Aclass fukeruperer
That is an awesome piece of engineering.Originally Posted by husaberg
You may have spotted this before TeeZee but I know you have mentioned about using another engine/cylinder to supercharge the drive engine, here is what someone made out of a Ducati. http://thekneeslider.com/archives/20...le-conversion/
Some really cool stuff on there (probably old news to alot of you)..... the X4 500cc two stroke, the 'XJ500T' - a 3cylinder homebuilt version of Hondas upside down GP bike.
Anorak
The most interesting bit of the V one I think is the air storage system. Food for thought.
I hadn't seen the 3 cylinder upside down but I wonder about the handling with the crankshaft so high it would flick in good but i would be a bugger to get up again.Snow have a google at a Puch split single for the self charged 2 smoke.Twingle?I seem to remember a prewar v DKW v3 with the front down cylinder serving as pump piston.
56 users browsing the thread crickey, TZ and the rest of Team ESE. You are now famous.
Whats happening with the Attac TZ and the RGV100 Wob
Kinky is using a feather. Perverted is using the whole chicken
Forum whore
I have been enjoying all the latest posts, people are posting some interesting stuff.
Puch split single, I remember those, a guy down the road had one, he was the first in our area to have a motorcycle.
The ATAC, I am hanging out to try it with the pumper. But the dyno is in the middle of the w/shop and is too disruptive to use when there is real work going on.
Anorak
Wobs mentioned DR Joe earlier on he spent a fair amount of time playing with them.
for sure you are going to try the atac and the pumper separately for us tz?did you notice the 56 users.
I did draw up a kind of split single with two outer rods holding a pump piston upright in a v twin formation. With the crank pins at 90 degrees so they were timed together about 20 years ago.I looked at it the other day as it was in the book with the pumper carb notes I sent you.I think It would have pumped a lot of fuel probably all out the exhaust.It probably would have knocked my fillings out too.
Kinky is using a feather. Perverted is using the whole chicken
Forum whore
Pictures from the last Mt Welly meet taken by Damien http://www.flickr.com/photos/dty1/se...078173/?page=3
I saw your post about the 56 users, bit hard to believe that many people are interested.
I plan to take a step by step approch starting with an as is base run with the current setup as it may have faded a bit after its outing at Mt Welly.
Sorry, I confused the names, the exhaust ATAC is not finished, I mean to try the pumper with/without the inlet Vtec after getting an as is base run.
I need to sort the inlet ASAP because at the moment, sticking out the side like it does its vunerable to damage and sucking up dirt in the event of a crash.
When I get to try it, it will be pretty clear if the ATAC extends the lower power spread or not.
Forum whore
So would this Ducati still be classed as 1000cc?
ie if you were to do this with say a VT250 would it still be a 250 or 'Bucket legal' 125as it only has one cylinder that actually fires???
Forum whore
The rules cover it pretty well, it is supercharged so would need the working cylinder sleeved to 100cc. VT is pretty big lump of metal, I think there are easier ways to make flash buckets
My neighbours diary says I have boundary issues
Forum whore
Yeah the VT was just an example and they are piles of shit to begin with.
What I was getting at is, on a 200cc twin 4t that has one cylinder converted to be a supercharger, would the supercharger cylinder still be counted in the overall CC'c of the bike as it is still a piston connected to the crank and is helping with the production of power whereas a 'normal' supercharger is outside of the actual engine.
I doubt if this will ever be an issue, just curious.
No8 Wire Extraordinaire
There's no smoke without fire, so just as people run 450 triples in F3 by taking off one plug injector etc from a GSXR600 or R6then I don't see any issue. Still be a pants way of supercharging though & good luck finding a VT250 with 2 working cylinders. Wheelies wouldn't be a problem though.
Don't you look at my accountant.
He's the only one I've got.
Forum whore
Except in your F3 examples the 4th cylinder is effectively dead whereas if you converted said cylinder to a power enhanceing/producing supercharger would it then count to your total CC?
No8 Wire Extraordinaire
no sparkplug. It isn't producing any power, just sapping it.
PS you'd want this type of compressor running at engine speed to be bigger volume else no compressing would be going on, you'd just be passing it from one cylinder to the next before then burning it.
For example; if you made it 150cc big, compressed into a 100cc volume you may make as much power as a 150cc normally aspirated engine. . . with a dirty great dead cylinder to drag along.
Don't you look at my accountant.
He's the only one I've got.
Forum whore
If you used a VT for example the working cylinder is 100cc the supercharging cylinder is 125 but the supercharging cylinder will pump aprox 250cc of air per 720degrees of crankshaft rotation (1 4t cycle) sothere is a significant spercharging bizzo going on here cos you are trying to jam that 250cc into a 100cc hole, could be awesome, go on Dave try it !
My neighbours diary says I have boundary issues
Low personal B.M.E.P.
It's possible - but rather pointless.
Given your hypothetical VT250 with the power cylinder sleeved to 100cc...
remember it's a 4 stroke so the power cylinder fires every 2 revs.
The pumping cylinder can compress twice in this period - compressing into a plenum chamber theoretically giving a boost exceeding 1 ata. at the power cylinder intake.
Frictional losses would be enormous....pointless.
Better to do it properly - car a/c compressor geared up on a CB100 would be fun.
Been there with blown motors. Plenty of HP but weight goes up unless you can afford to cast stuff in magnesium.
No8 Wire Extraordinaire
Ah yes 4 stroke, - bloody silly things they are - I denounce them.
Course you could create a reasonable cheat bike by using a bigger cylinder to push the gas through some hidden inlet ports direct into the cylinder, fit pegged pistons, route the exhaust out the valved ports & change the cam timing so every 360 the valves all open 80 degs after TDC. Still be pretty miserable, but a 2 stroke at least.
Wonder what that would sound like?. Probably a smokeless super high revving 4 stroke as you would not be opening holes in the side of the barrels to let out gas. Wonder how long before anyone noticed what you had done if you made the transfers embedded enough in the V.
The extra exhausts (from inlet valves) could be hidden in a manifold that made it look like the link pipe to the compressor cylinder but really exited into a shared muffler for the exh ports.
Don't you look at my accountant.
He's the only one I've got.
Anorak
Speedpro has one which will work.No idea what rod he will use though.Shhhhh..,,
But guys as much as it hurts to say this. I agree with Dave TWO STROKES
I only used the Diesel stuff as an example of layouts and examples of balancing.
RE Daves bit above,
Someone once said the Oval piston NR500 sounded exactly like a two stroke v4 500 as it was revving 2x the speed and the frequency was the same never heard one so not sure come to think of it never seen let alone herd a nr750.But I have sat on a RC30 and I do secretly covert an Aermacchi. Amen
Also I have been coping the odd ribbing about my Husaberg tag. For the record my Husaberg has reed valves and is based on a husky two stroke bottom end I and I consider it a honorary two stroke as it beat the 2 strokes in a fair fight eg 500's vs 500's in MX and Enduro's before the rules were stacked in favour of the diesels. Exit soap box
Kinky is using a feather. Perverted is using the whole chicken
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