I was talking with Rick and Dave the other day -- wrapping the exhaust might give you better spool times, but will eat in to your max power. It's a trade off like everything else, and if you aren't upgrading the turbo, I wouldn't wrap the pipes.

I don't plan on wrapping the pipes for my twin setup, as the 408 spools up the turbo right quick and wouldn't wrap for anything smaller than a GT67 on a 5.3, GT76 on a 6.0, GT42-88 on a 408.

 

Why would it eat into to your max power?
BTW, I have mine wraped....

 

Because the turbine housings are sized based on the projected heat from an unwrapped pipe. Wrapping your pipes ups the heat. It's the same as down-sizing your turbine housing. Less lag, but less max power.

 

I'm fallowing you, but I would have thought it would have been backwards. More heat = less dence air = larger exhaoust housing....

 

More heat = less density, true enough, but more pressure, just as a decrease in volume, and since the turbine runs off the pressure differential, more heat = smaller turbine

 

I think wraping is imperitive in a rearmount setup, especially if you're driving it on the street. It's a fact that there is a ton of heat loss from all the piping, especially in EC and CC truck situations. Wrapping the pipe only helps to retain some of the energy that you would have in a front mount scenario. I would think wraping a front mount would cause some concern for max power, but not in a rear mount situation. IMO wrapping a rear mount only puts it on par with a front mount as far as spool time, but with the ability to have less back pressure.

 

I agree. If your concern is to only make more power, then I think wrapping the pipe and increasing the A/R to decrease back pressure, might gain you a little, but would spool very similar as an unwrapped setup.

But as for just wrapping the pipe, I don't believe it will actually HURT power at all. Instead of that energy being lost though heat dissipation though the pipe, it would just be by-passed though the wastegate.

 

I'll let you guys argue it out with the guy that invented rear mount turbos

 

LMAO

Well I'll keep this new info in mind when I go back to the track and really start pushing the GT-67....

 

I was thinkin about wrapping or ceramic coating the exhaust on my truck. But for me there not much spool time. Another thing I notes, I put a flowmaster in front of the turbo and the second day it was starting to burn the coating off it. LOL