View unanswered posts | View active topics It is currently Tue Aug 22, 2017 10:44 am



Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
 Finned spacer 
Author Message

Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
I like to keep an eye out for interesting parts or changes to a normal part, for example these finned spacers. http://www.alphafinnedspacer.com/

Anyone who knows how a radiator works can see some potential in more surface area for heat dissipation. Sure there are isolation spacers like wood, plastic/phenolic & shields out there, but this look like an interesting idea.

_________________
Sometimes you ask the wrong question, but it still leads to the right answer.


Wed Jan 21, 2015 2:29 am
Profile

Joined: Thu Mar 28, 2013 6:09 am
Posts: 729
I really don't think there is anything better tan a piece of wood.. But that would give
a hot rod some bling!!


Wed Jan 21, 2015 7:24 am
Profile

Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Yah wood works good, but soaks up fuel, plastic can warp. I think the fins might be a good compromise for the street with a thick isolator gasket. Well not that I'd buy that guys, but I'd maybe add fins to a spacer myself.

_________________
Sometimes you ask the wrong question, but it still leads to the right answer.


Wed Jan 21, 2015 12:29 pm
Profile

Joined: Mon Dec 29, 2014 1:26 am
Posts: 433
Pseudo-science gimmick. It would keep the carb just as cool if you were to cut the fins off... any benefits that spacer shows is only because of a reduced cross section area of the aluminum. Aluminum is an outstanding heat conductor but not a very good heat radiator, so even with a smaller heat path it's still not able to do much insulating at all.

About the drawbacks of wood spacers... yes, those things can be issues if you use the wrong kind of wood. So don't use whatever piece of chipboard you find in the scrap pile.

_________________
Hate drilling setscrews? Click here! Free!


Wed Jan 21, 2015 3:01 pm
Profile

Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
You missed the point. Heat sinks use fins for surface to help dissipate heat and some are made of alum. I do agree the reduced cross section is part of it.

_________________
Sometimes you ask the wrong question, but it still leads to the right answer.


Wed Jan 21, 2015 9:30 pm
Profile

Joined: Mon Dec 29, 2014 1:26 am
Posts: 433
I didn't miss anything, the fins are a decorative gimmick and it would work just as well (or not) without them. If there is any cooling to be had there, it's from undercutting the upper & lower gasket flanges (which gives a narrower heat path from the hot thing to the cooler thing), not from anything the fins are able to disperse to the atmosphere.

And I didn't even get to the claimed amount of temperature reduction. A poorly designed (intentional or otherwise) test can be made to give nearly whatever result you want. In the baseline, non-finned-spacer test, what parts were used in what combination? An intake manifold, a single gasket, and a carb? And then the Super Spacer is installed and guess what, a second gasket sneaks its way into the test rig. What would the baseline 'before' temp have been if the arrangement was intake>gasket>gasket>carb? Or better yet, intake>gasket>non-finned spacer>gasket>carb. See what I mean?

The tried and true hardwood spacers will beat the snot out of an aluminum anything.

_________________
Hate drilling setscrews? Click here! Free!


Wed Jan 21, 2015 10:34 pm
Profile

Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Oh I don't care about the claims, we all know how that goes and I said I agree the narrow path is part of it. Increased surface area is proven heat dissipater that could aid/divert from the reduced surface area the heat that has to travel from the hot object to the cold. I also stated wood is better, but you feel the need to repeat what we have both said I can do that as well. Your opinion has been noted and unless you have any new info thx for your opinion.

_________________
Sometimes you ask the wrong question, but it still leads to the right answer.


Wed Jan 21, 2015 11:01 pm
Profile

Joined: Sun Jun 23, 2013 1:41 pm
Posts: 375
Location: Phila. Penn.
I'm reminded of back in college heat trasfer class. It's not a given that fins will disapate heat. IIRC it depends on the spacing and the thickness of the fins and probably some other factors I don't remember off the top of my head. They can also conduct heat the wrong way. :O


Wed Jan 21, 2015 11:52 pm
Profile WWW

Joined: Mon Dec 29, 2014 1:26 am
Posts: 433
BOOT wrote:
Your opinion has been noted and unless you have any new info thx for your opinion.


I apologize for turning it into a personal attack on your worth as a human being, I forgot the discussion was supposed to be about the relative merits of some piece of metal. :\'(

_________________
Hate drilling setscrews? Click here! Free!


Thu Jan 22, 2015 10:07 am
Profile

Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Mattax wrote:
I'm reminded of back in college heat trasfer class. It's not a given that fins will disapate heat. IIRC it depends on the spacing and the thickness of the fins and probably some other factors I don't remember off the top of my head. They can also conduct heat the wrong way. :O



Good point but I believe the ambient air should be below the metal temp and if not even a wood spacer won't help you.

_________________
Sometimes you ask the wrong question, but it still leads to the right answer.


Thu Jan 22, 2015 11:27 am
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 17 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software for PTF.