Its making that 4 stroke look pretty shabby. Nice work.
No8 Wire Extraordinaire
Its making that 4 stroke look pretty shabby. Nice work.
Don't you look at my accountant.
He's the only one I've got.
No8 Wire Extraordinaire
I'm not one with a propensity for swearing; but look at those cunting mother ball slapping fukn ex sub ports.Originally Posted by kel
Jiminy Cricket they are big.
I suppose when you don't care about what happens at 10,000, short ccting isn't an issue.
Don't you look at my accountant.
He's the only one I've got.
Forum whore
Yes, dead right the STA numbers havnt changed at all since the theoretical work was published out of Queens in Belfast by Blair etal.
But Thiels comments about the ports is a bit misleading really.
Aprilia completely changed the whole layout from previous 3 port geometry.
Instead of the main port being right at the 72% limit, they reduced this to 68% and dropped the main transfers below the rest.This enabled the large secondary Ex ports to be added, plus gave room to pull all the transfers around and create more area with less timing.
What this lead the way with,is being shown all the time now in the sims I run, that the Ex STA means jack shit,Blow STA is everything.
The powervalve cranks up the power at 10,000, but despite what Frits says about reeds not working well at low rpm/WOT operation, the KTM and Honda factory engines still nailed the Aprilia/Derby with off corner acceleration.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
Forum whore
Faw...rk ... Attachment 231402 ... a 25hp 4-stroker with a long liner power spread, now what am I going to do?????Well, yes, good idea, by hand feeding it bits of FXR, the taste for blood could make the Monster GP go harder ......
Forum whore
Dad's got me and Thomas dialling in his bike on the dyno.
Blue = new side port cylinder, Red = Old cylinder
Starting to clean the power curve up nicely but the clutch slip has come back......
Forum whore
So close to the magic number. Nice work. It would be interesting to do a back to back with my bike when the new engine is back in.Dad's got me and Thomas dialling in his bike on the dyno.
Blue = new side port cylinder, Red = Old cylinder
Starting to clean the power curve up nicely but the clutch slip has come back......
2 weird 2 live, 2 rare 2 die.
Comparing costs/hrs involved would be interesting too.
Forum whore
might be interesting but not really relavent, you cant win a race on a three legged horse, some people think thats what buckets are supposed to be , but they wrong
My neighbours diary says I have boundary issues
In the riders seat
What if it was a race for three legged horses?
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
2 weird 2 live, 2 rare 2 die.
I think it's entirely relevant.
For those that aren't clued up on the ins and outs of building competition engines.
Like me.
Forum whore
cost hours devided by 4 bikes is not all that much
but it's the ideas you need !
and being open minded about new idears
(that copper dosent look so silly now)
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
Forum whore
I was more thinking of comparing dynos. They are not all created equal.
Cost/hours just equals lots. Best not think about that. Its all just fun playing with motors.
Forum whore
that would be telling indead
and if your bike is ever up this way I'm sure they would love to put it on the dyno and see what the difference realy is
I'm sure there would be a few interested people out there
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
Forum whore
230+ pages is a bit of a clue.........
It always seems to cost more than it should and take longer than one wants, but once we have figured it out, making copies for the rest of the team is usually much quicker and fairly easy.
Books and the net have been explored for pointers and anything seemingly worth while posted here.
All the cost and effort is in following up on ideas sorting out the good ones.
The engine and chassis work has mostly been done with basic hand tools, the sort of thing a home handyman might have.
And everything we have done has been posted on this thread, so pretty much anyone interested in 2-Strokes can copy it if they want to.
For us things started to move ahead when we realised the importance of BlowDown-Time-Area.
Long Haired Yobbo
That teamwork shit you guys are into will always serve you very well. seriously.
Heinz Varieties
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