Glenn Lawton
GSMmotorsports
#14 ITS RX7
NARRC ITS Champion 2012
NERRC ITS Champion 2013 12 11 10 09 08
NERRC STU Champion 2010
__________________
Glen, finally got to point ordered one and got it is about 3 3/4 " in Diameter vrs the single groove water pump pulley that was on before is about 5 1/8" so if I have theory correct the smaller dual pulley will turn the pimp faster?? We run a gutted thermostat with bypass plugged. I wonder if smaller pulley cause cavitation? Hope you and family are surviving the winter!
Tom Weaver: Logistics & Technical Support Manager IE truck driver for 1986 RX-7 ITS #63. "Diesel Haulin' Rotary" 2005 Dodge 2500 Quad Cab The Hemi has retired "Long Live the Hemi" Bill Weaver Driver- 2004 NYSRRC John Chave Award. 2006 & 2013 ITS NYSRRC Champion!. Truck Driver Named Glen Region Worker of the Year 2008.Located 45 miles southeast of Watkins Glen in Sayre PA.
You are slowing the water pump. With the required racing radiator for the RX7 that should not be a problem. You may, however, research the need for a thermostat.
Chuck Baader
White EP BMW M-Techniq
I may grow older, but I refuse to grow up!
If the water pump pulley is smaller, then it's making the pump turn faster.
Is that a pump pulley or an eccentric shaft pulley? And how does it use dual belts if they're not both replaced?
GA
Tom Weaver: Logistics & Technical Support Manager IE truck driver for 1986 RX-7 ITS #63. "Diesel Haulin' Rotary" 2005 Dodge 2500 Quad Cab The Hemi has retired "Long Live the Hemi" Bill Weaver Driver- 2004 NYSRRC John Chave Award. 2006 & 2013 ITS NYSRRC Champion!. Truck Driver Named Glen Region Worker of the Year 2008.Located 45 miles southeast of Watkins Glen in Sayre PA.
I had to remember why I sent you that link ...
We use the LARGER (ie slower) single pulley ... I think
I just found a dual pulley since you wanted to belt and
suspenders yourself by using two identical belts at the same time
I didn't know then, nor does Atkins list, the diameter of their double pulley
sorry!
Glenn Lawton
GSMmotorsports
#14 ITS RX7
NARRC ITS Champion 2012
NERRC ITS Champion 2013 12 11 10 09 08
NERRC STU Champion 2010
__________________
Went back and reread...my mistake. That is why various vendors sell a set...smaller crank, wp, and alt. BTW, pulleys are free, but it does not say you can change the number of belts
Chuck Baader
White EP BMW M-Techniq
I may grow older, but I refuse to grow up!
Meh, I think they're OK. "Alternate" pulleys are allowed (with no subsequent restriction to their design) and "type" of drive (toothed, v-belt, etc) has to remain the same. It doesn't run afoul of the "prohibited function" clause...
"If it says you can..."
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