The V8 Owners Forum -

I am going to spend a little time digesting your post Daniel as it gives more depth than my basic understanding

Hi Dan,

Nice of you to drop in and provide your usual technical expertise, hows the new 4.3? Rover project with the Mickey Thompson heads coming along?

Strangely I ended up with a 22lb flywheel on my 4.35 Rover and it does rev quite freely and is very easy to pull away.

Regards,

Kevin Jackson.

> hows the new 4.3? Rover project with the Mickey Thompson heads coming along?

The Mickey Thompson heads have a really strong exhaust port compared to
the intake port. It's really a matter of the intake valve needing to be
larger. If I increased them to the 1.775" (like the Buick V6 valves in the
in the ported Buick 300 heads), they would do much better but that is not
in the budget for this build. Back cutting the intake valves made a
noticeable difference on the flow bench so I took the heads up to Jon Carls
and had him backcut the rest of the valves and do a bit of bowl blending.
That improved the flow balance a fair bit but I'll need to re-design the
cam based upon the new flow numbers. The GM 215 dual four barrel intake
isn't going to fit under the sloping TR8 hood so I'll be using the Huffaker
(saving the Willpower for the 4.9L with ported Buick 300 heads). Should be
dropping off a friend's Olds 266 (4.3L) with ported Buick 300 heads soon.
It's going into an MGB. He recently imported one of the reproduction Huffaker
intakes from England and it's different than my orignal (flat carb base
versus the canted one on mine). We're making a deck plate to do the bore
and hone.

Unfortunately, I may have to back burner my 4.2L project until I recover
from an unexpected ZF transaxle rebuild. The thing shifted great and the
only reason I had it opened up was to install a taller 5th gear but inside
it was all chipped teeth, pits and rust. The parts for the ZF 5 speed
transaxles are stupid expensive. Still waiting to hear what the final
tally will be. I've got a 403 cubic inch Ford Cleveland V8 getting ready
to go on the dyno next month for the other Pantera. The plan is to pull
the engine and transaxle out this weekend and do some detail work on the
engine compartment before installing the new engine.

> Strangely I ended up with a 22lb flywheel on my 4.35 Rover and it does
> rev quite freely and is very easy to pull away.

Good to hear.

Dan

I must say that I've been 'blown away' by Daniels post, I will certainly be looking into getting my flywheel lightened in the near future. Cheers!

Thanks Dan.
Brilliant, very useful information.
In addition of course there is also the benefit of the static weight reduction of the flywheel itself. It all helps !!!

All this brings back great memories of the 60's when we used to fit a 997cc Ford Anglia flywheel to the 1500cc engine and buzz through the gears in no time.

Regards Denis

sidecar wrote:I must say that I've been 'blown away' by Daniels post, I will certainly be looking into getting my flywheel lightened in the near future. Cheers!

When you've practised on yours, let me know and you can have mine

After a few hours of machining away hard spots and making an adaptor to hold the flywheel in a lathe that was barely big enough! I now have a 22.6lbs flywheel. It started the day at 26.6 so it must have already had some weight removed. The hardspots were quite thick and it took over 1.5mm to remove them.
Now I have to get it balanced with the crank etc.. more on this later.