Simple,You are undercharging a car with a ton of accessories and slowing coolant flow to a car that already has issues cooling the drivers side head . You may not see adverse effects immediately but you will cause premature failure to accessories and engine.I felt safe with a 3% underdrive harmonic balancer and that's as far as I will go.Driller I bought a set of pulleys last year that I plan on installing soon.It came with the crank,alt,and water pump pulleys.Since the crank pulley is smaller and the other two are larger you use the same belt.Why do you not recommend using the alt and water pump pulleys?I know they will run a little slower but I too have changed to a 373 gear.
HMMM I don’t know. On my Mark VIII the Steeda 3pc has been a nice and worthwhile upgrade (you’ve seen it when ive driven it out of state to Carlisle).Maybe I was doing it wrong?
I only had the Steeda crank pulley since I also had the Meziere electric water pump and had a heck of a time managing the alternator. Too big of a pulley and there was definite charging issues at idle. Too small of a pulley and there was issues with over-spinning the alternator at high revs.
Good luckI just left the shop and discussed the concerns brought up here. They don't anticipate problems. They are looking to put Cobra posi with the 3.73 gears and tune the trans. We axed the open cold air system as they thought the original design is max.
You'll like this combination. I'm sure of it..I am most excited about the rear end rebuild. 3.73 and hopefully tracloc.
Get out there and get your cruise on! I can just about see the light at the end of the tunnel here in MN. Snow is melting, and my car wants to come out to play too.If anyone is in Carlisle this weekend you may see me cruising!