I've got a set of 496 CMI's. If CMI is in agreement, I'd be happy to hand them and ours over to a dyno facility. Hell, I'll even get the engine. Westech seems to be pretty popular, Raylar has worked there and at HP Dyno. I can't speak for Ray, but I would love for him to conduct the testing, you won't find a more honest and candid opinion. He also already has the necessary equipment to perform the testing.

The testing could reflect HP and torque gains as well as ease of installation. If we could get 3 or 4 guys to participate it would only cost roughly $450.00 per guy.

Four sets of exhaust would need two full days on the dyno.

As stated in this thread as well as others, Raylar conducted our dyno testing, so he's very familiar with the Dana system and he has expressed his opinion on our exhaust.

We're not interested in a macho man contest, but we'd love to participate in a friendly dyno day that would result in some good comparisions with different exhaust systems on the market.

Wow, the Mercruiser engines must run really rich to show a horsepower improvement with headers on a speed-density fuel system, with no regulator changes!

The dyno test sounds like a lot of fun. If you would like an impartial observer for the tests, I would be glad to volunteer if it's in the LA area on a weekend. I don't even own a 496 engine. It's been a few years since I did dyno testing as a test engineer for GM, but, hey, it's like riding a bike right?

Michael

Hey Mike, Email me your contact information to [email protected]. Thanks for the offer and you can rest assured that I will call you if this materializes. Even if it doesn't we'll be doing some dyno testing on a whipple charged engine real soon. I'll keep you informed of when and where and you're more than welcome to come down and check it out.

I'm sure that Full Throttle Marine will have results within the next couple of weeks. He mentioned he was starting on the project right away. That will be one additional impartial party to offer information.

That sounds awesome I hope things work out so it CAN happen....even though I already purchased the Dana exhaust

Everyday Low Price: Satin Finish or Polished Finish.

If you are interested please PM or call for special OSO member discount

Thanks,
Brad
800-225-9871 x11

OK Bob(Dana Marine), we can make it happen. I've got the engine and a set of your headers. Send me the CMI's. I've also got a set of Lighnings that I may be able to test. The boat will be at my shop within the hour to begin baseline testing. I am going to lake test the boat today and get a good GPS number. Then propshaft dyno it. Install your exhaust and repeat the dyno and lake test next week. Then I'm pulling the engine and will put it on the engine dyno to compare flywheel HP data. From that point we're installing a Raylar kit and will repeat the dyno and in-boat tests. My engine dyno is plumbed to run complete wet exhaust all the way out of the building so it truely is just like in the boat. Any observers would be welcome. I'm in central Texas.

Bob

If you were to purchase the Lightning's Silent Choice system the diverters are included click here for more info and to see a picture
NOTE: That particular part # is NOT for the 496

Hey Bob - Sounds good, I'll get in touch with my Comp X rep (CMI company) and make sure they don't have a problem participating.

I know what you're doing is alot of work, so I as well as others here greatly appreciate your volunteer work.

$3900 for the stainless Lightnings is very close to the CMI's are'nt they, I agree the best bang for the buck would be Ray's 103 kit. Sounds like the Dana headers are the real deal. You guys are doing the best thing in having them evaluated by a third party at your expense. Speaks highly of your confidence in your products. good luck

Hi, how much would I be able to gain on a 377 Scorpion engine if I change to tubular headers? I have CMI silent choise today and want to continue to have silent choise. What wld you reccomend? Or do I need a blower kit?

Thanx for input!