How fast will a dyna go?
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,225
From: the 50s & the 60s
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what motor ack?? 389?? 3x the ci
but, what, 7x the weight?? 6x??
that's a fast goat.
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what motor ack?? 389?? 3x the ci
but, what, 7x the weight?? 6x??
that's a fast goat.
.
Road Warrior
Joined: Nov 2008
Posts: 1,789
Likes: 9
From: Double Oak, Texas
My dyna puts out (in it's current state of tune & cam) 42% more HP at the rear wheel than a stock 96" dyna, and it puts it out near the top of it's extended rev band (about 6,200 RPM). It will reach 110-115mph quickly, but aerodynamic is rearing it's ugly head in a big way at those speeds, even tucked in tight and with no mirrors it struggles to gain much more top end after that (I.E. need LOTS of staightaway)......
http://www.youtube.com/user/centerli.../0/trtxeDsDisY
http://www.youtube.com/user/centerli.../0/trtxeDsDisY
Outstanding HDF Member
Joined: Aug 2008
Posts: 2,207
Likes: 0
From: East Texas
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two guys rode out to the Bonneville salt from New Mexico last year
one was a Dyna, one a bagger
dyna went 133.7, the bagger 147
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link is a 20 minute clip of the trip. worth watching.......................
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two guys rode out to the Bonneville salt from New Mexico last year
one was a Dyna, one a bagger
dyna went 133.7, the bagger 147
.
link is a 20 minute clip of the trip. worth watching.......................
.
.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Haven't had mine over 105 yet, but I did that in pretty short order passing some folks, and me fully loaded for Sturgis, on the way there (saddle bags, windshield, t-bag...). I hate it when people speed up when you start to pass them..... dropped to 4th, grabbed 5th at 75 and upshifted to 6th at about 90... kept pulling like a train till I rotated the wrist back up at 105. Felt like she had a lot more to give.... I won't push her much past that withoug a good dampner installed tho. She was nice and solid at that speed. At slower speeds... like slowing down to a stop, I can't take my hands off the bars... she starts a wobble.
Last edited by archergodwin; Aug 24, 2009 at 10:43 PM.
Grand HDF Member
Joined: May 2007
Posts: 3,870
Likes: 499
From: Alberta
Try this calculator:
http://www.montana.com/~bowman/Sportster/SpeedCalc.htm
I can pull 6000 rpm in 5th on my T-Sport, but it's not as "comfortable" as a CBR 1000 at that speed. Routinely do just over 100mph when passing; that happens easy and quick...
http://www.montana.com/~bowman/Sportster/SpeedCalc.htm
I can pull 6000 rpm in 5th on my T-Sport, but it's not as "comfortable" as a CBR 1000 at that speed. Routinely do just over 100mph when passing; that happens easy and quick...
Outstanding HDF Member
Joined: Aug 2008
Posts: 2,207
Likes: 0
From: East Texas
Try this calculator:
http://www.montana.com/~bowman/Sportster/SpeedCalc.htm
I can pull 6000 rpm in 5th on my T-Sport, but it's not as "comfortable" as a CBR 1000 at that speed. Routinely do just over 100mph when passing; that happens easy and quick...
http://www.montana.com/~bowman/Sportster/SpeedCalc.htm
I can pull 6000 rpm in 5th on my T-Sport, but it's not as "comfortable" as a CBR 1000 at that speed. Routinely do just over 100mph when passing; that happens easy and quick...
Thread Starter
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senior experienced all-knowing leader of the unwise
Joined: Apr 2008
Posts: 1,957
Likes: 351
From: USA
Yeah, nice FXDXT. What's in the motor?? Couldn't open the speed calculator. Maybe mine would pull 6000 rpm in fifth, who knows. With main jet too lean and timing retarded i was pulling 85 TQ/95HP @ 6,000. It's putting out more now. I put in the #175 main jet i forgot and i'm working on writing an ignition map to eliminate low end roll-on pinging. High speed advance should be just right.
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Elite HDF Member
Joined: Apr 2009
Posts: 4,082
Likes: 11
From: Long Island, NY
Burried the needle (120 mph) and still pulling in fifth. (Broke through 100 mph in 3rd). Was still accelerating when I developed a wobble so I backed off. I'll throw the Garmin on one of these days and get a true top speed number.
Grand HDF Member
Joined: May 2007
Posts: 3,870
Likes: 499
From: Alberta
'01 FXDXT
103 inch motor:
Jim's/SE crank
CP pistons @ 10.6-1
HQ heads, 033G cams (S&S gear drive), lifters and ignition
2" Cycle Shack pipes
Chassis:
Excell aluminum rims with SS spokes; 4.25X18 rear
Bridgestone radials
Sputhe engine mounts and aluminum swingarm
Lyndall composite rotors
607lbs with 1/2 tank of gas
goes good, handles ok, stops quick.....
103 inch motor:
Jim's/SE crank
CP pistons @ 10.6-1
HQ heads, 033G cams (S&S gear drive), lifters and ignition
2" Cycle Shack pipes
Chassis:
Excell aluminum rims with SS spokes; 4.25X18 rear
Bridgestone radials
Sputhe engine mounts and aluminum swingarm
Lyndall composite rotors
607lbs with 1/2 tank of gas
goes good, handles ok, stops quick.....