SNAIL

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

Hi. Here is something about snailer AK-5's project. Engine is now in this 2cv only for testing, and it will be on other, older 2cv with suicide doors in someday...

This time, "testbench" looks like almost normal 2cv, only 2" sidepipe may tell there is something different than standard engine..?

Engine bay, first start with these parts..:

-visa engine with 7:1 compression ratio
-292 degree camshaft with raised valve opening
-ported cylinder heads
-bigger valves
-"worlds smallest" turbo what can find..!
-Megasquirt'n'Spark
-wideband lambda controller
-Ami8 final ratio on 2cv6 gearbox
-anti-rollbar at front

Next there is going to be GSA gearbox, so there will be better brakes in future. In fact, there will be ventilated discs... But we didn't manage to get this gearbox ready to this testdrive, there were problems enough to solve without it...

Another thing what is missing now is intercooler, there wasn't enough time to make that and piping for it... But there must be cooler, at "normal" driving speed there was manifold intake temperature over 80 degrees, it is way too much... And of course this kind of temperature "eat power"...

More photos here, this fun last after 340 km, and after that turbo's bearings broke... Seller told that it must be something problem with turbo, not with installation, so this will be continued when we get new turbo..!

And how it was to drive..? Fast, funny, easy, fast... With little throttle opening it ran easily 110-120km/h, and after that when hitted pedal there was something what makes us to smile... Rolling Eyes

We'll be back..!
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Make it today, tomorrow it's probably illegal...

backfire · Posted: Mon Jul 12, 2010 9:09 pm Post subject:

Good to sea this Jasu, I have also Visa with 1:7 compression and turbo on the same location, I only had problems on how te put the exhaust from cilinderhead to turbo. Great work. I see you plan to do something for heating window?
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2CV, with Visa turbo charged

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

Heating tube system was planned when there wasn't front wings installed, so there will be some modifications becouse there can't be added any heating tube now on these... Embarassed

Just got picture of manifolds, they are totally custom made... As You can see, there isn't too much room for anything... Rolling Eyes

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Make it today, tomorrow it's probably illegal...

backfire · Posted: Tue Jul 13, 2010 1:00 pm Post subject:

Is that also daihatsu turbo? Looks exactly like mine.
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2CV, with Visa turbo charged

backfire · Posted: Tue Jul 13, 2010 1:10 pm Post subject:

Hi Jasu, if you pass the exhaust underneath to the left side you could use that for the heating tube, just an idea.

I also notice that your airintake is from within the bonnet, maybe smart idea to take the air from outside.
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2CV, with Visa turbo charged

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

backfire · Posted: Wed Jul 14, 2010 5:30 pm Post subject:

If you change air intake maybe you don't need the aircooler? Still like your setup very much Jasu.
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2CV, with Visa turbo charged

motomotie · Posted: Wed Jul 14, 2010 6:17 pm Post subject:

nice!!!!

ealandbob · Posted: Wed Jul 14, 2010 8:57 pm Post subject:

Hi
Could you tell me how you acheived the 7:1 compression ratio on your 652 visa engine
cheers
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Plastic is Fantastic

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

It's quite easy to lower compression in Visa, exept earliest version, put couple gaskets between cylinder and block. We calculated that should be quite near 7:1 compression ratio...
_________________
Make it today, tomorrow it's probably illegal...

backfire · Posted: Wed Jul 14, 2010 10:14 pm Post subject:

haha sounds famliar, i did the same, made an extra gasket from alloy. Total is approx 2mm if I am not mistaken.
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2CV, with Visa turbo charged

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

Tomorrow, back to garage with new turbo... Rolling Eyes

Let's see what happens..?
_________________
Make it today, tomorrow it's probably illegal...

Bart · Posted: Mon Jul 19, 2010 6:13 pm Post subject: Re: AK-5's 652 turbo-ie

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

Jasu · Dropped Joined: 30 Sep 2007 Posts: 211 Location: Finland

It's alive again..!

Only what we had to do..:

-new flanges for turbo
-new first part of exhaust pipe
-some modifications for turbo
-bracket for wastegate
-EGT-sensor to manifold
-oil pressure monitoring to turbo oil-line

-and again tuning of fuel maps...

Some extra-work also came, need to move starter motor gear on flywheel and try to solve massive fuel leakage at top of fuel tank...

More pics are coming when I'm back at home, now there is still 200 kilometres for me to go and AK-5 have nearly 500...
_________________
Make it today, tomorrow it's probably illegal...