Tom,
What a great video to start my Tuesday! So that is your top end combo on that vintage RE?
He ( the rider of the RE) was not short of horsepower, and if he was running with 2cycles bikes I am very impressed. He looked as if was gaining a bit on the bike in front of him, but that could have been rider technique. When you are that equally matched, you can't miss a beat.
Yes, we did all the head work, and consulted on the other parts. It has the vintage "Big Head" casting which was on the original RE Fury version of the Bullet. We high-ported it for 8250 rpm and 265 cfm intake flow, installed bigger valves and our special valve spring package wit high lift capacity, and modded the head to accept our custom high ratio roller rockers for .609" lift at the valve with his vintage Harmon & Collins race cams. The head can support about 55hp in its currentform, but could support over 60hp with a shorter stroke and higher revs. I am trying to talk the owner into a short stroke modification.
Anyway, about the other bikes in the race, they are all 4 cycle machines, but they are revving pretty high. The G50 engines turn almost 9000 rpm, and our Bullet only reaches about 8200 rpm because of the Bullet's 90mm stroke. But, it does very well anyway, and it is the fastest Bullet 500 with the 84mm x 90mm bore/stroke dimensions in the world. To match the modified racing G50, the stroke would need to be shorter and the bore larger.
We have beaten all these G50 Seeleys and short stroke Manxes during the course of the season, but they also beat us. We ended up 3rd in the points championship, ahead of all the Manxes, but two G50 racers finished ahead of us.
I think it did remarkably well for a Bullet, among the fastest $50k racing 500cc singles on the planet.
Our Bullet is the only long stroke pushrod engine out there in contention, among a bunch of overhead cam short stroke racers. And we are competitive against them.
Regarding the riding, I try not to be critical about that because he does well in general. There are a few things that could be "Monday morning quarterbacked" but he makes the decisions on the track, and I am not going to 2nd-guess him.
Overall, I am happy with the results.
Topic: horse power (Read 22613 times)