ESE's works engine tuner

[richban]

Not so much light motors though I reckon you could ditch about 10kg if you got rid of all the extra stuff on the top end Rich

Yes well ......

[husaberg]

Yes well ......

You may need to take some more out of the sleeve ya think

[TZ350]

Page 510 .....

On page 500 Bucket posted links to the basic info needed for building high 20's GP125 Bucket Engine and also this handy list.

Page 500 .....

No need to have a peaky engine. Here are Two Very useful Tools. EngMod2T a 2-Stroke simulation package and a handy (and cheep) Porting Calculator from:- http://www.porting-programs.com/ which is based on Blairs work.

Attachment 263589Rich's 4-Stroke





There are over 3,500 images on this thread. To find the interesting ones use Thread Tools near the top of this page and View Images, then sort them from the Beginning and 70 to a page. Click on the Image to view it and the little N/A sign to go to the Post about it.

On each decade page, 490, 480, 470, 460 etc there is a collection of links or a collection of the more interesting technical posts from the last ten pages.

A bit of an index .....

Page 490 The Trombone, Ex port resonance and Transfer port stagger.
Page 480 A vid of the Trombone, transfer timing and hot gases entering the transfers because of insufficient blow-down for the rpm.
Page 470 Blow-down STA ... Specific Time Area.
Page 460 No list but the page talks about Boost Bottles.
Page 450 Links to the basic info for building a 30+ hp Bucket.
Page 440 No list, page talks about power and air correction jets.
Page 430 Carb inlet lengths and crankcase volumes.
Page 420 Transfer ports and the importance of the up swept angles, the Leaning Tower of Pisa principle explained.
Page 410 Rolling road dynos, main and power jet ratio.
Page 400 Links to the basic info for building a 30hp Suzuki GP125 Bucket engine.
Page 390 Links to Frits collection of Aprilia stuff.
Page 380 Transfer duct shape and STA's.
Page 370 No list but the page talks about Jan Thiel and racing 50's.
Page 360 Frits chamber calculations formula.
Page 350 PJ switching, Wob and crank shaft balance.
Page 340 Muriatic Acid, main brg float, Husburgs con rod dimensions.
Page 330 No list, page talks about expansion chambers, race gas.
Page 320 High temp silicon, Yama Bond, crankcase sealing, air solenoids Vid clips of Mamola.
Page 310 Copper for cooling, sprockets for cooling, steering head brgs.
Page 300 How to determine STA numbers.
Page 290 B/E dimensions, delivery ratio, Honda Ex Step, stinger nozzel
Page 280 Aprilia RSA port layout explained, pumper carb, links to gluing up the GP cases.
Page 270 Link list on how to make a decent high 20's hp Suzuki GP125 Bucket engine.
Page 260 Over rev cough and what it means, Mallory metal for crank balancing.
Page 250 27hp from a 1978 Suzuki GP125
Page 240 Aprilia RSA cylinder stuff.
Page 230 Porting Calculator and a lot of other useful tech links.
Page 220 RG50 part numbers, 2-stroke carb atomisers explained
Page 210 Page is mostly about the results from the TRRS
Page 200 Simple 18 hp Suzuki GP Bucket engine using a RG250 pipe.

Etc ...

[TZ350]

How much total weight difference are the wheels on chambers bike. I think you said 10kg but was that the bike surely not the wheels?

From memory it was 10-12kg difference between the complete wheel assemblys disks, cush drive, sprockets etc, true apples with apples comparison.

When I check Chambers FZR for its weight distribution I will also try to find the spare wheels and check them too.

[jasonu]

From memory it was 10-12kg difference between the complete wheel assemblys disks, cush drive, sprockets etc, true apples with apples comparison.

When I check Chambers FZR for its weight distribution I will also try to find the spare wheels and check them too.

Plus getting rid of unsprung weight vs sprung weight has a much greater benefit.

[wobbly]

Aw cimon youse guys ,do the Britten thing and spin up some carbon string wheels - easy.

[Yow Ling]

A different thing Ive been thinking of is det counter. I bought one of the knockmeter that Wob put us onto and its pretty cool. I got it with the switching to ground output so I can retard the Ignitech automatically, but I thought it would be good if it could also count the number of times it retards the ignition, I had a OmronH7EC counter in the drawer, if i connect its input on the retard signal it can count the dets just like a $1500 det counter, total investment for knockmeter counter and new knock sensor about $200

Attachment 263487 Attachment 263488

Tested this goes great !

[bucketracer]

Just watched MotoGP and Stoners win, He was having front wheel chatter problems, so even the big boys struggle with it some times.

[jasonu]

Just watched MotoGP and Stoners win, He was having front wheel chatter problems, so even the big boys struggle with it some times.

Thanks for the spoiler...
On race weekends I keep away from the 2012 Moto GP thread for this very reason.

[bucketracer]

I also wonder if the Suzuki GP100 has a lower primary drive ratio that the GP125? And, if so, are they interchangeable? This could sort out some of those big gaps between upchanges (Oh and alter your power output on the dyno too)

I would be interested in seeing the maths that support your assertion that a change in the primary drive ratio alters the power output on the dyno.



A graph you posted of a multi gear run.

Three different overall gear ratios and pretty much the same power output from each.

Changing the primary gear ratio affects the overall gear ratio just like changing gears does. But as we can see from the graph there is no real change in rear wheel hp.

Maybe you missed it when I first asked you, but I was hoping someone who knows so much could explain their claim in terms that make sense.

"(Oh and alter your power output on the dyno too)" I don't see that it in your multi gear graph or on the dyno at work.

When I asked before, I saw some whiffle from you but not a real answer.

I am very interested in how an experienced engine tuner and dyno man gets different gear ratios to show up as power increases, maybe its an industry secret.

Or just something you said to impress.

[Yow Ling]

Thanks for the spoiler...
On race weekends I keep away from the 2012 Moto GP thread for this very reason.

How many weeks do you think we should wait before talking about it?

[jasonu]

How many weeks do you think we should wait before talking about it?

Yeah fair cop. I thought he was talking about a more recient race. (that is happening next weekend...)
Apologies to all concerned.

[husaberg]

Aw cimon youse guys ,do the Britten thing and spin up some carbon string wheels - easy.

Cats cradle? I think they should do some solid wheels from billet.
Do some of the cars have 17's?

[Frits Overmars]

...I think they should do some solid wheels from billet.

Should that be depleted uranium or will you settle for tungsten, Husa?
Wob is right: carbon wheels are the way to go. But as John Britten found out while handling the stuff, there is not all that much difference between carbon fibre and asbestos....

[Moooools]

Should that be depleted uranium or will you settle for tungsten, Husa?
Wob is right: carbon wheels are the way to go. But as John Britten found out while handling the stuff, there is not all that much difference between carbon fibre and asbestos....

Yes they don't call it the black death for nothing.
The UoA Formula SAE team I am part of had a crack at carbon wheels (for a car). They found it very difficult to get a good shape for beading the tires. They looked cool though and were nice and light. A bit of Al honeycomb would probably be required and a 4 part mold too. Hard to get right.