Exhaust wraps
Exhaust wraps
(OP)
Since thread71-99579 is closed, I'm opening new one,
What about NA engines? Do they benefit anything having exhaust wrapped?
Cheers
Ziga
What about NA engines? Do they benefit anything having exhaust wrapped?
Cheers
Ziga





RE: Exhaust wraps
Mike Halloran
Pembroke Pines, FL, USA
RE: Exhaust wraps
For example:
I was calibrating some equipment on a dyno not too long ago, and running an engine slowly up to full load and back down as a post test. It was obvious on the engine run up that the peak power was higher and occurred at a higher engine speed than when I was reducing the load. When I was reducing the load, it was a flatter curve. The reason was that on the way up the temperatures were cooler, so the exhaust pipes were effectively shortened. On the way down when everything was hot, the pipes were longer. The exhaust wrap will have the same effect in that it can change the effective length of the pipes.
Reidh
RE: Exhaust wraps
Exhaust wrap has been covered extensively in several previous threads. From memory the bench racers were for it, but generally the consensus among the professionals was except for manifolds between head and turbo, or for getting the catalytic converter up to temp quicker, it increases corrosion for no real benefit.
It can help prevent intake charge warming in some cases, but so does wrapping the inlet air duct, and it does not corrode as a result.
It can help reduce heat transfer to other items, but so can a heat shield. The heat shield will not encourage corrosion.
It can help reduce noise ever so slightly.
Basically, except for some very specific problems, it does more harm than good.
Regards
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RE: Exhaust wraps
This preserves its enthalphy. High energy content of the exhaust gas can simply means that it will flow faster inside the exhaust pipe. With high kinetic energy of the exhaust gas, you can run the engine with higher valve overlap to pull in more air into the cylinder.
RE: Exhaust wraps
Rod