ESE's works engine tuner

[TZ350]

Hi TZ
i would say that is the water pump.

Of course..........

Check out Team ESE's NedKelly going around Dave D at Taupo.........

[Buckets4Me]

I have never wanted a 2 stoke more after watching Andrew on his RS. I wish I could fit on one of them. Maybe an RS250 would be the go. Man them things are fast and cool. Lotto here I come.

try an fzr250 frame 1989+ delta frame ? I want to win lotto so if I fall off AGAIN I dont have to go back to work and explain to the boss whats happened and why I'm not coming back for 3 months AGAIN!(would be the 4th time) also an rs250 frame would be cool but early 1990 250's seem like the next best thing tzr250?fzr250 Attachment 228304

[ac3_snow]

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Attachment 228091Attachment 228092

These side exhaust ports are hard work, now if there was a way to bring them straight out the side between the fins then I could put more of them in for even more blowdown time area..............

Hi TZ, Im guessing thats your auxiliary exhaust port, the small one off to the side and above the transfer port, seems to be a rather large bridge between that and the main exhaust port, I'm surprised that theres enough meat in the cylinder?
Is this something new you have come up with post Taupo? Also I'm assuming that because of the limited access between the fins you weren't able to weld in extra material and just worked with what the room available from factory?
And what would stop your from simply having auxiliary exhaust ports that just exited immediatly out the side of the cylinder?

[TZ350]

Yes your right about the auxiliary exhaust ports, and the studs make it hard too. I have been tempted to wack some holes through the side of the cylinder to see what happens.

I remember some go kart guy talking about it, the rules for his McCulloch class was "no modification of the exhaust port" well he didn't modify it, he just added a whole bunch more with a big hand drill.



I vaguly remember he claimed it worked when it was up on the pipe. Sounds to easy to be true, good rule bending idea though.

And apon mature reflection and good advice I won't be doing it...........



They sure take porting seriously...........



And look at that, big head, twin carbs and a rotary valve conversion...........



And WTF a 4 valve twin cam head conversion...........

[TZ350]

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Interesting read about the future of 2-strokes and direct fuel injection ........

http://www.dirt-bike-tips-and-pics.c...o-strokes.html

The Ski Doo 600 E-tec



http://www.google.co.nz/images?clien...w=1024&bih=574

[TZ350]

Hmmm it is one mans opinion but I am starting to see why F5Dave has a negative thing about Honda.........

"It was about that time, it seems, when one of the four-stroke monks had an epiphany: "Instead of spending more money on exotic engines," he might have said, "which hasn't been getting us anywhere, why don't we just buy the AMA and FIM and make our own rules? For instance, we could require that all two-stroke riders wear their helmets backward - if they can't find the first turn, we have to win!" And that is - sort of - what happened.
Honda also likes to be seen as an 'engineering company'. I must point out that trying to force a particular technology (that is not working!) on a naive public by denying options, rewriting race rules, etc. is not any sort of 'engineering'. "

And it goes on............

"For the manufacturers, the 'best bike' is the one that gets you to part with the most money. As E.F. Schumacher told us, "...in economics, the only measure of 'good' is profit. I tell people that in engineering, goodness is efficiency. The two are opposites: profit leads to more and more; efficiency to less and less."For you and me, 'best bike' must mean something else."

http://www.dirt-bike-tips-and-pics.c...o-strokes.html ........... 27th Jan

Now this warms my heart........

"This little 105-cc wonder rips 30.5 hp @ 12,000 rpm. The 105 is more of an enduro motor. The JMC pulled the MotoVerde dyno from 3000 rpm to 13,500 rpm. I cannot point to another engine that makes almost 300 hp/liter and has such a wide powerband."

http://www.dirt-bike-tips-and-pics.c...o-strokes.html ........... 23rd Feb

A 100cc water cooled Bucket with 30+hp and a wide power spread .... its got to be possible and Speedpro is nearly there..

Even more interesting............

"The huge improvement from stock might suggest radical changes. In fact, he made only minor alterations - but the right ones! After testing several vendor pipes, he went with one made by DEP. He replaced the standard 28-mm carb (same as the 85 SX) with a 30-mm Mikuni. He cleaned up the ports and set the squish clearance. But 'the secret' was adopting a CRD programmable ignition module; then spending hours finding the right curve. Ignition timing has been largely ignored by tuners. These programmable units are a rather new option and the dyno time required is expensive because any curve only fits a specific engine configuration. Change the pipe (to one with a longer convergent-cone, for example) and the ignition curve has to be gone over. But what Balaguer's results show is that two-stroke engines are much more sensitive to ignition timing than we ever guessed in the old days -"

http://www.dirt-bike-tips-and-pics.c...o-strokes.html ........... 10th March

Speedpro get yourself an Ignitech ..... Wobbly sells them .........

[jasonu]

http://www.dirt-bike-tips-and-pics.c...o-strokes.html
Took an hour to get through but a really good read. Thanks

[Bert]

......
And what would stop your from simply having auxiliary exhaust ports that just exited immediatly out the side of the cylinder?

looks ugly.... but there is some interesting engineering:
http://picasaweb.google.com/xyger.co...ygerRennsport#

I like the reed block modification

[TZ350]

looks ugly.... but there is some interesting engineering:
http://picasaweb.google.com/xyger.co...ygerRennsport#

I like the reed block modification

Hi Bert thanks for the link, interesting pictures.........

[bucketracer]

.

Face it, the 2 strokes got smashed.

Team ESE the Myth Busters ...........



Through their own efforts they have pretty much Busted the Myth that a rider can win races with just Raw 2-Stoke HP

........... still a bit of its nice to have though.

[TZ350]

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One of the smartest Port Mapping ideas I have seen in a very long time.

Chambers pushed a length of PVC pipe into a cylinder then poured some PVC primer in through the ports.



And the primer neatly marked out the port windows and the lines were etched so deeply that they couldn't be wiped off.

Chambers was easily able to measure them and recons that when he cuts the new port window shapes he will transfer them to the new liner by gently sandblasting them.

Now thats dam smart thinking, I am very impressed by Chambers idea. ..............

[ajturbo]

One excuses after another. Face it, the 2 strokes got smashed. .

Your ALL lucky i wasn't there this year.... the might GT lives... but for lack of time and money, it didn't happen......

but now like Dave last... i have ALL YEAR to get it ready...so watch out.. i "may" even sport a new frame..!!!!!!

so stop patting yourself on the back..... be very worried about my come-back... be VERY WORRIED i say

[ajturbo]

.

One of the smartest Port Mapping ideas I have seen in a very long time.

Chambers pushed a length of PVC pipe into a cylinder then poured some PVC primer in through the ports.



And the primer neatly marked out the port windows and the lines were etched so deeply that they couldn't be wiped off.

Chambers was easily able to measure them and recons that when he cuts the new port window shapes he will transfer them to the new liner by gently sandblasting them.

Now thats dam smart thinking ..............

Do you guys work????

[F5 Dave]

Or just use a spray can & let it dry a bit.

Obviously with the making the sleeve thing (assuming you're taking the RGV125 barrel down to 100) the transfers move backward in the barrel which can dick you around a bit.

[TZ350]

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Chambers had a lets just try and see moment..... clever though.



I think his plan is to re-sleeve an air cooled GP125 cylinder with a alloy sleeve and then plate it.