Lightweight flywheel, and how it relates to IACV duty cycle.

[shiroitenshi]

well, I'm sure some of us has gotten lightweight flywheel and used it, only to find that when braking, the car stalls as the RPM drops below idle.

Some people tried adjusting the idle screw, idling at higher revs, but to no avail.

So what's the trick?

For note to the tuners, it's the IACV duty cycle. Free rev and let it drop.. if you engine dies, increase duty cycle one point at a time. You will notice the revs drops slower each time.

When you get it right, you car will not drop it's revs to the point the engine stalls.

Just thought it might be something of note, since I do notice that some people have this issue with lightweight flywheels.

 

[simplycomplexed]

yay... shiro's lecture time... :D

 

[UKDMEK4]

i saw my mechanic installed a lighten flywheel (4.1kg+) to a b16.once started, idling was not smooth, rpm drop n engine dead if x keep on revving. the owner ask the mech to adjust what not. the mechanic said, let it be.. it should be ok once u drive around
after a few round circling the area.. the idle came back to normal (when using stock flywheel) : S

 

[shiroitenshi]

i saw my mechanic installed a lighten flywheel (4.1kg+) to a b16.once started, idling was not smooth, rpm drop n engine dead if x keep on revving. the owner ask the mech to adjust what not. the mechanic said, let it be.. it should be ok once u drive around
after a few round circling the area.. the idle came back to normal (when using stock flywheel) : S

Heh.. the IACV helps slow down the rev drop, so you can use lightweight flywheels.. it functions like an idle screw, except it does it on the fly while the car is moving

The duty cycle helps prevent the revs from dropping to fast. There is a limit though, as too light the IACV cannot compensate.

 

[2nd2none]

Mr.Shiro,

May i know how do u go about of doin' that?

 

[hattech-v]

inside the management/chip :)

 

[JINEIL2EN]

well, I'm sure some of us has gotten lightweight flywheel and used it, only to find that when braking, the car stalls as the RPM drops below idle.

So what's the trick?

heel & toe will do a great job....ahahaha

 

[shiroitenshi]

Heel and toe in the housing area kena marah by neighbours loh.. :P

 

[JINEIL2EN]

Heel and toe in the housing area kena marah by neighbours loh.. :P

thats why u need a Mugen Twin Loop or Spoon Street Type Muffler...

Mie's car need no heel/toe oso kena marah 1....

 

[shiroitenshi]

Ha Ha.. no comment on that one :P

 

[JINEIL2EN]

Ha Ha.. no comment on that one :P

i am sure u know that too....ahahaha....Avantech ma....

 

[c00lric]

Hi there,

Does having the aircon turn on will affect the rev drops 2 fast n dropped till below 500rpm with lighten flywheel installed?

 

[shiroitenshi]

possibly, or it could be a dirty/stuck/problematic IACV.

 

[deathzone]

Bro, pinjam ur thread...anybody experiance weird noice after install light weight flywheel?
After i install toda flywheel my car got some weird noice when start up and rev pass 3k also got that weird noice....my mec told me is bcos of the steel flywheel. Is my car normal???