99Yuk
Full Access Member
Yup, that's what I did! 
speaking of efans....
- Thread starter blizz
- Start date
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For you guys that run 2- 16" fans with no shrouds.......you are only cooling 2/3rds of the radiator.
Length x width of the radiator in square inches vs square inches of both 16" fans and you will see that a shroud will give you 1/3 more cooling area.
I had 2 fans on my 93, then built a custom shroud and mounted the same fans on it and it never got over 180 ever AC on full blast in 115F. In NV, AZ, NM, TX I would say run a shroud.
Length x width of the radiator in square inches vs square inches of both 16" fans and you will see that a shroud will give you 1/3 more cooling area.
I had 2 fans on my 93, then built a custom shroud and mounted the same fans on it and it never got over 180 ever AC on full blast in 115F. In NV, AZ, NM, TX I would say run a shroud.
NOVAhoe
Full Access Member
i ran that same red fan kit from ebay on my cherokee when i had it, it came with 3 10 inch fans and i had one wired up normally with the stock e fan for the ac and all and the other 2 came on with the ignition but also with a switch for the winter cause it would be too cold lol, they worked great but it would have been alot better with a shroud, i ended up putting my stock clutch fan back in before i sold it and it still ran about the same temp, maybe a little warmer, next time i would spend the money on the flex a lite kit with the shroud
The Shroud is important too.
Do not ignore the importance of the shroud.
I have recently replaced a Perma-Cool setup that had a motor fail, with a Flex-a-lite setup. I had run the Perma Cool for 3-4 years.
They both have the same basic CFM specs, but I now realize that the Flex-a-lite has twice the cooling power of the Perma Cool because of the tight shroud that controls air flow.
The Perma-Cool had it’s fans close to the radiator, but no shroud containing the air flow.
The Flex-a-lite has a tight fitting shroud that it molded with soft seals that make a tight fit against the radiator. Even though the fans are further away from the radiator, than the Perma Cool, they really pull the air through.
I can actually feel the breeze outside the grill of the air rushing in.
When I switch to manual, it will take the engine down to the thermostat temp in a very short time, even in 95 degree weather.
Do not ignore the importance of the shroud.
I have recently replaced a Perma-Cool setup that had a motor fail, with a Flex-a-lite setup. I had run the Perma Cool for 3-4 years.
They both have the same basic CFM specs, but I now realize that the Flex-a-lite has twice the cooling power of the Perma Cool because of the tight shroud that controls air flow.
The Perma-Cool had it’s fans close to the radiator, but no shroud containing the air flow.
The Flex-a-lite has a tight fitting shroud that it molded with soft seals that make a tight fit against the radiator. Even though the fans are further away from the radiator, than the Perma Cool, they really pull the air through.
I can actually feel the breeze outside the grill of the air rushing in.
When I switch to manual, it will take the engine down to the thermostat temp in a very short time, even in 95 degree weather.
Do not ignore the importance of the shroud.
I have recently replaced a Perma-Cool setup that had a motor fail, with a Flex-a-lite setup. I had run the Perma Cool for 3-4 years.
They both have the same basic CFM specs, but I now realize that the Flex-a-lite has twice the cooling power of the Perma Cool because of the tight shroud that controls air flow.
The Perma-Cool had it’s fans close to the radiator, but no shroud containing the air flow.
The Flex-a-lite has a tight fitting shroud that it molded with soft seals that make a tight fit against the radiator. Even though the fans are further away from the radiator, than the Perma Cool, they really pull the air through.
I can actually feel the breeze outside the grill of the air rushing in.
When I switch to manual, it will take the engine down to the thermostat temp in a very short time, even in 95 degree weather.
Which flexalite settup did you go with? You mean to tell me you feal a vacuum outside the grill? Wow! Good stuff....
SunlitComet
OBS Jedi-Do Good
Ha, you should put some pushers between the lower end of rad and front of engine and have the hot air exit thru a double cowled hood.
Thanks, that’s a good idea. I think I will see how this new air flow works for a while before changing anything. I’m still trying to keep this tahoe looking stock.
There has never been a problem if I’m moving, just sitting in gridlock seems to be a bit of a issue……..
There has never been a problem if I’m moving, just sitting in gridlock seems to be a bit of a issue……..
SunlitComet
OBS Jedi-Do Good
Yeah because there is no airflow thru there or maybe air is too hot. You do have the filters right near the rad air exit. Perhaps inter-coolers.
It's the same one everyone's been talking about, the #280.
I have some extra heat generating things going on, so I can use all the air movement I can get.
Holy shit! Nice pic, know I understand what the TT means in your username! Have any quarter mile #'s? What are your 60' times?
