408, Small or Big Block? Need EGT Info
Rob is correct..EGT readings are pretty much worthless, and completely worthless when the engine isnt under load.
You would need to have the motor on an engine dyno or chassis dyno to get any temp reading that would be of tuning value.
At idle, temps are going to be all over the map off the carb idle circuits. You aren't going to get any data at all worth looking at.
Sometimes... hearing what you seem to not want to hear...isn't a bad thing... your barking up the wrong tree with that EGT probe
Thank you for your reply. Sometimes people say things in a way that rubs me wrong and I can't understand what they are trying to say. But!! I am NOT trying to tune the engine to the EGT gauge. Like I said earlier, I am making modifications to the engine and need to see if the engine runs any hotter with the mods or not. I am not trying to tune my engine, I have it tuned rather well. What I am doing is, and I hate to say it because everyone things anyone who tries to vaporize fuel is a nut, but I am vaporizing fuel. Rather well. I need to make sure that the engine temps are within normal range at cruise, then under acceleration in steps so I don't burn up my motor on the floor on the dyno. It "is" unlikely that I will be vaporizing fuel so well that under acceleration it would burn up, but cruising at 70mph, I probably could. I have to adjust the A/F ratio at the carb via jetting, acc pumps, cams and shooters, to adjust the carb for the modification, but it super helps to know the normal EGT Range, as stated below. I apologize to Rob if I came across harsh, but he apparently did not understand that I am not tying to tune the engine. It is helpful to know I can adjust the timing, probably 1-3 degrees would make a big difference in temps, but I if I didn't know what the temp is supposed to be or where it is at without the mod, how could I know how much it needs to be adjusted? How do you keep and eye on timing curve without having something to base the curve/timing advance on?? What instrument do you use to keep an eye on your timing? Plugs are a good indicator, but they are not real time. I know pings are bad, but you couldn't hear a ping with the mufflers I have and the decibels of my exhaust if your life depended on it. I met someone with experience racing who told me how to set up my dist, so I went with that, adjusted it to run best, start well when hot, but I started with the range set by the MFG, adjusted it according to a race expert who has a 408, and tweaked it to run at it's best. What else is there to do?
Thank you, and does this help you to understand why I need to know them?
