my 302 had to be bored 60 over and im afraid of it over heating when it is installed and running. what radiator and electric fan would you guys recomend i use, would the jegs universal aluminum radiator work?:confused:
I have the Jeg's radiator and a later model Escort fan. (Same as the Taurus fan but single-speed motor and slimmer shroud) It's on a Hayden thermostatic controller. It has done a great job, although since I've put an AC condenser in front of it I've run as high as 225 when it's 95 degrees outside in traffic. It was stable though, and it went back down as soon as I got some wind through it. I have a small condenser fan on the way and I think that will solve it.
Do you know how many amps that fan pulls? I would like to try that, but I've only got a 60A alternator. Thanks
I also have a 60a alternator. I need to upgrade it, but it gets me by. When I'm not running the headlights and the AC the alternator keeps up fine. When I am, the alternator is not keeping up at idle, but at cruise it does. I don't know how much of that is the fan's fault though. I have H4 halogen headlights, taillights with more bulbs than stock, MSD, AC, stereo with an amp... I haven't measured the current on the fan, but I know this much... I have a 50 amp circuit breaker on it and that never trips. I used to have a 30a fuse on it and I blew that a couple of times. So the answer is: Usually less then 30 amps. Occasionally more than 30, but never more than 50.
that fan has a inital start up spike of about 50 amps. after the first instant of starting the fan the amp load drops to around 20 amps. your stock alt should be able to handle the tauras/escort fan.
I hate to say this but you may have bored it out too much. A 302 is not recommended to go more than .040 over because of this problem. I hope you can fix it by using a larger radiator. If not you may have to find another block.
theres a thread on clasicbroncos.com the i skimmed through and the user that have had it bored out were able to keep it cool and had no major problems. im going to get all the specs on the motor before i pay for it so if it burns up i will take it back to him http://classicbroncos.com/forums/showthread.php?t=96048
What year block is it? an older block would be a better candidate for 60 over,it will be hard to keep cool no matter what you do and there is not much cylinder wall left
today a guy at the autoparts store told me that i could run my 302 without a thermostat to help keep it cool. how true is this?
That is BS. Don't do it. Consider this: Run an oil cooler. Use manifold vacuum advance to run cooler at idle. Ensure you are using a proper fan shroud. People bore 302s 60 over all time. You will be fine.
Hell no, you will stay much cooler WITH a thermostat then you will without. You will overheat at the drop of a hat if you get caught in stop and got traffic without a thermostat. The purpose of the thermostat is that it opens and closes as the engine heats and cools to allow the coolant in the radiator time to cool down before it opens back up and lets it flow through the hot block and get heated back up again.
