Re: 2 piece exhaust manifold

[Ken Keith <auditude@impulsedata.net>]

Maybe it would help to have the manifolds cryogenically treated.
This method apparently relieves internal stresses in the metal.

This is done to competition rifle barrels, and it improves 
accuracy and wear.

Ken
-- 
http://www.geocities.com/motorcity/garage/4153/

Phil Payne wrote:
> 
> In message <367B08C5.253BC883@impulsedata.net> Ken Keith writes:
> 
> > Can you expand on your criticisms of the Dialynx EM?  This is the
> > first I'd read about anything negative about them, except that
> > they sometimes warp once, and need to be machined.
> 
> They warp like wet boards.
> 
> John Robinson, Treasurer of the UK Club, had _two_ Dialynx manifolds
> warp on him, both times pulling the studs out of the block.  I believe
> he is taking legal action, but you'll have to check with him.
> 
> My own Dialynx manifold warped like a wet board and pulled out four
> studs.  Even now, I'm not sure it's not moving.
> 
> Jim Wallace (Club member, northeast of England) had the same problem.
> 
> Someone in the Area L meeting (whose name I didn't catch) last Thursday
> has the same problem.
> 
> The only happy owners seem to be those that don't drive their cars much.