adequate cooling with 3Row 71-455 ??
#1
adequate cooling with 3Row 71-455 ??
Have a stock 71 350 and want to swap to iron headet (NonAC) 455 9,5:1.
Not sure but in stock form it must be a 3 Row correct???
Any Summer- EXPERIENCE with the stock 3 Row radiator / 455 and no shroud but with FlexBlade ...?
Not sure but in stock form it must be a 3 Row correct???
Any Summer- EXPERIENCE with the stock 3 Row radiator / 455 and no shroud but with FlexBlade ...?
#2
Another quest: will a big flexblade fit in a stock 71 fan shroud like this :
https://www.rockauto.com/en/catalog/...n+shroud,10707
https://www.rockauto.com/en/catalog/...n+shroud,10707
#6
The 3 row should do fine if it is flowing properly and if the 350 radiator is the same dimensions as the 455. My 455 with A/C has a 3 row from the factory but I have no tested it to the max yet.
#7
Jmo, 3 core, shroud, and a good clutch fan and 180° thermostat. Flex fans have been around for years and I've tried one not so much for cooling but supposedly they freed up HP. Wrong, I've seen test on them and they don't work. I stick to factory clutch fans. As I said, jmo.
#9
I have the 3 row 350 rad in my 455 car. it wont keep up on the highway temps above ~60°, round town and speeds to 50ish no problem stays at thermo temp, at 70mph it starts heating up after 10-15 mins i get off the hiway, looking into a 4 row now
factory clutch fan w shroud and all rubber flaps in place.
factory clutch fan w shroud and all rubber flaps in place.
#10
option
I have the 3 row 350 rad in my 455 car. it wont keep up on the highway temps above ~60°, round town and speeds to 50ish no problem stays at thermo temp, at 70mph it starts heating up after 10-15 mins i get off the hiway, looking into a 4 row now
factory clutch fan w shroud and all rubber flaps in place.
factory clutch fan w shroud and all rubber flaps in place.
Re-core your existing tanks with a high efficiency 3 row core. I put one in my 1972 W-30 4 speed car in 1998 and have never had a moments trouble with it.
Last edited by oldsmobiledave; June 1st, 2017 at 03:14 PM.
#11
Auto City Classics AT6872 aluminum radiator (2-core, 1-1/8" tubes)
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
Last edited by 70sgeek; June 1st, 2017 at 07:11 PM.
#12
Auto City Classics AT6872 aluminum radiator (2-core, 1-1/8" tubes)
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
#13
Auto City Classics AT6872 aluminum radiator (2-core, 1-1/8" tubes)
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
#14
Have try to check the rows in the tank but cant see anything than water
#15
#16
#17
Auto City Classics AT6872 aluminum radiator (2-core, 1-1/8" tubes)
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
http://www.autocityclassic.com/cheve...inum-radiator/
keeps me at 180 all day long in FL heat!
IF my car has a 3 Row currently (???) and change to this 2 Row must i change the upper / lower radiator brackets ?????
#19
Here's the combo I use on my 350 - factory shroud, the Auto City 2-core aluminum rad, Imperial 220618 fan and 215045 thermostatic clutch
I'm running a '72 350 with stock-length Flo-Kooler mechanical water pump and all play very nicely together
I'm running a '72 350 with stock-length Flo-Kooler mechanical water pump and all play very nicely together
Last edited by 70sgeek; June 2nd, 2017 at 09:20 AM.
#21
I did similar with a high efficiency core in the original 3 row end tanks on my car and it stays cool during 115+ summer temps, on the highway, with the AC on.
#22
Many people recommend the Hayden fan clutch. I think the regular street unit is the 2705. There are heavy duty and severe duty units but they will probably just lock all the time and you will not get the benefit of freewheeling when engine isn't hot. The severe duty is for trucks and require a fan with more pitched blades. I just switched to a 7 blade clutch fan from a 6 blade flex fan and saw lower temps on my BB 87 Cutlass.
#23
Many people recommend the Hayden fan clutch. I think the regular street unit is the 2705. There are heavy duty and severe duty units but they will probably just lock all the time and you will not get the benefit of freewheeling when engine isn't hot. The severe duty is for trucks and require a fan with more pitched blades. I just switched to a 7 blade clutch fan from a 6 blade flex fan and saw lower temps on my BB 87 Cutlass.
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