ASP pulley is on, runs hotter
Thread Starter
Staging Lane
Joined: May 2003
Posts: 55
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From: Where the green grass grows
ASP pulley is on, runs hotter Anyone else's car run hotter after they installed the asp crank pulley? Its not overheating or past 210 but is still running hotter maybe 10-15*? Think i am losing any performance from that and a 160 or 180 stat will gain me anything? My fans have been set to 160 for a long time now but still the stock t-stat in there. What do ou guys think? 
TECH Fanatic
Joined: Jan 2002
Posts: 1,566
Likes: 0
From: pa
Re: ASP pulley is on, runs hotter the asp pulley shouldn't make any difference in cooling.
Did you get a shorter belt? the asp is smaller than stock and possibly your belt isn't short enough? thus causing the water pump to not cool properly?
Did you get a shorter belt? the asp is smaller than stock and possibly your belt isn't short enough? thus causing the water pump to not cool properly?
Re: ASP pulley is on, runs hotter Well, the underdrive pulley reduces pump volume
at a given head pressure. The head pressure (pre-
pulley) is whatever it needs to be, to make the
thermostat "setpoint" (not a very sharp transfer
function, there). Now to have the same net heat
removal (with a cold-enough-not-to-matter
radiator tank) you need the same coolant flow, but
you don't have that. To regain flow, the
thermostat will have to open slightly more
(presuming it's in charge of things). For that
to happen, the temperature needs to be higher.
How much? Dunno. But some bit for sure.
Then again, it's summer too. Do you have any
ECT readings before & after? Be interesting to
put numbers to it. My gut, from looking at easy
and hard running, makes me thing it shouldn't move
more than 3-5 degrees but that's just what my
ECT range is.
at a given head pressure. The head pressure (pre-
pulley) is whatever it needs to be, to make the
thermostat "setpoint" (not a very sharp transfer
function, there). Now to have the same net heat
removal (with a cold-enough-not-to-matter
radiator tank) you need the same coolant flow, but
you don't have that. To regain flow, the
thermostat will have to open slightly more
(presuming it's in charge of things). For that
to happen, the temperature needs to be higher.
How much? Dunno. But some bit for sure.
Then again, it's summer too. Do you have any
ECT readings before & after? Be interesting to
put numbers to it. My gut, from looking at easy
and hard running, makes me thing it shouldn't move
more than 3-5 degrees but that's just what my
ECT range is.
