Also, with the two pin setup........do the fans auto turn on high when the A/C is turned on? Do the "pressure enable" switches in the PCM work or is high speed only enabled by temperature?

 

That's a nice setup, I may have to go that route some day. Looks like your fans for ac are only controlled by ac pressures (which I like), but I don't understand why fan1 and fan2 have different turn on pressures, unless they run at different speeds or something?. I also like that there is a fan turn off speed (don't need my fan running when I'm cruising down the highway at 80mph lol). I don't understand what the "Fan #1 Turn on by AC Temp = 224" is all about though

 

What do the numbers mean in the A/C pressure tables? Are they some kind of metric pressure?

 

I am not an A/C guy but i assume that as the temps rise across the condenser, the pressure in the system rises as well? As far as the "fan #1 turn on by A/C" is concerned, it must be a fail safe i guess because the other switches would be satisfied way before that comes into play.

Yes they are kPa values.

 

OK, the fail safe makes sense...I also wasn't aware that the PCM monitored a/c temp, I thought it only monitored pressure. Just some quick a/c operation info...As the refrigerant is compressed, it turns from a liquid to a gas and gets hot, then as it travels the the condenser it cools, (the condenser radiates heat), and the refrigerant leaves the condenser as a high pressure liquid. It's very important that the condenser always has good airflow across it for the a/c system to operate properly

 

I am running 6.0 radiator with them fans in my 8.1 1/2 ton swap and they work fine. 180 degree thermo stat and it stays there. Any more pics of the whipple on the 8.1?

 

you can also adjust the idle air settings to add some air when the fans kick on to get rid of the loss in rpm.

 

Any effects performance wise??? Like better MPG's or seat of the pants feel

doubt it though with a wippled 496

 

Sorry, have not checked this thread in a while so I know the questions are old.....sorry....

It got rid of the terrible rushing air sound that you get when the fans kick in. Since I have picked up the other 8.1L (daily driver truck) there is a pretty big difference between the two in the way it feels when you take off from a light with the mechanical fan engaged. I did not notice much (if any) of an hp/tq gain....but now that I have the other truck to compare it too, I would say there is definately some difference....just not sure how much.

ED:

I have thousands of pictures.....anything in particular?