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pulleys will reduce drain on the engine by underdriving the accesories (ie: a/c, alternator, etc). Thereby reserving more power to the drive train.

lightweight flywheels reduce wieght... less power to get a lighter flywheel spinning thereby quicker power to the wheels.
 

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hayaku said:
pulleys will reduce drain on the engine by underdriving the accesories (ie: a/c, alternator, etc). Thereby reserving more power to the drive train.

lightweight flywheels reduce wieght... less power to get a lighter flywheel spinning thereby quicker power to the wheels.
are they difficult to install ?:dunno:
 

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ROI-ndian
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Tommyboy said:
go with the flywheel. read this article by dinan and you probalby won't second guess about getting pulleys. http://www.dinanbmw.com/html/danger_of_power_pulleys.htm
just dont install the alternator or crank pulley i forgot which is considered teh harmonic whatever in our cars

but that is why Rogue engineering doesnt have one pulley included because of the bmw harmonic whatever steve dinan is talking about

check out the RE site and they will discuss this as the reason they didnt include that pulley in their set
 

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Tommyboy said:
go with the flywheel. read this article by dinan and you probalby won't second guess about getting pulleys. http://www.dinanbmw.com/html/danger_of_power_pulleys.htm
there has been no evidence to back up dinans claims. There is no documented situation where a bmw motor has blown up or broken because of a crank pulley. The point at which the harmonics will rip apart a motor are higher than the motor can rev. There is no danger in running a crank pulley as long as its not used in conjunction with a ltw fly.
 

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yeah...do both...but you'll certainly notice a difference in how much your car loves to rev more with a flywheel. That said, you'll probably not chirp your tires as hard when you shift as you would with the stock flywheel. And make SURE you get used to driving with a lightened flywheel....missing a shift can be disatrous with a light flywheel

A flywheel is one of those mods that has pro's and cons....yes, you will rev up higher but you will also drop revs faster and drop out of the powerband a bit quicker (--especially bad for an car with VTEC or VVTL-i)...the BMW's low end torque isn't the greatest in the world. That said, you'd really like the combo!

Oh..plus...i'd take the time to install a new clutch...the car will be apart anyway...it would save a TON of labor doing it now..plus you could install a stage 2 or 3 ACT/Centerforce/Clutchmasters/etc....so you could really launch well :)

Anyone agree/disagree?
 

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yes, I agree that if you're putting a flywheel on you might as well do a sport clutch and that driving with a lightened flywheel takes some getting used to. Just be aware that some have had issues with the car running like ass at idle with them.
 
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