scotty2000ss

iTrader: (2)

Not bad for a bolt on LS6 eh?

North*power

iTrader: (1)

I absolutely agree that heat is a non issue with set ups that are installed and driven correctly.
What is your clutch/flywheel and set up again?
I'd really like to know why companies don't push the use of aluminum flywheels and lighter assemblies over the steel?? Maybe because of potential failure rates and warranties? On OEM applications a heavier set up would provide more of a "buffer" for people that don't know how to drive.

North*power

iTrader: (1)

I still disagree, if he's able hook and put the power down right away and be in the powerband then there is no benefit in slipping the clutch. Even if he did slip it in the first 60' it would only be for

HioSSilver

iTrader: (8)

I'll give ya more good info.

A 10" clutch would have a area of 31.1"

My titon triple has a area of 17.2......but since there are 3 discs that jumps to 51.8.

So for those thermal dynamic professors in here which one has more area to disipated the heat you are talking about?
I can slip it or drop it and spin the tires. It's a m6 car on a dr so traction really is hit or miss.
Mine is a tilton triple disc on a button with a auto flexplate. I use a qtr master tri lite hydraulic release bearing.
I'd need a slick to come off the clutch faster than i am. It modulates nicely under power. You gotta remember these are not some junk *** no tq having 4/6 cylinder engine. These things have a 50lb crank and 8 cylinders. No need to slip it like you think.

dailydriver

OK, but world class 60 foots and drag racing is NOT what EVERYONE on this thread is concerned about.

Some (like Jim M. above and myself) are more concerned about 'streetability' in stop and go traffic jams, and autocross and road course usability.

My car will NEVER EVER see a launch pad/drag strip again, as long as I own it.

weedburner

No need for a slick, if it's the typical M/T 275 DR, those are good for 1.2 60's on a decent track. Your engine does not have enough power to get them spinning on it's own, it gets help in the form of a quick discharge of stored inertia energy that happens before the chassis has a chance to transfer weight. That extra energy comes from the rotating assy losing rpm just after you release the clutch. If the clutch were released at a rate that allowed your WOT engine to maintain your launch rpm, there would be no inertia energy discharge and you could likely get 1.4 or better 60's. Not sure your clutch has enough capacity to handle that though.

weedburner

Friction surface area has little to do with a clutch's thermal capacity.

HioSSilver

iTrader: (8)

My clutch is rated for 800hp.


I don't have enough power to spin a dr?? What ****** planet are you on? It must have 2 or 3 times the gravity of earth.

The 60' on the run in the sig was a 1.52......not really leaving at full steam either. I don't have a 2step so there is room for improvement.

weedburner

We all make compromises based on the what we are trying to achieve. Just pointing out that the lightest clutch assy isn't always the best choice.

weedburner

Your clutch rating of 800hp is a loose reference to it's torque holding capacity, not it's ability to dissipate 800hp worth power if slipped.

Can you roll across a sticky starting line at 4500-5000rpm in 1st gear, nail the throttle without touching the clutch, and still break those radials loose? A pair of 275's can put down over 8000lbs of thrust on a good track, no way you are anywhere near that without help from a flywheel.

You have potential to shave .1+ off that 60' if your clutch could take the added heat. If you have an rpm graph of a good run, i could likely show you where that potential is hidden.

HioSSilver

iTrader: (8)

I have never rolled across a launch pad and then nailed it.......what you're saying makes no sense. The whole issue of launching is controling the shock of the tires. On top of that not every track is prepped like a outlaw drag radial track is.

Put a heavy clutch in your car if you think it's so great. I'll keep doin what I've been doin and drive this bolt on ls6 a little further into the 10s.

gsteele

How old was she? Is that even legal?

scotty2000ss

iTrader: (2)

Lol. Didn't think anyone saw that

weedburner

That's the problem...it isn't possible for him to hook and be in the powerband at the same time until up around .7 sec or so into his run.

scotty2000ss

iTrader: (2)

So if he was using a heavier clutch he would net a better 60ft and lower ET?

weedburner

Heavier clutch launched the same way will likely get him a slower 60ft and slower et. What you want is a clutch assy that has just enough capacity to tolerate the amount of slipping required to achieve maintaining launch rpm, until the car is going fast enough to match that rpm at the point of clutch lockup. For a really good 60', that launch rpm will need to be up around 5500rpm or more. That's about a second of full throttle clutch slip.

scotty2000ss

iTrader: (2)

Gotcha. What clutch do you recommend?

HioSSilver

iTrader: (8)

Yup...plenty of et left in it. But it's not because of the clutch. Its because of traction.
Are you really gonna recommend a street car a slipper style clutch??....lol....ok

nmass399

I could break a set of 275's loose everytime i dropped the clutch in my car. Even on a well prepped track. m6 and drag radials is a very different animal than m6 and bias ply's. You don't have to slip the clutch at the launch, i dont(not you scotty2000ss you need to slip yours cause of rear). When i go to the drag strip i go wot on the 2 step and drop the clutch. I use wheel speed with the bias ply's to make a good 60ft.

WTF?

I deduct from this thread that weeburner does not race, isn't fast, and has nothing but theories.

I also deduct from this thread that the guys with the lighter clutch/flywheel setups are the fast guys in this thread.

I also deduct that some people have made up their mind, and will argue even though they have neither.

I was cutting 1.5-6 sixtys in my vette with a tex, and M/T drag radials ad could either bog it or roast them off the line depending on how bad of a brain fart I was having. Meaning that most of this threads argument is unlreliable at best.

Hio pointed out some good numbers on area...but some people just don't want to learn anything. Before reading what he posted, I didn't even snap to that. THanks.