Regen

Yeah, there are other things to consider rather than just mixture. Also, no intercooler? You are looking for trouble lol.

This winter I will start engine upgrades. Every part will be custom built and machined, evidently, so it will take a while before everything is done and put together.

Plan is forged internals, aggressive camshaft, ported head, aluminum intake plenum with large diameter runners and whatever else is needed on the side (upgraded valve springs, piston rings etc). I am looking to improve volumetric efficiency of the engine in order to move inside the efficiency zone of the turbo, then having the forged internals I can increase the boost as well. Looking to build 150 hp or more, depending on what RPM the engine will spin. Currently it has a flat power curve under the 5900-6500 range and cutoff is set to around 6800. This is already higher than stock considering 0 engine mods. Stock NA it made peak power at 6000 rpm and would cutoff around 6300 or so.

With the camshaft, ported head and short intake runners, I believe it will be able to spin over 7500 rpm.

misiozol

Yes but short intake will cause lots of trouble on idle , more less there is no point boring and using bigger pistons as crank shaft will crack , I was working as a engineer in daewoo corp and let me tell u I'm still amazed that it did not happen yet , much more efficient will be to fit 1.0L or 1.2L engine and drop CR in it to ~7.5:1 then u can make more boost much safer and much more fun

Serj

The program was corrected and filled the local chip tuner.

Serj

It is impossible to consider everything. This proves that even standard motors fail. At the moment the boost is 0.5 bar, the air at the time of compression does not significantly heated. If the street is +20 then at a pressure of 0.5 V receiver not more than 50 degrees. Which is quite acceptable, given that the winter is coming. And the intercooler is in the works. In the spring I will put. And then the pressure raised to 0.8 bar.

The head I ported. Valve issue with the slim leg, the camshaft tuning is "Dynamics". Crankshaft with pistons and connecting rods from the Aveo 1,2. The engine without the turbine did not go bad, 11 seconds to 100 km/h But after installing the turbine car not know. In the version in the photo that goes 9 seconds to 100 km/h.

Regen

Yes i am aware it will hurt functionality at idle but i am not concerned. I am looking for top end.
Since custom parts will be necessary anyway , I'm betting I can sport for a forged crank as well. I don't plan on boring/stroking because the clearances are small anyway, just make the parts stronger and throw more boost at it.

I have looked into the specs of the 1.0 engine. From the bore/stroke data that engine should rev even more than the 0.8 in stock NA form, however it does 500 rpm less so that means the head/intake design is extremely inefficient to begin with. Plus, swapping a moderately bigger engine like a 1.0 or 1.2 is pointless work from my view, i would have to throw away everything done so far and restart on that. If i would be interested in a swap I might as well throw a V8 on it and call it a day lol.

I simply want to get as much as I can using the stock displacement and block, just to prove that I can lol. End goal for this car would be 200+ using a compound turbo setup.
This 0.8 Suzuki design little engine seems like it has a lot to offer.

misiozol

Well whatever float ur boat they say , from what I remember this crankshaft is very stressed anyway, keep in mind if this goes sideways it goes with big bang would be sad to see it .

Regen

It probably held up ok so far because peak torque is made at such high RPM (compared to a diesel where you can get all that torque right from the start line), that and the fact that the car has no grip early on. Do you have any idea what torque values the stock crank is rated for?

misiozol

That I had about matiz was about 20years ago so loong time ago, and dont truly remember , but from what I recall there was an issue with crank in 800cc as i think it was same as tico but it did not passed stress test and needed additional strengthening hence there is small pressed curvature on it just by bearings but for how many Nm it is well not much

Regen

So do you guys think I could get away with launching in second gear for the next competition I will attend to?

This car's gear ratio's are 3,82:1 in 1'st gear and 2,21:1. Final drive is 4.44 while tires are 175/60R13 (for now at least)
Two step is set at 5k rpm and that's where the peak torque occurs as well.

As you can see from the video posted in the previous page, 1'st is basically full wheel spin, the shift to second happens just before 60 ft, then more wheel spin until finally at around 50 km/h it starts putting some power down.
I'm thinking with such short gears I could get by with launching in second, especially as I have the two step and anti lag assisting the engine and keeping it in boost range.

The 60 ft time and overall ET could improve immensely.

misiozol

Just curious hows project going ?