Author Topic: Took the Sportster down the track  (Read 1917 times)

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Offline hbkeith

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Took the Sportster down the track
« on: October 10, 2020, 04:32:40 PM »
Got the Sportster out at Martin Dragway today finally , 11:80 @ 115 , 3 passes all close to the same times , get that big D carb back on it next year and try to get in the 10,s

Offline rigidthumper

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Re: Took the Sportster down the track
« Reply #1 on: October 10, 2020, 05:09:26 PM »
👍🏻👍🏻👍🏻
Track therapy is good for the soul (and sometimes hard on the wallet 😁)
Ignorance is bliss, and accuracy expensive. How much of either can you afford?

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #2 on: October 18, 2020, 03:04:09 AM »
11.10 at 120  , getting better

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #3 on: November 01, 2020, 01:10:14 AM »
ran a 11.02 at 122 yesterday , so close !

Offline BTraci

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Re: Took the Sportster down the track
« Reply #4 on: November 01, 2020, 04:31:57 AM »
Anything specific you're doing to continue to improve each session?

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #5 on: November 01, 2020, 01:05:00 PM »
Launch a little harder , was shifting at the shift light ( 7100) , going a little past it now , still not hitting Rev limiter . yesterday was a blast , running beside another Sportster , he had Wheelie Bar a Slick and Air Shift , im foot shirt , no Bar , Street Tire . He jump me half a bike from the line and would catch him at the 60' and we would run side by side all the way then i would pull him half a bike at the finish . think ive made 8 passes on this bike now .Fun Fun !

Offline sfmichael

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Re: Took the Sportster down the track
« Reply #6 on: November 24, 2020, 12:08:11 PM »
ELEVEN O's on a Sportster = BMF  :dgust:
Colorado Springs, CO.

Offline Samsquanch

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Re: Took the Sportster down the track
« Reply #7 on: January 18, 2021, 08:03:51 PM »
This sounds like a lot of fun! How bout some pics or video and details of the bike?

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #8 on: January 19, 2021, 02:08:52 AM »
Hammer 1275 , BFH Heads , Bored S&S G at the moment ,Darkhorse Crank work  Carillo Rods , Zippers Gears . 125 HP , stretched and lightend , just picked up a Wheelie Bar , going to put S&S D with 3 Thunderjets back on and try launching at 7k , hopefully

Offline turboprop

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Re: Took the Sportster down the track
« Reply #9 on: January 19, 2021, 08:09:10 AM »
Right on.
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A. Whatever YOU have

Offline akjeff

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Re: Took the Sportster down the track
« Reply #10 on: January 22, 2021, 08:06:26 PM »
Fuggin' A dude, those are good runs! :up:
'09 FLTR/120R/'91 XL1250 street tracker project/'07 DR-Z400S

Offline sfmichael

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Re: Took the Sportster down the track
« Reply #11 on: January 24, 2021, 08:33:54 PM »
Hammer 1275 , BFH Heads , Bored S&S G at the moment ,Darkhorse Crank work  Carillo Rods , Zippers Gears . 125 HP , stretched and lightend , just picked up a Wheelie Bar , going to put S&S D with 3 Thunderjets back on and try launching at 7k , hopefully

who's heads / camshaft?

very fast bike  :up:
Colorado Springs, CO.

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #12 on: January 25, 2021, 08:42:36 AM »
Hammer , im not up to Bikes potential yet , bike has ran 10.40

Offline sfmichael

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Re: Took the Sportster down the track
« Reply #13 on: January 25, 2021, 06:32:25 PM »
heads and cam are Hammer?

can you be more specific?

10.40's is amazing!!!!!  :dgust: :up:

what year Sporty?
Colorado Springs, CO.

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #14 on: January 26, 2021, 12:59:47 AM »
95 883 , Stock Heads with Hammer BFH head work , Hammer cams  600 lift , iits not a street bike , droped on the ground , no charge system  etc
« Last Edit: January 26, 2021, 02:44:35 AM by hbkeith »

Offline aswracing

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Re: Took the Sportster down the track
« Reply #15 on: January 26, 2021, 08:13:28 AM »
Kind of an old description of the BFH head work can be found here: http://harleytechtalk.com/htt/index.php/topic,90501.0.html . We were calling it "Sledge +" at the time, because Sledge was our top of the line and we figured out how to improve it, but later a customer suggested the "BFH" name and we liked it.

