| Author |
Message |
Clara 
Samba Member
Joined: June 14, 2003
Posts: 12655
|
 Posted: Sat Jul 02, 2005 8:13 am Post subject: cooling tests |
 |
|
Some of you remember me mentioning a project I did for a college physics project to look at cooling in an ACVW. I wanted to see if the ugly scoops some people like to put on the vents actually cools the engine. Here's a couple scans from my lab notebook I found today.
Interesting... air flow from the heater vents goes DOWN with scoops on.
on the figure below I added straight lines with the computer program. But I think that was a mistake... the temperature at the heads does not go up directly with the rpms... so look at the points and ignore the lines
_________________
The Obsolete Air-Cooled Documentation Project http://oacdp.org/ |
|
| Back to top |
|
 |
Spezialist
Banned
Joined: July 01, 2005
Posts: 1941
|
| Posted: Mon Jul 04, 2005 1:07 pm Post subject: |
|
|
| sorry i didnt wait for whole down load of your topic to exiced does it say the fan sucks thereby it cools |
|
| Back to top |
|
|
Spezialist
Banned
Joined: July 01, 2005
Posts: 1941
|
| Posted: Mon Jul 04, 2005 1:09 pm Post subject: |
|
|
| you would never want to block air flow,vents cool pre fan air by compression release |
|
| Back to top |
|
|
fig
Samba Member
Joined: August 17, 2000
Posts: 1080
Location: 26.15°S, 28.2°E
|
| Posted: Mon Jul 04, 2005 1:44 pm Post subject: |
|
|
My 63 Dormobile had these fugly (but well made) vent scoops when I bought it.
I did an unscientific test of running the same engine in my unscooped Fleetline panel and the Dormer.
It consistently ran cooler (dipstick test) in the dormer.
FWIW.
_________________
fig
Kaapse Kombi Kult
"Don't make a fuss, just get on the bus ..." |
|
| Back to top |
|
|
Clara
Samba Member
Joined: June 14, 2003
Posts: 12655
|
| Posted: Wed Jul 06, 2005 9:04 am Post subject: |
|
|
| spezialist wrote: |
| you would never want to block air flow, |
I agree
| spezialist wrote: |
| vents cool pre fan air by compression release |
??huh?? what does that mean, and how do you know it happens?
The reason I did this test was because I had heard people say this or that makes an engine run cooler, but no one had any numbers to back up their claims. Just an opinion. Or a line of reasoning. And I heard conflicting views. I actually wanted to test more than just scoops, but ran out of time.
The odd thing is that the mechanism for sccops making the engine cooler was NOT what people had claimed... people seemed to think it would make more air run through the cooling system due to the scoops 'pressurising' the engine compartment. But less air was blown by the cooling system. 
_________________
The Obsolete Air-Cooled Documentation Project http://oacdp.org/ |
|
| Back to top |
|
|
|
