lightweight crank pulley-d14/d16

[007]

here are a few old videos of the engine revving in idle with the Fidanza and lightweight pulley [0.8 kg pulley vs 3.5 kg stock]:

http://www.youtube.com/watch?v=52RgyRfb8-g
http://www.youtube.com/watch?v=Cv3uPKkVRQA
http://www.youtube.com/watch?v=lbewGF8XfTA

the revs do drop slightly quicker but I just shift quicker to compensate. other than that, I felt an *increase* in wheel torque and not a decrease as several people keep saying. the reason being that a lesser proportion of torque is needed to accelerate the flywheel and hence more of it is available at the wheels.

here are a couple of VBox plots before and after the pulley and fluwheel change.

before: http://www.d-series.org/forums/attachme ... 0_vbox.jpg

after: http://gearheads.in/attachment.php?atta ... 1314548721

[saxophonias]

wow! Astonished! It revs like a motorcycle
Is it mainly due to the pulley or the flywheel?

[007]

I cant say one thing specifically. I would guess it is a combination of the pulley, flywheel and the short stroke of the 1.3.
flywheel would definitely contribute ore than the pulley though. it accounted for approximately 6 kg decrease in weight while the pulley accounted for 2.5.

my current setup with the VTEC head isnt tuned properly yet. once it is, I will see how that revs with the stock pulley.

[sktaroins]

the crank pulley should better function if its made to handle higher pressure.
Lets say your crank pulley is at 150mm diameter .
For higher boost :-
Make a small , but bigger change to the diameter .
Acoording to the right change in size for the right model for ur car.

It can be leighter than but bigger than the one you have.
For example:-
175mm will give you higher boost by 14 PSI.
If ur engine has a much larger intercooler, you will not see high boost pressure , only much more power .
You will need to get a longer supercharger belt.
Move the factory pointer outward
Run a smaller idler pulley.
The tunning belt alternator pulley works decently when flipped around backwards and shimmer out a tad.
The lieght weight pulley should be lighter by 30% from the factory pulley.

But you need to ne careful what you buy.

[armyej9]

i reckon, if its a well made and balanced pulley.
there should not be a problem with vibrations.
there is even a OEM one for b-series the N1 enduro pulley.
i love to try a lightweight pulley on my d14 soon.