Which radiator

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1973dusterkid

1973dusterkid

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1.) Go wider not thicker ;

2.) Fan shroud ;

3.) 7 paddle viscous fan ;

4.) H.D. fan clutch .

You can't go wrong with the O.E.M. (or close to it) cooling system , as used on cars with Axle Packages , towing package , or a/c .

The first one (the 26" wide model) is the one to use .
 
A "Clutch" fan will actually save power vs. a (cringe) Flex Fan , as the fan will freewheel when it's not *needed* , and turn faster than engine speed when operating temps raise .
 
1973,that flex fan will cost you between 5 to 15 h.p.Go find a clutch fan off of a A/C equipped mopar at the junkyard,or put an ad up in the trader ads here.
 
Abodybomber said:
1973,that flex fan will cost you between 5 to 15 h.p.Go find a clutch fan off of a A/C equipped mopar at the junkyard,or put an ad up in the trader ads here.
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this is a really big point that i forgot about! DO NOT BUY THE NEW MP ONES!!! they fly apart at 4-5K rpm and there are lots of threads about it... we have taken the original aluminum ones over 7K and never an issue...
 
805moparkid said:
this is a really big point that i forgot about! DO NOT BUY THE NEW MP ONES!!! they fly apart at 4-5K rpm and there are lots of threads about it... we have taken the original aluminum ones over 7K and never an issue...
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wow...thats kind of disturbing to hear...I bought my MP viscous fan unit from summit about 3 years ago...it regularly sees 6500 rpm...all the time....I thought it was happening to the older units...fatigued metal, incorrect size mounting hardware. etc....?
 
mopardude318 said:
wow...thats kind of disturbing to hear...I bought my MP viscous fan unit from summit about 3 years ago...it regularly sees 6500 rpm...all the time....I thought it was happening to the older units...fatigued metal, incorrect size mounting hardware. etc....?
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the new ones have a sticker right on them that says 4000 rpm MAX...

notice i did say aluminum ones though... some of the AC and BB cars had aluminum 7 blade fans... thats what i would use...
 
im using a 26" 2 core ($40) , fan shroud ($5), and 7 blade clutch fan ($10) all out of an 86 lebaron in my 73 duster , its all i can do to get it hot.
 
..standard clutch fan spins at 70% pulley speed when engaged.
heavy duty is about 80% pulley speed
you may run a little warm in traffic with one of these units depending on your cooling system.
flex fans flatten at speed and reduce hp requ'd to turn them but have a bad rap.
some newer ones are guaranteed to 7000 rpm.
anybody have one of these newer units fail?
 
1973dusterkid -

Shameless plug here -

I am also a dealer for Champion. I sell their 3-row radiators for $199 + $25 shipping. The 2 Row, I sell for $155 + $25 shipping

PM me if interested. I can send you a Pay Pal invoice
 
73AbodEE said:
im using a 26" 2 core ($40) , fan shroud ($5), and 7 blade clutch fan ($10) all out of an 86 lebaron in my 73 duster , its all i can do to get it hot.
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Was this all a direct bolt in, or did you have to cut up the car to get it to fit?
 
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