ESE's works engine tuner

[husaberg]

Yip.

(placeholder when I find where I put it)

Also:
http://www.gearingcommander.com/

Thanks brent but i think there may have also been a populated excell spread sheet one.
I will have saved it (somewhere) oh that was easy
Was this from you?

[Frits Overmars]

You can also work out by dividing the end rpm by the start rpm to give you the range of the powerband:
13500/8500 = 1.588
11500/6500 = 1.769
as you can see the lower rpm powerband has a greater range.

That's the way to do it: concentrate on the power range. For road racing with a close-ratio sixspeed gearbox you'll need a power range of 1.4.
Anything more is convenient for the rider, but not really useful if he is good at his job. Anything less will lose you valuable time at some tight points of the track, which you won't be able to make up for at the straights.

[Andrei_Kazban]

Goedendag, Frits, mijn naam is Andrew en ik zijn al tuning motoren kart.U Ik heb een zeer interessnaya Research uitlaat. Als u geïnteresseerd bent, ik kan laten zien plny tekst, maar het in het Russi

[Frits Overmars]

Goedendag, Frits, mijn naam is Andrew en ik zijn al tuning motoren kart.U Ik heb een zeer interessnaya Research uitlaat. Als u geïnteresseerd bent, ik kan laten zien plny tekst, maar het in het Russi

добрый день Andrei. Yes, I am interested in your 'research exhaust' and I suppose so will be a lot of Kiwi forum members. So maybe it's better to communicate in English instead of Dutch or Russian .

[Andrei_Kazban]

These investigations are not mine, but one famous FSR.On produced a surprising number of glass tubes and used the high-speed camera to take pictures. Although the technology was practiced on a small motor it runs on all cubage.

[Andrei_Kazban]

http://forum.rcdesign.ru/f5/thread241866.html rar-file.wondering if I can help with translation

[teriks]

http://forum.rcdesign.ru/f5/thread241866.html rar-file.wondering if I can help with translation

I had a quick look on that paper, and would love to be able to read it. Seems to be a lot of really interesting stuff there for me. Correct scale of engines for me too

[FastFred]

For our am6 racer at kart tracks here in the UK we have a effective powerband range of 13500/9000 = 1.5

That's the way to do it: concentrate on the power range. For road racing with a close-ratio sixspeed gearbox you'll need a power range of 1.4.

Taking the the widest practical of TeeZee's graph ..... 13,000/9,000 = 1.4, for a 5 speed, so a little short, more work required. No doubt TeeZee will get it sorted.

[TZ350]

Taking the the widest practical of TeeZee's graph ..... 13,000/9,000 = 1.4, for a 5 speed, so a little short, more work required. No doubt TeeZee will get it sorted.

Thats interesting as it is the widest 2T graph I have seen posted on here and I would have thought that a 4k power spread would have been enough and I was only being gready trying for more.

Anyway it shows that I have been on the right track, looking to make greater effective width and there is more width needed.



For plumping up the bottom end a bit, FarmerKens ATAC valve looks like a good idea. Instead of the normal Honda ATAC butterfly he has made a slotted drum like the Suzuki RG400/500's have, I will be trying to copy it.

In fact FarmerKens bike had a lot of good ideas I will be trying to copy.

[F5 Dave]

I've got several other gears hidden in the left handlebar lever.

[richban]

Thats interesting as it is the widest 2T graph I have seen posted on here and I would have thought that a 4k power spread would have been enough and I was only being gready trying for more.

Anyway it shows that I have been on the right track, looking to make greater effective width and there is more width needed.

I like this way of looking at the power spread.

How dose that graph look with my FXR overlaid Rob. Coz that looks rather good. Put that engine in a sorted chassis and watch out.

I think they are the same a 8500 then yours just takes off nice.

Mine works out at 1.47 with a not so good 6 speed. Would love a close ratio for my bike. Must look into that more.

[bucketracer]

Thats true, Avalons bike that Chambers prepaired for her with Thomas and Bucketracers help annihilated everything when she took it out, its just a pity she is to busy riding in other classes to have been able to bring her F4 Bike to the recent Bucket meetings.

As I understand it (correct me if I'm wrong) the bike that Avalon was riding was 24HP, with a different pipe and suitable blowdown time.

Its pretty much the same in all the important ways as TeeZees current engine. The big difference is Av is a top notch rider and she and her bike weigh much less than any other F4 rider bike combo that I know of, other than possibly Nate D.

[Bert]

Its pretty much the same in all the important ways as TeeZees current engine. The big difference is Av is a top notch rider and she and her bike weigh much less than any other F4 rider bike combo that I know of, other than possibly Nate D.

or possibly Rogan from welly..

[koba]

or possibly Rogan from welly..

Rogan's bike is currently a bit heavier (250 frame, albeit a very small one).

[koba]

I've had a play with my ignition.
I need a better measuring stick and a rev counter to get a proper measurement but the timing light seems OK until at least really high revs, the rate of change that I see by the strobe seems smooth and consistent.

Has anyone purchased a timing dial guage? recommendations? I was considering making a fixture for a dial guage that I can borrow and using that.
I'm gutted to find that the local tool shop have just stopped running a special (huge discount) on some precision measuring equipment.

From my rough measurement it looks like the advance curve spans around 29.5 degrees. That seems like a lot?

I'll post some more once I make it presentable.

Oh also, once I get a better idea of the ignition curve nature I'm going to have a go at simulating an engine based around that. It may be an option for a interim build plan as My engine is very mild at the moment.