ESE's works engine tuner

[Gigglebutton]

Attachment 246711

Tonight Speedpro won the race to be the first documented usefull Bucket engine at 30rwhp

Great job Wobs. The art and science of 2 stroke tuning on a dyno graph.

[F5 Dave]

. . .
And how did you slip in the post about mine when I posted after yours.did you change your whole post Dave?is that cheating?

Well now we know your secret. Slow typer. Must have taken you 10min to post that, or at least to read other posts & post it.

Bit spooky we both came up with the same example, kinda thought, erm didn't you read my post?

[wobbly]

With todays technology the bar can now be raised to around 40 crank Hp without too much drama involved, and thus achieving around 35 RWHp.
Its just a matter of careful parts selection and very careful assembly.

The alloy inserts for the TZ350 was the customers choice - once its all proven, and we get a handle on what the engine likes, then I will do some bronze ones.

AvGas in NZ is all LL100, this is low lead 100 octain.But the rating is defined differently in avaition.Its approx equiv to 100 "pump" gas, but has a lean rating of 100 and a rich rating of 130.
MNZ Appendix E defines avgas as max 112 MON amd max 108 RON.

Avgas, or any leaded "race" fuel reacts completely differently to unleaded pump gas.
In general terms the unleaded hates compression, but loves timing.Avgas is the opposite in that it makes more power up to the knock limit with more com.
Unleaded makes better power when run rich,avgas makes more the leaner you go.
Tuning in the old days with RS and TZ engines meant using lean mains and small powerjets ( 35 ) as turning off a big jet over the top would mean being too lean in the overev.
Nowdays the unleaded fuel runs rich at peak power, then uses a big powerjet ( 55) to create some heat in the pipe over the top.

[quallman1234]

With todays technology the bar can now be raised to around 40 crank Hp without too much drama involved, and thus achieving around 35 RWHp.
Its just a matter of careful parts selection and very careful assembly.

The alloy inserts for the TZ350 was the customers choice - once its all proven, and we get a handle on what the engine likes, then I will do some bronze ones.

AvGas in NZ is all LL100, this is low lead 100 octain.But the rating is defined differently in avaition.Its approx equiv to 100 "pump" gas, but has a lean rating of 100 and a rich rating of 130.
MNZ Appendix E defines avgas as max 112 MON amd max 108 RON.

Avgas, or any leaded "race" fuel reacts completely differently to unleaded pump gas.
In general terms the unleaded hates compression, but loves timing.Avgas is the opposite in that it makes more power up to the knock limit with more com.
Unleaded makes better power when run rich,avgas makes more the leaner you go.
Tuning in the old days with RS and TZ engines meant using lean mains and small powerjets ( 35 ) as turning off a big jet over the top would mean being too lean in the overev.
Nowdays the unleaded fuel runs rich at peak power, then uses a big powerjet ( 55) to create some heat in the pipe over the top.

Have you had any experience with the mobil leaded race gas? Sold at mobil manfield etc is there much difference between this and av gas. I ask because I usually run it in my rs125 however am not sure of the avability of it down south and am a little concerned of any effects with switching fuels

[husaberg]

Well now we know your secret. Slow typer. Must have taken you 10min to post that, or at least to read other posts & post it.

Bit spooky we both came up with the same example, kinda thought, erm didn't you read my post?

Kind of spooky all right. I do Type Slow as I was hired for my looks. I am guessing I never refreshed the page. I was only reading something on the other Ducati BMS 851/9? cc85? or whatever it was the other day with the Steve Roberts twin spar frame and Hilbourne injection Blah blah.I have read a few threads with Robert Taylor and it seems he is mmm..Tightly wound.(get it tightly wound) I do think he did have one of the first Dynojet Dynos I can remember.

Its kind of spooky we both have Stinger/Wolfs as well as MB50/100 motors when you think about it.Throw in the Euro dirt bike as well. Not to mention the dark sense of sarcastic humor no one but the very good looking intelligent types seems to appreciate and understand.

For Wob thanks for filling in the gaps re the fuel I guess I was the only one who missed the avgas is ok bit.
I was talking to Kickaha the other day and we were both muttering about the sidecars and how well one would go with something like this in it.what would be the usable power output for a chair with a CVT trans?
I was channeling the Monotrack thing in the 70s with the Mag Monocoque and snowmobile engine.none of them would be legal for bike classes but I guess a Rotax/seadoo would be legal for Bears. would be fun at least on the straights and piss of a few Ducks and Hogs. Good for a giggle and a great way to meet nurses.
or snowmobile engine check out the HP claims
http://www.aaenperformance.com/V4_racing_engine.asp
http://www.psipowerinc.com/34695.htm
While looking I came across the V4 apologies if it has already been posted but I am in love with it now
I note this engine woul seem to be running peak HP at a mean piston speed of 5000ft/minute I wonder how long the crank lasts.

