[Healeys] Flywheels

[Earl Kagna]

Dan, Gentlemen:

What everyone seems to have missed here is the primary reason that people 
convert to a BJ8 flywheel in the earlier 6 cyl. engine - the ability to 
install a BJ8 clutch without having to have a machine shop rework the dowel 
peg locations and clutch mounting bolt pattern.  Those who have done so - 
myself included - seem to think that the BJ8 clutch is a great improvement 
over the earlier one.

I believe that the flywheel weights are the same on both the BJ7 and BJ8. 
Whether or not to lighten the flywheel on a road car wouild depend on what 
the owner is trying to achieve, and the result would depend on exactly how 
light the modification is.  I did this on my BT7 years ago - moderately 
lightened BJ8 flywheel and clutch and have been very happy with the result. 
The engine (otherwise totally stock) builds revs slightly quicker on hard 
acceleration, and yet still has a good idle quality.  I used a flywheel from 
Bill Bolton - I think the weight reduction is something like 4 - 5 pounds, 
not really enough if you're building a competition engine, but fine for a 
driver Healey.

I was happy enough with the change that I had Bill lighten my BJ8 flywheel 
as well - that has also worked out very well - idle quality has been fine.

So  ---------- Dan, as long as you're 'in there anyway', I would recommend a 
BJ8 flywheel (moderately lightened if you wish) along with the BJ8 clutch. 
>From personal experience, it will work well on your BJ7.

Earl Kagna
Victoria, B.C.
BT7 tri-carb
BJ8



----- Original Message ----- 
From: "Dan" <jobu53 at hotmail.com>
To: <healeys at autox.team.net>
Sent: Tuesday, February 17, 2009 12:24 PM
Subject: [Healeys] Flywheels


I have a BJ7 with engine number 29F-H4376 and am getting ready to do some
engine work. I have read here that a lightened flywheel will improve
performance. I want to ask the group if anyone knows how much lighter the 
BJ8
flywheel is compared to the BJ7. Also, your thoughts if the BJ8 flywheel is
the best option or should I have mine machined down or purchase an aluminum
flywheel? Thanks for any input.



Dan Serrao

1963 BJ7