The flywheel is going into a 1989 Mustang 5.0 with T5 Tranny. I have
stroked the motor to 331 and the harmonic has been changed to a 28.2 oz
imbalance. The harmonic has a key so I am pretty sure how it mounts but
the flywheel has 6 bolt holes (evenly spaced) and no dowel or keyway.
The flywheel is 157 teeth 28.2 oz imbalance (crank/rods/pistons
balanced to 28.2 oz as well).
Jim Warman wrote:
Isn't it funny how modifications never seem to matter... until after we
might see a concern. My advice was offered without any aftermarket
indications. . Now that the full story is coming in to light, I'm back
pedalling for all I am worth. From here, everything is going to depend on
your aftermarket supplier.
This is the kind of information that was needed in the original post but you
chose to avoid mentioning the modifications.... All bets are off... My
advice is not good advice because of this omission
Doesn't it almost seem like some people think the LESS information they give
you the cheaper a repair will be? In this guys case I think the only person
he should be asking advice from is the one that did his machine work and
rebalanced his flywheel. But when he talks about a 26.2oz imbalance I have
to believe he should have some one else put this package together. The most
weight I've seen on an externally balanced engines flywheel is only a few
Thanks for the flame.
The 28.2 oz imbalance is stock for the 1966 - 1982 ford windson
flywheels. The 82 - 90's Mustang uses a 50 oz imbalance as stock. So
perhaps if you don't know the answer to the question maybe you could
ask for clarification rather than flame. It would be much more helpful
to me as well as anyone else who might have a similar question.
As for including more information I did not realize that it would be
helpful as the stock crank and stock flywheel are not marked or doweled
either. Had I known it would have been important I would have included
it in my original message. And after the amount I have spent to date on
this block I am not interested in the cheapest repair - I merely
thought there was something simple that I had overlooked ie. 180 degree
separation between weights on the harmonic and flywheel. Since it
appears that there is no simple explanation I will contact stroker
Thank you for taking the time to respond in any manner.
IIRC, you will find that the stock crank/flywheel combo has offset
holes...i.e. the flywheel will only fit one way - no matter what you try.
Accept the flame in good nature.... you didn't include all the pertinent
information... done deal. You couldn't even be bothered with including the
engine size in your first post. If anyone is an ass, it isn't anyone that
replied to you.
However, instead of asking here, would you not be further ahead to ask the
people that made your crank? Would we phone Dominoes to ask how much a
Ceasars pizza costs? Would we phone McDonalds to tell them that A&W burgers
give us heartburn?
Would we advertise to the world that common sense is on vacation?
I do a lot of mods to a fleet of old Dodges (too many friends, too little
time). If I have a cam question I can't answer, I phone Crane (supply most
of our cams). If I have a crank question, I phone Eagle and, if I have head
question, I phone Edelbrock (even though we spent 2 grand whipping the heads
for our stroker into shape - at another shop).
So you got a stroker - who supplied the crank??? did they balance it
internally or design it with stock parts in mind? You have left too many
questions unanswered to even guess at what you will have....
Thank you Jim,
I will try mating the flywheel and see if one (or more) of the holes is
It wasn't my intention to be an ass - My apologies. And like I said
earlier - I will be more than happy to call the supplier I just thought
I might have been missing something simple so thought I could ask the
You might also be able to get more specific information at a group like
rec.autos.ford.mustang or something like that (I believe there is one for
Ford Mustangs, though I don't know the exact name).
I wish I knew the answer to your question. All I know is that my dad used to
balance engines years ago. And when he balanced an engine, I would swear
that balancing the flywheel was part of it. But I only saw the set once or
twice and my memory is cloudy.
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