Suzuki V-Strom (VStrom) Owners Club DL250, DL650, DL1000 & DL1050
V-Strom specific discussion => V-Strom specific discussion => Topic started by: steveP Scooter on July 22, 2020, 17:38:26
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Anyone know of a downside to removing the collector box on the DL1000, K3 model?
I'm toying with the idea of making new pipes for it while it will be in pieces, and just wondering if there would be any unwanted effects with its removal. It currently has Delkevic end cans on it with the baffles in place so I'm thinking that should create enough back pressure to keep the fueling in check and not have to do any re-mapping of the ecu.
Unless of course I am completely wrong, which wouldn't be unusual in the least :shrug:
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By removing the collector, do you mean run one cylinder to one silencer and doing away with the cross-over pipework? If so it isn't a good idea, Suzuki did a good job with the cross-over pipe design.
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Yes, that's exactly what I mean.
I have no catalytic converter on this, and apart from noise reduction or back pressure creation, I cannot see a reason for having the collector box there unless it is to facilitate the easier manufacture of the exhaust pipes. I must correct one thing in my original post, I have Remus end cans and not Delkevic, although I don't think that makes any difference to things.....
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I've had a quick look for an article I found some time back about the pros and cons of link pipes between exhausts on twin cylinder bikes but it's escaping me for now. The upshot of what I'd read was that a crossover pipe improves the lower end power, and separate pipes can give you more at the top end, but you lose at the lower & mid range that most of your riding uses.
However, the Guzziology bible suggests that larger volume crossovers can increase flow and power where they're basically empty boxes, but reduce mid range. Where there's any kind of silencing in them as there usually is to meet restrictions without making even bigger silencers, then you're not getting that effect.
What you're possibly better thinking about is keeping some form of crossover, but not a big volume in itself.
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Going back a bit (!) to the old British Twins of my youth, the accepted wisdom seemed to be that separate pipes was the best layout for ultimate power, but "siamesed" pipes (into one silencer) was better for low-down torque/power. Hence the cooking bikes tended to have siamesed pipes, but the sporty models separate systems (although even they tended to have a link pipe near the exhaust ports).
And then there were twin-port singles! :smirk: