Mine are XXL. Luckily they had a scratch n dent pair available to save me some money.
CK5
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$200 K5 (454 K5 now) *too much junk in the trunk
- Thread starter HankScorpio
- Start date
Yeah, pretty spendy. If they work well then worth it.
It was a 195 stat. Swapped to a 180. Slowed down the heat but eventually edged into the 200's driving around town. Pulled into WalMart for burger buns at 208. Came out and it was 240 when I started it up from heat soak. Immediately dropped to 230 and then to 225 as I drove away. Couldn't get it below 210, and it would creep up into the 225 range at mid throttle 2200 rpm slow cruising. The intake air temp was 190-200. Its 85 out. Got to get some heat out from under the hood.
Sometimes little things really pay off. When I put the radiator in I added a brass 90 fitting with a petcock and a foot of hose to the drain. It snakes around the steering box and down the side of the frame. I also used an adjustable thermostat housing with an o-ring, not a gasket. Just drained half the coolant into a bucket, swapped out the stat and dumped the coolant back in. Super easy and no mess.
Sometimes little things really pay off. When I put the radiator in I added a brass 90 fitting with a petcock and a foot of hose to the drain. It snakes around the steering box and down the side of the frame. I also used an adjustable thermostat housing with an o-ring, not a gasket. Just drained half the coolant into a bucket, swapped out the stat and dumped the coolant back in. Super easy and no mess.
Sound like air flow. Hate to see what it runs here
Cool for us
Cool for us
Thats exactly what I have in mind. AZ, NM, UT, CO all get hot in the summer and I like going down there to explore. Even WY sees high 90's in the desert. Need to cool it down some more. It may run hot but I am really impressed with how well it runs so far. ProFlo4 is pretty nice.
I added some from ebay on my suburban. Its crazy how much heat you could feel coming out with the fans on.
Just came back from a cruise. Popped the hood and there was a ton of heat from the engine and the big cast manifolds. I think some louvers where you have them, right over the exhaust would shed a lot heat.
Even 10 minutes later with the hood up the manifolds are 450-500+ degrees.
It's fun in the winter because you can really see the heat waves wafting from the hood vents.
Run cool mentions that on the website, de-ices the windshield.
Has anyone noticed any difference with the air coming into the cowl after installing hood louvers?
Since the kick panel vents get air fed to them from the cowl, did it get hotter air coming through afterwards?
I imagine that there's not any difference after a certain speed on the road, but slow speed maybe?
Since the kick panel vents get air fed to them from the cowl, did it get hotter air coming through afterwards?
I imagine that there's not any difference after a certain speed on the road, but slow speed maybe?
Seems like if I need foot vents, it's so bloody hot, I wouldn't notice a difference.
I don't think my vents are far enough back to really effect the windshield. Didn't want the distributor getting water on it.
I don't think my vents are far enough back to really effect the windshield. Didn't want the distributor getting water on it.
bp71k5
3/4 ton status
Are the fan turn on temps adjustable? Seems like the 195 tstat in mine is fine, the 180 tstat just opens a bit sooner and doesn’t help it run any cooler. I just have the fans come on around 210ish and off at 200ish with a 195tstat. Shouldn’t NEED louvers to keep it cool.
Fans are set to come on early at about 175. I don't love the fans I have right now, they are dual 12" that came with the radiator, checking into options. During covid almost every radiator and fan was backordered. A bit more fan and some louver should keep things under control. I'm not far off, just need to drop 20 degrees or so and make sure it will work in the desert temps too. Even with the water temp ok the under hood temps are going to affect the intake air temp. The cast manifolds for the big block radiate a crazy amount of heat which a louver would help remove.
bp71k5
3/4 ton status
The fans should really be set to come on at a higher temp than the tstat, other wise they’ll be running all the time and never shut off. Odd that they aren’t keeping it cool enough though. I have cast manifolds as well.
Never shut off is fine for now breaking things in but not for the long term. I would like to set one fan to come on with the thermostat and then the second fan to come on around 200. I don't currently have enough fan for that.
What fans are you running? Big block?
2 12's are to small. Hayden says for a 350 2 16's. So big block I'ma gonna say min 2 18's if you have the radiator real estate.
Are your inner fenders cut?
Was talking with @K5Devil yesterday, 1st thing he mentioned. His are cut and running nice and cool here with stock fan and shroud.
Do you have ac? Is it being used while seeing these temps?
Are your inner fenders cut?
Was talking with @K5Devil yesterday, 1st thing he mentioned. His are cut and running nice and cool here with stock fan and shroud.
Do you have ac? Is it being used while seeing these temps?
I’d bet the 12” fans might not be big enough. I’ve got the old flex-lite dual 15” truck fans. They move a ton of air, but they do draw a lot of amps. When these take a dump I’ll probably go with a spal pwm fan from a Camaro ss.
Looking into some flex a lite duals on summit. 28" width 19" tall and about 4" deep is what's available on the radiator for the fans to fit
Currently running dual 12" that came on the radiator. Pretty sure they are too small. China made too so who knows what they flow.
No AC but its an AC cab and I have a compressor on the accessory drive to possibly add it later. I have a soft top, half doors and I live at 7200ft so not a priority.
I have also heard that the camaro ss fan is a good one.
Inner fenders are cut some at the front which does let some air in and some slots for the shocks to come through.
Anyone have a good way to let the fans run after shutoff but still let the ProFlo4 control them the rest of the time? I should be able to rig up a relay and temp sensor of some sort.
Currently running dual 12" that came on the radiator. Pretty sure they are too small. China made too so who knows what they flow.
No AC but its an AC cab and I have a compressor on the accessory drive to possibly add it later. I have a soft top, half doors and I live at 7200ft so not a priority.
I have also heard that the camaro ss fan is a good one.
Inner fenders are cut some at the front which does let some air in and some slots for the shocks to come through.
Anyone have a good way to let the fans run after shutoff but still let the ProFlo4 control them the rest of the time? I should be able to rig up a relay and temp sensor of some sort.
Do you suppose that if the fans are too small, they could also restrict airflow when speed is high enough to not need the fans on? As in too small of holes in the shroud causing a restriction?
I would just think that you would see a better drop in temperature over 45 mph.
I would just think that you would see a better drop in temperature over 45 mph.
