Posts: 1,235
That would be great. By the way, I had a customer insist on keeping OEM fans which were drawing 15 amps each when he was at my house. But that would trigger my overheat warning on my fan fail. He finally swapped to a vendors lower power fans and said his engine temps still stay in the green. He lives in Florida now also. So I don't think you need higher volume flow fans for the DeLorean.
Last edited by Bitsyncmaster; 07-23-2021 at 06:25 PM.
Dave M vin 03572
http://dm-eng.weebly.com/
Posts: 1,235
Location: Pittsburgh, PA
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My VIN: Yes.
Club(s): (DCO) (DMA) (DCUK)
Direct comparisons seem to be confounded by a combo of "lack of original part numbers", reliance on manufacturers specs, and anecdote.
For example: OEM -vs- Supplier1 -vs- Supplier2
Rather than: OEM -vs- Spal 30100364 -vs- Derale 16920
Then you add in owner's anecdotal tests w/out any standardization - OEM shroud / metal shroud / no shroud, aluminum or brass radiators, etc - and it's impossible to draw conclusions without a lot of anecdote.
Dave did some great genuine research & measurements here:
http://dmctalk.org/showthread.php?49...-Fan-Test-Data
The data suggests OEM fans flow more but at quite a current cost
Luke S :: 10270 :: 82 Grey 5-Speed :: Single Watercooled T3 .60/.48 :: Borla Exhaust :: MSD Ignition :: MS3X Fully SFI Odd-fire EFI :: DevilsOwn Methanol Injection
Dave M vin 03572
http://dm-eng.weebly.com/
Posts: 1,235
On a helicopter cooling fan my company was working on many years ago, it had a stainless fan that was just cut out with a waterjet and twisted blades. We hired a fan expert and he made two suggestions. The first was to add a curve to the lip of the shroud. That didn't seem to make much differnce and it wasn't worth the production costs. But he also recommended the fan blades be "cupped". That made a world of differnce. That was on a pusher configuration. He told us that a fan like ours is good for velocity, but no good for pressure. (We needed pressure) The cupped blades helped a lot, but were not ideal. Robinson helicopters use a squirrel cage fan which he said was much better for the application. (To hard to design into our aircraft)
While our fan is not good for pressure, it should be fine in a puller configuration. The OEM fan shroud looks good to me. It would be nice if I could incorporate the brushless fan into it, but I doubt I can. I am pretty good with sheet metal, so I think I can come up with something.
Location: Pittsburgh, PA
Posts: 504
My VIN: Yes.
Club(s): (DCO) (DMA) (DCUK)
Well, yes, Exactly. For now, both my cars have original (or apparently so) fans, and until there's a compelling reason otherwise, or I somehow run out of
other things to fix, they'll stay like that. Certainly the cooling in my driver seems to work extremely well; only twice has the needle threatened the first
mark on the gauge. I'm less convinced that things are OK in the project, but won't know for a while.
~LXA~
Dunmurry | Stuttgart | Leipzig | Munich | Tochigi | Fremont | Bratislava | Sindelfingen | Kansas City | Oakville | Coventry
Location: Northern NJ
Posts: 8,570
My VIN: 10757 1st place Concourse 1998
If you are moving over around 30 MPH you don't even need the fans to provide enough cooling if the cooing system is in "good knick".
David Teitelbaum