[TR] lightened flywheel

[J.C. Hassall]

Dave,

I'm running a Fidanza in my autox/street TR4 with no (apparent?) problems.
Mine is a shrink fit onto the crank (10 minutes with a MAPP torch).  Since
Aluminum flywheels have been known to wobble loose, I also had four extra
bolt holes and an extra locating pin cut into the crank and I used ARP
bolts.  That was definitely a "belt, suspenders and tight pants" approach,
but do far no problems, and I frequently shift at 6K.  As Randal mentioned,
Joe Alexander at A.R.E. (www.the-vintage-racer.com) manufactured a very
nice light weight steel flywheel, but he was out of stock when I built my
engine.  His and the Fidanza both weigh about 10-11 lbs.  Be sure to use a
TR4A / TR6 diaphragm pressure plate (not the TR4 finger PP).

BTW, I'm sure you realize that the ad claim about adding 10+ HP is bogus.
It just feels that way because the reduced rotating mass enables the engine
to spin up and down faster, which leads to faster car acceleration.

jim

On Sun, Jun 7, 2015 at 9:54 PM, dave n <dave at ranteer.com> wrote:

>      there are a lot of vendors and pricing for a lightened flywheel for
> an ealry tr4.  and recommendations?  warnings?
>
>
> http://www.jegs.com/i/Fidanza/383/172441/10002/-1?CAWELAID=1710568080&CAGPSPN=pla&catargetid=230006180000850618&cadevice=c&gclid=CI7Exf79_sUCFQYuaQod9hYAcw
>
> for an example or
>
>
> http://www.sparktecmotorsports.com/rrz-rz72441.html?utm_source=googlepepla&utm_medium=adwords&id=91571117117&gclid=CPK7kML9_sUCFREoaQodLSkA8g
>
>
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