Stoddard producing new 914-6 heat exchangers, Appear to be high-quality factory reproductions |
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Stoddard producing new 914-6 heat exchangers, Appear to be high-quality factory reproductions |
campbellcj |
Feb 4 2015, 11:44 AM
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I can't Re Member Group: Members Posts: 4,545 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
Just FYI - sorry if this is a re-post. No affiliation other than being a long-time satisfied customer.
http://www.stoddard.com/sic-211-005-00.html (IMG:http://www.914world.com/bbs2/uploads_offsite/www.stoddard.com-21-1423071883.1.jpg) |
Maltese Falcon |
Sep 12 2015, 01:08 AM
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Advanced Member Group: Members Posts: 4,645 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Agreed, once the upper and lower stamped metal shells have been crimped in place; it's game over for holding the HB in a machining/milling operation. That is, if you really don't mind having all of the clamping dents in your once handsome $3,000.00 heater boxes.
Even while holding spec in hot welding jigs, if released too soon from the jig to cool down, primary header tubes move like snakes. Several normalizing techniques are used to bring back into spec, a slight amount of surfacing and all is well. Like Toolguy said, once the metal shells are on where do you place the hold down clamps ? Idea (IMG:style_emoticons/default/idea.gif) how about; QC the primaries after welding, then crimping on the shells. Example part that we build, the v10 BMW m5/m6 pulse tuned headers. We use welding jigs and then we bolt each header into cooling jigs. Final flange surface machining is only a razor thin cleanup. QC is just part of the job (IMG:style_emoticons/default/biggrin.gif) |
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