I’ve got a very mildly worked 89 GT with AOD. Car is running a Vortec supercharger making 350 to the wheels. Couldn’t stand getting beat by Camry’s
So, here’s the problem and why the car has been in the shop for months. My mechanic is at his wits end and is running out of things to try/replace. Car runs perfectly but after a while starts to overheat. So, in an effort to fix this, we have done the following - external trans cooler so radiator doesn’t have that job, custom ducting so all air goes through radiator, custom Griffin radiator with Spaal electric fan. We have tried 4 different brand water pumps and every temp range thermostat. The engine has been flushed multiple times.
Here is our best case at present- with a 195 thermostat, it seems to hold temp. Until... we put it through 2 run cycles, shutting if off in between. At the beginning of the 3rd cycle, it starts normally and then within a minute the temp gauge flashes like you threw a switch and the radiator cap starts to boil over. We are at at total loss what to do from here and are begging for any help with ideas we haven’t already thought of.
Some final thoughts - machanic is is world class NMRA builder, he also built a car just like mine that has no issues. Please HELP. thanks
So, here’s the problem and why the car has been in the shop for months. My mechanic is at his wits end and is running out of things to try/replace. Car runs perfectly but after a while starts to overheat. So, in an effort to fix this, we have done the following - external trans cooler so radiator doesn’t have that job, custom ducting so all air goes through radiator, custom Griffin radiator with Spaal electric fan. We have tried 4 different brand water pumps and every temp range thermostat. The engine has been flushed multiple times.
Here is our best case at present- with a 195 thermostat, it seems to hold temp. Until... we put it through 2 run cycles, shutting if off in between. At the beginning of the 3rd cycle, it starts normally and then within a minute the temp gauge flashes like you threw a switch and the radiator cap starts to boil over. We are at at total loss what to do from here and are begging for any help with ideas we haven’t already thought of.
Some final thoughts - machanic is is world class NMRA builder, he also built a car just like mine that has no issues. Please HELP. thanks