The game has really moved on as regards snail power. I can well remember as a kid going to the Castrol 9 Hour at Kyalamy and watching the Ferrari 308 twin turbo struggle with turbo related issues. It was quicker than anything except the Joest Porsche 936 but it gave up the ghost after just two hours. This was in November when temps here are well over 30 degrees in Spring !
I recall the Porsche 935 with their KKK turbo's glowing red hot at night going down the main straight at Kyalamy , you cannot underestimate the impression that made on me as a motor sport obssesed 12 year old kid...
Do any of you remember the time Lotus entered Le Mans in the early 90's with their twin turbo V8 Lotus Esprite's ? Well I recall the amazment on the mechanics faces when the one car came in complaining of a lack of power, only to find the bonnet hinges had melted away and most of the one turbo was missing.
It had melted away from excessive heat , so I can only imagine the temps must have been right off the scale to cause that.
My brother ran a GTV 2litre NORD motor with a hybrid Garret T3/4 single turbo boosting 1 Bar in the late 90's. We one December day he and I headed off to Sun City with the outside temps approaching 40 degrees Celsius. After about 50 kms I notice my feet were getting seriously hot...then I noticed the under soles of my Reeboks had started melting into the carpet so I rode the rest of the trip with my legs folded off the floor.
We get to Sun City and the one security gaurd tells me "Sir your bonnet is bubbling"...I say "What ?" So I get out and look, and yes the paint was bubbling on the bonnet just above the turbo...
Engine temps was fine oddly enough.
==> definitely BANNED! 
