Waking up a slightly old thread as I’m in exactly the same boat.
3rd gear gave up on my 240 PP S2 on track at a Lotus on Track day at Stowe - Silverstone.
I’ve had the car a matter of weeks only done 2k miles with a max 60 miles on track. The guys I bought it from have stepped up and helped out. I didn’t want to go back to stock so I’ve gone for the complete Kaaz set, and an oil cooler, and while it’s opened up a Quaife ATB LSD.
Is anyone else running the close ratio Kaaz set on the road?
Feels like it’s going to be busy… the ratios vs standard :
Gear Kaaz Std
1ST 2.923 3.166
2ND 2.188 2.050
3RD 1.706 1.481
4TH 1.364 1.166
5TH 1.167 0.916
6TH 0.916 0.725
FD 4.529 4.529
Do you know why?
I’m about to go chargecooled and get more power, so am already trying to save towards the inevitable new gearbox. Sincs / Essex have mentioned thinking about an LSD as well but I don’t want to spend a load on one if it will not be beneficial / may even be detrimantal!
Not wanting to scare you, but from what information I had when I broke my gearbox, the Kazz gearset is no stronger than the std one.
I had been in contact with Lotus Motorsport to ask their opinion on this and they sadly told me they broke all 3 sets they had in no more time than a std box. He did however sing the virtue of the shorter gearing.
In my mind you don’t really need the LSD till you go above 260hp but then it is really needed.
The oil cooler is certainly something any tracked Exige needs in my opinion and I would not run a yota gearbox without one now.
I have the Kaaz gear seat in my car although not the final drive. My car is NA, it’s epic! It is what it is…and that is short, on track I no longer need 2nd so much if at all on tighter corners as third finds cam almost immediately and that’s the story up through every gear but 6th, I love it. On the road tootling about in a 30 or 40 mph zone I’m easily up through gears into 5th and 6th and comfortably cruising. On the motorway, it gets loud…and thirsty. Not sure how helpful it is me being NA but I hope it helps Will.
Whether I’d use them on a supercharged car I just don’t know for sure. There are people more qualified than I to say but I’ve heard they’re no stronger than OEM also but it certainly looks stronger gear to gear. The Jubu looks stronger still and most would agree you’ll be hard pushed to find a failure. I can’t recall anyone on this site ever “proving” there to be a failure to date (I tend to zone out of certain power threads so I could be wrong) but either way I bet they are pushing 320+bhp so 240 shouldn’t really be an issue I would have thought. I intend to have JSRacing fit a cooler as I’m a very very busy boy on track and it’s starting to worry me even with such pitiful torque, I’d worry double if putting them in yours. Ade has Jubu and the JSRacing cooler and so far so good, we ding dong on track all the time. On a positive not, if you choose Jubu you will almost certainly get your money back on the Kaaz set, hell, I’d buy them as a spare lol.
Last thing, if you didn’t buy from new maybe this car has had up to 300bhp at some point and had those parts removed, which most of us would surly do…
Having read just about every thread out there for broken Toyota C64 gearboxes, and the various efforts to upgrade / replace / exchange for other boxes, the upshot was a pretty unsatisfactory set of alternatives.
I settled on a Kaaz set in the C64, based on my use of the car on road as well as track days, which cut out the dog box or sequential options. So having settled on keeping the C64 I chose the Kaaz set for reputation (I did read your comments Ade but balanced those against other more positive views), and partly (and subject to a pinch of salt) as they quote a higher torque loading.
I didn’t fancy the jubu option which pushes 3rd and 4th further up from 2nd, which is a big enough gap on the standard box.
Whether heat has a big impact or not, I can appreciate a shaft, or even the casing flexing under heat wouldn’t be a great place for gears under severe load anyway, hence the cooler.
I do look forward to some more power, so want to sort the box ready for that later. The Kaaz ratios are close stacked, and with the 4.529 final drive relatively short, so will have to think about final drive options later… again any experience out there of what options are available would be interesting.
In summary the conclusion I’m coming to is that we’re stuck with a box which even for lightly tuned road cars appears to be somewhat of a liability, without a reasonable price alternative?
More chats happened on the Audi box today, dummy engine for fitting will be in the workshop this week. Alternative Final drive is awaiting order as soon as we are 100% it goes in the hole.
I clearly wrote looked, did you misread or maybe misinterpret… Nothing I wrote was fact, you missed that big time… as its written all over the post. Did I mislead…it wasn’t my intention thanks.
Just had the news that the synchro on 2nd is completely shot and 3rd prob isnt much better. No gears broken but as the box is coming out anyway I was wondering if there was any progression on a conversion be it honda or audi.
I’m not 100% convinced by the jubu route but fear it may be the only option due to cost and time waiting for a conversion.
Jubu stuff is seemingly non existent at the moment, we’ve justed fitted Kaaz to our race 2-elevens and I’m waiting for more kits to come in about ten days, circa �1800 for a full gear set isn’t bad as its decent quality and at Silverstonevyou still have circa 500rpm left at the bottom of hanger and you don’t need 2nd gear which is good.
I am in the exact same position as you are (although on an Elise SC). Trying to find a Jubu kit and going that way after reading the entire thread…
After years of troubles with an Exige S1 Honda SC (driveshafts…) I went Toyota route for tranquility. Seems I still made a mistake though, some people never learn
