Quote:
Originally Posted by GySgtFrank
Good info. This has been my experience with header wraps as well. Headers rust away fast enough on their own if uncoated. Wrap them and they last maybe a quarter of the uncoated header lifespan. It's interesting that the same type of degradation can be seen with turbo bags. I would have thought the cast iron would have stood up to heat soaking better than that. Guess not, thanks for the heads up.
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No worries, I always wanted to prove that TURBO BAGS are fucking shit, and as you can see they 100% are
I suppose like I said in my first post if you are a show pony or drug racer or generally some fagot who does not actually use the power of your car often then you may find that "nah man, bags are fine, never ever had a problem" you will only never have a problem if you do not use the power (I.E. Generate enough heat!@ consistently) to degrade the housing.
My last housing was a 1.00A/R twin scroll size, and it was on for a few thousand km until it became a restriction and I swapped it out, it ran a bag but because the power level was low and not as much true proper high speed testing was done it did not look this bad. It takes BIG POWER and repeated power after power runs to accumulate the "heat" in the housing and not let it dissipate to over stress the housing. (NOTE: one or two consecutive laps on a low speed track racing for a plastic trophy!! is not high stress LOL) Its just proof of how hard I run my set ups in the name of true proper endurance testing
and in that environment BAGS are a KUUUUUUNT!
Quote:
Originally Posted by silverfdturbo6port
I've used bags and wrap n street machines for many many years with no issues. Even with drag racing, autocross and numerous 180+mph pulls on 100* days I've never seen them "BDC" nor myself turn into a "KUUNT" but those are not harsh conditions like a race car as stated by Peter.
But for a dedicated "Race" car I will guarantee you will see the effects like in the OP.
But for daily driving/street use and you want to keep the bay temps down then Bags, wrap, shielding, heat coatings all work great.
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It's a function of power, restriction, retained heat, time used at high power.
Anyone familiar with FD3S twin turbo systems who has used them at high power (1.5bar boost @ ~400bhp or so) and over a huge length of time (say 50,000km+) will attest to the similar degradation of manifolds and turbine housings (non insulated!)
If you are making lower power, use it less frequently, have larger housings, turbo's etc all of this simply means you have less if ever any likely hood of seeing such things
*If you are making the power (with associated heat input!)
*Use it often and at high duration
*Even on a T4 platform with the biggest housing you can run and super low restriction outlet *see proven tests* you will fuck the housing if you insulate it... proven.