Aluminum downpipe done
- Thread starter gnxtc2
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Great work as usual Billy. Aluminum down pipes are very common in outlaw and DR cars now days. Billy was smart to use 11 ga. But most race cars use as light at 16 ga with some maintenance. I built a 14ga 5in DP for the GN8. Ive had no issues what so ever.My 5in DP with Volant 5in( 1.94 lb) stainless muffler weighs probably 1/4 of what a stainless and regular weight muffler would weigh.
Don,
Some of the very fast cars, with sharp bends immediately after the turbo outlet have eventually blown thru. I mean very fast cars, Outlaw style. As This is mainly because the outside of the bend is so much thinner. Some of these cars have twin turbos, big blocks, fuel tanks under the hood, so using tight bends are a must.
I built mine with as much straight tubing after the outlet to a 45 bend. There is plenty of material to disperse the heat so blowing thru should not be an issue.
Some of the very fast cars, with sharp bends immediately after the turbo outlet have eventually blown thru. I mean very fast cars, Outlaw style. As This is mainly because the outside of the bend is so much thinner. Some of these cars have twin turbos, big blocks, fuel tanks under the hood, so using tight bends are a must.
I built mine with as much straight tubing after the outlet to a 45 bend. There is plenty of material to disperse the heat so blowing thru should not be an issue.
- Joined
- Jan 19, 2005
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nice work..
Get ahold of me on where to buy the fittings/bends from. I might have left over. I'm picking up my car this coming Monday.
Happy Valen-swines Day
Billy T.
gnxtc2@aol.com
Jeff Harrington
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- Dec 16, 2001
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Just got done making one for the mustang. Its 5" diameter first bend is 11ga. with 14ga. for the rest we made the muffler outside with .040 sheet. Took the same route as the old 16 ga. steel dp which weighted 21# alum. was 11#.
We will be testing the first bend as it was so close to the motor we had to cheat it right at the turbo. I was told it would be ok.
With all these tight bends that I see everyone using right out of the turbine housing, I'm surprised that no one has developed a banjo type turbine discharge housing. From what I understand they flow as well as a straight pipe if they're done right. You could get an even tighter turn than you're getting with the traditional bends starting right at the turbine housing.
Sorry.There goes Don overthinking again.. LOL
Can't help it.:tongue:Thanks my swine:tongue:
YouLikeThat
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Some of the nicer work I've seen done.
Underboost
Mr. Dull
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- Oct 4, 2005
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Nice work! 
True and from what I've read they used to drip a little aluminum on the ground after a pass.
Yes thats a very cheap priced compared to $50 a bend in Canada
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