 914-6 headers and heat exchangers questions |
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| mb911 |
 Sep 13 2016, 02:04 PM
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914 Guru  Group: Members Posts: 7,614 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest 
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Most of you know that I am in the process of building 1.625 primary heat exchangers for the 914-6 market.. Danny so kindly has lent me a pair of factory heat exchangers to use as a pattern.. The issue is that the heat exchangers when sitting flat as if they were mounted on and engine the exit flange is off of perpendicular square(word) by about 3/16" .. Both of them are.. So a better explanation would be if you are looking at that back of the car with the muffler off the muffler flange bolt holes do not look square across the back of the car..
We have been discussing this for a few weeks. It should be square imho and some ssis I just installed on a customer's car today do as well.. So the question is what is the general consensus? Either way is easy but square and level makes the most sense to me as all 911 mufflers are built that way.. |
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| fixer34 |
Sep 13 2016, 04:06 PM
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Senior Member Group: Members Posts: 1,311 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest
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QUOTE(mb911 @ Sep 13 2016, 03:04 PM)  Most of you know that I am in the process of building 1.625 primary heat exchangers for the 914-6 market.. Danny so kindly has lent me a pair of factory heat exchangers to use as a pattern.. The issue is that the heat exchangers when sitting flat as if they were mounted on and engine the exit flange is off of perpendicular square(word) by about 3/16" .. Both of them are.. So a better explanation would be if you are looking at that back of the car with the muffler off the muffler flange bolt holes do not look square across the back of the car.. We have been discussing this for a few weeks. It should be square imho and some ssis I just installed on a customer's car today do as well.. So the question is what is the general consensus? Either way is easy but square and level makes the most sense to me as all 911 mufflers are built that way.. I think the key to your answer is 'as if they were mounted...'. If you are just laying the factory exchangers on a flat surface without actually bolting them to an engine, I don't think the orientation of the muffler flanges will be accurate. Find an engine to bolt them up to, or make a solid jig that matches the 2 sets of cylinder head ports exactly and fabricate from there. If I recall, that was the problems with the first sets of Dansk heat exchangers that came out. I'm almost certain that the muffler flanges/holes on my factory set line up horizontally. |
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Posts in this topic
mb911 914-6 headers and heat exchangers questions Sep 13 2016, 02:04 PM
Steve :ttiwwp:
I have stock heat exchangers on my car n... Sep 13 2016, 02:09 PM raynekat If you're talking about the flanges that mate ... Sep 13 2016, 02:15 PM mb911
This what I am referring to although this is wi... Sep 13 2016, 02:28 PM
Luke M
This what I am referring to although this is w... Sep 13 2016, 04:36 PM mb911
This what I am referring to although this is ... Sep 13 2016, 04:41 PM mepstein I'm going to want to bolt on a m&k exhaust... Sep 13 2016, 02:46 PM JmuRiz
I'm going to want to bolt on a m&k exhaus... Sep 13 2016, 02:59 PM Dave_Darling The exhaust flanges have to mate with the muffler ... Sep 13 2016, 03:21 PM mepstein NOS M&K :D Sep 13 2016, 03:26 PM mb911 Guys remember I am Mr m&k in a former life.. J... Sep 13 2016, 03:45 PM mb911 I have several engines to mount them to along with... Sep 13 2016, 04:40 PM mb911 I guess to clarify. Look at the picture of the eng... Sep 13 2016, 04:44 PM Luke M
I guess to clarify. Look at the picture of the en... Sep 13 2016, 04:53 PM Steve The flanges should be parallel like your picture, ... Sep 13 2016, 05:35 PM mb911 Ok that's what I assumed however that's no... Sep 13 2016, 06:02 PM |
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