Set the crossover as far forward as possible.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

A good backyard trick is to paint your dual exhausts from under the firewall to about the tranny crossmember(or if headers from the flange to the crossmember) and run the car at high rpm (3000rpm or better)...look for the spot that is most burnt...locate your H-pipe there...

-D.Idiot

I think an X pipe would be slightly better than an H pipe........

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

Better yet, run a single exhaust. Cut your system weight nearly in half. Simplify, and get basically the same performance results for a street driven car. (If not better.)
It will certainly live longer.

2¢

CJ

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Part of Tyrde-Browne Racing

Run 2" primaries 32" long to a Flowmaster "Y" and run a single pipe 2 1/2" to a quality muffler and single to the rear. Most torque for a street build.

If you need a wow factor run a 3" single from the "Y".......and add a homemade Formula S tip.

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Yeah....Im the one who destroyed this rare, vintage automobile.....

+1 on Sandy...

Lou

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Home of Slant6-powered fun machines since 1988

Thanks for the responses to my question about the "H" or "X" pipe position. Seems I have two ideas there. I'll need to make a decision on that.

Interesting other ideas about routing into one tailpipe. I'm a bit old for the "bling thing", and am wanting to acquire the cool smooth sound of a split manifold six cylinder engine. I've never heard a slant six with a split, but while in high school in the early sixties, many guys had 216 and 235 Chevy's with splits. Damn but that sounds neat. A much cooler sound than a V-8. The slant 6 should sound similarly to the 235 since the firing order is the same. I think that all inline sixes are the same firing order.

I would like to get all the low and midrange torque I can, but high performance isn't the goal.

I surely do like this car site.

Thanks

Jerry in Denver

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Jerry in beautiful Colorado

Another vote for the 2 into 1 "Y" pipe system.
I use that type of system on most all of my SL6 set-ups.
DD

My step dad had a 55 or 56 Chevy truck with Fenton exhaust manifolds, 2 1bbls. He ran straight pipes out to the bumper. It wasn't very loud.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

Yes,

I too would like to see a pic or two of the H pipe or an X pipe set up under the Dart, where to run the pipes. I'm sure any competent muffler man could do a set up, but with a pic it would make it so much easier.

Also, thanks to DD for the info on the Offenhauser, great. Now that I had the whole weekend to ponder it (installed a remote hood release in my '67 dart) I think I might as well go with a four barrel or two two barrels with the Offenhauser set up. I prefer the two two barrels, but does anyone run the single four barrel offenhauser? It seems like the two carb set up would distribute fuel better, but if the single four is good, it would be much less work to set up. If I'm running the Dutra Duals with 2 1/4 in exhaust pipes, what four barrel would be optimum balance (in to out, so to speak)? What two barrels are best for the two two set up?

thanks all,

'67 Dart 270

What other (internal) modifications are you doing to this motor?

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Yeah....Im the one who destroyed this rare, vintage automobile.....

OK, call me simplistic, but I was going to order a long block from a reputable engine rebuilder. Essentially I was going to get the "towing package" cam for low end torque and maybe shave the head and/or block for some compression enhancement. The rest would be bolt on performance.

"am wanting to acquire the cool smooth sound of a split manifold six cylinder engine. I've never heard a slant six with a split, but while in high school in the early sixties, many guys had 216 and 235 Chevy's with splits. Damn but that sounds neat. A much cooler sound than a V-8. The slant 6 should sound similarly to the 235 since the firing order is the same. I think that all inline sixes are the same firing order. "

Jerry those Chevy 6 cyl had the manifold split 2 & 4 . The slant six are usually split 3 & 3 so the sound isn't like a Chevy 6 from the old days.

Richard

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Part of Tyrde-Browne Racing

Fopar,

Funny you should mention the split 2 and 4. I've never seen that on any of the Chevy sixes, but have heard many people tell about it. Even my late father told me of splitting his 216 '41 Chevy 2 and 4. The Fenton headers that I've seen are all 3 and 3. Have you ever seen Fentons with 2 and 4? I gotta tell ya, I'd like to hear how that sounds.

Jerry

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Jerry in beautiful Colorado

You also have to remember that the old Stovebolt engines had 2 cylinders that had siamese exhaust ports(only 4 ex. ports with 6 cylinders), kinda' like the Flathead Ford V8 with only 6 exhaust ports and 8 cylinders, so the sound of those engines with a split manifold is going to be somewhat different than an engine that truly has 6 individual exhaust ports in the head and is split.

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There's no such thing as too much cam....only not enough engine!