In short: 2.020 intakes, 1.630 exhausts, which at the overlap we run in the cams requires us to alter the valve angles, spreading the valves farther apart. Which in turn is only possible because of the larger bore the 1275 kit brings to the party. Conical springs, Ti retainers, 7mm stems, our design .600 cams, 1.725 rockers, the combination is tested stable to 8000rpm. We also do some welding on the intake short side to raise it. And we run it through our 5-axis porting machine: http://harleytechtalk.com/htt/index.php/topic,94827.0.html

Offline hbkeith

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Re: Took the Sportster down the track
« Reply #16 on: January 26, 2021, 09:44:39 AM »
Kind of an old description of the BFH head work can be found here: http://harleytechtalk.com/htt/index.php/topic,90501.0.html . We were calling it "Sledge +" at the time, because Sledge was our top of the line and we figured out how to improve it, but later a customer suggested the "BFH" name and we liked it.

In short: 2.020 intakes, 1.630 exhausts, which at the overlap we run in the cams requires us to alter the valve angles, spreading the valves farther apart. Which in turn is only possible because of the larger bore the 1275 kit brings to the party. Conical springs, Ti retainers, 7mm stems, our design .600 cams, 1.725 rockers, the combination is tested stable to 8000rpm. We also do some welding on the intake short side to raise it. And we run it through our 5-axis porting machine: http://harleytechtalk.com/htt/index.php/topic,94827.0.html
       < what THE Man said  :teeth:
« Last Edit: January 26, 2021, 09:50:47 AM by hbkeith »

Offline sfmichael

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Re: Took the Sportster down the track
« Reply #17 on: January 28, 2021, 11:52:39 AM »
Kind of an old description of the BFH head work can be found here: http://harleytechtalk.com/htt/index.php/topic,90501.0.html . We were calling it "Sledge +" at the time, because Sledge was our top of the line and we figured out how to improve it, but later a customer suggested the "BFH" name and we liked it.

In short: 2.020 intakes, 1.630 exhausts, which at the overlap we run in the cams requires us to alter the valve angles, spreading the valves farther apart. Which in turn is only possible because of the larger bore the 1275 kit brings to the party. Conical springs, Ti retainers, 7mm stems, our design .600 cams, 1.725 rockers, the combination is tested stable to 8000rpm. We also do some welding on the intake short side to raise it. And we run it through our 5-axis porting machine: http://harleytechtalk.com/htt/index.php/topic,94827.0.html

I checked it out - very cool. I've had an itch to build a 90-100 hp Sportster for the last few years. Gotta find a low miles '03 Anniversary to pimp out.
Colorado Springs, CO.

Offline ultra 08

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Re: Took the Sportster down the track
« Reply #18 on: January 28, 2021, 12:12:58 PM »
You talk about scratching an itch we had cycle and 4 wheeler races on the lake here last weekend and there was guy there riding a 1200 sportster. They can go faster around the corners on ice with studded tires than they can on a dirt track. Came out of turn four on the back wheel.
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Online Hossamania

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Re: Took the Sportster down the track
« Reply #19 on: January 28, 2021, 04:21:49 PM »
You talk about scratching an itch we had cycle and 4 wheeler races on the lake here last weekend and there was guy there riding a 1200 sportster. They can go faster around the corners on ice with studded tires than they can on a dirt track. Came out of turn four on the back wheel.

Oh yes, if you've not seen ice racing, it is a shock at how fast they can rip. No sliding through the corners, just stick and go.
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Offline hbkeith

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Re: Took the Sportster down the track
« Reply #20 on: January 29, 2021, 07:21:30 AM »
Kind of an old description of the BFH head work can be found here: http://harleytechtalk.com/htt/index.php/topic,90501.0.html . We were calling it "Sledge +" at the time, because Sledge was our top of the line and we figured out how to improve it, but later a customer suggested the "BFH" name and we liked it.

In short: 2.020 intakes, 1.630 exhausts, which at the overlap we run in the cams requires us to alter the valve angles, spreading the valves farther apart. Which in turn is only possible because of the larger bore the 1275 kit brings to the party. Conical springs, Ti retainers, 7mm stems, our design .600 cams, 1.725 rockers, the combination is tested stable to 8000rpm. We also do some welding on the intake short side to raise it. And we run it through our 5-axis porting machine: http://harleytechtalk.com/htt/index.php/topic,94827.0.html
   BFH , is that why there is a Big F ing Hammer stamped in my Jugs ? lol