Close ratio gears
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Joined: Oct 2011
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From: lincolnshire uk
Close ratio gears
So the car is onto phase 2 now which is getting it a little more track focused, I have a c2 to a mix of rs and cup spec. Fully rebuilt, balanced and ported etc with cup cams and still running standard intake and rev limit. I need an idea of what ratios to use to get a good improvement on a variety of tracks. The car does see a lot of road use so don't want to change 5th too much. I know what I want is always going to be a compromise but oh well. Help pls! Jim.
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From: Loveland, CO
What gearbox is in the car right now? There were several different type numbers used on the various 964s over the years. If we have a solid starting point, we can best guide you. Redline RPM, rear tire size, and an idea of your power curve/how the car is cammed for performance always help as well.
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From: lincolnshire uk
Thanks for the replies. The car has a g50 03 I believe, standard row c2. Standard rev limit which I think is 6700. The engine is totally fresh, gas flowed and balanced with a standard intake and cup cams. 255 rear tyre size on cup ones. The cams have moved the power up a bit which has highlighted the leggy gearing. Which I thought the weight loss would have made up for but I think a new gear set will really wake the car up.
I do use the car on the road a bit so don't want it to be revving it's nuts off at highway speeds but the car was built with track days in mind. I am aware there will be a compromise. I had thought about making 1st and 2nd a bit taller and bringing fourth shorter but have no practical experience as to what this will mean in the real world!
I do use the car on the road a bit so don't want it to be revving it's nuts off at highway speeds but the car was built with track days in mind. I am aware there will be a compromise. I had thought about making 1st and 2nd a bit taller and bringing fourth shorter but have no practical experience as to what this will mean in the real world!
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From: lincolnshire uk
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