Re: Im running a little hot now w fmic, Anyone have experience w this problem?
interesting reading this thread.
Since having a few sealing problems and a few other gremlins getting n the way of my playtime this year i thought i would take the extra time to do some testing before going back to the track.
using
ford taurus fan
no thermostat
electric water pump 55gpm rating
using straight water no additives
3 or 4 inch front mount intercooler (this is important in this test from what i read in the above thread)
wiring and relays were 2 years old
wiring was 10 gauge and relays were 40 amp rated from directed electronics. (realy was getting hot.
I recall this fan being rated at 40 amps from posts on this bbs. ( think its higher !)
large male & female spade connectors between relay and fan to enable disconnect plugin to r&r radiator. these got hot when running!
starting from ambient 70-80 degrees
took 18 minutes to go from ambient to 185
the changes:
changed relay to 200 amp relay -solenoid
power input to new relay, 2 gauge from 12 v+ junction block i allready had in use. (thats a big wire)
output from new big 200 amp relay to fan same 10 gauge size but now without spade terminals. all connections are now bolted at relay.
the old 40 amp relay would get warm and the old spade connections would get hot also.
power to 75 amp water pump relay used to be 10 gauge abut now the 2 gauge connection on the relay solenoid now provides constant 12v+ to 86 and 87 on water pump relay. output to water pump relay is on 30. relay switches ground on 85.
the test w/ wiring changes using existing ford taurus fan.
now took 36 minutes to go from ambient to 185 degrees.
Guess this just doubled the effiency of the cooling system.
btw it now takes about 10 minutes to reach 160 and about 2 degrees per minute increase after that.
so anyway went from ambeint to 185 degrees in 18 minutes to
185 degrees in 36 minutes.
both tests was idleing at 1300 rpm.
So after getting really anal aabout getting some baseline numbers on my cooling situation I think anyone reading this can take his cooling problem and kick in in the ass now and go out and idle in traffic w/ or without air using an electric fan if they do it right!
fwiw i was going to see if the temp would go higher than 185 degrees but I figured after 36 minutes i had beaten the problem and the solution was at hand.
besides i wanted to inspect the oil filter before i went home. ( it was clean) as this made exaclty 1 hour total time on new bearings. ( remember i said i had a sealing problem above
)
Guess i should add that the test above had the motor running prior to setting timing which can affect temps. Hey i just turned the distributor enough to get it to fire and kept on with what i was doing. Didn't care how it ran so long as it did.
time to check the atco schedule.
ed
