ESE's works engine tuner

[jfn2]

Are the Pankl pins welded up in a vacuum?

Thank you woobly for your reply.
jfn

[wobbly]

My take would be the pins are welded in an Argon chamber as I have used in the past for Titanium pipes.
As there is such a tiny heat affected zone from the laser proces, its easy enough to press a cap onto one end , then flush the pin and press on the the other end,
then weld around the circumference .

[Peljhan]

I don't know if it was mentioned before but from what kind of steel it's good to make rotary disc? What is prefered thickness and case clearance? Thanks

[Flettner]

I don't know if it was mentioned before but from what kind of steel it's good to make rotary disc? What is prefered thickness and case clearance? Thanks

I make mine from spring steel sheet, laser cut out, Ill go and measure one but I think approx 0.7mm.

[OopsClunkThud]

to get around the short circuiting, couldn't you add another set of aux ports ~ over the B or C Ports? Unlikely to flow that much except when the pressure is high (blowdown)

[TZ350]

I don't know if it was mentioned before but from what kind of steel it's good to make rotary disc? What is prefered thickness and case clearance? Thanks

I make mine from spring steel sheet, laser cut out, Ill go and measure one but I think approx 0.7mm.

Mine are made out of 1.0mm thick laser cut stainless steel with 0.25mm (Suzuki) to 0.5mm (Kawasaki) side clearance. I would have preferred spring steel but the SS one's were free and when it's free you takes what you get.

I have run spring steel and stainless in both plain alloy Kawasaki outer covers and the Suzuki outer covers with the phenolic wearing surface. Both worked Ok.

[lodgernz]

I don't know if it was mentioned before but from what kind of steel it's good to make rotary disc? What is prefered thickness and case clearance? Thanks

I made mine out of 1.0mm carbon fibre sheet, running with 0.5mm clearance total. Disk floating of course. Still going after 2 years racing.

[wobbly]

OopsClunk - Aux ports around past bore center have been tested , and they loose power.
The issue is that looking in plan the Aux path length is way longer than the main ports distance from the diffuser entry.
This is also why when the Aux are made too high ( close in timing to the main ) there are two opposing factors at work.
The extra Blowdown STA can and will help with overev Hp , but the opposing factor is that the steep wave front created by the main port cracking open
is smeared in time and reduced in amplitude by the flow suddenly exiting thru the longer Aux ducts almost simultaneously.
This results in a loss in mid and peak power .
The badly affected amplitude downside issue in this case overcomes the technically greater Blowdown STA capability.
So moving the Aux entry point even further away from the header , would have way more downside than any gain from a reduction in port linking.

[Frits Overmars]

Fritz is right as usual....Sorry for my substandard spelling

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[Muhr]

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Sometimes I surpass myself!

[yatasaki]

I don't know if it was mentioned before but from what kind of steel it's good to make rotary disc? What is prefered thickness and case clearance? Thanks

Like Flettner said, spring steel 1000N/mm2+ or by our local grade Č2330, or simmilar.
If sheet not available this would fit perfect (just test with magnet to be sure if stainless or not)

[Peljhan]

Thank you for all the answers.
I will get some spring steel.

[katinas]

I think the problem are the Jim Lomas pipes. They were designed for the stock NC19 with a belly diameter from only 102 mm. So for me it looks like that the pipe volume is too small. When using a 120 mm belly even a 22 mm stinger venturi brings the temps down to an expected level....

For comparisons add Sugaya kit pipe dimensions, that specially developed for NS 250/400 vertical cylinder (without ATAC). Works in good way from 7000 to 10500 rpm. Tuned length 936 mm. Its not usable for 500 kit, but maybe helps for std, one exhaust cylinder, setup

[TZ350]

Ok, so she is not riding a motorcycle but there you go.......

[TZ350]

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Magic stuff. More two stroke stuffing ........
.