42 replies to this topic

[N/A-PWR]

Your Gravity is powerful,

If you can walk miles then You are fine. Dave I

 

p.s. half the weight of normal is good

p.p.s. any material that is light is good

Edited by TORYPOWER, 22 February 2013 - 11:09 PM.

[dattoman]

I've run both in my race Dattos

Both come in at the same weight

I prefer the CroMo one and will be using them exclusively in the future

 

For a Chev/Holden I'd go for a CroMO with a small twin or triple plate clutch and rev the tits off it. If its for racing that is

 

For street I'd go a lightened CroMo with a grippy cushioned button clutch and drive accordingly

Still undecided on my sedan as to whether to go auto or manual

But if I do go manual I'll go with my own recommendation above

[Uncle Chop Chop]

For street I'd go a lightened CroMo with a grippy cushioned button clutch and drive accordingly 

 

I've never heard of a CroMo flywheel before. How long have they been available? I bet they aren't a cheap option.

[TerrA LX]

I would say steel flywheels are ChroMo.

[TerrA LX]

Well the good ones anyway, maybe not the cheap chinese ones...

[dattoman]

http://www.xtremeclu...au/en/catalogue

[Struggler]

I only know of one person that used an alloy flywheel on a 308.

 

The engine was a healthy mini stroker and due to lack of rotating mass would rev up and return to idle like an F1 car.

 

Unfortunately it was impossible to get off the line, you could rev it to 6K and dump the clutch and it would just get dragged down to idle and move off like a wounded slug.

 

The alloy flywheel was replaced with a lightened steel unit and the car drove as it should.

 

I couldn't recommend the aluminium flywheel.

 

JMHO

[N/A-PWR]

Hi pinklx,

Looks like a standard 6 cylinder flywheel is 10.8 kilo's and mine is 7 kilo's which was very responsive and had no problems unless doing less then 60 kph in top gear with a 2.78 lsd diff.

( must say that the LC/J cars only weigh 925 kilo's or more )

I machined all the casting marks from the standard flywheel front and back and then milled between the pressure plate bolts to the clutch diametre as that step was 10 millimetres deep with an R3 radius ball nose cutter for the final edge.

( used a rotating turntable on the mill )

It was also said to have a flogging plate made out of hardened steel for the 6 flywheel bolts to clamp the flywheel tighter which I made and used as well ( the flywheel never came loose). Dave I

 

p.s. I see the V8 ones been lightened from 16 kilo's to 10 kilo's

[dattoman]

When building Welbys targa hatch we faced the question of what flywheel to use

We went with the middle of the weight range... not too light... not too heavy

I think its still in the car and working well

[N/A-PWR]

so it seems the general train of thought is a mid weight steel is the go for a street car. 10kg yella terra is what im now thinking.

So this is what your looking at pinklx,

a Holden V8  YT10.8 Kilo, cause the next one is 7 Kilo. Dave I

 

10.8 Kilo:-

http://www.yellaterr...egoryIdentity=3

 

 

7 Kilo:-

http://www.yellaterr...egoryIdentity=3

 

p.s. my one was reduced by 35% from normal and your 10.8 Kilo one is reduced by 32.5% from normal.

 

Good call 

Edited by TORYPOWER, 26 February 2013 - 01:40 AM.

[Dave6179]

On  my six, I changed from stock to a Starfire 4 item, I think I saved about 6lb?? Made a difference too, and the whole engine only cost me a bottle of my home made rum!

[Uncle Chop Chop]

The weight of the flywheel is generally in proportion to the weight of the vehicle. If it's on a staionary engine (generator, compressor etc) they are generally a bit heavier.

[unclefestal34s]

 

So this is what your looking at pinklx,

a Holden V8  YT10.8 Kilo, cause the next one is 7 Kilo. Dave I

 

10.8 Kilo:-

http://www.yellaterr...egoryIdentity=3

 

 

7 Kilo:-

http://www.yellaterr...egoryIdentity=3

 

p.s. my one was reduced by 35% from normal and your 10.8 Kilo one is reduced by 32.5% from normal.

 

Good call 

 

i use that 7kg steel lighten flywheel in my 308-355 stroker and find very effective on the dragstrip

[TerrA LX]

My compressor doesn't have a flywheel :(

[Dave6179]

So it can't be very fast then???

[WhiteA9XS]

 yep i,ll agree with most here , i,ve tried the ultra light 7kg yella terra , was a pig out of corners on the track , back to the 10kg middle of the road steel flywheel is a good allround drivable 308 flywheel , i even prefer it in the road car over the stock unit .

 

 but i suppose if your drag racing and keeping the rpm up there then the lighter steel and possibly alloy may be ok . 

[rexy]

I have one of the ultralight yella terra ones in the hatch behind a healthy 383 Holden. Drives fine for street duties.

[Uncle Chop Chop]

My compressor doesn't have a flywheel :(

 

When I was at the SEC they used to have portable generators and compressors powered by diesel engines. Sorry about any confusion.