Just curious more than anything, have both the standard (two groove main pulley, single groove waterpump pulley) and HD cooling (three groove main pulley and two groove waterpump pulley) systems here for my 455. One uses the short waterpump and one the long. Car does not have a/c, but its pretty obvious the regular cooling won't drive the waterpump as much as the HD cooling option since the main pulley is smaller (waterpumps are the same). Thing is, don't like having that unused groove on the HD system... So I assume either one will work fine on a 10-1 squeeze 455?? Anyone have any real world experience?? Any issues running a clutch fan setup with the short pump? Thanks Tim
I've run both sets, tried out on a 71 and 76 455. On the 71, the 2-groove didn't fit so well on the short waterpump so I ran the 2-groove main and the 1-groove waterpump. On the 76 long pump either was OK and being a paranoid freak I simply ran a second belt (One waterpump-PS pump, one waterpump-alternator)
Tim... Is that for your 71 stage 1? Assuming so, all stage 1's got HD cooling which used the a/c pulleys and a/c pump (even when the car did NOT have a/c).:beer You can also check the asm manual, it shows it (I also checked with Duane a while back).:bglasses:
Hi Dan, no my Stage 1 has the proper pulleys and has a/c anyway so everything gets used. This is for my ragtop....just thought it would look "cleaner" with the one groove waterpump pulley....this one is destined for some shows, people don't care whats correct, they only care for what looks good and seems silly to have that extra groove out there doing nothing.... Just wondering if it will cool well enough as the driving pulley is smaller than with the HD cooling... Or did you want to buy it???:grin: later Tim
