914-4 vs 914-6...heat exchangers, Trying to understand Dansk's price disparity |
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914-4 vs 914-6...heat exchangers, Trying to understand Dansk's price disparity |
horizontally-opposed |
Feb 25 2020, 11:32 PM
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#1
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Advanced Member Group: Members Posts: 3,432 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
Another thread got me to thinking about this, and I suppose my honest questions could be construed as an attack on a vendor (not intended), so it's probably better to move the conversation to its own thread.
These 914-4 heat exchangers in mild steel are $268 each: https://www.stoddard.com/022256091f.html These 914-6 heat exchangers in mild steel are $3675 a pair: https://www.stoddard.com/91421100500-sic.html It looks like a mild steel HEs for the 914-4 may or may not be available for $300~ per side while stainless-steel HEs for the 914-4 can be had for $1800~ a pair. Or less. What I am still trying to understand is Dansk's pricing for 914-6 HEs in mild steel. I get that they have an extra exhaust tube each, different head flanges, and more intricate heater boxes, but… (IMG:style_emoticons/default/blink.gif) Anyone and any company is welcome to weigh in with perspective so long as it's respectful. I converted my 914 to a 2.2 six a few years ago, and went with a set of used headers that were handy because I was already over budget and had a tough time justifying the price of -6 heat exchangers for a car I don't use all that often and can choose not to use in cold weather (I doubt I am alone in this). Of the current options, I am most impressed with mb911's stainless setup (expensive but seems like good value) and Dansk's mild steel setup (very expensive and does not seem like good value—unless, that is, factory appearance is critical). Here to learn… |
gereed75 |
Feb 27 2020, 09:07 AM
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#2
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Senior Member Group: Members Posts: 1,246 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
Every time this discussion comes up I wonder why no one has tried this “heat muff” method in conjunction with any of the less expensive headers readily available You only need some straight section of exhaust header to mate these to. https://www.ebay.com/i/153814316540?chn=ps&...rRoCzSUQAvD_BwE
These are used extensively on light aircraft, they come in a variety of sizes and can be adjusted to desired length with a pair of tin snipes. I have a single 10” long heat muff on my RV 6 experimental aircraft. It puts out a lot of heat. Enough to knock the chill off of a very drafty cabin in the below freezing temperatures common in winter at 10’O00 feet. Here is a much more sophisticated version. https://www.aircraftspruce.com/catalog/eppa...eat05-15249.php. (They must be good - they are “turbo”) No doubt in my mind two of these mated to the OE heat system would provide plenty of heat to defrost windows and knock the chill off of a cold cabin, which is what most of us need since generally these are not cold climate driven cars. They would not provide as much heat as the OEM design but when I turn on my stock six ones, I always end up just cracking the air diversion valves because generally the OE ones are way too hot. These small ones also would not interfere with access to the exhaust studs for installing the headers. And they are readily removable so you can inspect for leaks in the header, unlike a set of old OEM ones that always make me cringe when I fire them up, not being fond of sleeping the big sleep. |
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