Project X

[Alan H]

You might find that the stat & heat sensor are in a bit of a dead zone as regards true temperature readings. I was chatting with Richard on here about that very subject a couple of days ago & the standard sensor on his Hippo tends to transmit readings hotter than the actual water. A sensor in the rubber tubing would be more accurate perhaps.

[madforitkev]

I've got a sensor near the head and one at the radiator return.

One feeds the ECU and one controls the cooling fans. I may consolidate them in the final build but will see what the next dyno run gives.

I can also mess with water pump speed to maximise the cooling effect.

Finally, I am working on some new ducting to both help the fuel injection and the radiator cooling. All good fun.....

[teazer]

Very presentable power already. AFR is a bit lean at times though. See if you can fill that hole or flatten that hill or however you look at it. Somewhere around 12.5.-12.8 is often the right number for full power pulls.

168 is about where I like to run a GT750 and I have yet to fail a stock head gasket. I use Cometic gaskets exclusively and they are ordered to a certain finished size which you can specify. I like to go 1mm larger than the bore to allow for minor misalignment and movement. Stock type 76/77mm bore head gaskets are a waste of time.

Transfer time can be increased but blowdown is always an issue with those motors, so i prefer to go as wide as possible on transfers but try to avoid breaking through on the two outer ports.

[garry55]

Hi Kev
Hows the project going?
Thought this might interest you - a fuel injected Moto Martin Kettle.

[badgereng]

That’s a beauty

[madforitkev]

That is very pretty!!!

Sorry I have been off line for a bit. Too much work and struggling with cylinder head issues.

The last dyno saw bypass into the water jacket.

This was with with copper Wills rings fitted which I really hoped would do the job but a combination of vibration at high RPM and poor sealing surface just didnt work out.

Anyway... I've gone back to a Cometic gasket and filled the barrel Wills rings grooves with weldmetal to create a wider landing surface for the main barrel seal.

My compression has dropped from 170 psi to about 155, so still pretty good compared to a standard gasket at around 125psi from memory.

First garage run didn't go well and when it got up to temp I had overflow again, like I was pressurising the cooling circuit. Bit of head scratching and a radiator cap test and my cap was releasing at about 0.8 bar which is too low.

I found another ebay one which releases at about 1.2 bar which is nearer normal.

Todays run was much better. I added a pressure gauge to the cooling circuit so I can watch temperature rise with pressure.

At around 70C it is just over 1 bar. I have my cooling fans set to 75C and when they cut in the effect is very marked and the pressure drops to under 1 bar. No leaks! This is static in a garage with no air flow.

I have two cooling fans which I can program separately. Ideally I want to operate at around 60C so I am going to play with the water pump speed next to make sure I get enough dwell in the radiator and I will have one fan cut in early (60C ish) if pump speed isnt enough. Kettles naturally run around 80C I believe but my twin Rad setup should get temps lower with a combination of pump speed and fans. Lower temp, more power!!

So back on track hopefully.

[madforitkev]

So far the bike seems pretty stable and the cooling fans are doing the job. MOT again next then a few rides before back to the dyno.

You may remember I designed a fairly complicated electronics system for the bike with LCD displays etc.

Well I've got another little project on the go.....it's an AWD 400HP Turbo Mini

For this I have decided to design an Android dashboard and looking at it a bit more I realised the Kettle would be a much elegant design with one as well.

It is basically fed with data from the Speeduino ECU with a few bits added. I will try to retain the retro clock look I have but this should be a clean addition!

[badgereng]

Love it