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Millin is right - the gains from staying in lift will far outweight the losses to having to shift a little sooner. Plus I almost never used 6th on my cars, I think this would be a great mod because in addition to stayingin lift your going to pull harder in each respective gear because of the change in reduction ratios.
 

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bickley said:
Hey Griffin, do you think this would affect your gas mileage? And what about strain on the engine? Do you think the Celica would last more than a year? I'm really interested in these but I don't know if I wanna shell out that kinda money yet, especially if it'll shorten the lifespan of my Celi.
During day to day driving a lower gear ration actually degreases strain on your engine by giving you a greater mechanical advantage in normal acceleration. The only thing that will be different is how much time you spend in lift, which will vary based on how often you are REALLY driving it. Remember guys, you dont HAVE to take a car to redline every time if durability is what conserns you.

So yes, assuming you only push yourself when you are racing I do not think this will have a significant impact on your car.

As for gas mileage, it probbaly wont be affected much with the exception of high speed highway cruising.
 

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t2000gts said:


it's like this, in 6th gear you're normally at 2500rpm for 55mph (or something like that) and that gives you the ~30mpg highway.

in 5th gear you're at 3200rpm at 55mph.

not bad, you're still getting 20+mpg easy.

but who cruises at 55mph? 70mph in normal tranny is 3200rpm, and in C-One it'd be 4000rpm...now you've got a noticeable difference. mileage would suffer more at a non-linear rate over 55mph.

i often cruise 75-80mph on long trips. forget it with the C-One, unless cruising 4000-5000rpm for hours at end is fine with you. bad gas mileage (would that even be over 20?) and more stress built up over the life of the motor.

so if you really really want it, it's doable. just don't take long trips or stay at 55-60mph on long highway trips and you can afford the drop in mileage.
You might be surprised at how little differnce that makes. Load isn't that hogh so you wont use that much more gas. I used to cruise at like 4500 RPM in my MR2 and still did well on the gas mileage.
 

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I think 700 labor might be a little optimistig. Your talking a complete tear down and rebuild on the tranny here, most shops charge 70 / hr or more and thats way more than a 10 hour job. I doubt it will be under 1K. I also don't see any syncros in the picture. Despite these facts I still thinkits probably worth it.
 
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