A better C64 Transmission - Page 7 - LotusTalk - The Lotus Cars Community
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post #121 of 250 (permalink) Old 11-24-2015, 12:44 PM Thread Starter
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When you say half-shafts are you speaking of axles? They are FAR more robust than the transmission. I've broken a couple in 10 years on our XP car but that is from repeated drag launches on slicks at Pros. Axles are quite good.


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post #122 of 250 (permalink) Old 12-12-2015, 08:33 AM
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Subscribed. I look forward to seeing this in action next Auto-X season and maybe a reasonable upgrade next winter.
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post #123 of 250 (permalink) Old 12-28-2015, 10:39 PM
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Originally Posted by LionZoo View Post
Hi Fred,

I didn't notice this thread the first time. I'm very interested in knowing why you've decided to keep the stock synchros. My 2nd gear synchro is about to go, and it seems that the 2nd gear synchro is a pretty common failure point in these transmissions. Do you believe that the changes to gear spacing will put less stress on the synchro and keep it from failing?

How many miles have you put on your 2011?
...recently replaced my stock trans with MWR 3.9:1 transmission...

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Last edited by sleepe; 12-28-2015 at 10:47 PM.
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post #124 of 250 (permalink) Old 02-05-2016, 06:15 AM Thread Starter
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Quick update! Back on track with plans to build and install test box this weekend.
We're going to be doing the these gearboxes on a core-charge swap basis. This way you can keep your car on the road as long as possible, swap out the trans and send us the gearbox back as a core. Alternatively, you can keep the stocker if you like, just pay the core charge.

We should have pricing very soon!

Until then, how about a comparison of stock vs our ring gear?
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Last edited by fzust; 02-05-2016 at 06:23 AM.
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post #125 of 250 (permalink) Old 02-05-2016, 07:03 AM
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Beef! Neato.
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post #126 of 250 (permalink) Old 02-05-2016, 02:26 PM
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Wow !

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post #127 of 250 (permalink) Old 02-06-2016, 05:53 AM
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Quote:
Originally Posted by fzust View Post
We're going to be doing the these gearboxes on a core-charge swap basis.
This just got interesting. I have a c60 core thats doing nothing right now....

"Give a man a match, and he'll be warm for a minute, but set him on fire, and he'll be warm for the rest of his life."
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post #128 of 250 (permalink) Old 02-06-2016, 06:20 AM
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Originally Posted by fzust View Post
When you say half-shafts are you speaking of axles? They are FAR more robust than the transmission. I've broken a couple in 10 years on our XP car but that is from repeated drag launches on slicks at Pros. Axles are quite good.
As someone that has broken quite a few ring gears and axles I'd much rather have a strong gear box and use the axle as a circuit breaker. Those are fairly easy to replace and get you back in the race.

Quote:
Originally Posted by fzust View Post
Quick update! Back on track with plans to build and install test box this weekend.
We're going to be doing the these gearboxes on a core-charge swap basis. This way you can keep your car on the road as long as possible, swap out the trans and send us the gearbox back as a core. Alternatively, you can keep the stocker if you like, just pay the core charge.

We should have pricing very soon!

Until then, how about a comparison of stock vs our ring gear?
I sure wish these were SP legal.
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post #129 of 250 (permalink) Old 02-06-2016, 12:39 PM
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Originally Posted by fzust View Post

Until then, how about a comparison of stock vs our ring gear?
Wow. Gives new meaning to the phrase "beefy fillet" Seriously that is a stout looking profile.

because racecar
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post #130 of 250 (permalink) Old 02-07-2016, 12:54 PM
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Tranny options

Now I have two options I know what I'll be doing with my C64 when I pull it to put in the E153 I had built. BTW this E153 has a set of close ratio KAZ gears and the 3.9 FD which made it very close to the C64 in spacing and total range. Each of the first four gears is slightly taller and the 5th is just a bit short of 6th. I think it will be fine for road courses.
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post #131 of 250 (permalink) Old 02-07-2016, 01:19 PM
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Price yet?
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post #132 of 250 (permalink) Old 02-13-2016, 09:13 AM
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Garage
I want to run this transmission with the C65 4.312 final drive, the C60 0.725 6th gear and 245-40-17 tires.

This should yield @ 8500 rpm:

1st: 61 mph <- NICE
2nd: 84 mph
3rd: 112 mph
4th: 136 mph <- won't have to shift to 5th in the quarter mile
5th: 157 mph
6th: 200 mph (yeah right!)

Cartest reports the following (@ 410hp):

0-60: 2.45 seconds
0-100: 6.15 seconds
0-130: 9.66 seconds
0-150: 13.05 seconds
Quarter mile: 10.62 @ 135.92 mph

It's the golden ticket
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post #133 of 250 (permalink) Old 02-13-2016, 12:39 PM Thread Starter
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I know I keep saying "soon" on the pricing. I have the test box nearly together. I keep getting screwed by snap rings. There are about 12 different snap rings with literally 12 different thicknessess. I should have them Tuesday and in the car soon thereafter. I need to get some idea of interest, which requires getting the pricing out there....


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post #134 of 250 (permalink) Old 02-18-2016, 01:18 AM
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Which one is your final drive gear?

The lower one, right?
Why do you grind this with so much stock on flank and without any protuberance?
What about tip relief? chamfers ?
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post #135 of 250 (permalink) Old 02-18-2016, 04:44 AM Thread Starter
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The lower one is ours. It was a regrind of the proto to fix it, hence the lack of chamfers. Production one will be chamfered.


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- Larini Exhaust - BWR Close Ratio Gearset
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post #136 of 250 (permalink) Old 03-09-2016, 04:06 PM
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Any update on these being available and pricing? Trans is out and need another one to put in. Right now E153 is really the only option until this is available

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post #137 of 250 (permalink) Old 03-09-2016, 04:12 PM
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Me too! I just rebuilt mine to stock Toyota spec but plan on breaking it every chance I get....hopefully less than parts plus labor for a standard rebuild as it is not that hard of a diy job if your handy.

2005 Elise, Graphite Grey (soon to be nightfall blue), Ohlins DA, VF2 SC, Volk wheels, LSD, and pretty much everything else on this lemon.
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post #138 of 250 (permalink) Old 03-09-2016, 04:46 PM
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Trans is on the garage floor. Trying to decide between rebuild, MWR and if this would be an option.

Last edited by tpearsall; 03-10-2016 at 11:03 AM.
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post #139 of 250 (permalink) Old 03-09-2016, 05:12 PM
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Trans is on the garage floor. Trying to decide between rebuild, MWR and if this week be an option.
DITTO, MWR E153 or this if it is actually an option.

2005 Lotus Elise - Storm Titanium
BoE Rev400TVS SC, MWR E153 Trans, ACT HDSS Clutch, 2bular Full Exhaust, Ohlins Double Suspension, BoE Catch Can, BoE TOC Oil Pan and so forth
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post #140 of 250 (permalink) Old 03-09-2016, 06:03 PM
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I was in the same boat I went E-153 remember even though the gear box is stronger it's still the same size clutch. The E-153 has a bigger clutch that was my deciding factor well and this better C64 still not being available
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