ESE's works engine tuner

[SS90]

Why.......

OK, think of it this way, Teezee has just made some good points in relation to his continued optimism, and I will in no way intentionally discourage him, and indeed be glad to be proved wrong.

But, from all the explanations Teezee has given regarding his "blarhhhrrr's", he has indicated that the way to (drastically) reduce this is by 1) reducing the inlet area and 2) increasing the manjet size.

OK cool.

When the "Blarrrrgghhrs" come on, there is significant standoff coming out the carb.

This should simply not happen.

This would indicate that, like Teezee said, essentially the carb (which, can of course work both ways) is "pusing the fuel out the wrong way"

A reed valve would stop this.

Although, this indeed my cause the plenum to overfull, and his "blowoff valve" may indeed be worked even harder, ..........particularly if the inlet timing is reduced.
Kind of like stuffing up your inlet timing on a Piston ported two stroke.

The dyno is the correct way to go for sure, because as Teezee has pointed out, he needs to see if there actually any gains, which is all he needs to kow if he is going in the right direction.

I should watch Buckets4me's youtube video now, I would like to see how it sounds.

[SS90]

I should watch Buckets4me's youtube video now, I would like to see how it sounds.

Bastards!

[Buckets4Me]

I should watch Buckets4me's youtube video now, I would like to see how it sounds.

wish I had some
maby next time I will arange it
or if I get to go to the dyno I may take the video camera

[jasonu]

Yes, its easy to increase the duration by cutting an existing disk but reducing the duration to something less than std requires putting metal back, it means drawing one in CAD then having it lazar cut, and getting the fine teeth with their little radiuses cut precisely right to match the driving dog, I have found to be a bit of a trick.

I didn't think of that.
Maybe you could cut a sliver from another disk, clamp the whole thing to a copper plate and CAREFULLY Tig weld the 2 together. There used to be a product called magic mud available. It is a clay like substance you put right near where you are going weld as a heat sink.

[TZ350]

But, from all the explanations Teezee has given regarding his "blarhhhrrr's", he has indicated that the way to (drastically) reduce this is by 1) reducing the inlet area and 2) increasing the main jet size.

I probably didn't explain the symptoms very well, or maybe I am more familiar with them now.

I don't see the blarrrs as being related to the main jet.

The blarrrs are RPM related, around 5,000 is my guess.

When the motor is in the blarrrrs it is possible to hold it there by opening the throttle to wide.

Reduce the throttle and the motor will slowly work its way through the blarrrs

or by carefully blipping the throttle at 3-4,000 rpm I could zing the motor past the blarrrs.

With the jets I had to hand I quickly got the carburation so that the motor started, idled and pulled strongly up to half throttle, then it fell flat on its face.

It took a few days before I had found/purchased the right main jets, now it pulls strongly at full throttle too, so long as the rev's are above 6,000 or so.

I think the carburation is pretty well right but this is not a setup that will take a big handfull of throttle and I don't expect that will change.

In dealing with the blarrrs I see the issues as now being port/time/area and tuned length of the 34mm induction tract.

I started this to try and emulate the big carburation of the unrestricted 100's totally forgetting they were being reved to 12,000 rpm.

I had also brought into the "Shorter is Better" inlet tract theory.

My current port/time/area is good for the big rev but totally excessive for 9,000. I see this as the source of my blarrrs problem.

Along with an induction tract that is to short.

[TZ350]

Ok. made a few changes and we have now beaten the blarrrs....

[Buckets4Me]

Ok. we have now beaten the blues....

that good for you
now keep taking them pills will ya
did you make a smaller rotary valve ??

[koba]

Ok. we have now beaten the blarrrs....

Did you use a big stick?

[TZ350]

did you make a smaller rotary valve ??

No. added 35mm to the inlet tract, now the tuned length, diameter and port/time/area are all in the same ball park.

If the plenum idea shows promise on the dyno, we will set about optimising everything.

While working through the issues, I just had to apply some logic and reasoning, and I knew it would come right.

When it was broken down into steps, I could see, that logicaly it had to work.

[Buckets4Me]

what day are you going to the dyno ???

[TZ350]

what day are you going to the dyno ???

Don't know, John is away on holiday......

[TZ350]

Did you use a big stick?

No. but if they come back I will wack em with a stick, the little bastards....

[bucketracer]

and indeed be glad to be proved wrong.

SS90, a happy day for you, with some logical reasoning Dad overcame the plenums blarrrs problem.

[SS90]

SS90, a happy day for you, with some logical reasoning Dad overcame the plenums blarrrs problem.

......... I look forward to a youtube video of the bike on the dyno, as well as a dyno graph.........

When I finish my latest exhaust design, I will do the same......

[TZ350]

......... I look forward to a youtube video of the bike on the dyno, as well as a dyno graph........I will do the same.......

So, if I show you mine, you will show me yours............

I will be happy to look at the video of your results if you want, and the boys can bring a video camera along if they like. If my bike does anything exciting like catch fire or blow up they can put it on U-Tube.

A blowup or failure I am happy to laugh about, but if it goes real well on the dyno I might like to keep the exact results to myself as a suprise for Taupo.......or the BOB