Griffin radiator and twin fans still running at 190-200?

northeastmopar said
My two 10" fans have what Griffin calls a true CFM rating of 898 per fan. So we are at about 1800CFM and the radiator has two 1" cooling tubes. The shroud is custom fit to the radiator with 8 rubber flaps which are forced open as the car gains speed. As stated earlier. I have not driven the car yet. Just talking about idling right now. I seem to be hearing that 210 is not really all that hot for this build? That is good news, and I will post what happens down the road when I take her up the highway.

I don't know what they mean by "true cfm". That's not scientific jargon, that's sales and marketing. I know that there are different testing methods to come up with a rated cfm, so you can't necessarily assume one manufacturer's rating is the same as another. But 1,800 cfm seems very low. It's like comparing different dyno numbers or flow bench ratings. What one dyno says and what another one says may not mean the exact same thing. But, they should be in the same ballpark. 1,800 cfm isn't in the same ballpark. That's half.

But yes, I wouldn't be too stressed out about a car that's holding and maintaining 210 at idle. It is a little high considering I don't think you're dealing with ambient temperatures that are all that hot yet, but with a new engine and a car that hasn't been on the road yet I wouldn't be buying new fans just yet. It's worth watching, but I think you have more tuning to do.

northeastmopar said
Why do you think I supplied this Post to Abodies?? There is another issue that I have not checked yet. When installing this whole thing, I failed to re-install a grounding wire from the front light harness and I also noticed that the terminal end of my black negative battery cable which is grounded to the aluminum head had a real loose crimp and pulled out with a tug. I know grounds play major issues with Mopars. I am wondering if the grounds are playing with the sending units and not allowing the fans to go on at the 185 temp?? I will get them fixed and repost here to keep all interested parties informed to maybe help someone else.

Yes, the grounds are very important. I mentioned this earlier I think too, if the fans aren't able to pull the amperage they need, you aren't going to get that rated cfm. And if you have poor grounds, you won't supply the needed voltage. It could also mess with the sending units, but I think you need to confirm your temperatures with an IR or other methods to make sure the discrepancy isn't the gauges. Could be the fans are operating fine and the temp gauge you're looking at is off.