3 into 1 or 3 into 3 exhaust for a GT550?

[MikGsxr]

Looking at the jemco pipes for the 550, which would be the better setup? a friend thinks that 3 into 1 would be rubbish and innefficient?

thanks

[tz375]

Please ask him to define "rubbish" and "inefficient".

3 into 1 pipes will never make as much power at teh top end as good 3 into 3 spannies, but that doesn't make them rubbish - just different.

Typically they will save around 20 pounds and make similar power to stock at low to mid revs or maybe slightly more and will make slightly less than stock (typically) at the top end but the weight reduction more than makes up for that.

For a street bike, that's a pretty good compromise, but if you like to rev the nuts off a bike all the time, go with 3 into 3 pipes and get more top end.

[Vintageman]

Do anyone's 3 into 1 have an expansion chamber section? You know, like some twins and triple snowmobiles that shared one pipe at least had a shared chamber. I really can't tell for sure, but looks like 3 into 1 I if have seen ala youtube don't have any chamber section???

Has anyone tried Jemco 3 into 3 on a GT550. Did you really gain any top end, how about mid and low.

It would be nice to have one set of each. I think if the 3 into 1 had a chamber it would perform better than stock across the board.

[Suzukidave]

Also a very nice looking 3 into 1 it has a chamber section

[Suzukidave]

Jolly Moto

[titan performance]

That looks to be a fine piece of engineering Dave, but a lot of gas trying to escape from a small chamber....
I had a Gt750 back in the early 80s, and I quickly swapped the OEM pipes for a Piper 3-1, despite all sorts of rumours about a dramatic loss of perfromance. To be honest, I never detected any loss of power anywhere in the rev range at all, and on the plus side, the sound was just awesome ! The smooth deep crackle, and improved looks would have been worth a few horses.

Just as a matter of interest, our next project at TITAN performance, is to create both 3-3 and 3-1 systems fro the Kettle, and we are not far from completing the 3-1 system. We can't wait for the day we complete the pipe and bolt it to our 750 for trial. Rest assured, it will be getting some You-tube air time when we do.

[Herman T]

I look forward to hearing your 3 into 1 on youtube and any comparison opinions to the separate pipes.

[Vintageman]

Are these with chambers all custom made or something one can purchase?

Here is one on ebay no chamber

http://www.ebay.com/itm/Suzuki-GT-380-B ... 256b87386f" onclick="window.open(this.href);return false;

Omars pictures aren't clear enough to say for sure but looks like not
http://omarsdtr.com/Ex550suz.html" onclick="window.open(this.href);return false;

I would be intertsed in ones with a chamber section. Works for a 2 stroke triple snowmobiles just fine

[titan performance]

That Japanese 3-1 on the 380 certainly sounds the part, though it looks a bit odd, and it's hardly an exspansion chamber.....as there is no chamber ! But then, how much chamber is there in the stock system? it's plenty of money too !

Our 750 3-1 systems, will have a large chamber section, with the last section of the pipe being a parallel exit pipe, containing internal cones. The pipe will be made from highly polished stainless steel, the same as our 500 systems.

[jabcb]

Some good pics of a GT550 with Omar's 3-into-1 pipes:
http://2strokebiker.blogspot.com/2010/0 ... -cafe.html

Looks like the Omar's down pipes are equal length but the eBay pipes aren't.

The eBay pipes also don't look like they been designed with cornering clearance in mind.
Anyone know anything about those eBay pipes?

My vote for a GT550 with maximum cooless would be for the 4LS front brake + 3-into-1s.

[tz375]

Mr Titan, your credibility is showing... It appears a little disingenuous to tell us in one thread that your pipes are not designed to make power and claim in another that they are a special design. Or are you a great sales person that can tell us in one breath that they are cleverly designed leading us to believe they will make power and then give us the disclaimer in the other post so we can't complain if we get pulled for making too much noise and can't complain if they don't make any power. maybe you are more clever than we thought.

I don't mean to bash them guys, but those two posts struck me the wrong way fro some reason.

Back to the thread:
Bromlech and Piper made pipes that were essentially three headers dumping into a large tube. They made a great noise and save pounds so the the bike felt more lively and there's nothing wrong with that. Some people claim they made more power than stock and others claim they made less and so far I haven't seen on on a dyno back to back with stock pipes to determine the truth of either set of expectations.

We have tested a Strader system which is really well made and has a complete conventional expansion chamber and well designed baffle. The sound is awesome and it weighs about a million pounds less than a stock exhaust.

The two pics that Dave posted are TCE by Tommy Crawford and JollyMoto out of Europe. Crawford used to make pipes for 500GP pipes as I understand the story and JollyMoto make some of the best pipes for modern two strokes. We tested JolloMoto back to back on our Aprilia RS250s with Arrow and they are great pipes. It seems reasonable to assume that either pipe will work but I have no idea what the design intent of either was. One is short and fat and the other is really long, so how do they compare?

I hear that the TCE system makes great bottom end and loses nothing at the top end.

The OMARs/Jemco system has nice short headers, even shorter than TCE and that seems to help. On Sleds with 2 into 1, headers are typically minimalist and one might assume that's to conserve pulse energy which is lost on a returning wave split into multiple long tubes.

My expectation is that the OMAR pipe would sound great and will probably be equal to stock at the bottom end and slightly less at the top and would weigh so much less that the weight reduction makes it feel better all the way through. I'd love to see dyno runs to see if that's the case in the real world.

[Vintageman]

Tz375

Other than OMAR are the others available for purchase or no longer available new

Thanks

[jabcb]

Check with Jemco. Their website has a product catalog that has a sampling of products. It asks that you contact them to see what's available.

[tz375]

I was under the impression that Jemco made the pipes for Omar, but i could be wrong about that.

I was trying to find more about that TCE system on the gray bike, but struck out so far. One forum suggested that TC is no longer making pipes but that comment may refer to a specific pipe. So far I have not managed to find them.

One of the Kawasaki guys is in the process of making a 3 into 1 with fully tapered head pipes and I can't wait to see how that turns out. The Jolly Moto system is available out of Europe for the 750 at least and I'd love to see that one on the dyno.

That Japanese system looks very much like a Piper, ROCA or Bromlech with flat collector followed by large bore parallel pipes and probably works the same with same power as stock up to say 5k and less at the top end, but that's just speculation on my part.

You could design and build on yourself I guess. Two Strke Wizard has a 3 into 1 design option and the pipes it generates are essentially the same as the 3 into 3 with a few minor differences and that's interesting. I had convinced myself that the key to 3 into 1 design was short headers but Jolly Moto goes against that idea, so who knows.

[Suzukidave]

Here's some interesting pipe details for us pipe design newbe's http://homepage.mac.com/rg500delta/delt ... esign.html" onclick="window.open(this.href);return false;