2 days ago I did the electric fan project (twin fans). I had to travel yesterday to some other city, the whole driving was highway driving, so no need for the fans (and I was so lazy to wire the fans to turn automatically).
To sum up, 300 Miles away from home (and in the middle of nowhere) I burned a module and I was lucky to have one in the trunk. And I replace the bad module. Then the ride started to overheat and I couldn't do anything. I turned on both fans... no use.
Returning home the temp gauge showed 230 and steam was getting outta radiator.
The engine now starts, works and seems good, and as ever but I have lost %50 of the power!
I checked the OIL and coolant, no milky oil or no oily water to suspect about blown head gasket.
I am really confused... the engine idles perfectly.... but where are the horses?
any idea?

That definitely sounds strange. I wouldn't think 230 would do any damage, but if the engine is really down on power maybe it did. I would try to get a compression tester and check the compression in each cylinder. I believe its possible to wipe out a head gasket in between the cylinders without leaking any coolant.

Cruising at highway speeds should not be putting a lot of strain on your cooling system unless you are driving up a lot of steep grades. Either way it is time to go through the system and find out where the problem is. Might be time for a bigger radiator if you have made some improvements to the engine.

Hey I just realized you said the overheating started after "buring a module" - what module are you referring to? The ignition module in the distributor? If so possibly the cause for both the power loss and the overheating is bad spark timing?

Sounds like maybe your "spare" module was/is bad OR that something else in the ignition might have killed the first module and left your spare one hanging on by the skin of it's teeth.

Other possiblility with an overheat situation, other than the usual stuff like blown head gaskets and cracked heads, is that something might have CAUSED it to overheat- like a timing chain skipping a tooth, or possibly, you bumped the distributor's timing accidentally while replacing the module.

When you change a part and suddenly it runs completely differently ALWAYS go back to the area of change first, before checking out other non-related systems.

thanks, I will recheck the ignition module and timing, but confusing point is that the idle quality is flawless and even no hesitation upon off idle!
I will come back as soon as I check the module.

I AM AN IDIOT!!!
I took a look at the engine: I opened the HEI. While trying to fasten those 2 screws in the dist... The weight was stucked there and the engine was out of mechanical advance all the way back home.
That made the engine half horsed and, since I had to push the pedal more... the ride was overheating...
OH GOD:whine:
Now I underestand how enough advance can make the ride more fast... and retardness kills the engine!!!

retardness kills the engine!!!

aint that the truth :crazy: