ESE's works engine tuner

[kel]

I would have to write a book with 30 chapters - its this, that my customers are paying for.

Bleeding your customers to write a book Write faster, I'll take a copy.

[dinamik2t]

as far as correct assembly is concerned its this, that my customers are paying for.

Har har . Ok, Wob, thanks!
Perhaps I should seek such directions in race engine manuals.

[TZ350]

OK ... going to have a go on the dyno with the 30mm (the middle) carb tonight. The objective is to see if the 24 is choking the engine yet.



The 24 and smaller 72% and radiused main exhaust port with side windows is making just about the same power as the single 75% wide one did.



But we still have a way to go to get back to the extra wide exhaust ports glory days of 31hp.

Anyway tonight it will be interesting to see what we can get out of a 30mm carb.

[crazy man]

l was thinking about putting a 24mm carb on my brothers rs125 just to see what it ould put out

[speedpro]

Don't tell him though, eh.

[Buckets4Me]

l was thinking about putting a 24mm carb on my brothers rs125 just to see what it ould put out

now thats backwards but would give us an idear

[TZ350]

Not the result I was expecting.



Kel gave me a hand with the dyno tonight and here are the carb comparison results .... 30mm carb Blue line vis 24mm Red line and I expect that with a bit of a play the 24 would pickup that bit of over rev too.

Funny thing, after radiusing the top of the exhaust port I had to increase the 24mm carbs main jet from 135 to 145 and the 30 ran best at 125 ...... bigger carb smaller main jet, I don't get that.

At near 30rwhp it looks like the 24mm carb is not strangling the intake yet, so something else is holding it back. And the good old plenum is not needed for now and can go back in the cupboard.

[dinamik2t]

I like this test TeeZee; trying to find out what's missing in a back to back test.
I wish I could answer you carburation question.. I recently found this Dellorto 'read-me' pdf: http://www.thisoldtractor.com/gtbend...rto_manual.pdf. I haven't read it yet, but perhaps there are some interesting info inside -looks so at least.

[TZ350]

Just had a look at it, very interesting read. Thanks.

[dinamik2t]

There were also these two ignition tester made-in-china gadgets, which seemed rather interesting:

http://www.rccdi.com/news/Accessories/8.html
http://www.rccdi.com/news/Accessories/7.html

Forgot to mention them the other day..
The instructions doesn't help much. The first is a spark tester / RPM, the second one a static/base advance finder.
They're sold on ebay too.

[ief]

Would you mind sending me the recent engmod files Rob? Didn't get much feedback on the ones I send you and perhaps of no use at all but still curious. I'm now at 42 hp, detuned exhaust to 22 mm stinger and 24mm carb. Only thing perhaps to high is compression of 7.1? (not to sure about ignition figures as well in the light of realism)

But still, if I hear dinamik simming 47 and making 34 then what's the use ai?

Nevertheless would be nice to be able to compare yours and mine for educational purpose and all

[dinamik2t]

Oh, Rob's simulation consistensy is far better than mine. From 39 to his max 31, is only factor .8 .
And Wob has already proven it even better. Myself, I am just missing the experience to supervise the sims predicting capabilities, unlike a 30year-experienced tuner. If it wasn't like that, I guess they would like to pull all their (remaining?) hair out!

I can upload that 47dk pack, if you like to play though.


(dk=the donkey unit)

[ief]

Don't mind if you do Din, the more the merrier

[dinamik2t]

Here you go:
http://users.uoa.gr/~sph0800108/mode...2T/2stroke.rar
( http://users.uoa.gr/~sph0800108/mode...4.OneHalf.pack , http://users.uoa.gr/~sph0800108/mode...pr_RSA125.pack , http://users.uoa.gr/~sph0800108/mode...1-Georgio.pack )
Mind yourself though, there may be inaccuracies esp. on carb & exp/trp files. Anything with a greek question mark ';' is definitely one of them.

[ief]

Cheers! Will take a look at it later on