Join Date: Aug 2010
Location: Freakin' cornfields
iTrader: 1 reviews
Update to the hesitation suggestion. I was reading through the LaSota tuning book and noticed a section on Cobra hesitation. He recommended two things before doing the PPRV delete:
1.) Change maximum MAP counts to 1023.
2.) Change the maximum fuel pressure clip to base pressure + maximum boost + margin. If you're running a 2.76 pulley/15psi, that would be 39+15+10 = 64psi.
On to the cooling section. I changed a lot of routing, ensured I had properly routed vent hoses, a downflow radiator helped a lot, relocated the thermostat, and did the correct fill procedure. I also welded a large nut to the crossover plug to make it easier to open, because it can be a bitch with that 1/4" square drive to get enough torque.
For the most part, it comes down to fill procedure. Do as the Ford manual says. Park it with the nose slightly up. Open both the crossover and surge tank. Fill from the crossover nice and slow until you get to the full line on the surge tank. Close the surge tank. Continue filling until it comes up to the crossover.
Now here's where I deviate. The manual says to stick a long funnel in the crossover and keep some liquid in there for when it drops. I've tried that and you know what happens? As soon as it warms up, the pressure is too high and the coolant rises. You could make it work if you had a column of coolant that was tall enough and a funnel that was wide enough to slow it down. Mine deaerates so well I just close the crossover, run it until it gets warm (heater on full blast), shut it off, let it cool down, and then top it off, and I'm good to go. With the stock configuration that may take a few times. If you've got the stock setup, get one of those big ass fill/dearation funnels and give it a try that way.
With the thermostat my biggest gripe was that it didn't open when it should because it was located down low. The engine was getting up around 225 deg F before it was cracking open. Low mount thermostats are better for a steady coolant in temperature, especially for aluminum blocks, but it doesn't control temperature as well based on coolant outlet. But that's another discussion altogether.