318 LA Engine Hot=Noise Dist.

LowDart said

Why you think i can upgrade the problem?Yes ,i want to make a Ignition upgrade because this box has a low RPM limit.MAX -4.500 or 5.000rpm's i think.

Click to expand...

A stock 318 has a low RPM limit too (you didn't mention intake, camshaft or exhaust mods). The stock Mopar ignition control unit isnt all that bad, and if you are running the Mopar Performance silver ECU and blaster coil, you have plenty of RPM potential.

I made the "fix it first" comment in response to your diagnosis of the car. You stated that you have arcing (not arching, an ARCH is an inverted parabola, while an ARC is an electrical discharge between conductors through space). This means that your coil is already producing more power than your cap/rotor/wires can transmit to the spark plugs. You identified a defective component and then spoke of replacing something else. This would be like putting a new roof on a house with rotten walls. Also, your first question was about noise possibly from the distributor. Again, why replace a perfectly good ignition ECU if the distributor needs a couple drops of oil? OR, if the distributor isn't the cause of the noise, finding and fixing the source of the noise should be a priority. If your rear cam bearing has seized, or you distributor drive grear is shredding itself, you need to fix that first.

Here's what I would do:
1) New distributor cap, rotor and plug wires. Plugs too if they are not new.
2) Remove distributor and make sure the shaft spins freely. Turn the dist upside down and place a few drops of oil on the shaft so the oil goes into the bushing. A shot of WD-40 under the advance plate on the weights wouldn't be a bad idea either.
3) Put it back together and see if the noise is still there. If so, you can be pretty sure it isn't the distributor.