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Dusty_Dave

A Bonneville Indian

107 posts in this topic

This madness started last year when Tom who is a member of our Friday gear head lunch group and who goes to Bonneville most every year to either race or officiate tossed me a copy of last years SCTA rule book and asked if I thought there was a class I thought I could be competitive in. He had underlined a few that he thought I might be interested in considering that most of my bikes are Indians

SCTARuleBook_zpsa1d2d093.jpg

After reading and rereading the rules book I finally decided this spring that a Bonneville effort would be a good way to spend the next few years of My retirement. After much discussion I am maybe positive that I want to build an AVBF A being a special construction frame which will allow me to get the head stock as low as possible with the 16" rims I chose. The rules allow as small as 15" rims but the cost and availability of tires and rims and the fact that I had a new w speed rated 16" tire made me settle on 16 inches. V is vintage engine produced before 1956 with a 33.33% size advantage given to flatheads. B is blown and F is fuel. Right now the plan is to run Nitrous oxide and alcohol through fogers because of a flatheads notoriously poor breathing even if blown. I started looking for parts this spring Got a pair of 16" 250 Ninga rims and fork and today I won a set of 37 Sport Scout cases. So it will be a 1937 Sport Scout.

Still haven't picked a displacement a 45" stock displacement Scout would run in 500 cc the ABVF record is 73.903 but the 500 cc AVF record is 111.839 so the blown speed should go way up soon and a 57" stroker would run in 650 No record for ABVF but AVF is 144.531. Leaving it a 45 would give me lots more room for piston squirters but would require a pair of std. bore cylinders but I just prefer 57 inchers and the cylinders could be way oversize per the rules.

Main thing I need to find next is a pair of cylinders I would really like to buy new ones but the rules require original cases and cylinders or exact reproductions and only ones I can find so far say improved ports and the rules committee says not no but hell no. I hear that there are exact repros but can’t find anyone selling one that will offer any documentation and at $1500.00 to $2000.00 I sure don’t want a pair of paper weights.

I’ve been promising to start writing this up for a while but having the cases and being able to assign a year to the build finally got me moving. Stay tuned

Dusty

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This is soooooo fucking cool!!! :thumbup1::thumbup1:

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Hells to the yes......This is awesome dusty....I have been to bonneville, when no one else was there....Our rental topped out at 110.....it was extremely cool....I have always thought it would be amazing to run a bike.

Edited by Laddie

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Dusty. Shoot me a pm with exactly what cyl you are looking for. I know a guy who may be able to help

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Got my cases today they are as advertised. Need lots of cleaning. a small weld and a custom sized rocker arm pivot.

Definitely a 37 high performance Scout with a Magneto and the y cylinders and manifold.

37SSCasesSN_zpse4244111.jpg

Will need a small weld where the cylinder base mates.

37SSCasesRHDamage_zpsa492e1d2.jpg

Need to extract one broken bolt

37SSCasesLH_zpsa84f696a.jpg

All in all a great pair for being 77 years old.

Dusty

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Didya ever find the rest of the parts ya needed? It'd be cool to see what you cook up... Let us know somethin'...

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Got the flywheels Truett & Osborn made special for this bike this morning. They are stock stroke with rod bores to take a Sportster rod pin and rods.I have decided that it's going to be a blown fuel 45 so it will run in 500cc AVBF .Still haven't found a front cylinder yet but have a very good rear now.

Dusty

2014-09-07144037_zps05868fe4.jpg

2014-09-07144113_zpsb8720e6a.jpg

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Dam near $500.00 worth of internal engine parts. Soon as I get a set of early Sporty rods the lower end can go thgether.

Dusty

OBTW no way on the BBO

2014-09-08130101_zps080e2f3f.jpg

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Has anyone here had any experience on running ceramic ball with steel race bearings? I'm thinking about them for wheel bearings, transmission bearings, supercharger bearings and the alternator bearings. Not gonna run them on the mains in this incarnation. They are pricey as hell but supposed to turn easier and last longer.

Dusty

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Seems like there was an article in the Horse last month about them. Sounded like a good thing to me.

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Seems like there was an article in the Horse last month about them. Sounded like a good thing to me.

Was a good article too

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I will bounce it off of a few folks first of the week. There are a lot of folks out of the office this week. BTW I still have your carb here sitting on my desk. I'll get it sent out Monday. I'm on my way out now for the rest of the day. Just wanted you to know I haven't forgotten, I'm just slow.

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I read the Horse article but anytime someone tells me that only one place knows anything about a subject I get nervous. The internet is full of lots of conflicting info and pages and pages ads. So I'm looking every where i can think of. It will be a heavy investment so I'm gonna look a while.

Dusty

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I spoke with our race manager. He was formerly the head of our Research and Innovation group. His take is that they are very good. We use them for the main bearings in our prostock engine. For your application though he feels that it is probably not necessary. The determining factor should be "will a standard bearing live in the application?" If so, then don't spend the extra money. The biggest limiting factor at Bonneville is traction and being able to get the power to the ground.in a usable form. Spend the extra $ somewhere else.

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Found a semi square base front cylinder that I might use since I have both style rears. Really wanted the late style square base because they are quite a bit stronger but I may go with it if nothing else turns up. got enough stuff to build the crank assy so will bolt it up and true it soon.

Will probably listen to the race manager the ceramics are dammed pricey still playing with the idea at least for the front wheel.

Dusty

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Found this on the porch when I gots home today! Thanks Crazy Cats!

Dusty

http://2015-01-27%2020.13.36_zpswryytu0q.jpg

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Sweet!!!! Didn't I read this is to be a blower motor? How will that work and what does the blower unit look like? Pardon my ignorance.... I know how an automotive setup works, just curious how you'll drive it. Belt? Gear driven?

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Sweet! Didn't I read this is to be a blower motor? How will that work and what does the blower unit look like? Pardon my ignorance.... I know how an automotive setup works, just curious how you'll drive it. Belt? Gear driven?

Sumptin similar to a turbo but driven by a chain from the crank and belts the rest of the way somewhere around1 to 9 speed increase. It will be draw through and right now I'm planing to inject the nitrous and methanol right into the blower intake.

Dusty

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You're very welcome. Id love to come see it run but I font don't think I'm going to make it this year again.

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