this!
for a low HP car a steel flywheel is better because it stores rotaional energy due to its weight to help get the car off the line
a higher HP car will be better off with the aluminum to help let them spin up.
There was an article in hotrod magazine a while back about what's new in clutches... and they touched lightly on aluminum flywheels. The general message was that a steel or iron flywheel with more mass would naturally provide more torque for a launch. The difference in weight between a steel and aluminum wheel is half. They went on to say that heavier cars like old 57 chevys, impalas blah blah should stick with steel because they need it to get out of the hole.
In contrast, the lighter cars, i.e. fox mustangs, with big cube balanced strokers already make big torque, and benefit more from the acceleration than suffer from the small loss of torque.
That's hotrod- not me. but those guys have been around racing since before I was born and I'm an old fart.
It's a good idea imo if you're turning a lot of rpm's to at least use steel, because iron can and will explode, and it ain't purty. I've seen it.
this!
for a low HP car a steel flywheel is better because it stores rotaional energy due to its weight to help get the car off the line
a higher HP car will be better off with the aluminum to help let them spin up.
thats kind of a blanket statement. There are alot of other factors, tire choice, how good track prep is, where the motor makes power, launch RPM... theres a few more factors to keep in mind
yea... i should have said rule of thumb i guess
im at a toss up for what flywheel to put in my car. its not going to be making huge power on the motor (under 300ish) but should be up around 475-500 on the bottle so at that point its going to be hitting the tires pretty hard to begin with and i know im going to end up breaking the T5 and going to go to an A5 set up and a different disk (26 spline). not sure if i should just do an aluminum one to help save the trans a little bit or just put a billet steel in it and let the bitch eat
... and just to throw some more BS into the mix...
I'm thinking that for a track car (think quarter mile) running DOT tires or 10.5s and either a turbo or centri blower that the aluminum might be the better choice (generally) where higher rpm clutch drops might be the launch method of the day without ripping the tires clear of the track surface.
Radials yes, the aluminum i think is better, but not on any kind of bias ply. I was running a 10.5 stiff wall and it still had a slight bog even off the limiter.
Question: Will you launch with the nitrous or will it come on after launch?
Know what would be sweet? A flywheel where a set of weights could be swapped out through the inspection panel.
Figure out your launch method and fine tune by adding/removing weight from the flywheel. I bet somebody already makes such a thing.
I'd be on the fence with that setup. Lightweight flywheel - rotating assy take the brunt. Steel flywheel - tranny takes the brunt.
why reinvent the wheel? Thats why they make slipper clutches
not to mention that you could not do that without screwing the whole balance of the engine up
yes you could
would just need to remove the flywheel to do it right and have the "rings" be located off dowel pins and have the proper imbalance to them. basicly you would need to have a 0 balance flywheel and have weighted rings for 50oz imbalance at different a few different thickness. it wouldnt be cheap but it could be done.
If you took the trans and clutch out, but the post i replied to said you would put them on thru the "inspection panel" on the bellhousing, which isnt going to happen, and even if it was somehow possible it would be unrealistic that it could be done that way without disrupting the balance
why reinvent the wheel? Thats why they make slipper clutches
not to mention that you could not do that without screwing the whole balance of the engine up
for a drag car yes, but on a high speed road course car, or auto-x where the car is already moving aluminum makes it giddy up a whole lot faster, mmmmm reving to 7k on a road course
on my car i think it helped alot, mine will go 7k rpm on a daily basis, and I think i would have alot more trans trouble if i had that extra weight to sling around.
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