No. That's why I recommended that to the OP. You get more efficient air flow that way. The 95-96 fans work in tandem. You will only get one speed unless you wire it like the 95-96 with three relays. I think one speed would be fine.

This is assuming that you have the dual fans in the rear of the rad.

 

No, I'm not saying that they should be at these temps. But in 100* Miami heat they will at idle in stop and go traffic. What I was saying was that his car is not overheating.

Upon re-reading the original post, Darkstallion was asking about his secondary fan. I'm not positive on the 93's but it should come on at some point, and he said that it doesn't come on until he turns the A/C on. He should probably throw a couple of pennies at this.

 

I REALLY can't say on the newer models....

I can tell you what mine does. I had all these same issues that the OP is describing.

Soon, the Waterpump sprung the leak out of the lower weep hole...replaced it

Then the radiator Split open....replaced that with one of the OEMs from thepartsladi

Then, my car was running Too Cool and the Overdrive would kick out when the temps hit 159°. Unexpected downshift will have you buying new whitey tighties.

So I put a 185° thermostat in the car. and that solved that problem.

My car can sit with the A/C running in the heat and the temps are about 195°........all day.....Stop and go and the temps will go to ~218°....

Highway/Freeway (you pick the Outside temp that suits you) temps are at 179-183°. And yes we are in our summer heat as well.

But as I stated, I can't speak on the LTx platforms......

So I am a results driven individual. I am always going to suggest the "Stock" system be addressed and working properly prior to telling someone to Mod a ~15 year old cooling system.

You tell me that you have a new or boiled out radiator, new pump, fresh coolant......you tell me that you have all those decades old components replaced and you are still having an overheating problem..........

Will I tell you to add a fan switch???

At that point I would still suggest you have your coolant checked for aromatic Hydrocarbons and I will suspect the Head gasket is allowing super heated gasses into the cooling system......

Sorry, that is just me, I think the guys at GM knew what they were doing when they spec'd the size radiator and the Flow of coolant they did when they designed the LTx platform.

 

I had to remove my radiator and use a piece of .032 wire to force the tiny debris out of the fins. It seems the General decided to cut the fins in the middle to add more cooling surface, and the tiny seeds and really tiny pebbles get stuck in between these serrations.

oh, and I will tell you why we use 160 thermostats.............

It helps slow down the heat absorption rate of the hood and other dense materials under the hood that don't give up thermal change easily.
When I leave work, I have to sit at 4 stoplights prior to accelerating up to 45 mph, and if I leave the 185 thermostat in, the car is 195 halfway through the third light. Now, it's 179 when I hit 45. True, the car does run at 190-195 on the freeway in 110 degree heat, but it takes it a lot longer to reach that on city streets when you start out while you are getting to the freeway where it runs cooler with more airflow.....

 

thats exactly the difference I saw when I went to the 160 thermostat.

 

I rechipped my so the fan turns on lower (180) - $75 - 15 min no wiring changes

 

[QUOTE=coupeguy2001;1570839427]It helps slow down the heat absorption rate of the hood and other dense materials under the hood that don't give up thermal change easily.

Something else that helps. Taking the upper wheel wells off from under the hood. A few months back I said here I was going to do this as an experiment. I did this about 2 months ago, took the upper wheel wells out and my 85 seems to be happier. It stays between 195 (195 thermostat) and 205 degrees.

Just like, what goes up must come down, what comes in must go out. Coupeguy is right C4 engine compartments hold a ton of heat. My 65 and 74 big blocks can prove that. When I come home with my 85 and open the hood, it's not like opening an oven set at 400 degrees anymore.

Anyway, taking the upper wheel wells out works for me as my 85 comes out for a drive about once a month only in nice weather. Sure it gets dusty, so I hose it off, go for a ride and everything dries. My engine and compartment stays very clean. I don't use any spray on shiny stuff under the hood. That just makes for the dust to stick more to this and that.

Oh, I put 2 toggle switches under the dash to control both fans about 4 years ago. I got into the habit of just leaving them on all the time. I figured, why wait to see 215, 220. I just leave the fans on all the time and I don't have to constantly look at the temperature gauge anymore.