Heatsoak issues.
#1
Heatsoak issues.
I have a mazda miata (1990) with an LS6/4L60E.
It's been pretty hot lately and after even mild spirited driving, I am getting boilover after I shut the engine off (3-4 minutes after engine is shut off).
I am wondering if maybe I have the fan relay wired incorrectly.
On a vette or a camaro, does the fan run after the engine is shut off?
I am using a Trans Am PCM. The fan power is tapped off the ignition power. Should it be tapped off of the battery?
Also, my intake air temperature is about 145 F at idle at 75F ambient in the evening. That seems awfully high. How does this compare with a Trans Am/Corvette/Camaro?
Thanks,
Sam
It's been pretty hot lately and after even mild spirited driving, I am getting boilover after I shut the engine off (3-4 minutes after engine is shut off).
I am wondering if maybe I have the fan relay wired incorrectly.
On a vette or a camaro, does the fan run after the engine is shut off?
I am using a Trans Am PCM. The fan power is tapped off the ignition power. Should it be tapped off of the battery?
Also, my intake air temperature is about 145 F at idle at 75F ambient in the evening. That seems awfully high. How does this compare with a Trans Am/Corvette/Camaro?
Thanks,
Sam
#2
TECH Senior Member
Fans are PCM managed so when motor is off so are the fans. You could put a thermo-controler on your setup to run after motor is off.
Are you runing enough coolant mix?
Are you runing enough coolant mix?
#4
Originally Posted by PREDATOR-Z
Fans are PCM managed so when motor is off so are the fans. You could put a thermo-controler on your setup to run after motor is off.
Are you runing enough coolant mix?
Are you runing enough coolant mix?
I am running about 30/70 mix for the summer.
Is it possible my themostat has gone bad?
What should the temperature hold at on most of these cars?
Sam.
#6
Originally Posted by white2001s10
Definately have your radiator cap checked.
Boilover usually means loss of pressure in the system.
Boilover usually means loss of pressure in the system.
Sam
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#8
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Originally Posted by samgm2
That was the first thing I replaced. I just replaced my thermostat. Hopefully that will resolve the problem.
Sam
Sam
#9
Originally Posted by white2001s10
maybe it's losing pressure somewhere else ...even a headgasket.
I think I will add some louvers to the hood to bring the underhood temps down. Its just too hot under there.
Thanks for all the advice.
Sam
#11
Originally Posted by PREDATOR-Z
Good, that thing must fly.
What is the Miata's weight?
What is the Miata's weight?
Weight numbers:
Front 1400 Pounds
Rear 1240 Pounds (Full tank of gas)
Total 2640
Weight distribution 53/47
As far as how well it moves, it moves reasonably well for a rear wheel drive car. I put a TCI streetfighter torque converter in (probably a mistake). I am not able to apply only about 50% throttle before lighting up the rear end.
Even so, with street tires (using a Gtech Accelerometer / Pro) It records about 0-60 in 4.7 seconds. (I am not a very good driver and simply haven't gotten very good at applying the right amount of throttle - too much and its all over with a pretty lousy time - too little and I am not pushing is as much as I can).
I have no idea what it will do in the quarter mile.
I am planning on going to the track next wednesday to find out.
Sam