Rate My Engine 1.2L Eco Turbo

[gt1cooper]

Here you guys go. Only slightly more expensive, and a fairly good engine on all counts.

[Dragawn]

Well, I've gone for the very cheap solution, just 125bhp, but if you want more power you probably shouldn't be using a 1.2L engine

[KD14]

Dragawn your engine is amazing, i just think that it needs to rev more to have a better power band. i would like to have your lua if you agree.. lol

Very good engines on this tread, i learned a few things and also about the exhaust size, it improves the engine a bit with this style of tuning, its just that on my original engine it made no change.
I revised the engine in the direction towards irkie's engine to see if it gives better performance in the testing, and it is, 0.4 seconds faster 0-100 km\h and a and 0.07 litre more per 100 km with the gearing set for minimal fuel consumption for both engines. (the car is the compact sedan and the weight is 1200kg)



But for a compact saloon i think its getting a bit too expensive, even my original SOHC in my opinion. Dont forget that this engine competes with a 1.6L with 500 - 600 material cost.

About the iron cast engines, i think they are too heavy, those who weights 140kg moves the CG 2% forward and today i think all of the 1.2L engines in the real world moved to aluminium too.

[Dragawn]

Well my it was my trade-off to sacrifice some rev range in order to get better stats, but here you go :

1.2L 20V DOHC Turbo ecoRev0.lua

(61.97 KiB) Downloaded 211 times

[KD14]

Aha! your engine is getting stressed at 5800rpm, thats not good.
So the tuning methods iv learned from this tread:
-In turbo engines its better to have retart ignition and higher compression
-The mixture should be even leaner then i thought
-Sometimes its better to have bigger exhaust on turbo engines

I still stick to my SOHC aluminium head and block though

[Irkie500]

Compression only goes so far before the gains start to fall off. Take any engine and max the timing to 100, then flip flop that scenario and go for the highest compression possible. You will find that the higher timing motor will get quite a bit more power and be more responsive. Extremes on both ends however are not good, and often finding a balance between the two is your best bet for a solid baseline, then adjust from there.

Also KD14 you made your engine 50cc larger, a small complaint but one that does effect the outcome nonetheless.