Congrats, Ace. Nothing but good can come out of this. Racing improves the breed!
Bigger picture please!
Nice Ace, now let's go kick some Manx ass!
It would be safe to say, if it hasn't already been said, that the "apple cart" has been upset?!! And some of those teams will soon have to swallow that hard pill!! It's always fun to see that sort of stuff, when they're at the top.... for what? ever? and here comes something from left field with a head of steam, just rolling on!
Finally, the delivery of the Big Head was finalized today, and it was signed for at Mondello's.So, I will check up on it tomorrow.Also, the "fixings" kit for the Big Head from Hitchcock has already arrived without any issues with customs.
Nice work Ace! 65bhp out of a 500 single is pretty damn tuff!
No Phillip Island results - what happened ? I am assuming there was not sufficient time to complete the build, but look forward to hearing of it's first proper race when everything is sorted out.
It was not an Ace piston, by the way.
It wasn't one of ours, either, just to be clear B.W.
It was a JP piston, couldnt take the power and cracked the skirt which ran through the hole crown then bit into the cylinder.
I wish he had discussed that with me. I am afraid that JP just doesn't make the grade for performance work. They are okay for a low revving plodder like a bone stock Bullet, and that's all. The low price doesn't turn out to be so low after it fails and takes out the engine.
I fhink he is looking at Forged pistons from a shovelhead, for cost vs strength.
That just seems silly. He already spent the money on the head job, why not just buy the piston FOR the head that is tried and tested to be a great piston? Especially after he already blew it up once with a sub-par piston?
Flow bench data for the head is interesting in that the intake flow is considerably greater than a 92 bore Summerfield Manx Norton, and the engine being compared makes just better than 60 rwhp on gasoline.The methanol will need a dash of Nitro to get up to that level!
We should soon be seeing how a Big Head behaves at up to possibly as much as 10,000 rpm. The build of a very different RE racing engine gets under way next week B.W.
Seeing as how the stress levels go up by the square of the increase in speed, that's going to be quite a feat unless a very short stroke crankshaft is going to be used. Long stroke engines with their large movement of the big end don't like high speeds.Come to think about it, piston rings and pistons don't like moving at high velocities either. Wishing him luck.
I cannot believe that BW intends to rev his engine for the express purpose of seeing the rev counter needle reach the 10000 mark on a dyno. Such action would amount to sheer stupidity, so I am certain that is not what BW meant.That the engine could momentarily survive such engine speeds is another matter entirely. There must be countless racers who have missed a gear and been alarmed to see the rev counter needle disappear, only to breathe a sigh of relief when the engine continued running. The inertia forces as applied to a 90 mm stroke engine running at 10000 rpm are colossal. Assuming a piston weight of 525 grams (same as a Summerfield Manx item), the force trying to fly off the conrod during the overlap period is greater than 3 imperial tons, and under such stress a pressed up crankshaft will try to behave like a skipping rope. I cannot comment on the valve gear as I know nothing about the arrangement employed, but will be surprised if any valve springs can keep the valves under control when lifts of up to 16 mm are employed. At 8500 rpm yes, but not at 10000, unless of course it's a missed gear situation, and then my earlier comment applies.
I remember seeing Paul's older 350/500s which used to redline around the same rev range. So far all I have heard about him is - Winning races, hopefully this one will go well too!
Page created in 0.124 seconds with 31 queries.