right guys i baught my car (r33) with a japspeed cat back performance exhaust but running a sports cat and a sports cat, so have just purchased a de-cat and a performance downpipe of fleebay, but now just leaves the situation of the turbo elbow, is the standard elbow restrictive and what type of elbows are available, will i gain or lose power by adding a screamer, or is just a b=higher flow elbow available, thinking power NOT noise.
Heat wrapping the elbow and downpipe is a bad idea.
Yes, it probably will move the gasses that little bit faster but there will be a monumental amount of extra heat soaked up by the turbo. This leads inevitably to turbo problems and ive seen with my own eyes cracked turbo housings caused partially by heat wrapping the front section of exhaust.
Sell it to a few honda guys, they'll be mad for the extra 200hp it'l add lol!
I ran a zetec turbo for years at high boost with the turbo and exhaust and downpipe wrapped and it's still making 23 psi somewhere lol, so It's a bit subjective, The standard down pipe is shielded to a degree and so is the elbow, manifolds and exhaust Casings of turbo's do crack by there nature of heating and cooling even when no wrapping is present, so blaming the lagging totally on cracked turbo housings is not the whole story
Age, amount of boost, the map of the car all contribute to premature turbo life too,
I spoke to Turbo technics a while back about removing a snapped of stud in the exhaust housing on our gtst, the advice given was to just get it re-built as most housings are cracked if original and spark erroding it was un-economic, most of the turbo's they re-build get a new housing anyhoo.
I didnt totally blame it al on heat wrap matt, i said it was only a partial contribution to the problem.
Were dealing with a car thats nigh on 15years old so the effect of heat wraping the exhaust can prove an expensive mistake in cairtain cases.
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