Ok guys, I finally got my Vortech kit installed (thanks to Jeremy for selling it to me) and I love it. There is so much pull now it feels endless. I have the 3.33 pulley and I read that the 3.12 pulley is where its at. Is there really that much of difference between the two pulleys? Thanks guys!!!

P.S. I didnt realize how loud it would make my car!!!!

 

rougly 40whp/30tq

 

so basically you are saying im going to feel a difference when i drive the car with the horsepower/torque gain?

 

u'll feel a difference but it wont be 40whp... more like 20 max

 

so is it definately worth getting or should i save my money for the 2.87 and cruise the 3.33 for a while?

 

i went from 335 to 376 or something to that affect and 300 tq to 330 tq

...but then I also switched to the EU and changed a couple other minor things

to the OP, yes you will feel it...2.87 is great but has belt slipping issues...search and you shall receive

 

thanks i appreciate it!!

 

Going from the 3.33 to the 3.12 appox 15-20whp. From the 3.12 to 2.87 appox 15-20whp. So the difference between the 3.33 and the 2.87 is appox 30-40whp. Of course it all depends on what other mods you have and your tune also, which is very important.

 

It all depends on how aggressvie or conservative your tune is. I have a 3.12 setup and only make 350 rwhp and 320 ft/lb, while alot of other guys are making 20 to 30 rwhp more with the same setup. I only gained 10 rwhp and 10 ft/lbs more at the peak when I switched pullies. What's important is the area under the curve. The biggest difference between the two pullies is how much faster the 3.12 builds boost than the 3.33. More boost equals more power alot sooner in the rev band even if both setups yielded the same peak numbers. I'm at 1 psi as little as 2200 rpm with the 3.12 and 8 psi at 6k.

 

There is much more to it than just the tune when going from one pulley to the next .

1- plenum mods
2-stock cats , HF cats , or no cats
3-exhuast used
4- AT5 or MT6
5- every car is different
6- dyno used

There is a thread over a My350 that a guy with a APS kit on and showed two dyno's . One on a DynoDynamic of 450whp and the same car and tune on a SOCAL DynoJet of 545whp . SO you could dyno on that DD dyno , but then put on a smaller pulley and run to this high reading dynojet [ like a few people on here have ] and then get a huge number . WHich would make it look like you gain a huge amount from the pulley and tuning alone . One tuner isnt going to find or gain much more than a couple whp over the next tuner.

 

kinda off topic, approx. how much was your installation if you have installed the pulleys? anyone?

 

Most of us do our own pulley installs.

Booger, I think we're talking about how much of a difference would a pulley swap make. Of course, other mods will make a difference, but the tune is very important. A stock Vortech makes 330 rwhp with a conservative tune, but with an aggresive tune and no other mods the same car can make 365 rwhp on the same dyno just from the tune.

 

i see, so it's not a hard install. I thought pulley is PITA to install? or is it crank pulley?

 

Just going off of the OP post and replies made about changing pullies . Didnt think I was off topic at all .

Your car was last tuned in Chicago and maybe a conservitive tune there . But you could put it on a dynojet dyno in SOCAL and it could come out 410whp with out a new tune at all

 

My main point is ...we do see some huge gains from going from one pulley down to the next . Some of thoughs huge gains where going from one dyno to the next . So some people get the wrong idea about how much is really gained . Most of the time with nothing else changed a 10 to 15whp gain is normal for each 1 psi in boost gained .