LSCHLEM

Here is the situation. My LS2 Clutch is shot. I did all the Ranger stuff which was good and lasted longer but unfortunately I only learned about
clutch fluid maintenance when it was too late. The larger issue is I have
507 Rwhp / 461 rwtq and I had the wheels prepped with nitto r555 on
widened 18" fronts looking for that 10.99 and 130 Mph. Knowing I need a
Clutch assy with bleeder assy's my question is would a ls7 Clutch be good enough or will I need a LS9 or RPS considering everything I mentioned here
Thanks, Leon

JUIC3D

LS3s come with the LS7 clutch and here is my experience.

Car made 494/443 for the majority of the 152 drag strip passes and now makes 517/462.

I got about 130 passes at the drag strip until the clutch became too unreliable for my tastes. I'm no longer able to do any type of burnout as the extra heat is too much and the clutch sticks to the floor and simply will not hold. I can drive it on the street and do some highway pulls right now, but after a 3rd-4th gear pull, the clutch pedal gets stiff and wants to fall to the floor. I'm putting in a new clutch this weekend and I'm anxious to see what my stock clutch looks like when I pull it out.

The LS7 clutch was designed to hold 505 FWhp and you're making 507rwhp. Using common sense, it serves that the OEM clutch would not be a wise choice, especially given drag strip abuse it will be subjected to. It will last for a little while but I can't see it lasting very long if you're going to drag race it.

I would strongly recommend you go with a clutch that is rated substantially higher than what you're going to make with your motor to allow for some cushion when pushing the envelope.

LSCHLEM

You make a good point. Thats how mine acts. It sticks to the floor above 5500 RPM. Its funny. Joe G. has about 5,000 runs on his LS2 and it still lives on. A LS9 costs about $2,500
installed at a Credible shop. The LS7 would be about $1,500 for the same labor. Thanks for your input. Leon

JUIC3D

Ya, Joe is a good buddy of mine and his gearing definitely helps the abuse his clutch would otherwise be required to take.

Considering that you're paying for labor, I would definitely make sure you 'over clutch' rather than just put something in to get you by. The extra ~$300-500 for a really nice clutch would be worth it to ensure you don't need to change it in the future.

LSCHLEM

Yea you make a good point about having plenty enough clutch. I too have a 4.10 rear. I would like to put the Clutch in myself but I am not equipped to handle that. I put the TFS 225 Heads on myself with plenty of forum help. I feel I could have used a little more Cam but the car drives like stock. Did jeremy F tune your Car. Your 10.67 was quite impressive. You are right there with DSP & Bracole

LEAVINU

LS7 clutch wasn't good enough for me and I don't even drag race. Numerous airstrip races dealing with the sticky pedal did it for me. On to a real clutch I went.

All_Motor_C5LS6

Have you thought about insalling a tick clutch master cylinder if your clutch isn't slipping.

Detoxx03

I have the Katech LS9R clutch and it cost $1600 for the kit.

C7&7

I run the LS7 clutch with the RAM aluminium flywheel with 506 to the tire. I do not race the car though.

DANZGLASS

If you plan to stay around your power check out this clutch. I have 535/490 in my C5Z and it holds all day. Cost is low and it drives great no chatter at all. I think it's about the same holding power of the monster stage 2. All great reviews of the diamond clutches on LS1tech.

Stage 2 is the one I am using.
http://www.diamondclutch.com/

JUIC3D

Jeremy did the initial tune way back in October. Since then, I've added more go-fast goodies and retuned the car with some guidance from trusted friends. I consider the car self-tuned now as many, if not all, of the important part throttle and WOT tables have been modified by me.

Original tune versus my modified tune

GARY2004Z06

RPS makes a superb product. We are making a little more HP and more TQ than your LS2 and the RPS stands up to the abuse of high RPM launches. We consistently 60' in the mid 1.3s to low 1.4s. We believe that this is the best street/strip clutch on the market.

JUIC3D

Gary, I keep hearing you say you are consistent in the 1.3-1.4 60fts. Do you have any videos? I'd like to see them

LSCHLEM

My clutch does not slip but it sticks to the floor especially from 3rd to 4th. I also removed the return Spring and cant get it back on. Shoulder problems. What is the tick master ?

All_Motor_C5LS6

http://www.tickperformance.com/tick-...r-c5-corvette/

http://forums.corvetteforum.com/c6-t...-cylinder.html

GARY2004Z06

Here are the last three consecutive passes of the day at the rental that robz, Matt Hauffe (Tune Time Performance) and myself hosted in September. Atco will show the 60' on the scoreboard. You will see that the 60's were 1.41, 1.35, and 1.38, respectively.
http://www.youtube.com/watch?v=VnBdxvLyULE
General comments:
First launch was terrible.
We were very pleased with the second launch.
Third launch was decent but the 2-3 shift was slow.

JUIC3D

That's a great video Gary, thanks for sharing. Your car is so quiet and then bam, you're knocking on the 9 second door. Nice job

GARY2004Z06

Thank you. We had a similar experience at the T&T at Atco in December when we ran the 9.97. The last three passes were 1.39, 1.39, and 1.36.

Joe_G

474 runs and 64,000 miles to be exact. Someday I will need a new one I guess.

Gary those runs are always fun to watch! What is the car bogging down to on those launches?

If I bog my car that low it's a 1.8 60 foot for sure. My little ls2 has only 417 rwtq peak compared to the 427 which has more torque down low I have to do a totally different launch technique of slipping my clutch to keep the rpm's above 4500 to get a 1.4. Can you slip that clutch like that or will it grab like it's doing in your car?

One thing about the clutch grabbing...can't beat a wheelie.

GARY2004Z06

Thanks Joe. On the first wheelie, the car bogged down to about 2890. The other passes were 4042 and 3321, respectively. We have induced clutch slip and it evidenced on the second and third passes. It is just not what you are use to seeing on the stock clutch. Depending on the clutch and setup, it happens to a different degree.