I ma looking to get my pulley from eyrocharged , but i just want to know differences 172mm or 180mm , i want to know you get different HP? Which one do you guys suggest me to get ,which one is more prove it on m113 engins? Thanks

if u r getting cooling mods, then go for 180mm. u cant be wrong, but really depends on your driving style.

differnce in hp will be about 20 - 25 on wheels.

Do the 180 if you have headers and no cats,You wont even see 15whp difference from the 180 enless you have cooling and headers/TB

you can make the same power with a 172 on stock car with decent tune.

There was a CLS55 that made 72rwhp off of a 172 pulley & tune that was the highest I have ever seen.

Vinny made like 540 or 560 whp with a 168 and ran 11.0 at like 126

What are the 180's making?

With perfect tune,proper cooling and perfect dyno day on average anywhere between 40-60hp and the torque will about the same if not more 40-60ft+ someone correct me if I'm wrong. That is based on just a 180mm,ECU and good weather

i have a 172 and I'm upgrading to the 180 with headers, I already have cooling. I just hope I don't get slower...Ill report back as soon as I can

how are you running with the 172 now?

11.7, 116, 1.7 60' needs an updated tune

What did you run when you were stock?

It was before I really knew how to drive the car, but it was like a 12.6, 113, 2.2 60'

so it would be safe to assume that you picked up 3-5tenths and 3mph by adding pulley

absolutely I would assume that. I can run an 11.9 frist trip down the track in any weather..

11.7 is my fastest pass out of about 15 runs..116 is my slowest trap with the quickest 1/4. I can run 11.9 at 118. depending on weather and 60' I know a little confusing stuff. I feel that I could easily run 11.5 with the right 60' cold motor and good air.

cool thx for the info, later on this year I will see which direction I will head.