Quote:
Originally Posted by Z U L8R
most people crack manifolds because 1. they have a big ass heavy turbo and they could really benefit from making a little support bracket (ps i don't have one) but most importantly 2. they don't have a flex pipe in their down pipe, which i've found is the biggest reason for blowing the manifold to turbo gaskets. i've never cracked a manifold and i've always used flex pipe in my down pipe. good luck
Dave
PS, people act like getting a hairline crack in a manifold is the worst thing on the planet....it's not the end of the world to take it off, get the crack welded, and come up with a way to prevent it in the future.
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flex pipe is taken for granted, I would hope everyone has one especially with a top mount in the dp section.
It is the worst thing on the planet if you have to take it out every two months.
Why not just invest in a good quality tomei manifold, if you having heat soakissues due to your aftermarket manifold once again the high chromium content of the steel in the cheapo manis does not exchange heat as well and gets red hot much faster and with less timing on the map then the mild steel or 304 stainless pieces.
Im sure theres a lot of people who have gotten away with it because their cars are properly tuned. Most peoples cars are not properly tuned and often times exaust temps are sky high in very irregular ranges of the map due to this which exacurbates underhood soak of the crappy steel and turbo as well as promotes a situation for cracking.
I wrapped and wrap cast manifolds all the time without issues, but a good manifold with the right steel and thickness should not be causing overheating issues in your bay if everything is tuned and put together properly.
Now a race car with a mild steel manifold (like the DSG car) is a different story and an application where this stuff i great.
Im not bashing wrap, I just dont do it to shitty manifolds anymore. Ill wrap a cast mani, or a downpipe or pretty much anything else for that matter.
The other thing i reccomend is if something is getting hot in the bay wrap that with some DEI and Metal tape to hold it together. I wrap all my cooling lines and oil lines double with 1 inch header wrap then use metal exaust repair/ducting tape to really tighten it and tape it downn, then metal wire at the ends and middle to sinch it.