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Author Topic: A-PBG-UNLIMITED build  (Read 18697 times)
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RidgeRunner
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« Reply #60 on: July 02, 2013, 08:24:53 AM »

    Maybe not, IIRC it snapped a chain in '71 on that year's hard salt. I know they came back with many changes for '72.  I'd also like any more details on that build if anyone has them.  It impressed me at the time as does this one now.  All the best for a safe, fun, and FAST meet 8pack!

                           Ed
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8pack
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« Reply #61 on: July 21, 2013, 10:41:30 PM »

With only 19 days left before Bonneville. I decided it was safe to pull the secret weapon from storage shocked I would tell you but Customs already called me 4 times and not sure if I want to talk to the NSA cheers I got the fuel tank back on but I still have to do a couple things to finish the install.  I also included a picture of the kickstand in stealth mode grin



« Last Edit: July 21, 2013, 10:45:13 PM by 8pack » Logged

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« Reply #62 on: July 22, 2013, 11:22:02 AM »

A new century Bob George dual.

Dave Campos rode it 231 MPH years ago w/o supercharging.

FREUD
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8pack
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« Reply #63 on: July 22, 2013, 12:08:24 PM »

A new century Bob George dual.

Dave Campos rode it 231 MPH years ago w/o supercharging.

FREUD

I am pretty sure my turbo will not make up for having a fairing. Maybe next year I will get my permission slip signed by my wife to add one cheers

I may be wrong but I don't think there has ever been a naked pushrod bike record over 200?
« Last Edit: July 22, 2013, 12:10:10 PM by 8pack » Logged

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« Reply #64 on: July 22, 2013, 01:14:08 PM »

Dave Matsons Vincent, 2000 M/F 210.357, 08/88
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8pack
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« Reply #65 on: July 22, 2013, 01:22:35 PM »

Dave Matsons Vincent, 2000 M/F 210.357, 08/88

Why was he in the M-F class not the M-PF class? Are the pushrods to short to qualify, cam position or???
« Last Edit: July 22, 2013, 01:27:42 PM by 8pack » Logged

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Seldom Seen Slim
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« Reply #66 on: July 22, 2013, 01:42:06 PM »

I'm not sure -- but maybe back in '88 there wasn't a separate class for pushrods. . .?  But then -- I ride metric bikes with OHC so how would I know? huh

I do know Dave Matson and his bike and enjoy seeing him on the salt every year.  And it's cool -- because not all that many Vincents run on nitro.
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bak189
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« Reply #67 on: July 22, 2013, 02:22:24 PM »

Do remember that SCTA/BNI will change the classes without telling anybody......at least they did in the "old days"..............so who knows what class Dave was running in......they changed our class 3 times back in the 1980/1990's without telling us......New M/C chairman, new classes and new interpretation of Tech. rules...... Lost 3 records.............Oh, well no problem retired now...............But still BS.
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8pack
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« Reply #68 on: July 22, 2013, 02:41:02 PM »

I looked through the records and every record with a Vincent engine is in the non-pushrod class. I do not have my rule book with me but I remember a statement about pushrod length or cam position. I guess they had a pushrod class in 1985 because there is a record.
« Last Edit: July 22, 2013, 03:03:34 PM by 8pack » Logged

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« Reply #69 on: July 22, 2013, 03:06:04 PM »

Yes, funny how Vincents are not in the pushrod class, a shame really. Also, don't let the 2000cc class for Matson's old records fool you like some have been, it was done with a single motor, he did it before there was a 1650 class, although his actual displacement back then was less than 1650. It has only been the last few years that Dave has had a really big motor and moved into the 2000cc class proper.
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Stan Back
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« Reply #70 on: July 22, 2013, 05:24:53 PM »

"Also, don't let the 2000cc class for Matson's old records fool you like some have been, it was done with a single motor, he did it before there was a 1650 class, although his actual displacement back then was less than 1650."

If that's the case, then SCTA should be notified that they belong in the 1650 class, if applicable.  SCTA has done this before when new categories or engine sizes have been added.
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8pack
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« Reply #71 on: July 22, 2013, 09:43:03 PM »

Looking at the record book. The 1650 and 2000cc classes look to be the sweat spot for motorcycles. When you step up to the 3000 and Unlimited classes most of the speeds are slower. I am sure there are a bundle of reasons. I look at my build and I can come up with a handfull of reasons it may not run as fast as the smaller bikes. However my dream was to build a double engine turbo bike that was big enough to be in the unlimited class. We are all going to find out how it works in about 18 days cheers
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« Reply #72 on: July 23, 2013, 01:05:18 AM »

That's one cool Bike hope all goes to plan  cheers

I digress, aren't Vincents in Vintage Classes VG or VF as they were pre 1956 Bikes?

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« Reply #73 on: July 27, 2013, 12:01:21 AM »

Now that months turned into weeks and weeks turned into days. I decided I need to kick it into high gear and finish up. That being said today started off on the wrong foot angry I could not get the rear engine started because I did not get a chance to flush out the race gas after the tank cracked. After a string of words I can't repeat shocked and 2 hours of jacking around I finally got both of them started cheers

With the time I had left today. I got the last of the gauges and data loggers mounted today. I also decided now that I don't live in a village anymore. I should at least install matching wheels rolleyes and check for rear wheel alignment.




I also got a chance to look at the rulebook on the requirements of the pushrod class. "Shall have pushrod operated valves with a camshaft located at least one crankshaft stroke below the OEM cylinder deck position or utilize OEM pushrod length at least twice the crankshaft stroke"
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edinlr
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« Reply #74 on: July 28, 2013, 01:22:46 AM »

The Vincent pushrods are long enough for the pushrod class and the only engine I can think of that isn't, are the last BMW's with the high cam and very short pushrods.  In the 60's and 70's there were very few large OHC engines, so pushrod motors still ruled the 1350 and above classes and didn't really need a separate pushrod class.  It would be kind of fun if they could do a few classes where everything was factored by engine type with 600 multis, 500 2-strokes, 750 twins, 1600 pushrod v-twins, etc.  It might make for some interesting racing instead of one or two bikes dominating a lot of classes.
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