First time I've seen triple Linkerts
Not sure I can see linkage to center one though
Racing action
Highly modified Knuck. Click the link to see closeups of the motor
While doing a little research on early motorcycle drag racing I cam across this site with pictures from 1964 Lions Drag Strip. I thought it was pretty cool and thought I might show you a couple teaser pictures to entice you to click. The name of the site is HotRods Bikeworks.
First time I've seen triple Linkerts
Not sure I can see linkage to center one though
Racing action
Highly modified Knuck. Click the link to see closeups of the motor
First time I've seen triple Linkerts
Not sure I can see linkage to center one though
Racing action
Highly modified Knuck. Click the link to see closeups of the motor
In a previous post regarding my interest in building a nostalgia dragbike, I told of my purchase of a blower that had been used on a Knucklehead dragbike here . After receiving the blower and through further discussion with the party I purchased it from, I was put in contact with the original owner. I hoped that I may have purchased a part that came from an old dragbike which it might be possible to re-create. It had not really even crossed my mind that it should be a significant piece of drag racing history. Of course that would have been a plus, but I would have been quite satisfied just to find that the blower was from a '70s or earlier dragbike that had a little local history.
Well, I must say that I feel as though I have hit the mother lode! Not only is the blower from a bike with a history, that history goes back to the very beginning of organized drag racing itself!
As stated in previous posts, this S.Co.T. blower came off of a Knucklehead dragbike named the Gorilla, owned by Don Jones. A Google search really didn't give me any info on the Don Jones I was looking for, at least that is what I thought. The name came up in regards to motocross; obviously a different Don Jones. Wrong! When I called Don, he told me that he was pretty busy for the next few weeks since a documentary was being done about he and his family's involvement in the origins of motocross racing.
It seems that Mr. Jones has a history of being involved when and where racing history is being made. Apparently his bike, "The Gorilla", was only one of a pair of Knuckle dragbikes running out of his motorcycle shop in 1949 and the early 1950's. The other bike was Chet Herbert's "The Beast"! The dragstrip they frequented was Santa Ana, which, from what I understand, was the first track to ever have a weekly drag race schedule.
Now "The Beast" is one of the most famous of the very early drag bikes. Of the first 19 events held at the Santa Ana strip, The Beast ran the meet's top speed 6 times (this included both bikes and cars). There is a some irony in the fact that the Knuckle dragbike which I campaigned in the mid to late 1980's was also named "The Beast", but that is another story, for another time.
In speaking with Don Jones via the telephone recently, I found him to be a veritable treasure trove of information about these early dragbikes. With absolutely no hesitation he was able to rattle off details even down to the number of teeth on each sprocket of these bikes. Wow. I must admit that many of the details from my own racing career are fading fast, and those are from only 23 years ago.
You can bet that I was taking notes as quickly as I could while Don told me a little about The Beast and The Gorilla. A few of the notes I made are as follows:
- The Gorilla was a single carb 80 cubic inch Knuckle with a blower
- The Beast was a dual carb 92 cubic inch Knuckle using Indian Chief flywheels
- The Beast was in a VL frame and ran a VL springer fork
- The Gorilla used parts of a Matchless frame and used a BSA front fork
- Transmissions were modified Harley using only 3rd & 4th gear
- Both bikes used Panhead cylinders due to weakness of the Knuck barrels
- They used '36 -'37 cylinder heads due to smaller combustion chambers giving more compression, and installed 2 1/4" intake valves
- They used the Harley 1936 61" cam, which Chet Herbert later made a direct copy of for performance use
Obviously all of this gives me plenty of food for thought. I would absolutely love to build a replica of either of these bikes. How "correct" I can build one is the big question. I have the actual blower from The Gorilla, but duplicating the frame may be tough. On the other hand I have a nice set of dual carb Knuck heads and a VL frame and front fork, which points toward The Beast being an easier bike to duplicate. Of course, having a few of the original pieces from The Gorilla point to that being the better choice. Of course a limited budget will have a bearing on either choice. Decisions, decisions.... more to follow....
Sacrifice is an important theme throughout the Bible. This past Sunday morning at the Donnie Smith Bike Show in St Paul, my wife and I attended a short service put on by the St. Cloud chapter of the Bond Slaves MC. This is a group of Christian bikers who I have had the pleasure of getting acquainted with through this show. Bruce, one of their prospects, delivered a fine sermon drawing parallels between the sacrifice of Christ for our freedom from sin and the servicemen who often are called upon to sacrifice themselves for our freedom.
