Drag Racing Discussions > Front Engine Dragsters
aluminum exhaust
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.
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