Post your Dyno results here.
Cruiser
Joined: Oct 2017
Posts: 195
Likes: 55
From: Apex, NC
I wouldn’t worry about anything under 3000rpm at the very least!!!!! That power curve is horrible imho. I’m guessing it’s the pipe. Starts off weak, hits hard then the party is over very fast. Exhaust is HUGE on these engines! And I think that’s why your power curve is less than desirable
Road Warrior
Joined: Feb 2014
Posts: 1,851
Likes: 420
From: Santa Fe NM
I would agree if my intention was to build another 100+ hp sportster, but it isn't, so I don't. I want good torque in the range I usually ride in, and that's 2.5-4.5k. Past that, I don't care. It looks like Cobra selected attributes to make a mid-range performer, and there it is. Personally, if I could, I'd go a few inches longer and maybe taper the collector, or maybe use a short crossover before the collector to pull the torque curve up a bit in the low end. Other than that, it rides nice, and I'll play with it as-is for a while.
As for me I'm after 100+ HP and am looking for the right pipe to have ready for the Hammer 1275 120+ HP kit coming in the future. So far the Rush slip-on's are what im looking at based off of the dyno results on Hammer's website and since the Patriot Defender went away. Had one on my 48 and liked it but it broke in a few places in just over a year and always scraped on right hand turns.
Cruiser
Joined: Oct 2017
Posts: 195
Likes: 55
From: Apex, NC
looks like Frankzilla's system is pretty well optimized with the 1250 setup and whichever Bassani 2-1 system he used. Looks like Bassani RR2 B1 Mega is made for handling exhaust flow for big power while preserving the low end.
Last edited by ApexRider; Nov 29, 2017 at 08:50 PM.
Road Master
Joined: Apr 2016
Posts: 1,031
Likes: 141
From: NJ
Sounds like you found the pipe that serves the specific purpose you are after. If you decide to install the TTI please share another dyno chart. I'm curious to know if it helps bring curve up where you want it.
As for me I'm after 100+ HP and am looking for the right pipe to have ready for the Hammer 1275 120+ HP kit coming in the future. So far the Rush slip-on's are what im looking at based off of the dyno results on Hammer's website and since the Patriot Defender went away. Had one on my 48 and liked it but it broke in a few places in just over a year and always scraped on right hand turns.
As for me I'm after 100+ HP and am looking for the right pipe to have ready for the Hammer 1275 120+ HP kit coming in the future. So far the Rush slip-on's are what im looking at based off of the dyno results on Hammer's website and since the Patriot Defender went away. Had one on my 48 and liked it but it broke in a few places in just over a year and always scraped on right hand turns.
Road Warrior
Joined: Feb 2014
Posts: 1,851
Likes: 420
From: Santa Fe NM
http://xlforum.net/vbportal/forums/s....php?t=2012160
Cruiser
Joined: Oct 2017
Posts: 195
Likes: 55
From: Apex, NC
RR3 does appear similar to the Diablo, except for a few inches longer on the head pipes. But muffler volume is small.
fitment guide says this guy will fit the roadster:
https://www.jpcycles.com/product/834-357
fitment guide says this guy will fit the roadster:
https://www.jpcycles.com/product/834-357
Road Warrior
Joined: Feb 2014
Posts: 1,851
Likes: 420
From: Santa Fe NM
RR3 does appear similar to the Diablo, except for a few inches longer on the head pipes. But muffler volume is small.
fitment guide says this guy will fit the roadster:
https://www.jpcycles.com/product/834-357
fitment guide says this guy will fit the roadster:
https://www.jpcycles.com/product/834-357
Cruiser
Joined: Oct 2017
Posts: 195
Likes: 55
From: Apex, NC
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Road Warrior
Joined: Feb 2014
Posts: 1,851
Likes: 420
From: Santa Fe NM
Yeah most likely but if I'm gonna spend 600-800 bucks on a pipe I'm gonna be really hesitant to be drilling into it to install a TTI in it. I want to buy a pipe that's gonna perform well by design that doesn't need to be modified in any way to make it perform better.
As for me I'm after 100+ HP and am looking for the right pipe to have ready for the Hammer 1275 120+ HP kit coming in the future. So far the Rush slip-on's are what im looking at based off of the dyno results on Hammer's website and since the Patriot Defender went away. Had one on my 48 and liked it but it broke in a few places in just over a year and always scraped on right hand turns.