When would you consider modding pulleys?

[NYCsubaruBRZ]

Originally Posted by mxsled

I have all of this bolt ons on my car actually...
oh wait you have a pulleys so youre now faster than a 350z

i guess your not tuned or maybe u suck at driving lol

u ppl love to hate.
there are many twins (with full bolt-ons and a proper tune) that make almost 200whp.

if you dont want to believe that pulleys and intake work then dont. more twin ass kicking for me.


your also on 18in rims so yea id deff see u in my rearview if we raced

im going to assume that a shop installed this stuff for you and you dont even change your own oil lol

[raven1231]

This thread is filled with so much bs...OP if you want advice I suggest you go to a different thread or at least go with the majority on this one.

[NYCsubaruBRZ]

damn i just cant prove shit on the internet. i need a drag strip. ill will get u a time slip when i bring the car to raceway park

[mxsled]

NYCsubaruBRZ:stop posting comments to prove how fast you car is... you're so childish

Originally Posted by raven1231

This thread is filled with so much bs...OP if you want advice I suggest you go to a different thread or at least go with the majority on this one.

agree!

[Gaiseric]

Just do a drop in filter.... header, tune, and exhaust.

[frsqc]

x2, Drop in filter, headers+tune, then downpipe / op.

[BRZPDX]

you can nickel and dime, spending about 2k for everything, or save that and go FI. This car feels x10 more alive with FI now. Especially if this is your 2nd car, if DD and only car, I would stick with AVO bolt on kit stage 1 only, or stay N/A.

[Captain Snooze]

Originally Posted by NYCsubaruBRZ

damn i just cant prove shit on the internet.

I shit therefore I prove.

[FRSure]

[Victor Draken]

Pulleys: waste of money

[Poodles]

Unless the pulleys are underdriving the accessories, they don't make power. Much like a lightweight flywheel or driveshaft, there's not actually any more torque or horsepower, though a dyno can show more simple because of how it loads up.


It's simple math really, but do what you want, it's your car I also would never run an undampened crank pulley as all internal combustion engines produce harmonics (yes, even the nicely balanced boxers and "perfectly" balanced I6).

[Captain Snooze]

Originally Posted by Poodles

Much like a lightweight flywheel or driveshaft, there's not actually any more torque or horsepower, though a dyno can show more simple because of how it loads up.

Ummmm... If you are using an inertia dyno then it will show an (small) increase. That is, the car is accelerating just that little bit quicker therefore is producing more power. Maybe that should be more net power. Won't make any difference if you are using a brake dyno. I appreciate the air/fuel charge and combustion process hasn't changed but the numbers on the (inertia) dyno say there has been an (slight) increase in power.

Originally Posted by Poodles

I also would never run an undampened crank pulley as all internal combustion engines produce harmonics

Yeah yeah. This has been done to death already. There are whole threads devoted to this.

[Poodles]

Originally Posted by Captain Snooze

Ummmm... If you are using an inertia dyno then it will show an (small) increase. That is, the car is accelerating just that little bit quicker therefore is producing more power. Maybe that should be more net power. Won't make any difference if you are using a brake dyno. I appreciate the air/fuel and combustion process hasn't changed but the numbers on the (inertia) dyno say there has been an (slight) increase in power.

Hence why inertia dynos have their issue One could also use lightweight wheels to get the same effect, or remove the rear rotors (I don't recommend it, but I remember this being tested somewhere).


As all power ratings are rated essentially on torque and horsepower is calculated from RPM, there's no "real" power gain.

Originally Posted by Captain Snooze

Yeah yeah. This has been done to death already. There are whole threads devoted to this.

Maybe so (and most everyone that makes them is going to say they're just fine as they're selling it), but it would be much cheaper for an OEM to NOT use a dampened pulley if there really wasn't an issue. This is much like the 1-piece driveshaft vs 2-piece driveshaft (read up on driveshaft critical speeds). It's not a NVH issue...


Regardless, it's a hell of a lot of money to spend on a part that's not making power or looking pretty...

[Captain Snooze]

Originally Posted by Poodles

As all power ratings are rated essentially on torque and horsepower is calculated from RPM, there's no "real" power gain.

I disagree.
Brake dynos measure torque and power is calculated.
Inertia dynos measure time and power is calculated.
Define real power gain. You drive onto a dyno. Get a reading. Go away and do some mods. Come back and do another dyno run (on the same dyno). If the increase is 10 power units can you tell me if I have increased the "real" power or the pretend power?