The fact that Jesus went willingly to the cross, suffered and died for us is incomprehensible to some, but in reality it is not an act that is unheard of. The stories of soldiers who have given their lives to save their buddies is not such an uncommon one. Most parents would die in place of their children. Consider that terrorists all too often sacrifice themselves for a false god.
What really struck home to me, though, was the picture Bruce painted of God the Father, knowing the torture his Son would endure, still sending Jesus to be sacrificed. One of the points that Bruce brought out was that the parents of these servicemen are also facing the very real possibility that their own sons or daughters may die for their country. That of course is where the analogy breaks down. Parents of servicemen are always hoping and praying that their loved ones will not have to suffer or die for their country. God the Father willingly sent his Son knowing full well that he would suffer and die. That's a love that is difficult for us to fully grasp!
Remember to pray for our men and women in uniform and their parents and families!
The fact that Jesus went willingly to the cross, suffered and died for us is incomprehensible to some, but in reality it is not an act that is unheard of. The stories of soldiers who have given their lives to save their buddies is not such an uncommon one. Most parents would die in place of their children. Consider that terrorists all too often sacrifice themselves for a false god.
What really struck home to me, though, was the picture Bruce painted of God the Father, knowing the torture his Son would endure, still sending Jesus to be sacrificed. One of the points that Bruce brought out was that the parents of these servicemen are also facing the very real possibility that their own sons or daughters may die for their country. That of course is where the analogy breaks down. Parents of servicemen are always hoping and praying that their loved ones will not have to suffer or die for their country. God the Father willingly sent his Son knowing full well that he would suffer and die. That's a love that is difficult for us to fully grasp!
Remember to pray for our men and women in uniform and their parents and families!
Just to add a little more info on the blower I "won" on eBay. The gentleman I purchased the blower from tells me that it was on a Knucklehead drag bike named "The Gorilla" owned by Don Jones of California. I understand that there are pictures existing of the bike, but whether I will be able to obtain copies of them is still up in the air. That's about all the information I have so far.
As it turns out, when it arrived, I found some lettering stamped into the front bearing housing. S.CO.T. and under that the number 101. This is all stamped on a slightly raised "boss" that looks to have held a "serial number" type plate at one time. If there was indeed a plate there at one time, it would have covered these stamped letters. I am guessing that the 101 is a reference to the size of the blower.
The little that I know about S.Co.T. blowers is that they were a company that built supercharger kits for various engines in years gone by. I have seen them mounted on high end vintage style hot rods with Flathead Ford V-8s. The initials stand for "Supercharger Company of Turin"
Fabricated carb to blower manifold
One manifold (carb to blower) is obviously fabricated from steel, and I must say rather ingeniously at that. I doubt that I would have thought to make it out of sheet metal in a rectangular shape instead of struggling to get round tubing bent to fit.
The other manifold is cast aluminum, and though the center to center distance on the ports is in the ballpark for use on a set of dual carb Knuck heads, it likely was built by the supercharger manufacturer as a bolt on kit for a different application. The ports on this manifold are too small to match up with a Knuckle, being approximately 1.060" wide by 1.200" tall. A Knuckle port is round and 1.565" diameter stock.
Blower with both manifolds
Still, I might have concluded that the manifold was used on a Knuckle despite the size discrepancy were it not for the fact that the flange bolting the manifold to the blower is rectangular which limits the direction the blower could be mounted to facing forward or backward, but not sideways. That means that the pulley on the front of the blower would be at a right angle to crankshaft. Not very likely it would have been mounted in that orientation given the complications to driving the blower it would entail.
Another clue, is the fact that the gentleman I bought this blower from tells me that he also has a 2 speed racing transmission from the same dragbike. He told me that the trans case doubled as an oil tank. Very interesting! The size of the blower makes me think that a guy could tuck it in about the same space as a horseshoe oil tank would occupy. That would put the pulley on the blower in the same plane as the engine sprocket, making the drive comparatively simple. It would also explain the "S" shape of the carb to blower manifold. My guess is that there was originally a similarly fabricated manifold going from the blower to the heads.
