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#561765 - 09/04/14 10:23 pm Tom Borcherdt new LSR record  
Joined: Oct 2001
Posts: 541
Ed V Offline
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Ed V  Offline

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Howard City, MI
Congratulations are in order for Tom Borcherdt after setting a new record of 149 MPH and change in the 650 push rod gas class with his BSA B50. Tom ran just over 150 on his first pass and backed it up with a 149 and change,he was hoping for a 150 record so maybe next year.
Good going Tom!

#561776 - 09/04/14 11:18 pm Re: Tom Borcherdt new LSR record [Re: Ed V]  
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noisy norton Online content
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Riverside, CA.
I saw that on another forum. A huge congratulations!!! is in order!!!


God rides a Triumph but wishes it was a Norton.
#561808 - 09/05/14 6:41 am Re: Tom Borcherdt new LSR record [Re: Ed V]  
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Blown Income Online content
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Edgewater, Md
Thats awesome!!! 149mph is flying on a B50.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#561843 - 09/05/14 11:00 am Re: Tom Borcherdt new LSR record [Re: Blown Income]  
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DKA Offline
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North Carolina
It is an awesome feat, especially when power is down 15% at Bonneville!
Here is a link to his build.

http://www.landracing.com/forum/index.php/topic,9341.0.html

A very interesting and informative read.

Last edited by DKA; 09/05/14 11:01 am.
#561861 - 09/05/14 1:05 pm Re: Tom Borcherdt new LSR record [Re: DKA]  
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Hillbilly bike Online content
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Running from demons in WNY
That bike is finely engineered.. B 50


650 Triumph modified production LSR record holder 133.1 MPH... Twin 650 engine Triumph LSR that goes sorta fast...
#561862 - 09/05/14 1:06 pm Re: Tom Borcherdt new LSR record [Re: Ed V]  
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konon Online content
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Iowa
Followed his build thread, wonder how heavy his bike (frame) is.


1968 BSA Firebird
1200 HD
XS 1100
1971 Rickman 125
#561903 - 09/05/14 5:53 pm Re: Tom Borcherdt new LSR record [Re: Ed V]  
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noisy norton Online content
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Riverside, CA.
Konon, Weight doesn't really matter at Bonneville. For some its a benefit. The really big HP bikes add weight for traction.


God rides a Triumph but wishes it was a Norton.
#561911 - 09/05/14 6:46 pm Re: Tom Borcherdt new LSR record [Re: Ed V]  
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konon Online content
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Iowa
At 150 MPH, quess it had no effect. Congratulations.


1968 BSA Firebird
1200 HD
XS 1100
1971 Rickman 125
#561916 - 09/05/14 7:29 pm Re: Tom Borcherdt new LSR record [Re: konon]  
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koncretekid Offline
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Nova Scotia, Canada
Thanks for the comments. Frame is rigid rear made of 1" x .062" chrome-moly and weighs about 55lbs. The bodywork weighs about the same, and the total weight is around 400 lbs. Most people say that weight doesn't matter at Bonneville, but I would say start out as light as possible and add weight where you need it. I have 2 miles to get up to speed, but I know from the flying kilometer speed (center of the timed mile) that I am stll accelerating at the end of the timed mile. If I could use the kilometer speeds, my new record would be 150mph.

Alp got the 650 A-PG (open bike) record at around 133 mph with his new untested motor, and he told me he never got out of 3rd gear on the return run! Kind of like the "Little Nash Rambler" song.

Tom


Life's uncertain - go fast now!
#561970 - 09/06/14 6:27 am Re: Tom Borcherdt new LSR record [Re: koncretekid]  
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Hillbilly bike Online content
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Running from demons in WNY
Alp said the traction was poor and his engine(Triumph 650 pre unit) was spinning 8500 rpm..
Do you Salt guys gear the bike for a faster speed than what you expect to run?


650 Triumph modified production LSR record holder 133.1 MPH... Twin 650 engine Triumph LSR that goes sorta fast...
#562076 - 09/06/14 7:46 pm Re: Tom Borcherdt new LSR record [Re: Hillbilly bike]  
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koncretekid Offline
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Nova Scotia, Canada
"Do you Salt guys gear the bike for a faster speed than what you expect to run? "

My bike was geared for 152 mph at 7200 RPM with 4% slippage. New motor and I knew 7200 was safe. If I had dyno data for the new motor, I would gear it for my target speed at it's peak hp.

Tom


Life's uncertain - go fast now!
#562149 - 09/07/14 8:37 am Re: Tom Borcherdt new LSR record [Re: koncretekid]  
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Hillbilly bike Online content
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Running from demons in WNY
You have interest in running on pavement at Loring Maine or Wilmington Ohio?


650 Triumph modified production LSR record holder 133.1 MPH... Twin 650 engine Triumph LSR that goes sorta fast...
#562243 - 09/07/14 9:42 pm Re: Tom Borcherdt new LSR record [Re: Hillbilly bike]  
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koncretekid Offline
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Nova Scotia, Canada
I have been running Loring for 4 years now. In July, I ran the new motor for the first time in the Open bike class and ran 130 mph.


Life's uncertain - go fast now!
#562335 - 09/08/14 3:45 pm Re: Tom Borcherdt new LSR record [Re: Hillbilly bike]  
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Allan Gill Offline
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Rotherham - S. Yorkshire
Originally Posted By: Hillbilly bike
You have interest in running on pavement at Loring Maine or Wilmington Ohio?


I would think the set up of a bike used for several miles on the salt to be a lot different than the shorter Tarmac which you race on. The shorter circuit would ( in my view) depend a lot on acceleration, the salt would depend more on torque which will pull higher gearing, I would think too much acceleration would put you on your ass.

All these different disciplines of racing are very interesting to me.


beerchug
#562401 - 09/09/14 7:16 am Re: Tom Borcherdt new LSR record [Re: Allan Gill]  
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Hillbilly bike Online content
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Running from demons in WNY
Tarmac? Wilmington is coarse concrete grin I've talked to bike and car racers who do both paved tracks and non paved like Bonneville and El Mirage. They mentioned gearing and jetting for changes.But a lot of racers have the time honored tradition of only saying one more thing that they think you already know... Generally,the longer run on the salt gives gives higher speed potential, and less traction....If the salt is rough that adds a thrill grin


650 Triumph modified production LSR record holder 133.1 MPH... Twin 650 engine Triumph LSR that goes sorta fast...

Moderated by  Allan Gill 


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