Highly doubt there would be much hp difference. There's been dyno comparison between hp and standard manifolds with no big differences. Same between 340/360/318 and magnum manifolds was like 5hp even shorty headers don't help much need long tube collector to make a decent difference especially once you start going with greater amounts of overlap.
I think the old 300hp crate motor exhaust test is worthless. The cam in the stock Magnum 5.9 (which is the same in the 300hp crate motor) is so small that there were only minor differences in power between them all. But the cam was already limiting the motor so any difference the exhaust made was minor.
So I wouldn't use that test as the standard as to which exhaust manifold is the best on a 383.
There's a 20-30 hp difference between the restrictive A-body big block manifolds and HP version.
Chrysler Horsepower ratings show the difference.
Member @AndyF did some testing. Look him up.I think as you increase hp through the manifold the b body would give up less as the hp increses. I plan on testing that theory later this summer with my 499". I'd like to do a modified c, b hp and bb a body on the engine dyno.
Member @AndyF did some testing. Look him up.
Are you testing with headers also?I think as you increase hp through the manifold the b body would give up less as the hp increses. I plan on testing that theory later this summer with my 499". I'd like to do a modified c, b hp and bb a body on the engine dyno.
Are you testing with headers also?
That would be cool if you test the 3 manifolds against the headers.I can. I have 1-7/8 to 2" schoenfield dyno headers. They have supported close to 1000hp on a previous (n20) 511" build so no problem for the baby cam.
While that maybe true when I’m search of maximizing power, he did do a build with exhaust manifolds. He wrote about it in a magazine. His books are very good.Pretty sure he would tell me to buy some headers lol. Either way you have my 2 cents above.
Member @AndyF did some testing. Look him up.
While that maybe true when I’m search of maximizing power, he did do a build with exhaust manifolds. He wrote about it in a magazine. His books are very good.
That would be cool if you test the 3 manifolds against the headers.
It could be an eye opening experience.
In bold, AndyF is. So, since the way I read this, correct me if I am wrong, if you were to talk with somebody and/or use there parts, you would speak with the above. AndyF’s company is AR Engineering.Trust me I am sure he is familiar with my GTS project. If there was an ingrediant list to my race car it would go Chrysler corp, Indy, AR Engineering and so on.
In bold, AndyF is. So, since the way I read this, correct me if I am wrong, if you were to talk with somebody an
d/or use there parts, you would speak with the above. AndyF’s company is AR Engineering.
Well OK then and thanks for not answering my question but the best of luck to you and your build.so sorry for stepping in.I am in Oregon myself and well aware who owns AR. There is only one AR part on my GTS and I have never consulted Andy on any aspect of the project.
I have two other cars that use AR Engineering cam sync setup, jesel belt drive specific crank trigger parts, throttle linkage, spring hangers, Wilwood brake kit and several others. Both of those cars are b bodies and irrelevant to this conversation.
Well OK then and thanks for not answering my question but the best of luck to you and your build.so sorry for stepping in.