Originally Posted by oldschoolchevy
Bruce, I also agree that your stock 2 core radiator is not able to meet your current cooling needs. Note: At speeds above 40 mph, your fans and shroud do not effect cooling since you are getting plenty of forced air flow through your radiator.
I have a 500 hp 400 SBC Stroker, and run a 31" wide summit universal fit 2 core - 1" wide tube and I never go over 180 even when the outside temps are in the upper 90s. I also run a 7 blade clutch fan with a shroud.
I didn't care about having the installed radiator and shroud look stock... but that is something you will need to consider with your radiator selection.
A couple of other things to consider...
You may want to install a high volume water pump (if you haven't done so already).
You also want to pull a couple spark plugs and see how they look. A lean condition (whitish color plugs) will cause your engine to run hotter. Adjust carb jetting if needed.
Do you have your vacuum advance connected on your distributor? If not, I recommend you do... but be sure to confirm your total advance with vacuum advance connected does not exceed 48-50 degrees. There are a lot of posts written about the benefits of using the distributor's vacuum advance on a street driven car.... and how you can control the rate and limit the degrees with an adjustable vacuum advance canister and also adding a vacuum advance stop plate.
Note: Above vacuum advance recommendation is for a normally aspirated engine. I am not sure if this applies when some type of "boost" is added (turbos, nitrous, prochargers, etc).
Thank you for the input. Yes, I have the vacuum advance hooked up, I do not know the total advance, I've been busy working out other bugs, like those *&%$#$% leaky ARP head studs. My God to they leak like a sieve, I even used ARP thread sealer! I had to pull the ones I could easily pull and add 4X laps of teflon tape, then more ARP sealer. They still went in easily with hand pressure only!
I then added the AC Delco radiator sealer tabs, between the 2 I got it under control.
The initial timing is set at 10 degrees, I'll check the total timing this week.
As far as the carb jetting, I don't have an AF meter hooked up yet, I do have one, just not hooked up. The carb is a brand new Edelbrock Thunder 800 CFM carb that came with the top end kit. It should be jetted fairly close stock, but yes, I do need to check it.
As far as the spark plug coloration, the engine only has about 100 Miles on it, so I seriously doubt I can get a good read on that, unless it's way the hell off. It runs too good to be that far off. Very responsive and tons of torque.
EDIT: Yes, I have a high flow water pump and t-stat.