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Davids63Dart
 Post subject: Exhaust Size
PostPosted: Thu Apr 16, 2009 10:21 pm 
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Location: Wilton, CA
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What size exhaust tubing should I use on my 63 Dart.

It is a stock motor, and it has headers. I only use this car for racing, so I was wondering what size exhaust tubing you guys run for the most power, but still have enough backpressure. Thanks.

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1963 Dodge Dart -225 Slant 6, 904, 2.76's, 18.84 @ 73
1970 Nova 12.53@108
1970 Bug 15.38@87

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Joshie225
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PostPosted: Thu Apr 16, 2009 10:43 pm 
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Supercharged
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Location: Portland-ish
Car Model: Fiat 500e
Enough back pressure? :x No such thing on a 4-stroke-cycle engine.

2 1/4" works well if you use a good muffler. I like the Walker Dynomax Super Turbo and also the Dynomax Ultra Flow if you want it a little louder.

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emsvitil
 Post subject:
PostPosted: Thu Apr 16, 2009 11:03 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
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Location: So California
Car Model: 64 Plymouth Valiant
Race car with headers.........

Is it 3-2-1 or 6-1?


3-2-1, I'd do 2 1/4 merged to 2 1/2

6-1, 2 1/2


Or 3-2 dual at 2 1/4

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

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Davids63Dart
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PostPosted: Fri Apr 17, 2009 9:07 am 
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It's 3-2 headers, and I'm going to keep it dual exhaust, and run one pipe over to the other side.

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1963 Dodge Dart -225 Slant 6, 904, 2.76's, 18.84 @ 73
1970 Nova 12.53@108
1970 Bug 15.38@87

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Joshie225
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PostPosted: Fri Apr 17, 2009 9:10 am 
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Supercharged
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Location: Portland-ish
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Single exhaust is cheaper, lighter and makes every bit as much power as duals if done right.

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THOR
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PostPosted: Fri Apr 17, 2009 9:32 am 
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And it still sounds good!

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Charrlie_S
 Post subject: Re: Exhaust Size
PostPosted: Fri Apr 17, 2009 9:48 am 
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Quote:

I only use this car for racing, .
Why do you want an exhaust system (mufflers)? Just use pipe(s) off the collectors, the same dia as the headers, to clear the engine compartment.
Make sure the exhaust does not blow on anything that can burn or melt.

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Charrlie_S
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emsvitil
 Post subject:
PostPosted: Fri Apr 17, 2009 1:39 pm 
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Joined: Thu May 12, 2005 11:50 pm
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Car Model: 64 Plymouth Valiant
You'll gain some power with an X pipe.......

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

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ceej
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PostPosted: Fri Apr 17, 2009 1:42 pm 
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I'm with Charrlie. Just dump them under your butt.

That way you'll almost be able to hear the engine running when you stage next to a Gasser! :lol:

CJ

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theslantingsix
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PostPosted: Sat Apr 18, 2009 6:36 pm 
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Location: hillsborough NC
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slants sound good with a straight pipe they sound like a massey ferguson 300 combine with no muffler

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1973 plymouth duster 225 slant six .30 over, erson 270 cam, 9.5 to 1 compression, big valves, headers, and a holley 4 bbl
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hey that thing got a hemi? naw its just a slant six
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Rug_Trucker
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PostPosted: Sun Apr 19, 2009 4:01 am 
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Dual straight pipes would be neat! :lol: Some tracks require mufflers to pass tech.

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