Obviously 20-30k for a transmission is ridiculous for anyone on this forum, but none of us is shooting for 2k hp. Or paddle shifting. Or 4 wheel drive. Etc. I just feel like there should be some sort of middle ground between "glass shitheap" and "moon rocket" in terms of tranny options.

What ever happened to those quaife gearsets? I remember there were a bunch of guys getting them like 5-10? years ago and when I came back to the forum, they had pretty much vanished and become rare like unicorns. I googled and no recent mentions of them. I'm not saying that I would start running 45 lbs of boost if I had a drivetrain that could take it, but I totally would and so would everyone else here except maybe emilio. Search your feelings, you know it to be true.

That being said, I vaguely remember googling up some old posts by Savington (I think) about how this or that transmission ratio (pretty much all of them) was wrong and would make him slower around the track. And there was a huge argument over what ratios were best/good enough/bad for turbo/supercharged/etc miatas. Is this a factor in transmission availability- ie, everyone who is willing to pay the money for a stronger transmission wants it to be perfect in every way and also wants their own special snowflake gear ratios.
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Old 10-16-2015, 01:49 PM   #6
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Quafie was discontinued by FM for some reasons that aren't always clear.

Read the gearbox options and experiences thread for those posts by savington.
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Old 10-16-2015, 01:56 PM   #7
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There are options. You just gotta look for them. The bottom line is, I don't think there's some crazy deficit here, because even if you can have a 400wtq handling transmission, you would likely be at the limit of many other parts, chassis, and forget actually controlling that kind of power consistently and efficiently. That kind of talent is possessed by about 1% here.

So really, there's no big problem.

But different approaches, like this T5 solution that just might be figured out (I say this until I see several successful examples) are always pretty cool and appreciated by many.
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Old 10-16-2015, 01:56 PM   #8
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Quote:
Originally Posted by shuiend View Post
Pictures of it installed on a T5 transmission? Cost? Will you sell everything to just drop it in a miata?
This. And when will it be for sale.
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Old 10-16-2015, 01:58 PM   #9
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Idk, I think the transmission was the last big wall for big power stock motor cars. CTS-V, ford, etc rear ends have been working great for years. I'm very excited to see solutions appearing for stronger transmissions. I mean it only took 25 years
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Old 10-16-2015, 02:15 PM   #10
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Looks like it weighs about a hundred pounds!
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Old 10-16-2015, 02:52 PM   #11
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Quote:
Originally Posted by aidandj View Post
Quafie was discontinued by FM for some reasons that aren't always clear.
I get the impression that the problem was that the parts were breaking anyhow and the manufacturer wasn't standing behind them.

--Ian
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Old 10-16-2015, 02:55 PM   #12
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I drove a 5sp wide ratio Quaife 5sp Turbo Miat awith a 3.6 rear a few months ago.

My mind couldn't comprehend 45mph in 1st gear

It was also mind-bendingly slow with that gearing and only 200whp
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Old 10-16-2015, 02:58 PM   #13
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Quote:
Originally Posted by aidandj View Post
Idk, I think the transmission was the last big wall for big power stock motor cars. CTS-V, ford, etc rear ends have been working great for years. I'm very excited to see solutions appearing for stronger transmissions. I mean it only took 25 years
Yeap. As far as I know, if this was a kit for sale that allowed me to install a T5 into my miata by buying this "kit" and a T5, this would be the first transmission upgrade kit commercially available for the BP.
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Old 10-16-2015, 02:59 PM   #14
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Quote:
Originally Posted by codrus View Post
I get the impression that the problem was that the parts were breaking anyhow and the manufacturer wasn't standing behind them.

--Ian
That was my impression too. But no verification so I didn't want to spread rumors.
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Old 10-16-2015, 03:00 PM   #15
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Quote:
Originally Posted by codrus View Post
I get the impression that the problem was that the parts were breaking anyhow and the manufacturer wasn't standing behind them.
That's the story I heard from FM. The parts looked amazing, but didn't prove any more resistant to destruction. Some people pointed fingers at abstract, hard-to-measure things like flexing of the transmission case, but in the end, the whole project just went away.


But, yeah. We've got companies selling kits to install beefy differentials and axles, and we've had the ability to make 300+HP reliably on a stock block and crank for quite some time now. There are plenty of folks making less than this on the track for whom transmissions last about as long as a set of brake pads, and there's no really good off-the-shelf solution for that on the market right now.
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Old 10-16-2015, 03:01 PM   #16
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I hope a miata clutch can be matched to this with just a set of plates. Then I will feel a lot better about the twin disc I just got.
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Old 10-16-2015, 03:20 PM   #17
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I was going to say, I don't feel that 300-350whp is some sort of difficult to accomplish thing as far as engines were concerned. The main problem everyone seems to have with going higher than low 300s is that it turns transmissions into more and more of a wear item. I got the impression that the sky was pretty much the limit in terms of boost levels on E85, so long as you've got the injectors. So why don't we see more 5-600whp E85 miatas? There are plenty of 500-900whp evos running around.

It seems that everyone with the budget to fix the transmission problem throws their hands in the air and gets a used corvette or S2000 instead. Beyond a certain point, you just get tired of pissing into the wind.
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Old 10-16-2015, 03:28 PM   #18
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Quote:
Originally Posted by AlwaysBroken View Post
So why don't we see more 5-600whp E85 miatas? There are plenty of 500-900whp evos running around.
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Old 10-16-2015, 03:42 PM   #19
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Quote:
Originally Posted by AlwaysBroken View Post
I was going to say, I don't feel that 300-350whp is some sort of difficult to accomplish thing as far as engines were concerned. The main problem everyone seems to have with going higher than low 300s is that it turns transmissions into more and more of a wear item. I got the impression that the sky was pretty much the limit in terms of boost levels on E85, so long as you've got the injectors. So why don't we see more 5-600whp E85 miatas? There are plenty of 500-900whp evos running around.

It seems that everyone with the budget to fix the transmission problem throws their hands in the air and gets a used corvette or S2000 instead. Beyond a certain point, you just get tired of pissing into the wind.
Have you driven a 500-600whp miata?
completely serious question
I've driven a few 600whp AWD cars, and they get squirely on the street in 1-3rd gear. Now take away 1000lb and take away traction from 2 of the wheels, shorten the wheelbase by a big amount, and add suspension built for corners and not drag racing.

you know what you get? coolstorybro.jpg

PS: the 300-330whp cars around here spin 3rd with a 3.6 fd and r comps. I'm kinda wondering what the point of going faster is? Well, besides maybe freeway pullz lol
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Old 10-16-2015, 03:43 PM   #20
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Sounds like fun
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