slimslowslider
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WZ507 said:
+1
High hopes
- Thread starter comnoz
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If we had separated two strokes from four strokes in road racing back in the 60s, we'd still be developing manx nortons today and competing against very different other types of racing machines. For me road racing is not so much about winning races, it is about machine development. It is really beautiful hobby which appeals to my scientific brain. Jim's computer programme which predicts outcomes from changes to the engine, is probably as important and the development of engine management systems. The best thing which ever happens to me is when I modify my bike, and it either goes faster or handles better - I feel that I have achieved. I spent my whole working life finding better ways to kill people, the trouble is that as a scientist you are always remote from the final product, which you can only really see perform properly on a battlefield. The standard Norton Commando motorcycle is severely underdeveloped and offers the opportunity to provide fairly comparative outcomes on a level playing field. Buying a 961 is like having the opportunity to fight the Battle of Britain in a realistic recreation with Spitfires and ME109s, and turning up with the latest stealth fighter.
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WZ507 said:
Still 80hp from a push rod twin under 1000cc is not that bad.
No not bad at all and pretty much unachieveable with an original Commando, unless you put the original engine aside and start again as Jim has done, and as Kenny C did to get the 961 design going. I imagine it has been done with the occasional race bike for short time use, but to make 80 HP from one of our engines and get reliability plus longevity, not likely.
Glen
Glen
comnoz said:Roadrash said:I'm assuming the displacement is 914cc? Those would be very impressive numbers for sure. 76 foot lbs. will get up and go!
Yes, 914 cc from a 91mm stroke and an 80mm bore. Jim
Hi Jim,
The std transmission will not keep up with a 50% increase in torque. Are you fitting a TTI gearbox or something else?
-Knut
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mdt-son said:comnoz said:Roadrash said:I'm assuming the displacement is 914cc? Those would be very impressive numbers for sure. 76 foot lbs. will get up and go!
Yes, 914 cc from a 91mm stroke and an 80mm bore. Jim
Hi Jim,
The std transmission will not keep up with a 50% increase in torque. Are you fitting a TTI gearbox or something else?
-Knut
I am working on something else.
I would use a TTI but first gear is too high for easy use on the street. Jim
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comnoz said:
*arley? That's what Kenny ending up having to use.
Matchless
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Jim,
If you did want to use a TTI 'box it would be quicker to make your own. I paid in full for mine in early November. They told me to expect a six week delivery. Still no sign of it & they don't even respond to my emails. Beginning to worry.
Martyn.
If you did want to use a TTI 'box it would be quicker to make your own. I paid in full for mine in early November. They told me to expect a six week delivery. Still no sign of it & they don't even respond to my emails. Beginning to worry.
Martyn.
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Geeze louise why always a Harley recoil when they are our close kissing cousins we have so how'd ya react if a H--da tranny got Kenny going instead? Vintage rallys are like church pick nics compared to the Harley parties. Open pipe Norton can about match em in thunderous loud exhaust notes too. Any who the predicated torque would definitely put a candy cane strain in AMC shafts.
I believe Quaife makes several versions of the Norton AMC gear clusters and complete heavy duty boxes. I can't find the ratios right now, but they had at least one kick start five speed with a decent useable low geared first ratio, made for road bikes.
I got a Quaife complete speed cluster with shafts,shifter forks ,cam plate and bevel gear the Project bike, it was reasonable at just over 1,000 GBP. They offered a choice of high first or low, I went for low.
Glen
I got a Quaife complete speed cluster with shafts,shifter forks ,cam plate and bevel gear the Project bike, it was reasonable at just over 1,000 GBP. They offered a choice of high first or low, I went for low.
Glen
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I suspect that changing the first gear in a TT1 box is only a matter of replacing one pair of gears. My 4 speed CR box had an impossible first gear for a clutch start after I had raised the overall gearing enough to use the torque increase I'd achieved. I wasn't smart enough to install just a low first gear. The bigger step between first and second is not important once the bike is rolling. You usually would not go below the second gear of a CR box, unless you come to a stand still.
One thing I've found with my 850 is that gearing is very deceptive, the motor will pull harder than I ever expected and every time I've increased the overall gearing the bike has gone faster and I still have no appreciable lag after every gear change. It always seems to spin up through the gears at the same rate. I hate to think what happens to the clutch and mainshaft when I have given it the big handful off the line using that extremely high first gear. It is only the first few feet of a race, however it is so important that you don't lose much ground.
One thing I've found with my 850 is that gearing is very deceptive, the motor will pull harder than I ever expected and every time I've increased the overall gearing the bike has gone faster and I still have no appreciable lag after every gear change. It always seems to spin up through the gears at the same rate. I hate to think what happens to the clutch and mainshaft when I have given it the big handful off the line using that extremely high first gear. It is only the first few feet of a race, however it is so important that you don't lose much ground.
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If space to fit cogs they will custom any ratio you can pay for. Megan sent the ratio's to fit Peels expected needs and torque band though did not say what drive sprocket gave these figures and I've not calculated it so will just start with 21T and see how she does. My high hopes ...
Ratio's:
1'st 2.67 60mph
2'nd 1.46 110mph
3'rd 1.21 132mph
4th Direct 160mph
Ratio's:
1'st 2.67 60mph
2'nd 1.46 110mph
3'rd 1.21 132mph
4th Direct 160mph
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Title of this thread "High Hopes" - I thought maybe you were playing on words Jim, what with being in pot legal Colorado.
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Not a public subject to discuss as still illegal most everywhere else but the visitors have driven prices out of sight so must wait for the private growers crops to come in and I"m told a whole lot of clones getting carried out of legal zone. Medical insurance policy's may not go though if public evidence of non covered substances is found. Still nice to reflect on some states of deep thinking-feeling with organized thoughts flowing in slow enough sequences to actually act on to em. Peel partly inspired by fungal growths in cow doo doo and concentrated yeast byproducts the area is famous for. I hope Peel's one in a row oil paths work as imaged-in.
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