Landracing Forum Home
December 17, 2017, 06:26:51 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: [1] 2   Go Down
  Print  
Author Topic: BMST Rule Book 2017  (Read 1230 times)
0 Members and 1 Guest are viewing this topic.
Pippi2
Full Member
***
Offline Offline

Posts: 70


"Do or do not.... there is no try"




Ignore
« on: May 17, 2017, 08:49:10 PM »

http://bonnevillespeedtrials.com/wp-content/uploads/2014/02/2017-AMA-BonnevilleSR-FINAL.pdf
Logged
Unforgiven
Jr. Member
**
Offline Offline

Posts: 38




Ignore
« Reply #1 on: October 25, 2017, 09:31:05 PM »

So, a 1000cc 2006 sportster would be illegal according to BMST rules. Since the rules state that the engine must maintain oem specs. Well that sucks. Legal for SCTA, but not the AMA ?
Logged
donpearsall
Sr. Member
****
Offline Offline

Age: 65
Location: Spokane, Washington
Posts: 672



WWW

Ignore
« Reply #2 on: October 25, 2017, 11:14:15 PM »

You are going to have to give more information. Do you mean illegal in the P-P Class? If you mean P-P, and your engine was originally 883cc and is now 1000cc, then yes, you could not run in the PP Class but you could run in another class such as the 1000cc (if it is under 1000 cc,) or 1300 cc if it is over 1000cc.  There are lots of classes you can still be "legal" in. Just be creative and match your bike to the class you want to compete in.

Not to denigrate the HD, but it could never compete with the 4 cylinder 1000cc bikes like Kawasaki and Suzuki.

Don
Logged

550 hp 2003 Suzuki Hayabusa Land Speed Racer
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4474





Ignore
« Reply #3 on: October 25, 2017, 11:25:33 PM »

The bike would be in the pushrod class.  No four cylinder engines there.
Logged
Stan Back
Hero Member
*****
Offline Offline

Location: San Berdoo
Posts: 4771





Ignore
« Reply #4 on: October 26, 2017, 01:09:38 PM »

Where do I run my 800cc Nimbus?
Logged

Member of the San Berdoo Roadsters California's most-exclusive roadster club.
Celebrating 65th anniversary of racing on the salt.
4-barrel Mike
Hero Member
*****
Offline Offline

Age: 69
Location: Portland, OR
Posts: 2791


Any fool can drive a V8




Ignore
« Reply #5 on: October 26, 2017, 01:19:02 PM »

Where do I run my 800cc Nimbus?

What  color?   rolleyes

Mike
Logged

Mike Kelly - PROUD owner of the V4F that powered the #1931 VGC to a 82.803 mph record in 2008!
Unforgiven
Jr. Member
**
Offline Offline

Posts: 38




Ignore
« Reply #6 on: October 27, 2017, 11:13:11 PM »

You are going to have to give more information. Do you mean illegal in the P-P Class? If you mean P-P, and your engine was originally 883cc and is now 1000cc, then yes, you could not run in the PP Class but you could run in another class such as the 1000cc (if it is under 1000 cc,) or 1300 cc if it is over 1000cc.  There are lots of classes you can still be "legal" in. Just be creative and match your bike to the class you want to compete in.

Not to denigrate the HD, but it could never compete with the 4 cylinder 1000cc bikes like Kawasaki and Suzuki.

Don

Not to disrespect the jap bikes, but they are ugly and cheap, and don't have pushrods, so thankfully I don't have to compete against them.  I just have to beat a XB9 Buell in both sanctioning bodies PP 1000cc class. 136 and change at BMST and the other Buell XB9 144 and change. 984cc to my BMST 883 or 984 to my SCTA 1000cc. I would have to build the bike twice in a matter of a month. Or less. So I have to build for one or the other. I believe with the right gearing set up, I could run faster than 136.
Logged
donpearsall
Sr. Member
****
Offline Offline

Age: 65
Location: Spokane, Washington
Posts: 672



WWW

Ignore
« Reply #7 on: October 28, 2017, 12:36:10 AM »

I guess I am not understanding what size your 2006 Sportster displacement is from the factory. No matter if you run in SCTA or BMST you can't change the displacement from stock if you want to run the production class. So there is no "rebuilding" as far as the size of the engine.  If it is 883cc you have to run in the 1000cc class. If it is a 1200 cc you have to run in the 1350 cc class. It is the same displacement class whether you go to BMST or SCTA.

So my actual point is, since the rules are virtually the same, you can run in both events with no changes to the engine.
Don
Logged

550 hp 2003 Suzuki Hayabusa Land Speed Racer
Seldom Seen Slim
Administrator
Hero Member
***
Offline Offline

Age: 69
Location: Skandia, Michigan
Posts: 11827


Nancy -- 201.913 mph record on a production ZX15!