More to come!
Nostalgia. Nearly everyone is infected with it to a certain degree. Whether it is a passion for the things from their childhood, or just antiques in general, the sense of nostalgia seems to spring from a yearning for the good old days. Those of us who are involved with motorcycles are no different. Now if you take a guy that has been riding motorcycles for 35+ years and drag raced for nearly a third of those years, then I guess it shouldn't be too hard to figure out where his nostalgic urges might lead.
Now when I was active in drag racing, beginning in 1986 I raced a Knucklehead. Guess that means that I had a head start on the nostalgia thing, what with heads on my drag bike leaving the factory prior to 1947. Yep, that means I was working with equipment 40 years out of date. This self imposed handicap had way more to do with the "cool factor" and my ongoing love affair with Knuckleheads than any kind of common sense. Still, I was lucky enough to start racing at just the right moment in history to win national championships in '85 and '86 in two different classes. Had I started later, the potential of the Evolution cylinder head would have made it impossible. Earlier and I would have had to compete against an earlier generation that seemed to get amazing results despite the comparative lack of technology.
I have been toying with the idea of building a nostalgia Knucklehead drag bike for quite a few years now. Something to mimic the bikes raced in the '50s or '60s would be just about right. Somehow I managed to hang on to a set of dual carb Knuck heads that appear to have been built "back in the day." The holes drilled in the cooling fins along with the big intake valves and porting work make me think that they have seen some drag strip action sometime in the distant past.
Vintage Dual Carb Knuck Head
So you can only imagine how intrigued I was a couple weeks back when an auction for an "Antique Harley Knucklehead Blower and Manifold" came up on eBay. From the pictures it looked as though it might even be a S.C.oT. blower. While I am far from an expert on them, I have seen them in magazines on vintage style hot rods. Though the seller said he saw no name on the blower, its age was pretty evident. Still, I likely would have passed on it, had it not been for the fact that I sold a top end on eBay at the same time. Fittingly, what I sold to pay for the blower were the heads, cylinders and pistons from our son Joey's drag bike. We had upgraded to aftermarket heads and big bore cylinders long ago which left these parts in need of a home.
eBay Blower Find
I am happy to say that I was successful in "winning" the auction despite several other bids. Best of all, I paid less than what I sold the top end for. Stay tuned for more on the blower, the history I am learning about it, and my tentative plans for it.
Now when I was active in drag racing, beginning in 1986 I raced a Knucklehead. Guess that means that I had a head start on the nostalgia thing, what with heads on my drag bike leaving the factory prior to 1947. Yep, that means I was working with equipment 40 years out of date. This self imposed handicap had way more to do with the "cool factor" and my ongoing love affair with Knuckleheads than any kind of common sense. Still, I was lucky enough to start racing at just the right moment in history to win national championships in '85 and '86 in two different classes. Had I started later, the potential of the Evolution cylinder head would have made it impossible. Earlier and I would have had to compete against an earlier generation that seemed to get amazing results despite the comparative lack of technology.
I have been toying with the idea of building a nostalgia Knucklehead drag bike for quite a few years now. Something to mimic the bikes raced in the '50s or '60s would be just about right. Somehow I managed to hang on to a set of dual carb Knuck heads that appear to have been built "back in the day." The holes drilled in the cooling fins along with the big intake valves and porting work make me think that they have seen some drag strip action sometime in the distant past.
Vintage Dual Carb Knuck Head
So you can only imagine how intrigued I was a couple weeks back when an auction for an "Antique Harley Knucklehead Blower and Manifold" came up on eBay. From the pictures it looked as though it might even be a S.C.oT. blower. While I am far from an expert on them, I have seen them in magazines on vintage style hot rods. Though the seller said he saw no name on the blower, its age was pretty evident. Still, I likely would have passed on it, had it not been for the fact that I sold a top end on eBay at the same time. Fittingly, what I sold to pay for the blower were the heads, cylinders and pistons from our son Joey's drag bike. We had upgraded to aftermarket heads and big bore cylinders long ago which left these parts in need of a home.
eBay Blower Find
I am happy to say that I was successful in "winning" the auction despite several other bids. Best of all, I paid less than what I sold the top end for. Stay tuned for more on the blower, the history I am learning about it, and my tentative plans for it.
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