416 stroker temp?

northeastmopar said
Well, IT IS ALL FIXED. Friggin 180 degree thermostat was stuck and only partially open. Almost no flow through the radiator. I did a thermal check and top hose read 160 while the bottom hose read 90 degrees. Drained some fluid, pulled the gooseneck, removed that piece of made in china or mexico crap, installed a new gasket with NO thermostat, looked in the radiator and there she blows. Lots of flow. Running at 180 now. Thanks for all the help guys. Just wanted to update you. I did pull and checked my dyno sheet. Air to fuel rarion was at about 12.8 from idle all the way to 5300 RPM which is where she is making peak horsepower. She is running a little rich. Holley said it may be just a need to change the power valve from the 6.5 that the carb came with to maybe a 5.0. He said it may just be loading up at idle because it runs the balls on the highway. I did install and check my vacuum at idle and it was a steady 10.2 inches of vacuum. Holley said the power valve should be at about half that number.

Before you change the power valve, and go the wrong way, go to the fuel and air systems forum and read the thread about power valve timing. It's worth it. I'll even go bump it to the top.

Your phone call to Holley was a colossal waste of time if he actually told you to make the power valve open later. That tells me the idiot doesn't even understand how that carb works.

The short of it is this: you set your cruise A/F ratio with the main jets. You set your WOT A/F ratio with the size of the holes in the metering block behind the power valve. Don't know what carb you have, but most have a fixed hole. You can drill and tap that hole and use 6/32 brass set screws to adjust the size of the hole.

The dude at Holley is wrong. You set your power valve opening 2, maybe 3 numbers under CRUISE vacuum. For example, my engine has 15 inches of vacuum at cruise. I have a 10.5 power valve. I'd love to have a 12.5 power valve but I can't find one.

FYI, my idle vacuum is 9 inches.

Go read that thread. As I said, you are an rich. Ha said, you can be dead inch and still have an acceptable A/F ratio. Let the plugs be your guide.