yes .. its Radius ...

Look at the 4B10 piston .. no wonder so many complain knocking   

Zam from NPF is my friend friend..last monday go there lepak de...according to him,so far only 1 4B12 and 1 4B11T(evox) has send cylinder head to them...next monday go there again to buy tshirt.

OK Idiot sekalian ... I have made the Research on the 4B10  and 4B11 differences .. for idiots whom wanted to do this.. Good news..

The differences is just the Piston and conrod! .. crank shaft is the same..

[attachmentid=3508331]

                                    4B10 | 4B11
Basic diameter mm  |  86  | 86 |
Pin hole diameter mm  |  21  | 21 |
Overall height mm  |52.66 |  50.5 |

4B11 have shorter piston then 4B10

and the conrod ..

[attachmentid=3508351]
                                                4B10 |  4B11
Small end hole diameter (d) mm  |  21  | 21 |
Big end hole diameter (D) mm |  51  | 51 |
Centre-to-centre distance (L) mm | 153.55 | 149.25 |
now back to some basic calculation.
4B10 Bore -> 86mm
4B10 Stroke -> 77.4 mm

4B11 Bore -> 86mm
4B11 Stroke -> 86mm
How do we calculate the CC ?

((PI x (Bore / 2) x (Bore / 2) x Stroke ) / 1000 ) x 4

What is PI . 3.142 ... Go google.
the last one we X4 is because it has 4 piston

((3.142 x (86/2) x (86/2) x 77.4 ) / 1000) x 4
= ((3.142 x 43 x 43 x 77.4) /1000) x 4
= (449.659) x 4
= 1798 cc
For 2.0
((3.142 x (86/2) x (86/2) x 77.4) / 1000 ) x 4
= ((3.142 x 43 x 43 x 86 ) / 1000 ) x4
= (499.622) x 4
= 1998 cc
Now look back at the CON ROD I posted
4B10 -> 153.55 mm
4B11 -> 149.25 mm

153.55 - 149.25 mm = 4.3 mm differences
if u put this 4.3 into a JEJARI (sorry I dunno what is call in English) .. in terms of diameter .. 4B11 will be 8.6 mm shorter than 4B10, which makes MORE ROOM for the stroke .

Back to the spec .. 4B10 = 77.4mm stroke ... 4B11 = 86mm stroke
86 - 77.4mm = 8.6mm

So the calculation match .

SUMMARY in layman terms... to upsize 1.8 to 2.0 .. ONLY THE CONROD is SUFFICIENT. But then if you use back the same piston, compression might be too high.

Good luck in exploring 

153.55 - 149.25 mm = 4.3 mm differences
if u put this 4.3 into a JEJARI (sorry I dunno what is call in English) .. in terms of diameter .. 4B11 will be 8.6 mm shorter than 4B10, which makes MORE ROOM for the stroke .

Back to the spec .. 4B10 = 77.4mm stroke ... 4B11 = 86mm stroke
86 - 77.4mm = 8.6mm

So the calculation match .

SUMMARY in layman terms... to upsize 1.8 to 2.0 .. ONLY THE CONROD is SUFFICIENT. But then if you use back the same piston, compression might be too high.

Good luck in exploring 

Ceh,,, 12:1 compression ratio also no knocking

2.0 oso can go 2.4 in similar way?

Majority is korek, except for this part:
Why? Because engine displacement is calculated by the total DISPLACEMENT of the piston when it moves up and down the engine. e.g. I have a full bucket of water. I put in a big rock, x amount of water flows out. The displacement of the rock is x. I then fill up the bucket again, put in a small rock, y amount of water flows out. It's displacement is y.

So for the engine it's the same. The crankshaft for 4b10 11 and 12 is different because an 11 would need a greater THROW than a 10, 12 would need a greater THROW than an 11. This THROW is what makes the piston move up and down.

Am i making sense?

YOu are right... Confused myself last night. So yea back to square one. Crankshaft diff as well. The throw!

haha if it was this easy i would have gone down this path long ago..

yes .. its Radius ...

Look at the 4B10 piston .. no wonder so many complain knocking   

ok.. means no chance of cheapjing upgrade.. so can continue to the usual poison topics..

WTF.......why our 1.8 piston like hunchback of notredame.....     ,i can see why it's prone to knocking

it's to increase compression

it's to increase compression

He meant we r cheapskates

what happens if we just change the piston instead ???
 

kenny always so bold.. post things here.. u no scared ppl say u copy them ar? kopy ppls still so daring post here and there.. 

ok.. from now on we can become "troll" retiree.. start to become honest ppl..