They also stress the crank, another reason not to use them on a road car.
Not sure but you can use the clutch and don't have to full throttle shift all the time. I think the box is probly more likely to blow before the crank as I think they're only rated to 250bhp. I don't thrash mine 24/7 for the sake of it only 25% of the time
I have a small rad oil cooler for it with oil filter and tilton pump which prob also helps alot. Having said that it's not my only car so only do about 1 or 2k miles a year in it, had it 7 years, change oil every year and not had it serviced yet... knock on wood.
Had lots of trouble with the paddle clutch though found it utterly useless on the road specially with 1st gear being so high. It juddered like hell and ate my flywheel after 4k miles. I find a normal heavy duty clutch much better for the road and probably much easier on the crank cos it doesn't bite so hard and fast.
Box and engine are out of my car at the moment so gonna send box off to steve at SWR to get it checked. He mentioned there's a weak area which can be replaced for a newer stronger part which I should probably do before I uprate my engine to very silly spec...