Forced induction 100cc

[Sketchy_Racer]

So as i said about 30 pages back, one step sideways, one step back, half a step forward....normal progress on a blower installation.

Bigger blower running slower and a basic draw through layout...At least it may see a track in that configuration. Make that work with usable boost levels then refine it...

So far, you and a lot of others have learned a lot from this. Your machining and fabrication skills have been developed. It doesn't seem to have cost you a lot of dosh either...Carry on.

Yeah it's certainly having an open minded development!! Either way me and Kyle are having heaps of fun mucking around and as you say learning heaps which is just as much fun!

[Sketchy_Racer]

So here's the video that was on facebook. This was the very first fire up with the new config, so jetting is a mile out on WOT but runs really well all things considered. Very responsive to throttle!

And we would have even done a power run if some numpty (me) hadn't left the clutch bolt loose thus rooting the basket. Oh well new one is here and only cost $40!

Hope to have the first power runs happening this week if all goes well. Just need to find some E85 somewhere aye

[TZ350]

I love the flames from the exhaust, and it sounds hungary, good work, I am looking forward to seeing it out on the track. LOL hopefully you can get a rule change for the 85 as I would love to use it myself.... ... no wait I am actually doing something better.

[Flettner]

Like I said, "back in the day", 100cc fourstroke was unlimited including fuel. Should go back to that rule.

[Grumph]

Like I said, "back in the day", 100cc fourstroke was unlimited including fuel. Should go back to that rule.

I agree completely. i walked out of the MNZ conference when alky was banned except for BEARS and Classics. I'd been involved with the top F1 bike in the 2 previous years - running alky blends. Banned because we were too successful. Nitro needed banning, yes - but they threw everything out at the same time. crap.

[speedpro]

I've had many conversations with MNZ people a long time ago about the alcohol ban. I never could get a logical reason why it was banned. A lot of knee jerking about a particular event which probably would have happened if petrol had been in use.

How many people on this forum have seized an engine on petrol? Not like methanol is unique in that regard. In fact it is likely less of a problem as you can run it rich with only minimal reduction in power so there is no major benefit running it on the edge.

I had no personal agenda getting the rules changed as my bike was permitted methanol in it's class. It was just an idiotic rule in my personal opinion.

[TZ350]

As Buckets is a technical development class I would love to see fuel completely open, with anything goes ..... then we really could have some fun, I expect most projects would be self eliminating but exciting while they lasted

[diesel pig]

Ha! That was the set up I was going to use for the one I was garnering parts for, good to know it works! Good on you!

[Flettner]

Ha! That was the set up I was going to use for the one I was garnering parts for, good to know it works! Good on you!

Would work better as a twin cylinder, pistons rising and falling together, even inlet draw. ( tandem )
Singles need a plenium ( ? ) and with a draw through carb you get throttle lag ( slight but never the less there ). Single cylinder with no volume / plenium is hard on the supercharger drive and can set up airflow resinance that will cause flat spots in the torque curve.
With valve port throttle / injection you will need a blow off valve as the pump is pumping all the time.
A twin cylinder neatly fixes all these issues.
Just had to add my bit.

[Sketchy_Racer]

Ha! That was the set up I was going to use for the one I was garnering parts for, good to know it works! Good on you!

Well now you know it works, you should chuck it all together and there'll be two supercharged buckets on the go!

Would work better as a twin cylinder, pistons rising and falling together, even inlet draw. ( tandem )
Singles need a plenium ( ? ) and with a draw through carb you get throttle lag ( slight but never the less there ). Single cylinder with no volume / plenium is hard on the supercharger drive and can set up airflow resinance that will cause flat spots in the torque curve.
With valve port throttle / injection you will need a blow off valve as the pump is pumping all the time.
A twin cylinder neatly fixes all these issues.
Just had to add my bit.

Need to find a CB125T and sleeve it down. Only problem is that the weight starts going through the roof!!! The only positive of the little chinese engine is that it is light. Although that may become a bad thing soon!!

[TZ350]

Need to find a CB125T and sleeve it down.

Funny you should mention that, Team ESE has an old CB125T Bucket out in the shed and a FZR Bucket chassis to put it in ..... hmmmmm supercharged 2T would be better but....

[Flettner]

may I ask, where did you get the little supercharger from?

[husaberg]

Would work better as a twin cylinder, pistons rising and falling together, even inlet draw. ( tandem )
Singles need a plenium ( ? ) and with a draw through carb you get throttle lag ( slight but never the less there ). Single cylinder with no volume / plenium is hard on the supercharger drive and can set up airflow resinance that will cause flat spots in the torque curve.
With valve port throttle / injection you will need a blow off valve as the pump is pumping all the time.
A twin cylinder neatly fixes all these issues.
Just had to add my bit.

It doesn't have to be a tandem, a 360 twin?
I seen a pic the other day of the supercharged 1939 250 single Motoguzzi gp bike it had a Plenium that looked the size of 10 litre bucket.

Glenn if you do want to do a twin I have about 2 fzr250 engines here in bits if you can get them up to you can have them.

(can't find a decent pic but have a look at the blurry 1939 one)

(later he scans a pic)

[speedpro]

Need to find a CB125T and sleeve it down. Only problem is that the weight starts going through the roof!!! The only positive of the little chinese engine is that it is light. Although that may become a bad thing soon!!

Pretty sure the 125T is a 180deg twin so it has odd firing intervals, same as my FZR. Funnily enough the FZR isn't that heavy despite starting as a 250. It isn't close to a MB100 though.

The Chinese motor being light is a good thing. Your rubbish bin won't be too heavy to move when you sweep the bits up, boost and revs and all that.

[speedpro]

Maybe I should send my FZR to you and you could fit the AMR300. The turbo is not going t be as good, certainly on a kart track