ESE's works engine tuner

[F5 Dave]

. . .(R/H Pic) you will see you have to turn your stator slightly clockwise but otherwise your pretty much on the money.

. .
arrrrghhh matey correct but not in this scenario I believe... these are what you're referring to? correct me if I'm wrong.

Correction forthcoming;

no, . Graphically demonstrated in above sentence. Once correctly used, once incorrectly.

[ac3_snow]

right you are. I'l go back and learn how to read I think.

[Henk]

Bloody grandma nazis

[F5 Dave]

I googled Grandma nazi & sadly didn't come up with the picture I had in my head.

bit odd though.

[F5 Dave]

ok late enough for a musical interlude (it's been about 100 pages since the last)

(don't worry I considered Dead Kennedys Nazi Punks, but decided against it 'cause its a shit song).

http://www.youtube.com/watch?v=xwhBRJStz7w


and for something completely different; one of the strongest female vocalists performances this side of Wendy o Williams

http://www.youtube.com/watch?v=BXk5w91chgI

Just don't make the mistake of buying a Sevendust CD.

[cotswold]

http://www.youtube.com/watch?v=IAetOJvdOzs

Try this and it's fairly topical

[cotswold]

[QUOTE=TZ350;1130018790]On page 200 there is a simpler 23 rwhp setup using a RG250 chamber modified to RM125 specs.

And on this page, the basic details for 27rwhp from a 1978 Suzuki GP125 Engine and RS125 Expansion Chamber.

Attachment 235170

Not at all peaky, 3.500 rpm power spread.

Cylinder Deck Height (Squish) 0.8mm.
Exhaust 25.8mm from top of cylinder, and opens 80deg ATDC for 200deg Duration.
Transfers 40.8mm from top of cylinder, and open 116deg ATDC for 128deg Duration.
Inlet port opens 145 BTDC closes 80 ATDC and is 45deg wide and inlet port opened to 30mm equivelent dia with 24mm carb.
Std 1990 Honda RS125 Pipe. The pipe is 40mm and the exhaust port is 36mm, we leave it as is and don't match the Ex port to the pipe.

Attachment 235176

Opening the rear transfers and flatening the port roof to 5 deg. Main std at 12 deg. Boost std at 55 deg, but all opening together.

Attachment 235175

Primary transfer pretty much std., secondrys and boost as wide as possible, Exhaust 72% of bore diameter.

Attachment 235172

A view of the transfers, the copper is to take heat from the exhaust port area and distribute it to the extra copper under cylinder finning we use.

Attachment 235174

Dimensions of a Honda RS125 Pipe.

Attachment 235171

Suzuki GP125 engine and RS pipe in a Yamaha FZR 3LN 250 rolling chassis.

Hi Guys, would you be willing and able to give me a port map for this configuration.
Thanks

[F5 Dave]

That's topical in a 2 stroke tuning thread?


(Not that I'm saying Skunk Anaisie is).

[kel]

Hi Guys, would you be willing and able to give me a port map for this configuration. Thanks

Are you serious?
Buy portcalc and map analyser then you can quickly draw it yourself then compare any changes you may have in mind. Otherwise you could sketch it or draw in AutoCAD as all the measurements are there.
Monday morning

[ac3_snow]

Page 240

Links and Interesting Quotes from the last 10 pages, other link lists can found on the decade pages starting with Page 80.

A handy (and cheap $16 USD) Porting Calculator from:- http://www.porting-programs.com/ is based on Blairs and Jennings work.

Money well spent

port map for this configuration.

The pics are pretty good, however would be interesting to see, in the name of science and all...

[TZ350]

Cylinder Deck Height (Squish) 0.8mm.
Exhaust 25.8mm from top of cylinder, and opens 80deg ATDC for 200deg Duration.
Transfers 40.8mm from top of cylinder, and open 116deg ATDC for 128deg Duration.
Inlet port opens 145 BTDC closes 80 ATDC and is 45deg wide and inlet port opened to 30mm equivelent dia with 24mm carb.
Std 1990 Honda RS125 Pipe. The pipe is 40mm and the exhaust port is 36mm, we leave it as is and don't match the Ex port to the pipe.
Opening the rear transfers and flatening the port roof to 5 deg. Main std at 12 deg. Boost std at 55 deg, but all opening together.
Primary transfer pretty much std., secondrys and boost as wide as possible, Exhaust 72% of bore diameter.

Hi Guys, would you be willing and able to give me a port map for this configuration.
Thanks

The cylinder is on my bike now.



The essential details are in the text and these are the axial angles as best as I remember them.

The main transfers are left pretty much as they were, its only the secondry transfers, boost port and exhaust that have been radicaly changed.

[TZ350]

Gluing the 27hp Engine Cases.



These are the places that need gluing before porting the inlet and transfers.

[cotswold]

Are you serious?
Buy portcalc and map analyser then you can quickly draw it yourself then compare any changes you may have in mind. Otherwise you could sketch it or draw in AutoCAD as all the measurements are there.
Monday morning

Mmm yes pretty serious, I am the first to put my hand up to admit that my mechanical ability is, on a sliding scale, near the bottom, but I am able to trace around something. If I bought the portcalc I would not have a clue how to use it.
My Rotax race bike was tuned by Queens university and Mike Hatherall tuned my Honda, why because they were very good at it, this is why I am asking ESE for their help, they are very good at it. Thanks for the idea though

[cotswold]

These are the places that need glueing before porting the inlet and transfers.[/QUOTE]

Thanks for that, I am sure I will be able to muddle through as I have a friend who loves the tuning side of things. I sent him your thread and he got quite excited, he was the one who asked if a port map was available, I will have to get him a degree wheel, I spotted a template on line.

[TZ350]

Not all new pistons are good pistons. This die cast Prox piston lasted less than a 1/2 hour on the dyno before it started cracking up.

I think we will stick with forged pistons from Wiseco, the last one was in for more than three seasons.