bro .. its illegal .. so its in whatapps ..

u know la.. later we talk engine oil ppl will laugh

i still prefer ur avatar .... 

Bore = Diameter .. width of a piston .
Stroke = how much distance the piston travel from TDC to BDC

4B10 -> Bore = 86mm  Stroke = 77.4mm
4B11 -> Bore = 86mm  Stroke = 86 mm
4B12 -> Bore = 88mm  Stroke = 97 mm

Calculation pretty simple ..
PI x ((Bore / 2 )^2)/1000 x (stroke) x (number of piston)

PI is constant = 3.142

take 4B10 as example ..

(3.142) x ((86/2)^2)/1000 x (77.4) x (4)
(3.142) x ((43)^2)/1000 x (77.4) x (4)
(3.142) x (1.849) x (309.6)
= 1798 cc ...

4B11 as follow ....
(3.142) x ((86/2)^2)/1000 x (86) x (4)
(3.142) x ((43)^2)/1000 x (86) x (4)
(3.142) x (1.849) x (344)
= 1998cc ...
TADA!

Now .... story can continue ..
increase either BORE SIZE or STORKE will increase the capacity ..
due to the reason 4B10 / 4B11 same block but diff stroke kit ..
that is why 4B10 can stoke it up to 4B11 spec!

Longer stroke .. engine slower response ..

KOPY KOPY KOPY


Prof. Dr. K3..

of coz longer stroke slower response ma ..

4B10 ... the piston travel from top to bottom (77.4mm) .. from bottom to top (77.4mm) = 154.8mm
4B11 .. 86mm (down) .. 86mm (up) = 172mm

each cycle .. 17.2mm more on 4B11 ..

at 1000 rpm ... 4B11 piston have to travel 17200 mm more than 4B10 ..

let says we doing 3000 rpm on 4B10 ...
3000 rotation per min ..
3000 / 60 = 50 rotation per second .. piston travel up and down 50 times per second ..
one rotation 154.8 mm ... x50 = 7740mm travel per second ..

so 1mm need how long to travel ??

1 / 7740 = 0.129mili second per mm

USE BACK THE SAME PISTON SPEED for 4B11 ..
7740 / 172mm (one cycle for 4B11) = 45 ...

same piston speed ... 4B11 only able to do 45 cycle per second ... that is ... 45 x 60 = 2700 rpm ..

TRYING TO CONFUSE those spy ...

Layman term .. 4B10 have better response than 4B11 .. but power of coz 4B11 more power

cheapjing rim for cheapjing guy like me

until i found a good and interesting 17", i will stick with this rim and my existing tyres

those who is interested to buy that ori 18" konig by enkei, it is sold to somebody name ALI

PHuuuii .. Dugong need to do alignment ???

eh .. no money buy Dugong .. dun kutuk Dugong okay .. Dey