Looking for good SBC exhaust?
 

I am looking for a good SBC exhaust. I want something with good flow and that will last along time. I don't want to replace it every couple years cause it leaks

Revolution Marine.

http://revolutionmarine.com/shopsite...bcexhaust.html

Had a set on my 427 cu/inch small block, and they did great!

Motor produced 618hp at 6200 rpm.

Chris

Stainless Marine. No worries about leaking risers because the joint is dry. SM will also build any length riser pipe that you need and from what I have heard it doesnt cost a whole lot more than their standard stock riser.

EMI Exhaust is the best deal out there, good quality, good price. Call or PM and i will give you a great price.
Bill

Had these imco powerflows on this 500HP small block for about a decade now.

No problems other than being tricky to fit for my application.

They arent the cheapest units out there, but they've been great.


Uncle Dave

The best available.Attachment 400681

Looks like CMI's- fantastic product

Lightning make a great small block true header as well.

True headers of are in a different price category than manifolds.

UD.

IMCO or Stainless Marine would be top picks for longevity, performance, and price. Let us know if we can help with prices.

For the money, hp increase, weight decrease from stock, looks and durability I found the Stainless Marine to be the best value....I was purchasing 2 sets though. In my application 99' AT28 w/350magMPI's-Bravos they added 200-300 rpms/1.5-2 mph.
For a single I might go with something more pricey...

I haven't seen the words "CMI" and "fantastic product" in the same sentence for a long time unless the sentence was "The CMIs on my 525s leaked and I bought Stainless Marine which have turned out to be a fantastic product"

Yup, Stainless Marine !!!!!!

I went the cheaper route on mine and bought a set of $250 GLM aluminum manifolds off from Dennis Moore. They have the individual runners like the more expensive manifolds. I used a set of FastGlass/Imco Stainless short risers and welded on 22" extensions to prevent reversion and also to help with power. The water and exhaust do not mix until inside the tip. While not the prettiest, they flow plenty for 500hp and the boat runs 80.5 GPS. Not bad for $250 plus some custom fab work on the risers.

http://usera.ImageCave.com/ryanootj/DSC00365.JPG

http://usera.ImageCave.com/ryanootj/DSC00368.JPG

http://usera.ImageCave.com/ryanootj/...iringstand.jpg

Dry exhaust sounds better too......

http://www.youtube.com/watch?v=rxT0vfMSJDM

http://www.youtube.com/watch?v=gbnBNN3NjGY

http://www.youtube.com/watch?v=ORkMT3JMWu8

If I were going to spend the $$ on better exhaust, I would probably go SM. I like the way their riser setup is placed. Dry and adjustable. The CMI's look sweet but man the horror stories.......

it sounds like the tube style headers need to be replaced every few years I don't want to mess with that I want to do it once and do it right. All of hem seem to be in the area of $2000 so that doesn't matter much. I was thinking the lightning ones but again I hear bad things about tube headers. So far im thinking EMI or IMCO but nothing forsure yet Too bad Dana does have any for small blocks

I had the Imco's on my 406ci SBC that made 850hp. Never had a problem.
That being said if I were doing it now I would go with the CMI. They did not make a SBC set of headers when I built my motors.
MP

I've had multiple boats with them (and one boat now with them) and never had a problem with anything other than the price tag associated with buying them.

If I did Id slam them.

Did you have a problem with CMI's?

UD

Do a little digging around to see what Eddie young from Young performance has to say about EMI's. He has a lot of experience with them.

You can also call Eric at Teague and ask him about them he used to work at EMI.

Lightning makes a great product. So does Imco.

The Stainless Marine header is a little easier to fit as you can rotate the elbow ever so slightly.

Lots of great product out there the stuff Chris used (cb-blr) seem interesting as well.

Uncle Dave

[QUOTE=Uncle Dave;2982599]Do a little digging around to see what Eddie young from Young performance has to say about EMI's. He has a lot of experience with them.

You can also call Eric at Teague and ask him about them he used to work at EMI.




??????
I have sold EMI Exhaust for years and never had a problem with a set of Exhaust from them. All the customers seem to be happy they did not have to spend more $$$ for the same performance.

[QUOTE=DiamondPerformance;2982737]
All the poster needs to do is a little searching.

