I was particularly thinking of the Fiat 124, and the Toyota pickup truck. The manifolds are nearly identical to the Spitfires.
Both used a cast iron upper manifold. Both used a twin tube lower pipe. Both used three nuts to affix the two to each other. Both used bell housing support straps as well. Yet neither of them have any problems with blowing out exhaust gaskets. So why does a Spitfire apparently have a problem with theirs? I don't know. Don't see enough of the Spitfires two piece manifolds over on this side of the pond to really judge. I simply find it peculiar and suspect there's something else involved in the problem, if there really is a problem. >>> "William Davies" <[EMAIL PROTECTED]> 07/23/03 12:08PM >>> Most of the other vehicles I've seen with similar downpipe arrangements use 4 fixing studs rather than the Spitfire's 3. The rigid exhaust mounting at the bellhousing certainly doesn't help, as it forms a convenient fulcrum point, with the exhaust acting as a lever between the manifold and the rear exhaust mounts. I have improved (but I would hesitate to say cured) the exhaust blowing problem by removing the mounting at the bellhousing. This allows the exhaust to hang freely with less leverage being exerted at the joint as the engine moves on it's mountings. The problem is too common (in my opinion) to be down to face matching. Those downpipes and manifolds I've examined on the bench have certainly been correctly aligned in all respects with good face-to-face characteristics, ----------------------------------------------------- The information contained in this communication may be confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication, or any of its contents, is strictly prohibited. If you have received this communication in error, please re-send this communication to the sender and delete the original message and any copy of it from your computer system. Thank you. ----------------------------------------------------- <<<<GWIASIG 0.07>>>> /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
