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Author Topic: 100cc classic production build  (Read 9456 times)

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Offline Doc B.

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Re: 100cc classic production build
« Reply #105 on: September 15, 2020, 02:54:29 PM »
ERC has been the supplier at BMST the past few years. I think the gas classes use 110K, which is 110 octane. They also carry other blends if you run in fuel. Brings cash. Lots and lots of cash. I ran A-8D in a fuel class last time (120+ octane) and I think it was $40 or $50 a gallon. Can't blame ERC, they have to haul all that stuff out there just to fill dinky little motorcycle fuel tanks and they need to cover their costs. It's nice fuel.

Offline roflhat

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Re: 100cc classic production build
« Reply #106 on: September 15, 2020, 03:12:04 PM »
Wow really, good to know I had presumed it would be 93 RON or something. Allows a bit more engine tuning with that octane then, hopefully will run in fuel classes too

Another question, if my bike is set up say for PPC or PCG can I attempt a PAG or PAF record without a modified engine? Or is it a case of you have to run in the lowest possible class?

Offline Doc B.

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Re: 100cc classic production build
« Reply #107 on: September 15, 2020, 05:24:37 PM »
Yes, you have to run in the lowest possible class. So you would need to make changes to the bike that would force it into P-AF or P-AG.

Offline Seldom Seen Slim

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Re: 100cc classic production build
« Reply #108 on: September 15, 2020, 06:07:45 PM »
I'll list the fuels that VP plans to have at WF per a flyer I got from Ron Main.  You are welcome to look up the various flavors for individual specs.

VP 110

VP C12

VP C14

VP C16

VP MS100

VP TORQ DX Diesel

VP M1

Nitro 100%
We will have a very limited supply.
Please call Bill Lattin for more information  760 533 1932
Jon E. Wennerberg
 a/k/a Seldom Seen Slim
 Skandia, Michigan
 (that's way up north)
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Owner of landracing.com

Offline roflhat

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Re: 100cc classic production build
« Reply #109 on: September 16, 2020, 02:37:15 AM »
Ah ok gotcha, so to enter an F class I can just run an additive in the fuel or a non gas flavour. Will the fuels at BMST be the same as the WF?

Then for an AG or AF classes I guess a billet head would push me into those classes?

Offline Chris V

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Re: 100cc classic production build
« Reply #110 on: September 16, 2020, 09:05:21 AM »
As for running AG or AF, When my wife got 3 records in 2013, one for P-PG two for P-AG and P-AF to alter engine I switch stock 32mm carbs to34mm carbs. in impound however the inspector never looked at what made it qualify as "A" class.  350cc 1972 Yamaha R5 
1972 Yamaha R5  350cc

Offline RaceEngineer

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Re: 100cc classic production build
« Reply #111 on: September 16, 2020, 09:56:17 PM »
At SCTA (and AMA)  events to ensure gasoline has no enhancements a racer must buy the gas (several octane ratings available) at the actual event.  The gas is added to an empty fuel tank and sealed with security tape.  This is witnessed by an event official. The tape is to ensure nothing is added by the racer.   If the tape is broken you are then by default in fuel class.  It is not necessary to actually change the liquid in the tank.  But you must do paper work at registration to change class.

Hope this helps

Don

Offline Doc B.

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Re: 100cc classic production build
« Reply #112 on: September 17, 2020, 12:35:21 PM »
Quote
Ah ok gotcha, so to enter an F class I can just run an additive in the fuel or a non gas flavour.

I had it made clear to me for BMST 2019 that fuel doesn't mean any old combustible. It covers the racier gasolines, methanol, ethanol, nitromethane, nitrous oxide and, presumably, water injection. I had planned to run gas with a shot of nitrous and propane. AMA says you cannot run propane. But you can run hydrogen. Go figure. So be sure to double check the rules for the specific event you plan to attend.

Quote
Will the fuels at BMST be the same as the WF?


Different suppliers (ERC for BMST, VP for WF), but similar types of blends.

Offline roflhat

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Re: 100cc classic production build
« Reply #113 on: September 18, 2020, 02:14:25 AM »
I really can't thank you guys enough, this information is invaluable! Not used to folk being so helpful, or maybe just used to water speed records

The main focus is still the P-PC and P-CG records, but good to know I can attempt the AF and AG if I have time and will only require minor changes. Would be good to go after the P-P record too but that's 66mph, will have to see what my speeds are like first