got the 406 in just wondering sincei have heard many horror stories what is the best way to keep them cool.. i do have properly working fans but just wana stay safe and keep her around 180 or so.. i have a 160 stat in it.. havent started it yet and with whats in my sig what kind of times should i pull in the 1/4 and estimated HP thanks for all the help

 

Why do you automatically think ... 400s=RUN HOT ??!?!?
Wasn't it said over and over and over again that the fact that 400s run hot is strictly a fairy tale ? Yes it is !! Start it, enjoy it and stop worrying about cooling it. It'll be fine! lol

 

Have a manual fan you can start at about 180 and
another that will automatically start at 200. Its also nice if you can manaually start the second fan if need be.

Mine will run 190 even at light throttle when only 1 fan is running. The second fan will pull it down from just about anytemp.

 

2ponchos

400's are great torque motors, I have run a few on the street and have had no overheating problems. Be sure to drill the steam holes in the heads to match the ones in the block. I am concerned about the vortec heads and flattop pistons, thats about 11:1 compression...too much for pump gas and iron heads.

 

the guy that built the engine said its around 10:5 to 10:8 cr i know that is kindof high have to retard the **** out of the timing.. but guess we will see going to try to start it tonight!!

 

and yes the heads are drilled for steam holes..

 

Two words, Watter Wetter, the stuff really works well. But I haven't had any problem keeping my 406 cool. Those vortec heads can handle a little more compression than other heads, and like the timing to be lower anyway, so you may not be as bad off as you think on the timing.

 

thanks yes i run water wetter in everythingi have !!! my bike and all my cars it does seem to work quite well