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definately no more than 550 degrees C and that is post turbo or after turbo
mine is 315 at 110km/hr on 14lb's of boost and it is 550 on 17lb of boost at 170km/hr flat to the board riding the brake....

It will work to some extent but will be too small to be very effective or efficient.

Tony

That all depends on the design, quality and suitability of the materials and the quality manufacturing. Done properly either can do the job very well. A properly manufactured tuned length tubular...

I do mine every 5000 KM's or else every 3 months whichever comes first

The only factory turbo TD42's I've seen in GQ's have been the very limited production Safari Autech models....

For regular day to day use and reliabillity on an otherwise standard engine 14psi is about the limit. Correct tuning is very important for reliabillity when you modify an engine. A fully race...

Correct

tony