Flywheel lightening for red six

[Dave_EH]

Hi,

I'm sure this has been covered decades ago, however I'm seeking opinions on flywheel lightening.

I've been running a standard weight flywheel on a red 179 with a Waggott 38/78 cam.

Looking at building a new red 202 with the same waggott grind.  Considering I'll have more torque with the new 3.25 inch stroke; would I benefit with a lighter flywheel or will I lose as much as I gain in terms of street ability?

I know everyone used to run modified holden flywheels, but people say this is dangerous. Do I need a manufactured lighter FW like a Yella Terra billet item?

Cheers
Dave

[CraigA]

Use the light Yella Terra lightweight steel version.

http://store.yellaterra.com.au/holden-6-f-wheel-neutral-balanced-l-w-8-6kg/

Also use ARP bolts and torque correctly with loctite.

[CraigA]

Do you use a 3.55 diff? Will work great on the street with that cam and lighter flywheel.

[Dave_EH]

Hi Craig,

Great. Thanks for the advice.

Currently running a 3.55 diff and W50 5 speed (with the tallest 1st/2nd ratio available) and 13 inch wheels. Happy with gearing on street. I have a new 3.36 CW/pinion but I've run this ratio before and preferred the 3.55. Triple carb induction assists with low end torque.

Really happy with the drivability of the Waggott cam at low rpm for its duration (229 @ 50 thou).

Do you Prefer medium or permanent strength loctite on flywheel bolts?  Sometimes I find the permanent starts curing before the torque is set properly.

Cheers
Dave

[FC427]

For a cheap lighter fly wheel you can use a 3.3  5 speed  Commodore  one  they are drilled for a larger dia pressure plate also as a bonus but you must check that  the larger pressure plate will not foul in your bell hosing,, most aftermarket bell housings have no issues .. The standard red flywheel is 10.9 Kg and the Blue/ Black 202 flywheel is 9 kg......FC427......

[Dave_EH]

Interesting.

I wish I knew that when I had my clutch made. I knew the black motor had a larger friction surface, and that the outer diameter is the same, but did not know about the weight.

As such, I used the red F/W I had and got a clutch made to suit.

Sounds like the commodore would have been a win/win at the time.

Dave

[FC427]

My FC has a chrome molly fly wheel and an evo clutch  do a search on hear under  getting blown im sure there are a few photos ......FC427