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Old 12-06-2011, 08:37 PM   #901
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Originally Posted by CrankyOldMan View Post
Oh my, I think I'm nursing a semi...

Does that mean that your "spare" gearbox will not be available anymore? Or is this the swap you had alluded to before?

It's like mathematical pr0n!

That's the biggest reason that I'm attempting my custom box: terrible acceleration from 15-20 mph because of the RPM drop from 1st to 2nd. I'm staying N/A for the time being, so I don't need these ratios, but it's great to know that there are now some real options other than buying whole used transmissions to scavenge parts. I'm assuming that the gears will come as a complete pair (roller bearings, synchros) sans hub?
It is the one I had mentioned, this should eventually free up my original case for your project.

I don't find the 1-2 drop to be that bad, because the total ratio in 2nd still allows for good acceleration - assuming you have done the xB FD or run 13" tires.

We are N/A, I would be less incline to search for gearing advantage if we had big power, all of this effort is to make up for a lack of power.

My area of expertise when it comes to transmission is pulling it out of the car. The kit came with six gears, input and output side for 3rd, 4th and 5th. No bearings, at least not in the form I am use to seeing them in, but they do look like they have a synchro on the appropriate pieces. (note the gear on the right of the image)

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Old 12-06-2011, 09:52 PM   #902
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We are N/A, I would be less incline to search for gearing advantage if we had big power, all of this effort is to make up for a lack of power.
Makes sense. But the final drive is for EVERYONE.
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Old 12-06-2011, 10:15 PM   #903
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Makes sense. But the final drive is for EVERYONE.
Right... What I was getting at is I would not worry about close ratios if I had Tq. But the car is geared to tall on its own no matter the output, you got to do something to pep it up. The FD is the quick and easy shot that gets you most of the way there.
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Old 12-06-2011, 10:57 PM   #904
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Originally Posted by Jason@SportsCar View Post
The FD is the quick and easy shot that gets you most of the way there.
Wait, since when does a full teardown and rebuild of a transmission fall into "quick" or "easy"?
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Old 12-08-2011, 01:45 PM   #905
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Yummy... More Jongbloed wheels. 13x7, 8lbs 5oz. Now which set goes on which car??? I think these might need to go on the 99.

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Old 12-08-2011, 05:13 PM   #906
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Just talked to our engine builder... They are taking the stock head/intake/TB I sent them and flow testing them to see how well the stock setup works. From that they will make a plan of attack to modify the head (withing the H Prod rules), and we will see what kind of power it makes with the new Jun cams.
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Old 12-08-2011, 06:05 PM   #907
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Old 12-12-2011, 12:42 AM   #908
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I'm curious to know if you've looked at the 3.941:1 FD ratio from the Corolla/1st gen Matrix C59 series? Still gives you near-stock, but just a bit more oomph in 1st/2nd. If you're interested in test-fitting it, I'm pretty sure the C59 I bought has one. I can't vouch for its condition as I haven't torn it down that far yet, but I plan on getting to it some time mid-Jan. Oh, and it has a 3.166:1 1st gear too, if that makes any difference.
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Old 12-12-2011, 02:33 PM   #909
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Originally Posted by CrankyOldMan View Post
I'm curious to know if you've looked at the 3.941:1 FD ratio from the Corolla/1st gen Matrix C59 series? Still gives you near-stock, but just a bit more oomph in 1st/2nd. If you're interested in test-fitting it, I'm pretty sure the C59 I bought has one. I can't vouch for its condition as I haven't torn it down that far yet, but I plan on getting to it some time mid-Jan. Oh, and it has a 3.166:1 1st gear too, if that makes any difference.
1st gear is pretty useless for road racing... Beyond pulling the car on the trailer and initiating movement, it is already not used.

If 2nd was any shorter the gap to 3rd would only get bigger, if anything I would like a taller 2nd, to reduce the RPM drop to 3rd.

With our 20" tires I will have to turn 7300rpm in 5th to hit 120mph with the stock FD, I am not sure I want to spin a stock bottom end much harder.
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Old 12-12-2011, 05:29 PM   #910
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1st gear is pretty useless for road racing... Beyond pulling the car on the trailer and initiating movement, it is already not used.
Aah, understood. I'm assuming that road racing does a rolling start, like oval tracks?
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If 2nd was any shorter the gap to 3rd would only get bigger, if anything I would like a taller 2nd, to reduce the RPM drop to 3rd.
And there's the bugger of it: 1st and 2nd pinions are part of the input shaft. You could in theory get much closer with a C60 gearset, but then you're either notching the frame (illegal for H stock?) or trying to rework a piece of hardened steel (expensive/near-impossible) to shorten the input and output shafts. Any chance you've contacted KAAZ about the option to make a one-off?
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Old 12-12-2011, 05:42 PM   #911
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Aah, understood. I'm assuming that road racing does a rolling start, like oval tracks?

And there's the bugger of it: 1st and 2nd pinions are part of the input shaft. You could in theory get much closer with a C60 gearset, but then you're either notching the frame (illegal for H stock?) or trying to rework a piece of hardened steel (expensive/near-impossible) to shorten the input and output shafts. Any chance you've contacted KAAZ about the option to make a one-off?
Yes, SCCA uses rolling starts for Club Racing. The Pace Car or Pole sitter will set the pace, depending the on the cars in the mix this is typically 50-70mph.

They actually just did a clarification this week which gives FWD Prod cars the same allowances as RWD to trim body/frame bits to fit alternative transmissions. So a swap could be done.

This should get us close enough, even if its not perfect, its way better than what we have had the last two years... At least on paper, we still have to get it on the track.

The trans and all the bits are now in the hands of our mechanic.
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Old 12-12-2011, 07:06 PM   #912
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I don't want to spoil the surprise, but I think I've cracked the source and specs for these. Could you confirm if I have the specs right?

3rd - 28:19 (1.474:1)
4th - 29:24 (1.208:1)
5th - 25:26 (0.962:1)
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Old 12-12-2011, 07:19 PM   #913
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Originally Posted by CrankyOldMan View Post
I don't want to spoil the surprise, but I think I've cracked the source and specs for these. Could you confirm if I have the specs right?

3rd - 28:19 (1.474:1)
4th - 29:24 (1.208:1)
5th - 25:26 (0.962:1)
I can not confirm that information... I never counted the teeth, and the parts are all at the shop.
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Old 12-14-2011, 03:56 PM   #914
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I think this may be a bit overkill for our build, but on the upside I think we have zero chance of ever using it up - and I know it wont end up looking like Garm's last clutch.

Looking forward to testing the new OS Giken Super Single race clutch.

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Old 12-15-2011, 12:15 AM   #915
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How much does the whole assembly weigh in at? Looks light.
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Old 12-15-2011, 12:37 AM   #916
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How much does the whole assembly weigh in at? Looks light.
On our postage scale the works was 16lbs 13oz. I think that is 1lb more than my aluminum setup from SPEC, but this is a lot smaller in diameter, so the moment of inertia should be very similar.
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Old 12-21-2011, 07:22 PM   #917
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Just picked up another trailer... 40' open, now we can haul three Yaris at one time.

The cool thing was 19mpg with it empty behind the Tundra, when we towed the enclosed the other day we only got 10.5mpg with it empty.

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Old 12-22-2011, 02:47 PM   #918
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and I know it wont end up looking like Garm's last clutch.
It is my wish never to see that again. Your new clutch looks real nice.
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