Jetting again! Dual pipes?

[90GS500rehab]

Ok so my never ending project is wrapping up. Got the 150/40/2 washers in the bike w/ K&N pods. Right now I have the stock can on so I know we will be way rich but these will be here on Friday:

Ducati ST4 S cans


http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=35619&item=2425098898

For the jet guru's, do you think these two cans will flow the same as a single "race" can. I'd rather not core them but I've haven't been able to find a post on jet results on a dual can setup.

Thanks!!!!!

[JasonB]

Post over on the uk board as a member there has dual cans and he can let you know what he did for his jetting.

[90GS500rehab]

Post over on the uk board as a member there has dual cans and he can let you know what he did for his jetting.

Thanks!
I think I have seen pics of that bike. I see what I can find over there.

[The Buddha]

It will not flow more than stock head pipe and slip on or aftermarket pipe...atleast where jetting is concerned. The resistance from your ports I think is the limiting factor once you take off the stock can. You start doing some flowing porting work and then you may need better pipes...but for now you bike is limited by the ports and flow rate.
Cool.
Srinath.

[90GS500rehab]

It will not flow more than stock head pipe and slip on or aftermarket pipe...atleast where jetting is concerned. The resistance from your ports I think is the limiting factor once you take off the stock can. You start doing some flowing porting work and then you may need better pipes...but for now you bike is limited by the ports and flow rate.
Cool.
Srinath.

Yes, for sure, as long as two stockers will flow as much as a good slip on, that is what I am looking for.

[The Buddha]

Oh...they are stock...From what bike...They look like they have those bolts with welds to keep you from un screwing them...grind it with a drememl tool and unscrew them and make sure they atleast have a dime sized flow through...else they may be no better than the stock... Maybe just open up the thing to a quarter size hole and put 1 on instead of 2.
Cool.
Srinath.

[90GS500rehab]

Ducati ST4

[Piper5177]

Those will definitely flow better than the stock can, I dont know about if it will be better than an after market can.  You'll probably still get more back pressure than a V&H or a Yosh.  What headers are you using?

[90GS500rehab]

Standard head pipes for now.

[96gs]

you can out dual pipes on a gs?

[90GS500rehab]

Yes, I'm having an exhaust shop cut at the collector and make a new Y pipe.