adjustable WG cap mod, & other incremental increases
Ken Keith
auditude at neta.com
Thu Jun 14 15:55:28 EDT 2001
On 14 Jun 2001, at 23:11, Gerard wrote:
>
> The main crack is all the way around, actually right where Audi seem to
> have put the join on the 2-piece EMs. The 2-piece is also not the
> be-all-and-end-all of preventing cracked manifolds. I sent my 1-piece in
> for welding as it had a hairline crack on the front piece near the join
> between the two halves and also had a crack on the vanes of the
> collector on the turbo end. This seemed to extend all the way through
> the metal.
The above story must be about a 2-piece, right Gerard?
> The odd thing is that I have another 2-piece EM and the thing has the
> same cracks in the very same locations. I suspect the other one arriving
> in the next week or so will have the same cracks.
I wonder if the cracking is caused by a temperature change upon
cooldown, warmup, or physical stress? All of the above, I would
imagine.
> > Maybe the warpage I've always seen referred to was the Dialynx
> > unit.
>
> I recall someone saying these warp, but don't crack. Much heavier than
> stock and apparently a real pain to install. The 2-piece is alot beefier
> than the 1-piece and I think the Dialynx is even thicker. I've never
> seen a Dialynx, just going on what I recall from list traffic.
I've seen pictures. I think maybe at the TAP website. I'd like to
see a group effort put forth to get some type of turbo header, or
tubular manifold. Apparently only certain materials can be used for
turbo manifolds tho', also due to cracking problems.
> I haven't even got a clue what iconel is. High nickel content cast iron?
I would imagine. It's what give the RS2 manfolds their light grey
instead of black color, as far as I know. To my knowledge, the
Dianlynx manifolds don't look the same color as the RS2 ones.
Anyone?
And another question. Would this cracking potential be any worse
if I lived in a hot area like AZ? Or are the temperatures or factors
that cause cracking problems for everyone?
OK, more questions. Would ceramic coating help the situation?
Thanks,
Ken
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