Manifold has several critical dimension. The exit diameter, the length, and the exit taper angle.

From what I know, exit diameter should be slightly bigger than exhaust port size and maintain the same diameter for a certain length, before the manifold tapers outward like a cone shape. This cone shape will create a suction force into the manifold straight area drawing exhaust gas out. That's why some engine can see fire burn at exhaust end, coz the suction + timing overlap draw AF mixture into the exhaust chamber... and then there is Powerbomb.

like those on those custom pipe for superbike and drag car... KABOOOMMMMMMMM

powerbomb is it gd 4 the bike itself.

hi all..
my new LC just hit da odo at 6ookm..
just bawak 80-90km/j(penat giler)..
sumone said to me,new moto should be ride at 60-70km/j..
but i need to go back n forth at Banting--->KL--->Puncak Alam...
klu bwak 60-70 lmbat la smpai..
klu bwak 80-90 nanti engine ade problem ka?

hey any of u did this....what we so called the SINGH GROOVE at your HEAD?...

http://www.mgccars.com/groove_101.htm

http://www.youtube.com/watch?v=Ss7slCT0Vpw

i had read in yamahaT135 forum..the philiphines and indon are doing this to their engine..

This post has been edited by sangtupperware: Nov 12 2010, 02:13 AM

so sorry bro..whats is singh groove at ur head?

This post has been edited by sangtupperware: Nov 12 2010, 02:20 AM

orite jer...no problem

when i get my bike this is what i done..
riding no more than 100kmh..
but there's an emergency one day then i had to pull up to 100-120kmh!
then i tink, ppl said new bike need to be ride not more than 80kmh.. this include LC meter oso?
coz if LC meter 80kmh the actual speed just 60+ to 70kmh i tink.. meaning when i ride at 100-120 the actual speed just 80-100kmh..

No one tried it here. Interesting subject. Have you tried it? Sayang wanna saw on my engine head though.

This is a different school of thoughts regarding compression/squish area inside the combustion zone - It's about creating turbulence within the block, instead of getting a good AF mixture before it enters the block.

Years back, there was another guy, from India too, I think, who created pits and dents (randomly) on the piston surface and squish area, which improved fuel economy. Since he had no money, it ended up just as another story on the internet - urban legend.

Turbulence and fuel atomization is important for carburated engine, less a problem for FI engines.

bro i think its the same guy....u can find out more on youtube..i lazy to put here

I've tried the singh groove on the previous 60mm block and piston, got a bit of power increase, too bad end up water coolant masuk engine

oh yeah, now you mention in...

no worries..
can go up to 100kmh actually..
my first day i get my bike already ride to 100-140kmh..
no problem bro..
just keep maintain the EO and check ur radiator always..

ayooo...so this technic is not good de? or maybe faulty installation?...

This post has been edited by sangtupperware: Nov 12 2010, 01:25 PM

if i recall correctly, singh groove original initiative is to increase the torque when the engine compression is increased, so that the car can drive at relatively low rpm to save fuel consumption. I wonder if mr singh validate his innovative idea when the engine revs up to 10k rpm.

My ride guys..

seriously?
only 1month plus u already mod kaw2

This post has been edited by anep: Nov 12 2010, 03:48 PM

I think is around rm600 lah, thats why the tauke told me.
Cause have to change block & piston lah, cam lah, do porting lah, bla bla bla...
Aaron do you still remember the link to hard break in or not? I think my bike need to do hard break in liao

I am already using BH eh pipe liao, about 2 months ago, but manifold still stock, hehe...
Nvm lah i think i will stick with stock manifold first, if not satisfy only change to custom one...
You can try BH pipe lah, not bad ma, sound not so loud also...

Nice bike. Wah so fast mod your bike liao

This post has been edited by UncleCheang: Nov 12 2010, 04:03 PM

Oo gua forgot jor u already using BH pipe... I think u stick with the stock manifold ba, cuz last time when we met Daniel (charge's sifu ) He said calvin's bike release too much gas from exhaust d so I think u can keep ur manifold stock enuf... Ei charge y u did ur singh groove at piston and not at the head leh??? The concept is the same one is it??? I remember u make a ''X'' mark on ur piston right??? Ei guys I saw a new LC tail light recently!!! The shape looks like stock one but the background is like crystal style just like the one 125zr using...

This post has been edited by bizzy123: Nov 12 2010, 04:43 PM