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When you get a clutch only go as high IRT clamping force as required.
To heavy a clutch pack will turn your gearbox into a fuse, bend forks and generally make the car horrible on the street in traffic.
IRT puc clutches (3,4,5,6), whilst they grip well, they will not last anywhere near a properly selected full face, I've had pucs, I would rather use a twin if I was making big power.
I am currently looking into a flywheel, clutch pack, fork, pivot and bearing for around 250nm atw.
Exedy stage 1 looks good for up to 275Nm atw.
This should suit a mild turbo or, more pertinent to me, a supercharger (I'm looking at the Harrop).
In saying that the clutch should hold the 300hp/250Nm, whether the gearbox and rods do is another question.
I am looking at grabbing a 17+ short block if I can find one, if not a long and just throw some slugs and rods in it.
Not alot I can do IRT the gearbox, apart from buy a spare and wait for the current one to lunch itself.
The budget for the boost build does make my 198hp atw NA build seem like exceptional value.
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