5.0 HO SWAP?

[Guest]

I just installed a 1986 5.0 ho motor in my bronco. What will happen if I use the vibration dampner from my origional 71 302..... thanx for any help

 

[Explore74]

DON'T run your old balancer! Your old engine ran with a 28.2 oz. imbalance, while the 85' (an I have been told possibly 83') and newer engines run with a 50 oz. ombalance. With the age of the rubber in your balancer, it may shred at some point(when, who knows). Go to the junk yard, and get a balancer from any 85' or later 302 to be safe.

 

[rulebreaker]

[quote author=Explore74 link=board=5;threadid=12521;start=0#93359 date=1040447492]<br>DON'T run your old balancer! Your old engine ran with a 28.2 oz. imbalance, while the 85' (an I have been told possibly 83') and newer engines run with a 50 oz. ombalance. With the age of the rubber in your balancer, it may shred at some point(when, who knows). Go to the junk yard, and get a balancer from any 85' or later 302 to be safe.<br>[/quote]I disagree! The engine is balanced with the flex plate or flywheel not the dampner! Besides if he's using the Bronco assories he needs the 3 bolt dampner.

 

[randall25x]

Explore74 is correct

 

[Explore74]

rulebreaker, I never said that the balancer was what balanced the engine. But, the balancer offsets the harmonics set up by the engine. If you take a 30 year old balancer and ask it to do what amounts to more work, you are asking for trouble. I have seen main bearings get hammered out of their saddles in less than 100 miles when the rubber in the balancer failed.

 

[rulebreaker]

[quote author=Explore74 link=board=5;threadid=12521;start=0#93470 date=1040506714]<br>rulebreaker, I never said that the balancer was what balanced the engine. But, the balancer offsets the harmonics set up by the engine. If you take a 30 year old balancer and ask it to do what amounts to more work, you are asking for trouble. I have seen main bearings get hammered out of their saddles in less than 100 miles when the rubber in the balancer failed.<br>[/quote]Couldn't he put a new Bronco harmonic balancer on it so that he could use his original Bronco accessories, if that is what he is trying to do?

 

[Explore74]

for sure. I would just hate to see someone trash the bottom end of their hard earned iron with a questionable piece.

 

[Guest]

Thanx guys for all the help. So I need to get the flywheel balenced for my motor as well..

 

[Explore74]

most definately. good luck with your project, and may santa bring you lots of good hardware. Cerry Christmas!