aluminum exhaust

[wideopen231]

Anyone here ever seen a set of aluminum zoomies? You know me always looking for something different to to try.

[JEFF/21C]

Way back in some mag they showed someone who had tried for weght loss and they had melted

[THE FRENCHTOWN FLYER]

In the '60s Pontiac used cast aluminum exhaust manifolds on their SS BBP motors.

[tcoupekyle]

Idk for certain…. But I’m certain they’d melt. 😂

[wideopen231]

huge portion of turbo guys are running aluminum piping,lot hotter. Heat coming out of exuast just came off top of a aluminum piston. I guess we are about to find out. Only about 125 of tubing and few hours with welder to see if works.If so its 14 lbs off car.

[wideopen231]

My heads have 3/4" aluminum plates that are port matched and extend the ports and increase flow.Plan is to weld tubes to them,strap tubes togetehr and run strap bacl tp plate.Same design as a set of fuel car headers.

As long as I do not blow them off and run over them it is just experiment.Spent lot more trying something.Some worked out and some are on shelf.

[tcoupekyle]

I dig that! Let me know what happens!

[JEFF/21C]

I've run header adpter plates with no problem, there are different grades of aluninum and heat treat but welding/ heating remove the heat treat but you won't know if you don't try!

[wideopen231]

Just remember when they become std issue. Who did it first. I have list of those items and never get credit.

[THE FRENCHTOWN FLYER]

http://www.pontiacparadise.com/parts-id/exhaust-manifolds.php

[wideopen231]

THOSE LONG TUBE HEADERS HAVE TO HAVE LOT MORE VIBRATION  than a short set of zoomies would ever see.  Tubing should be here mid week.New set on by weekend and good amount of testing in drive.If weather allows local track has a TNT the next weekend and plans are to test car and aluminum zoomies will be on it. If I get any shake it will be good test and that seems to be easy to get right now NLOL.

[tcoupekyle]

Cool let us know!

[lake_harley]

I had the chance to meet the builder and look at his ultralight aircraft that had aluminum "shorty" exhaust stacks on the 1/2 VW engine it used. The builder was weight conscious to say the least, and as a result his plane came in at just under the ultralight maximum allowable weight of 254#. It was an all aluminum plane and many argue that hitting that weight goal was impossible considering all of the "features" it had on it. Cool plane and I don't think the builder was a liar!

A quick search showed the melting point of aluminum at 1221 degrees F. The header tubes would be dissipating heat pretty rapidly but I would think EGT's might perhaps flirt with that temp? Beyond that EGT might bring on bigger problems than a zoomie melting down.

Lynn   

[wideopen231]

Question/ What would you think has higher heat. Piston or exhaust tube? I am not saying there is noway I could melt the tubes down. If there is a way to destroy it I can usually find it when 25 others can not. No way the he11 I will try it attitude has anything to do with it.

[THE FRENCHTOWN FLYER]

To be fair, the underside of a piston is continually cooled by oil splashing against the bottom side and an intermittent cool inlet charge every fourth cycle.

Were it me, I would only build one bank to try at first.
And add some sort of tether.
That way you could only be "half wrong" at the most.