What Gearbox To Use? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 03-01-2005, 02:48 AM
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this is for a 500hp rotory powered 1976 320A.

i need some advice on what gearbox i could fit. the car is auto atm.

if you could provide top gear ratio with any suggestions that would be great as i want to gear it to top out at around 300kph. or just shy of 190mph

this is a project that im starting shortly. first the body then the mechanicals. i want to figure out all the stuff im using first so that once the body is done i dont have to respray the thing again.
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#2 (permalink) Old 03-01-2005, 08:00 AM
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If you are using a Rotary, you should be asking this question of Mazda tuners.
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#3 (permalink) Old 03-09-2005, 02:24 AM
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well, the s5 rx7 box is the strongest box that the rotory guys have, short of a dog box. and that box will only JUST hold the power, the moment i bolt on slicks and race it - by by box. just thought that with BMW having such torque and a reputation of over engineering stuff, that thy may have a box that would hold the power. i dont want to go to a dog box if i can help it.
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