ESE's works engine tuner

[richban]

Rich what class will you be racing in?

F3 maybe. Not really going crazy on the racing just fun stuff at this stage. To go anywhere near fast the handling needs sorting. Never driven a bus but might be similar to an RGV. So slow to steer and midd corner is poo no feel. I have a plan to get it close to my NSR. We will see how that works out.

[richban]

I was going to say centre plugs and shorts.

....Done....

[husaberg]

F3 maybe. Not really going crazy on the racing just fun stuff at this stage. To go anywhere near fast the handling needs sorting. Never driven a bus but might be similar to an RGV. So slow to steer and midd corner is poo no feel. I have a plan to get it close to my NSR. We will see how that works out.

ok F3 ya giving away a fair few cc's... Whats wrong with a RG150 top end or 2, then tuning it up, throw in a 54mm crank etc.
I seem to remember the RG250 crank is fairly close to fitting according to the webby thing.(Vincent Crabtree/VinCBR900) There is a proper full monty 54mm crank for one on TM at the moment. but you might need longer laces for that.

[Drew]

ok F3 ya giving away a fair few cc's... Whats wrong with a RG150 top end or 2, then tuning it up, throw in a 54mm crank etc.
I seem to remember the RG250 crank is fairly close to fitting according to the webby thing. There is a proper full monty 54mm crank for one on TM at the moment. but you might need longer laces for that.

200 Wolf slugs @ 66mm, and a 57mm stroke ends up around 194cc per. It's legal to go out to 400cc two stroke in F3, might as well do it proper.

Do two strokes like to be that over square?

[richban]

200 Wolf slugs @ 66mm, and a 57mm stroke ends up around 194cc per. It's legal to go out to 400cc two stroke in F3, might as well do it proper.

Do two strokes like to be that over square?

Did i not mention shoe string. If I got 65hp and it handled like my NSR it would be fast and fun. I am happy to make up the numbers. It will look great and smell nice and do the odd wheelie. What more could you want. Oh and sound good.

[Drew]

Did i not mention shoe string. If I got 65hp and it handled like my NSR it would be fast and fun. I am happy to make up the numbers. It will look great and smell nice and do the odd wheelie. What more could you want. Oh and sound good.

I don't recall anyone winning a proddy title, on an NSR once the VJ22 came out. Prolly needs a suspension rebuild.

Start a thread to discuss it I think. This one is getting kinda dragged off track.

[richban]

I don't recall anyone winning a proddy title, on an NSR once the VJ22 came out. Prolly needs a suspension rebuild.

Start a thread to discuss it I think. This one is getting kinda dragged off track.

Yes true. Might take this over to the racing section. Sorry 2 stroke tuners. As you were.

[TZ350]

Page 810...

Bucket Racing Video from Chrisc's thread

and Pictures of the bikes http://www.kiwibiker.co.nz/forums/sh...-warning/page7

Exhaust port dam.

The stuffer plate for the exhaust port dam is held down by screws through the exhaust port floor, the glue is only there to seal it.

something on raised exhaust port floors from Jan Thiel

Originally Posted by Jan Thiel

So that you might be able to raise the exhaust's 'floor'.This helps improve blowdown flow, as seen on a flowbench.In 2007 we started to raise the underside of the exhaust port.

The first results were very promising!But at the end of 2007 I retired, so I could not finish what I started.The idea was to raise the exhaust underside as much as possible until power dropped.

And then, with a smaller exhaust port underside it might have been possible to widen the A-ports more
without losing the fresh charge into the exhaust.

To make the raised floor work as part of an overall plan that was seen all the way thru by Jan at Aprilia, the area reduction at the port should be extended all the way to the flange.

Making this oval, and reducing the duct volume all the way to the exit then works with the 75% area guideline for T or tripple port duct exit geometry.

Attachment 285398

Well at least its good to know I am on the right track but I sure would like to know if this is the limit or if I can take it closer to the top of the transfers.

Attachment 285187

On the TS make the rear transfer ports as wide as possible and shape them like the ones in the picture.

Attachment 285210

24mm Tillotson HL360A Pumper Carb

The original post has more info on tuning ideas for the port/reed Suzuki engines.

[TZ350]

Yes true. Might take this over to the racing section. Sorry 2 stroke tuners. As you were.

All 2T tuning and racing adventure is interesting, Team ESE has not got to serious suspension and chassis tuning yet, as we are still struggling to get the engine and chassis we want together first, but I am sure chassis tuning will become part of the story too.

[richban]

All 2T tuning and racing adventure is interesting, Team ESE has not got to serious suspension and chassis tuning yet, as we are still struggling to get the engine and chassis we want together first, but I am sure chassis tuning will become part of the story too.

Well the bike is almost together so I might just finish it and do a base dyno run. Then pull it down for the rebuild and keep you posted here on how things are going. The cool thing is that in about a month there will be 4 more 250 2 strokes singing around the track. 3 x RGVs and one Aprilia RS.

[Drew]

Well the bike is almost together so I might just finish it and do a base dyno run. Then pull it down for the rebuild and keep you posted here on how things are going. The cool thing is that in about a month there will be 4 more 250 2 strokes singing around the track. 3 x RGVs and one Aprilia RS.

Your mate that brings in the Tyga fairings, is he included in the "singing around the track"?

[richban]

Your mate that brings in the Tyga fairings, is he included in the "singing around the track"?

Yep he is. His bike is going rather well now.

[G Jones]

At 01.30 AM it took me some thinking to kick out the inches and the thou's. But I finally worked it out.
That rule of thumb says: ring gap = 0,4% of bore. Jan Thiel found this to be critical; we use 0,5% of bore as a minimum.
Using too wide a gap may loose you some power. Using too tight a gap may turn the ring into a very effective oil scraper which can lead to a giant seizure.

Sorry to drag up an older post - but I would like to confirm some thoughts on ring gap when running chrome rings.
With our 64mm bore (TZ350) - we've recently been using Wiseco rings - which when new tend to gap at about 0.5mm (0.65mm on a worn set) - and wondering if we are giving away any appreciable power - I do have some Goehtze 64mm rings which I can gap a lot tighter - but last time I tried that - I did have a "giant siezure" - so have been setting the gaps a lot wider - so could we gain a bit - or leave it wide...?
Thanks.

[Gigglebutton]

All 2T tuning and racing adventure is interesting, Team ESE has not got to serious suspension and chassis tuning yet, as we are still struggling to get the engine and chassis we want together first, but I am sure chassis tuning will become part of the story too.

If I get my shit sorted and alter your frame.

[bucketracer]

I think TeeZee, is finding it hard work to develop the engine he can see in his minds eye, still full marks for perseverance.