Aluminum Flywheel

**NitrOmm** · 04-19-2009, 06:13 AM

Just installed my new toys ( see below), when tuning on the dyno .. the clutch broke loose at 5200 rpm. I need to replace the clutch. My friend has a brand new ZO6 clutch & flywheel, in an effort to save $ I am thinking of using this one as opposed to the purchase of ZO7. The additional problem is the ZO6 flywheel & clutch is like a ton of bricks. Will I notice a difference going from an aluminum flywheel to this steel heavier flywheel.
Second question: should I abandon the ZO6 and just go for the ZO7 set up, as we estimate the HP to be about 420 rwhp once into the 6k range.
Thanks.

**NitrOmm** · 04-19-2009, 06:30 AM

meant LS6 & LS7. its too early ....

**Bottesini** · 04-19-2009, 11:52 AM

For me clutch and flywheel choice is very dependent on how the car will be used.

If it is just a street car that will get occasional abuse (mostly with street tires) than I would go with the LS7 clutch and fly. The heavier fly will make it easier for start and stop type situations, not to mention the LS7 will have a very close to stock feel.

If the car is going to get road raced than light fly and a more serious clutch.

If the car is going to drag race often with sticky tires especially, than a heavy flywheel and a serious clutch. I have a RAM clutch on mine right now, it is not much worse than stock, but it does chatter sometimes, and can grab more than I predict compared to stock. It is by no means unstreetable, just a very small amount more aggressive than the stocker (which is why I don't mind how high of an RPM I go to when I launch at the track as long as it will hook up).

**blackbirdbrain89** · 04-27-2009, 12:55 PM

if u have isssues hooking up then go with a alum fly wheel... note u dont have as much force but it takes less time to get the tires stoped spinging just a single light let off and it will hook up.... i have a buddy with a car 90% the same and i have a alum flywheel and he has a stock... if u get a more agressave clutch kit the PP will ba stronger there for heaver..... so to make up the lbs u have to lose some some where... thers 8 sec ls1s with steal and alum so is just about set up