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How long... how long is a piece of string!
Sandeep,
It's a kinda "how long is a piece of string" question.
I have seen stock Bug gearboxes used in drag racing rails (seriously!) last indefinatley and I've seen £3000 gearboxes blow on the first take off...
It just depends on how you treat it.
If you're running street tyres, you've less chance of breaking it than if you run slicks,
If you setup the rear suspension for drag starts (i.e. quite soft for good weight transfer) then the trans will last longer than if you set if up hard as it will take the shock out of the take off.
There are so many different things to look at.
As for power shifting, the same thing applies, if you slam your foot off the clutch having buried the accel pedal before hand, you're more likely to slip the clutch or shock the transmisison and break something than if you wait to get the clutch up fully and then nail it.
If you're nice to it, it should last! and last.
Rich Olafsson ran a stock 1300 box for 6 months with 240bhp from an Impreza Turbo lump but as you can't control the sudden turbo boost, it died evetually. He's pretty nice to it.
MG
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Modification is a form of art.
Performanceghia is still alive and kicking...
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