ESE's works engine tuner

[koenich]

Thanks for sharing Wobbly!

Decreasing the thermal mass should improve the transient behavior while coating it will likely need new pipe dimensions in my opinion.

[Peter1962]

Admiralty bronze. Nearly the same conductivity as Cu but a lot stronger.

85-5-5-5 is the best naval bronze.

[teriks]

I am going to now modify a new cylinder to have the water passages out to the flange face as I have shown before.
Then test using stainless for the spigot, as it conducts heat way less than mild steel, then try a copper one.
But I worry about the strength of a copper spigot,having to hold up the pipe on a kart.

If you need higher strength than pure Cu, the CuBe alloys are good candidates for that application. Beware of breathing Be dust and fumes though.
https://materion.com/products/high-p...y-3-10-10x-310

[lohring]

The aluminum pipes like those pictured have been used on 26 cc marine race engines for a very long time. The main reason for all the water cooling is to preserve the o-ring seals. Both the exhaust flange and the header to pipe connection are water cooled. I doubt that you could get one of these engines to detonate since they are happy on 50 octane camp fuel. The basic ideas might be usable on high performance engines, though. We always felt that steel or stainless steel pipes worked better. Again we often ran a water cooled exhaust flange to preserve the o-rings.



Lohring Miller

[peewee]

hey guys im making new fuel tank for my methanol nitro bike. maybe it wont win any beauty awards but atleast now I can get rid of the original 13 liter enduro tank . new one will be around 4 liter. ill get a photo when its finished up. only about 2months and it should be warm enough to ride again

[husaberg]

hey guys im making new fuel tank for my methanol nitro bike. maybe it wont win any beauty awards but atleast now I can get rid of the original 13 liter enduro tank . new one will be around 4 liter. ill get a photo when its finished up. only about 2months and it should be warm enough to ride again

Make sure you pickel the tank before you use nitro in it.

[Frits Overmars]

hey guys im making new fuel tank for my methanol nitro bike. maybe it wont win any beauty awards but atleast now I can get rid of the original 13 liter enduro tank . new one will be around 4 liter. ill get a photo when its finished up. only about 2months and it should be warm enough to ride again

Hey Peewee, wouldn't it be simpler to use an old extinguisher or similarly-shaped container? By the look of things your new tank might endanger your suit and your private parts....

[SwePatrick]

hey guys im making new fuel tank for my methanol nitro bike. maybe it wont win any beauty awards but atleast now I can get rid of the original 13 liter enduro tank . new one will be around 4 liter. ill get a photo when its finished up. only about 2months and it should be warm enough to ride again

And i have started a projekt like your cylinder(well almost anyway)

I have butched up a cylinder to reach everywhere i need to go with my grinders.
I will be a lot of welding before done.
After all is done i will resleeve it.

And a question to all: is 7075 or 6082 aluminium any good for nicasilplating?

Edit: misspelling

[Frits Overmars]

And a question to all: is 7075 or 6982 aluminium any good for nicasilplating?

You'd better check with the company that is going to do the job Patrick. Not every company can handle every kind of 'suitable' alloy.

[peewee]

And i have started a projekt like your cylinder(well almost anyway)

I have butched up a cylinder to reach everywhere i need to go with my grinders.
I will be a lot of welding before done.
After all is done i will resleeve it.

And a question to all: is 7075 or 6982 aluminium any good for nicasilplating?

nice project mate.

maybe you can find out what material the cyl is and make a new sleeve from the same material. then weld the sleeve in place and replate it. try to use some kind of heat sink on the top deck if you can, as it will reduce distortion up there. also preheating the cyl to say 93c in a oven also helped me a lot. afterwards I would put it back in the oven so it didn't cool rapidly but im not sure if this did any good

[TZ350]

If you can sample fast enough to capture the raw signal that would be best.Consider using the Teensy microprocessor, arduino compatible programming wise but faster processing.

I'm still going down the crankcase pressure route, I've started writing some pseudo-code for measurement vs. crank angle. I think your system is better since you can have your injection starting very early.

Residual cylinder pressure or crank case pressure, the answer has to be there some place, between us I expect we will find it. I like your crankcase pressure rout as its easier to implement than drilling a fine hole into an NSR cylinder and getting it just 10 deg or so before exhaust port opening. But residual cylinder pressure is precise, there is either residual combustion pressure or not.



The Teensy microprocessor you suggested looks good, this one even has an on board SD card that could be used for data logging. Because adapting a 4T fuel injection system is difficult I might have to consider making my own EFI CPU based on the Teensy.

[husaberg]

The Teensy microprocessor you suggested looks good, this one even has an on board SD card that could be used for data logging. Because adapting a 4T fuel injection system is difficult I might have to consider making my own EFI CPU based on the Teensy.

This is the assembled ECU
You can get the kit cheaper controls fuel and ignition with data logging.
https://www.diyautotune.com/product/...assembled-ecu/

you can also just buy the bare ecu cards
http://megasquirt.info/products/diy-kits/microsquirt/
https://www.megasquirtnz.co.nz/
http://microsquirt.com/viewforum.php...2bfaeae1858585

[DoldGuy]

And i have started a projekt like your cylinder(well almost anyway)

I have butched up a cylinder to reach everywhere i need to go with my grinders.

SwePatrick,

1851 Cylinder? I am interested in removing 3-3.5 mm from the top of Cylinder (72mm Bore) but was not sure there was enough material....it looks like you removed more than 3.5 mm? Is there enough material left at the studs water jacket area if the bore was a 72mm? Also when going to a 72 bore it removes some of the hook in the transfers (Mains & Seconds), is there enough material there to grind the hooks back in with out hitting the water jacket?

The exhaust does not appear to have hardly any coolant flow area as Wobbly confirmed is much needed. What are your plans for the sub/auxiliary exhaust ports? Is there much material between the water jacket & Port?

[dutchpower]

Hi Frits

Exhaust width smaller and transfer time area from 132 to 128 give's more power in sim

[jbiplane]

And a question to all: is 7075 or 6982 aluminium any good for nicasilplating?

I plate cylinders in my shop and know a bit

The rule is simple the more of Cu and Zn in alu alloy the worse nicasil plating.
In general not recomended Cu content more than 0.5% and Zn more than 10%
For hard cases better use sublayer of chemical Ni plating and thermal processing before galvanics. We have as well an experience in complete chemical coating which have some + compare galvanics (required just cosmetical honing to hold oil).

Rather good for nicasil coating is casting of AlSi7Mg