exhaust heat

[Duc]

at what temp in the exhaust manifold does damage accure to the turbo

 

[HBarlow]

If your engine is factory stock you have no reason to be concerned. If your engine is modified you should be more worried about melting a piston than damaging the turbocharger.

The previous ISB5. 9 in the HO version from 2004. 5 through 2007 was designed to run indefinitely at 1425-1450* egt. I have not seen figures in writing but believe it is safe to assume the ISB6. 7 is also safe at those temps. That's egt measured preturbo in the exhaust manifold.

 

[Duc]

the truck is an 03 with edge attitude. 4in banks exhaust, and k&n air. so at what temp would any damage accure

 

[HBarlow]

I can only suggest you don't allow egt to run higher than 1300* for any extended length of time. Climbing a long grade at 1300* is acceptable.

I ran my '01 HO/six spd at 1300* to 1325* a thousand times while pulling long hard grades loaded with a trailer. The truck has 350k miles on the odometer and never suffered any casualties as a result.

Some will say aluminum pistons will melt at 1300* but a piston heats and cools very rapidly with each power stroke. EGT measured at the exhaust manifold can be sustained 1300* and each piston only feels that heat momentarily.

 

[Bob4x4]

Also worth noting is that there are piston cooling nozzles spraying oil to help control piston temps