Still to hot????????

[challengerx]

Ok this weekend our club displayed our cars in the local mall. The drive to the mall the car ran at 185 the whole way, while waiting in line to get inside and idling through the mall up she went to 210 and it was very cool out. This I my second setup, champion aluminum 26 rad with their dual electrics fans, 180 thermastat, and high volume water pump. This is in a challenger with a 416 aluminum heads . I have not yet put on the shroud that came with the kit just don't think it will make that much of a difference. Is that wrong thinking  and what is this drilling a hole in the thermastat about. Thanks

[dodj]

I would first check out if those fans are up to the task. But I would put that shroud on just to see if it does make a difference.
I find the mopar 5 blade clutch fan the best. Never had much luck with electric fans.

I would resist the drilling a hole in the t-stat idea. I would also try to confirm the temps with a second temp device.
I use a 26" chapmion rad with a 440 source HV pump and housing and a 195* t-stat. Never goes over 195*.

[burdar]

Shrouds make a big difference.  I think they are probably even more important with electric fans.  If the fans are marginal, the shroud should help.

I drilled a small hole in my thermostat.  It helps a lot while initially filling the rad.  I was able to get most of the coolant into the radiator since the hole in the thermostat let the air out while filling.

You also need to look at your timing.  That can make the engine run hot.  How do you have it set up?  What's your initial timing set at?

[challengerx]

Just looked at champions web site, looks like with the kit I got both 12inch fans only pull 2000 cfm of air as opposed to their hi perf 12 inch fans that pull 3200 cfm of air. I forget where the timing is. I guess I will check it again and put the shroud on. Thanks

[cudabob496]

Shroud usually critical for effective cooling.

1/8 inch hole is not a biggee, and helps vent system during filling.

Increase you idle which increases coolant pump flowrate.

engine compartment cannot be tight (air flow wise), or it increses back pressure to reduce airflow through radiator.
I took off flaps over wheels, and have a vented hood.

A larger fan/fans that pulls 2500+ cfm will help.

make sure timing is not too advanced

[plumcrazzy]

Shrouding your fan (with a properly fitting shroud) will make a lot of difference in your cooling. Pulling air from around the backside of the radiator is a lot easier than pulling air through the radiator--kind of path of least resistance thing. The shroud forces the fan to pull much more air through the radiator.

[EMCD]

Honestly, I have almost the same issue. 408 stroker & a 727. The two electic fans without the shroud fine on the highway, bad in town. Then I got the shroud and it was hot on the highway and hot in town. It pretty much stays at 200-210 all day. I'm beginning to think that better fans or a clutch fan might be the way to go.

[cudabob496]

Honestly, I have almost the same issue. 408 stroker & a 727. The two electic fans without the shroud fine on the highway, bad in town. Then I got the shroud and it was hot on the highway and hot in town. It pretty much stays at 200-210 all day. I'm beginning to think that better fans or a clutch fan might be the way to go.

I have an alum radiator. when moving, don't even need fans on, since air can move freely through radiator.
Some of those shrounds that cover the entire inside of radiator block air that would otherwise keep things cool,
when moving.  If you never go above 210, you should be ok. 

[cudabob496]

Honestly, I have almost the same issue. 408 stroker & a 727. The two electic fans without the shroud fine on the highway, bad in town. Then I got the shroud and it was hot on the highway and hot in town. It pretty much stays at 200-210 all day. I'm beginning to think that better fans or a clutch fan might be the way to go.

I put a 5 inch spoiler in front, attached to my lower valence, that forces more air into radiator when moving.

[cudabob496]

http://www.streetrodderweb.com/tech/1306_prevent_cooling_problems/viewall.html

[Chryco Psycho]

The drive to the mall the car ran at 185 the whole way, while waiting in line to get inside and idling through the mall up she went to 210 and it was very cool out.

It sounds like no issues while moving just not enough fan capability when stopped , shrouds make a huge difference because it forces the fan to pull air from the whole area of the rad not just the area in front of the fans , Personally I do not like electric fans , nothing is as efficient as an 18" clutch fan driven by the engine , you can use the Jaguar clutch , it is much shorter & bolts onto the Mopar water pumps if clearance is an issue .

[cudabob496]

It sounds like no issues while moving just not enough fan capability when stopped , shrouds make a huge difference because it forces the fan to pull air from the whole area of the rad not just the area in front of the fans , Personally I do not like electric fans , nothing is as efficient as an 18" clutch fan driven by the engine , you can use the Jaguar clutch , it is much shorter & bolts onto the Mopar water pumps if clearance is an issue .

Ya, but chuck the mechanical fan, and loose 15 lbs and gain 15+ hp

[72cudamaan]

Maybe we should take a poll and see who is more interested in losing a couple of pounds (fan doesn't weigh 15 pounds and you have to weigh the replacements) and possibly 15 hp as opposed to being able to drive our cars on a daily basis without overheating.

[EMCD]

Mine will get above 210 on occasion. It never blows over stumbles. It's only in stop and go heavy traffic when it's 90+ outside. I added a tranny cooler, lager tranny pan and 8 qt oil pan. It's better, but still too hot for my liking.

[Chryco Psycho]

Maybe we should take a poll and see who is more interested in losing a couple of pounds (fan doesn't weigh 15 pounds and you have to weigh the replacements) and possibly 15 hp as opposed to being able to drive our cars on a daily basis without overheating.

the electric fans probably weigh more than the clutch fan does , & yeah I will take reliable cooling over 15 hp  you could lose the alt or water pump & gain HP but some things are just nessisary .