For snow what was the outcome from the blow up diagnosis comp/timing/fuel

[richban]

Have you had any experience with the mobil leaded race gas? Sold at mobil manfield etc is there much difference between this and av gas. I ask because I usually run it in my rs125 however am not sure of the avability of it down south and am a little concerned of any effects with switching fuels

My understanding is its old Av gas sent to them in a big drum at manfield mobil. Wellington aero club have the fresh stuff straight from the pump. I can notice the difference when using fresh AV gas on my bike. I would imagine the same would be true on your 125.

[wobbly]

Race gas bought in drums really is" low lead race gas", nothing wrong with it - but hard to get the same stuff in many places.
The stuff in tanks at stations/tracks is "old" avgas.The best, and only way to be sure of what you are getting is to go to any local airport and buy Avgas - it is tested regularly and is guaranteed to be fresh and to spec - has to be, or the Lycomings would all fall out of the air - bad.

[gamma500]

Hi wobbly,

are pipes with 3 stage diffusers a lot better than pipes with 1 stage diffusers?

What about 5 stage diffusers?

[F5 Dave]

You might want to define 'better'. Along with intended application & transfer curve into barrel. Incidentally one of my bikes has a 0 stage diffuser & parallel tube header. It is 'better' than my older Trials bike that had a quasi expansion chamber.

[wobbly]

Having multi cone sections gives the designer the ability to shape the power curve to the desired application.
Add to this 2 stage headers and you can achieve any wave amplitude correction needed with a 3 stage diffuser.
Here is a design I did for a Euro champ winning 50cc Malossi,it has a nozzle in the exhaust duct with an oval to round transition in the flange.
A two stage header, 3 stage diffuser with the steepest angle in the middle.
A killer pipe for the cylinder porting as it was used for long track racing only.
Graph is crank Hp

[gamma500]

Really interesting, thank you.

[Gigglebutton]

Having multi cone sections gives the designer the ability to shape the power curve to the desired application.
Add to this 2 stage headers and you can achieve any wave amplitude correction needed with a 3 stage diffuser.
Here is a design I did for a Euro champ winning 50cc Malossi,it has a nozzle in the exhaust duct with an oval to round transition in the flange.
A two stage header, 3 stage diffuser with the steepest angle in the middle.
A killer pipe for the cylinder porting as it was used for long track racing only.
Graph is crank Hp

Hell!!! A 20hp 50. How hard is that to achieve???

[husaberg]

Hell!!! A 20hp 50. How hard is that to achieve???

Hell 21HP is even harder to achieve than 20hp

[husaberg]

Hell!!! A 20hp 50. How hard is that to achieve???

Whoops double reply on self for that one
That's 420hp/litre at the crank but that's super impressive and smooth curve too. Out of interest have you ever dynoed a ktm50 Wob.

[TZ350]

Currently Team ESE are using ATF in the box. We started using ATF back in the day (70's) when car oils started using friction modifiers and these ruined clutches.

ATF became a habit and now that there are better oils for motorcycle gear box's, we are doing a bit of research looking for a better box lube than ATF if there is one.

Husenburg has been very helpfull and sent me some links.

"Automotive oils, such as Castrol 20w50, use the latest in automotive additives classified as SJ. To qualify as an SJ rated oil, there are maximum levels of zinc and phosphorous that can be contained in the formula and specific performance levels that must be achieved using an SJ rated additive (i.e., mpg.) The levels of zinc and phosphorous in SJ oils is much less than those levels found in motorcycle specific oils. The government has also mandated to automotive OEM's that gas mileage must be increased in late model cars to help deter the negative effects of exhaust emissions. The OEM's can accomplish this task by adding friction modifiers to their oils, hence reducing friction and improving gas mileage.

The additional friction modifiers found in automotive engine oils will plate out on the surfaces of the clutch causing slippage. Those of us that use the clutch much increase our chances of glazing the clutch with every pull of the lever.

This fact becomes even more important when considering an engine oil for your 4-stroke bike that has a wet clutch. You must also now protect your engine with the same lubricant. Not only will the number of miles put on the oil likely increase, but it is also being exposed to the harsh environment of the combustion chamber. Keep in mind here that you want to look for an oil labeled Motorcycle Specific (JASO MA--for wet clutches) and one that is using an SG additive system (containing higher levels of zinc and phosphorous.)"

The complete link can be read here.

http://www.floridatrailriders.org/articles/techinf3.htm

A good read, well worth the trip.