InTheBenz0

Well I am stock right now but am going to add a pulley and tune to my SL55.

The SL55 has decent cooling, and I am keeping the stock heat exchanger, and adding a supplemental one -- so hoping cooling isn't an issue. Those with SL55s can chime in, but all 55ks can also.

I would like to know how many of you have what size pulley. I know for a while 172 was the largest, then 175s came, and now 180s.. and in fact many places who use to sell the 175s/172s only sell the 180s now..

I am just a bit worried with the 180mm that I may have reliability and/or overheating issues. Car won't see much track time if any.. but I do drive spiritedly on the road. If by adding the supplementary h/e and -10* in star, along with having the SL55 stock h/e I won't have any issues with anything, then I am all for going for the largest pulley (the 180mm)


So I am curious for those who are pullied, lets see what MM is the most common, and if you had any issues with your size, or switched your size (for bigger or smaller)

zoink

As some tuners say, 168 typically doesn't require cooling upgrade. I've pushed the car numerous times and as most recently 3 dyno pulls in 95-100*, no indication of S/C shutting off. Just as a side note, my pump was replaced about 1.5 years ago.... still OEM bosch. Not sure whether it matters.