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Post by mikea565 on Jan 7, 2008 21:54:55 GMT
This thread is like a good soap opera, I open it each day to see if anyone has been buried under the patio. ;D
Is that popcorn above me ?
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Post by joshpsmsc on Jan 8, 2008 2:30:42 GMT
It's almost like reading the crap that is post on the International BBS, soap opera wise.
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Post by adspeed on Jan 8, 2008 9:20:11 GMT
So you and Harry Barlow don't agree on eveything hey......can't believe that!! ;D It wasn't him!
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Post by hank on Jan 8, 2008 10:22:34 GMT
could be the longest post at this rate ;D
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Post by swallow on Jan 8, 2008 15:50:49 GMT
wowee, this is a mass debate that has gone way over my head Interesting reading though for those new to scoots, never knew how much could be done to engines!
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Post by soosh on Jan 8, 2008 19:58:45 GMT
Just out of interest now,why did you go for a reedvalve now and just not use rotory valve if not wanting to go that fast?
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Post by tony on Jan 9, 2008 0:36:19 GMT
hey rotaries can go fast too!
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Post by unreliablesc on Jan 9, 2008 16:03:54 GMT
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Post by soosh on Jan 9, 2008 19:39:02 GMT
I know,mine was rotary and fucking flew.Could nevery use on the road as had a dirty thirty and drank!!! But its a lot less hasle than a reed and still gives good beans as you say.
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Post by tony on Jan 9, 2008 22:00:00 GMT
my grp4 race motors are rotary. They can be made to go well.. as for economy.... er...
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Post by knowledge on Jan 9, 2008 23:18:43 GMT
Just out of interest now,why did you go for a reedvalve now and just not use rotory valve if not wanting to go that fast? Rotaries do work really well. I know that Tony's Gp4 makes excellent power over an impressive rev-range, but I think I have worked out how Tony has done this, and it sounds like a lot of work. It also requires a lot of experimenting. Whilst a rotary valve has some characteristics of a disc-valve, with optimised opening and closing times, it does take some effort to find the best port timings. This can be expensive and we needed to fit to a budget. Rotary valves port size is dictated by the width of the crank web, which makes ports narrow and somewhat restrictive. The advantage of the reed valve is that the port can be opened up beyond the width of the crank web, improving flow into the crankcase. Futhermore, where the rotary valve has to open and close at fixed points on the rotation of the crank, the reed induction system can deliver fuel on demand. If the exhaust is well suited to the engine's pumping action, it can suck fuel/air into the top end of the barrel directly through the engine. This boost of fuel aids the power band significantly. The engine can only do this at certain rev-ranges, and only because the reed is free to open as soon as there is a drop of pressure within the engine loop. The aim to make this scooter go fast, but also to learn from, and enjoy the development. Get some more popcorn, cos there'll be more tales from the homestead soon.
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Post by knowledge on Jan 9, 2008 23:27:00 GMT
So I modified the exhaust last night. The wheel can now be fitted with the header pipe in situ, which is good news. I altered the bracket as well and the exhaust is secure. I have given it some more paint. The exhaust comes rather close to the wiring for the voltage regulator, so we might extend the loom by a couple of inches to stop any risk of chaffing. That was at midnight last night.
A club meeting has stopped us playing tonight, and Will has been cramming from some exams tomorrow.
Perhaps Thursday night we will have the scooter fully together, as long as the carb sits comfortably in the frame.
Did I mention that we are installing the engine while the whole scoot is upside down? It seemed like a good idea, until I got to thinking about how we are going to get it the right way up. Still, the installation of the control cables was a doddle.
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Post by tony on Jan 10, 2008 0:03:25 GMT
Did I mention that we are installing the engine while the whole scoot is upside down? It seemed like a good idea, until I got to thinking about how we are going to get it the right way up I've thought long and hard about this Martin and finally I've got it!!! You pick it up and turn it over!!! ;D ;D ;D
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Post by knowledge on Jan 10, 2008 0:09:15 GMT
Arrrrh. However, the scoot is now considerably heavier than when we turned it upside down and I have a back that is fecked (probably as a result of sitting at this computer until after midnight). Still, nice to know your worrying about my problems in the wee small hours.
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Post by tony on Jan 10, 2008 0:11:49 GMT
i like to offer simple solutions to complicated problems. When do you think it'll be fired up martin?
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Post by tony on Jan 10, 2008 0:13:08 GMT
besides, this is early for me ... i dont normally get on here til 1 or 2am after i finsh work.
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Post by adspeed on Jan 10, 2008 9:11:34 GMT
....... ;D ;D ;D
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Post by tony on Jan 10, 2008 10:36:51 GMT
........... ;D
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Post by tony on Jan 10, 2008 11:30:33 GMT
what the hell am i doing heeere...
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Post by adspeed on Jan 10, 2008 13:39:47 GMT
I don't belong here...
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