ESE's works engine tuner

[kel]

re the water injection (Ill dig out the article for you) Honda also stated they could achieve the same results from other methods such as ignition, powerjet etc, so there was no point in pursuing. Think it was Doohan bike they tried it on, he came back saying dont bother.

[TZ350]

Your photo gives away that your injecting something direct into the cases, do tell.

No, not injecting, that is/was the take off for a pumper carb,

I used the pump part to scavenge the plenum. I will keep the fitting there just in case I try a full blown pumper slide carb from a kart in the future.



The clear cover was suggested to me by someone so I could see what was going on and Yow Ling suggested trying the straight shot carb idea just to see if that helped reduce fuel/oil drop out and/or increase power.



I had been working on the plenum idea with its 32mm throat as a way of getting around the restriction of the 24mm carb rule. But 24mm has proved to be not as restrictive as people, myself included, thought it was.

The plenum may still have other uses, I think it or a variant might be usefull in broadining the power spread. As I have figured out a way to make a variable inlet throat that can be changed from 22mm to 34mm with the IgniTech's power valve controler. It may also be possible to extend the idea to variying the closing point of the rotary valve.



I will come back to it after I have finished playing with the 30rwhp side port barrel. At the moment its a peaky beast, I hope to get it useable with a bit more development.

[bucketracer]

currently the insert is in blank form, but that's the next step.

Attachment 234617

We will be needing to do something like this too.

Did you make the insert or is it something that can be bought semi finished and you machine it to suit.

[Bert]

We will be needing to do something like this too.

Did you make the insert or is it something that can be bought semi finished and you machine it to suit.

Off the shelve (blank), I'll send you the details. I was/am going to use it to make a copy then there will be no argument between after-market and raceparts...

[TZ350]

Dont waste your time and energy re water.
Honda did it with full PWM solenoid control - it bumped up the bottom end really well, but the water mist in the pipe kept it cool for so long down the straights that the engine never really recovered in time to get the top end back.
Another expensive blind alley.

Yes, it may prove to be a blind alley, but I have all the parts and have had my heart set on trying it for so long that I just have too.

The issue with the motor staying cool and not recovering the top end could be a blessing in disguise. As it could be an easy way of making a top end motor suitable for Mt Welly where its more about drive out of the corners than top end.

Or thumb on the button for water and drivability up the infield hill at Taupo and then across the top with no button to let it dry out in time for the faster bits out the back and the front straight.

The plan is to do several all out runs on the dyno without water and several with to find the base lines and changeover point.

Then a few runs on the dyno with it changing over should tell us all we need to know.

[F5 Dave]

. . .
so this is what we started with, standard TZR head complete with crappy noise reducing squish (apparently), welding this was never really going to work out well:
Attachment 234615

. . .

Weird, never seen anything like that.

But I don't buy it. There is no explosion to create noise, the noise is the gas entering or exiting the engine. When squish is occurring the combustion chamber is isolated from the ports. How can this reduce noise?

[TZ350]

Had a great day Sunday, riding a borrowd RG50. Those F5's are so much fun I have been inspired to get back into working on my own 50.

This attempt at improving my 50 has nothing to do with the fact that Will beat me in every race Sunday.

Reduced the angle of the case reed, cutaway the spigot and flowed the reed into the transfer ducts.

[F5 Dave]

I've gone flatter than that, look at an RG250 or RM.

Why have you flowed from the base of the reedblock into the transfer?

Tip. RG engines are canted forward in their chassis. Make sure you take account for this when working out what angle your carb will end up at unless using something like a NS400 super steep downdraft. I prefer to spot on a flat plate & bolt aspigot, like a GP125 one if 24mm carb, or there is a bigger one (maybe X7??) that will take a 28. Isn't much fun when the carb falls off a simple tube type.

[Gigglebutton]

Thanks for lending me one of your bikes on Sunday. Well impressed with the fat power spread. Keep up the good work.

Dazz

[TZ350]

Why have you flowed from the base of the reedblock into the transfer?

Thanks for the tips on the reed and carb.



The porting from the case reed to the transfers was an attempt to emulate these inlet side ports that go from inside the inlet to the transfer.

[Henk]

Had a great day Sunday, riding a borrowd RG50. Those F5's are so much fun I have been inspired to get back into working on my own 50.

Getting a loaner ride on Cullys' last month has me looking for one as well.
Then I borrowed it again Sunday and broke it, now I need one instead of wanting as I hate wrecking other peoples toys.

[F5 Dave]

Hmm, those barrels on the right seem familiar from somewhere (CPI like on my 500) (edit, not they're not, think they are Cub CPI rather than Cheetah, see pic). But obviously the reed blocks are somewhat different to the suzi setup.

[TZ350]

Gigglebutton running 3rd on his F5 RG50 in F4 and going for the Doctor trying to beat all the FXR150's.

http://www.youtube.com/watch?v=v1pT-Tt_yMs

And finishing with the classic Deck-Inspection.

[Rick 52]

Thats what I did !! Great pass from Conner...

[TZ350]

Crank re-balanced for 50% and machined for more clearance and subsequently increased crankcase volume, there are no other changes to the engine.



Ran the small crank that has the 2mm (1mm is Std) clearance everywhere between the crank and cases, on the dyno tonight.



Old crank, blue line, new big clearance crank red line, poped a head gasket on the 3rd run.

Not looking promising at this stage, a few horses awol but at least the vibration has pretty much gone.

Ran out of time to fix it and play with the ignition and jetting, tommorow night hopefully.