Have you read Eddie Youngs postings about his experiences?

(http://www.offshoreonly.com/forums/g...o-exhaust.html)

Eric at Teague did work for Eddie Marine and is a good source of info about them.
Its the posters money - free to cheap research is a good thing.

Are you suggesting either source of information isn't legitimate?


UD

I have three friends with 525s and each has had the leaking problem. No shortage of complaints about them on the forums either.

bummer- like I said never had a problem with their products.

Probably more complaints than Stellings or lightning, but CMI sells a lot more headers than either.

What are you running?


UD

I couldn't agree more! I've had 5 sets of CMI's (Mercury's version of them) on blue motors and have had leaks on 4 sets of them. No salt water, either, and the all leaked between 35 hours and 150 hours of use. Personally, if I had to purchase them with my own money, I wouldn't install them on my lawnmower :eek:. Somehow, even then, they would find a way to leak water into my engine. Sorry, but that is my opinion of their product, in particular, their welds.

total bummer-!

How'd the warranty stuff go - Smooth or was it a hassle?

Who does mercury use now?



UD

The one boat was 4 years old when I bought it, but I was the first "retail owner". It was the one with 35 hours on the ECM (a 500EFI) and Mercury said "sorry about your luck", there is a limitation on the age of the power package regardless if I was the first retail owner or not and they would not honor the warranty. The other's were more than 1 year old also, so I knew calling Mercury was a waste of my time. I called CMI when I had my first set of leakers, and they said to send them back and they would fix them ... but I would have to pay to get them fixed. My friend is really really good with a TIG torch and he took them apart and fixed the welds. He fixed all of my other ones, too, and several for other local folks, also. The previous owner of my current boat had CMI fix the leaks in my current set (on a 525 EFI), just before I bought the boat. I was fortunate, I never lost an engine. I still have the reversion cone that we cut out of one of my 500 EFI headers (or tailpipe - I don't remember specifically where it was anymore ... that was in 2002) and it looked like swiss cheese. It had ~ 125 hours on it. I'll try to post a picture of it. Just got to thinking about it, and, what is odd is that it was always the port side header that leaked on every set ... it was the port side header on my current boat that the previous owner had fixed at ~ 63 hours, also. 2 port headers on 500 EFI's, 1 port header on a 575 SCI, and the port header on my current 525 EFI prior to me owning it. I posted here on OSO about the crappy welds on the first one, back in 2002 or 2003, and got a bunch of criticism from the guy at CMI when I posted it. It may still be in the OSO archives :rolleyes:

[QUOTE=Uncle Dave;2982762]No, just saying i have sold hundreds of sets and not had a problem.

My business these days :drool: Sold the PowerPlay and other toys, had to tighten up the outlays since the construction biz is a bit down for now. Be back into something when it picks up again.

I get it, its harder to come up with the dough to spend these days.

Hope it gets better.

UD

The only time I ever lose exhausts is when I overheat them due to water constriction or blockage.

You may have picked up a used rig that could have overheated. (happens) but to have continuous bad luck really blows.

Love to read your post and their response. Please post a link if you can find it.


UD

here is the post from one of my first leakers. It was on a 2000 29 Fountain with 100 hours on it. I believe the responder "jrz" was the guy from CMI based on his responses. None of these headers "looked" like they had been overheated and I know that I never overheated any of them. I've seen several of the 525 EFI headers where one or more of the runners had a purple/blue/yellow tint due to overheating :rolleyes: I used to know what temperatures caused the different colors for different metals, but I have been away from evaluating high temperature metals for quite some time now, and don't remember anymore.

http://www.offshoreonly.com/forums/g...t-headers.html

Very good read.

Curious seems your experience showed both good and bad welds in the same header. I looked at a lot of them at teague and never saw anything looking shoddy.

Id love to see any picts, If you are sharing your experience objectively I dont see it as bashing.

Ive had mixed results on products as well and always call it out despite any kind of "loyalty" I might have if Im not taken care of. If Im taken care of Ill post I had a problem but was taken care of.

Thats certainly a sh!t experience.

Im completely F-ed if I ever had a problem because Im not getting headers for this anywhere else. Im already wondering what the tag on these babies is.



UD