gte exheaust manifold, and downpipe Options

[frosty]

http://cgi.ebay.com/ebaymotors/mr2-Celica-...1QQcmdZViewItem


Does something like this seem like a good buy? I'm always "if-fy" on ebay stuff.

Just looking for opinions....

[1bwilson]

Go with a sotck 3sgte manifold and a KO or Berk downpipe.

Those will eventually crack and I hear the downpipe has to be ground down for the wastegate to open all the way.

[jgreening]

+1

recent thread for you

[Supersprynt]

+1

recent thread for you

Read my mind.

[frosty]

Hey, I appreciate it guys. Nice read on the thread you linked too.

I've always read where it's said manifolds built like this will crack, but never read a reason for it. My educated guess would be that due to the heat changes and the metal constantly expanding/contracting would cause the crack where as the stock cast manifold would do this less.

(still, they look cool lol)

This post has been edited by frosty: Nov 8, 2007 - 10:30 AM

[phattyduck]

Hey, I appreciate it guys. Nice read on the thread you linked too.

I've always read where it's said manifolds built like this will crack, but never read a reason for it. My educated guess would be that due to the heat changes and the metal constantly expanding/contracting would cause the crack where as the stock cast manifold would do this less.

(still, they look cool lol)

Thin-walled stainless (or, almost stainless like much of the chinese crap) is much weaker than a big cast manifold. When it gets hot, it gets soft and can crack/break. Heat cycling is also an issue (like you mentioned). It might be ok if you were able to keep the turbo support bracket, but I doubt it fits with a manifold like that.

The stock manifold with the turbo support and a wrapped/coated downpipe with a support would be your best bet for reliable performance. The questionable gains, extra engine bay heat (if not wrapped/shielded) and reliability issues just make most aftermarket manifolds not worth it.

-Charlie