WWW
« Reply #8 on: October 28, 2017, 06:19:18 AM »

Don said:  "...you can't change the displacement from stock if you want to run the production class. "

Yes you can, Don, at least in SCTA rules.  You can change the displacement of your engine as long as you stay within the size limits for the "natural" class of the engine.  Nancy's ZX14 left the factory displacing 1352 cc and ran down the long course at 1532 cc.  We had to stay UNDER the minimum size of the next class, which meant stay below 1650.  And it sat in impound at 1532 and got records at 1532.  You just can't exceed the size of the class the bike was manufactured in - and stay in production.
Logged

Jon E. Wennerberg
 a/k/a Seldom Seen Slim
 Skandia, Michigan
 (that's way up north)
2 Club member x2
Owner of landracing.com
Unforgiven
Jr. Member
**
Offline Offline

Posts: 38




Ignore
« Reply #9 on: October 28, 2017, 08:29:18 PM »

Don said:  "...you can't change the displacement from stock if you want to run the production class. "

Yes you can, Don, at least in SCTA rules.  You can change the displacement of your engine as long as you stay within the size limits for the "natural" class of the engine.  Nancy's ZX14 left the factory displacing 1352 cc and ran down the long course at 1532 cc.  We had to stay UNDER the minimum size of the next class, which meant stay below 1650.  And it sat in impound at 1532 and got records at 1532.  You just can't exceed the size of the class the bike was manufactured in - and stay in production.

Yes, this is correct. And it is how the SCTA rules read. The BMST rules state...must maintain oem engine specs. I can accomplish the SCTA P-PP 1000cc  with a crank/rods piston head swap. And then put the 883 stuff back on for BMST, if I decide I can even get close to 136 and change. Makes it tempting, because I have ran fast enough on a basically stock 883 to think it may be feasible with some serious crank work and serious blueprinting.
« Last Edit: October 28, 2017, 08:30:57 PM by Unforgiven » Logged
AHG
Full Member
***
Offline Offline

Age: 62
Location: Chesterton, Indiana
Posts: 229



WWW

Ignore
« Reply #10 on: October 29, 2017, 03:06:45 PM »

All Stock 883 Sportster in 1000/P/PP class - at over 136MPH?
I will happily welcome you at impound. smiley
Logged
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4474





Ignore
« Reply #11 on: October 29, 2017, 03:34:20 PM »

My 1000cc air cooled Triumph ran 146 mph at the BMST in 2014.  It had 87 horsepower on the rear wheel in Beaverton Oregon.  That is possible for a modified Sportster.  It had partial streamlining and was running under FIM rules.  That is roughly equivalent to AMA 1000 cc APS-AG which is 1000cc special construction, modified engine, gasoline.  The desired speeds are possible.  It will take some good aero and a modified motor. 
Logged
Unforgiven
Jr. Member
**
Offline Offline

Posts: 38




Ignore
« Reply #12 on: October 29, 2017, 10:13:47 PM »

All Stock 883 Sportster in 1000/P/PP class - at over 136MPH?
I will happily welcome you at impound. smiley

Allegedly all stock XB9 set that record. I have never seen an all stock xb9 run 150 mph. Just saying. No one has ever tried with an 883.  I have cyphered over it with a friend and we believe we can get close. I guess I will have to build two sportsters. One for the P-PP 1000cc class at WOS and a stock legal 883 for the AMA BMST. Far as BMST rules, the engine must meet oem specs. That is all it says.  Doesn't say anything else. Lot of hp left in that little 883. I have been learning and talking to the old heads, and it isn't all about hp. I hope we get to meet in impound soon.
Logged
Unforgiven
Jr. Member
**
Offline Offline

Posts: 38




Ignore
« Reply #13 on: October 29, 2017, 10:20:07 PM »

My 1000cc air cooled Triumph ran 146 mph at the BMST in 2014.  It had 87 horsepower on the rear wheel in Beaverton Oregon.  That is possible for a modified Sportster.  It had partial streamlining and was running under FIM rules.  That is roughly equivalent to AMA 1000 cc APS-AG which is 1000cc special construction, modified engine, gasoline.  The desired speeds are possible.  It will take some good aero and a modified motor. 

I have looked at that class too. Oh I know the evo sportster engine can make a lot of HP for it's size. I have been doing it for decades, I have built more than a few 100 hp sportsters. Folks would be surprised how much free hp resides in a evo sportster motor. The power to weight ratio isn't big jap power, but is respectable for the size of the motor.
Logged
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4474





Ignore
« Reply #14 on: October 29, 2017, 11:17:23 PM »

Impound?  You will not see me there.  I need to throw my bike off of a bridge to get record speeds in my class.  I will see you at the meet.
Logged
Pages: [1] 2   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page December 07, 2017, 03:24:40 PM