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Dragstrip and Launch Techniques Discussion 1/4 mile, 1/8 mile, launch discussions.

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Old 10-01-2012, 01:45 PM   #1
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Think I lost/am losing another OE clutch

Went out to the track this last Friday, also the last race of the season here... I was hoping to get some good comparisons running the stock airbox vs. the JacFab cold air intake...

Runs with the stock intake were nice and consistent 13.40, 13.38, 13.336, which is about where it likes to run in crap air (2500 DA) when stock. Exactly what I was after, a nice consistent baseline.

After Intake swap:
First pass: 13.156
Second pass: 13.40 (drop clutch for burn out, tires stay stationary, clutch slips to 5k rpms... Uhoh)
Third pass: 13.44 (drop clutch for burn out, clutch still slipping, no burn out)
Called er quits after the 2nd clutch mishap.

So unfortunately I wasn't able to get repeatable times with my intake, and I think my clutch issue needs to be assesed before trying again.

This is the second OEM clutch in the car after the first one was replaced under warranty for similar issues (slipping, pedal droping to the floor). The first clutch was replaced at 9k miles at the dealer for what is supposedly "the ugraded oem clutch"... I haven't had any issues with the new clutch until now, new clutch has appx 15k miles on it. I put the LPE "clutch return" kit on the car after the second clutch was installed, the pedal did not stick to the floor during any of these problems at the last race, most likely due to the LPE kit. This clutch probably has between 30 or 40 passes on it.

I'm thinking my racing days for the Camaro are done at least until I can get a decent clutch into the car... So without going full on race only clutch, what are you guys going with for a street/strip unit? Hopefully one that won't break the bank?

Anyone ever experience anything like this?
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Old 10-02-2012, 11:13 AM   #2
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ZR1 clutch? ZL1 clutch? Aftermarket? Anyone have any recommendations?
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Old 10-02-2012, 06:19 PM   #3
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I have a monster level 3 clutch and flywheel sitting in my living room. Picked it up pretty cheap for 400 bucks. I know a few people have had bad experiences with them but for 400 dollars I guess it's worth a shot. Should be putting it in this winter sometime.

I've heard lots of good reviews on the zr1 clutch. If I ever have to buy another clutch that's probably what I'll get.
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Old 10-02-2012, 08:37 PM   #4
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Quote:
Originally Posted by danielblack60 View Post
I have a monster level 3 clutch and flywheel sitting in my living room. Picked it up pretty cheap for 400 bucks. I know a few people have had bad experiences with them but for 400 dollars I guess it's worth a shot. Should be putting it in this winter sometime.

I've heard lots of good reviews on the zr1 clutch. If I ever have to buy another clutch that's probably what I'll get.
you buy that used I assume?
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Old 10-02-2012, 10:29 PM   #5
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I'm thinking if you just trade it in for an auto it will not only eliminate your problems, but you'll be faster too. Just saying. Lol
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Old 10-02-2012, 10:45 PM   #6
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I'm thinking if you just trade it in for an auto it will not only eliminate your problems, but you'll be faster too. Just saying. Lol
Or you could buy a GT500 that only comes in manual, or a Z06 that only comes in manual, or a ZR1 that only comes in manual, and will not only eliminate your problems, but you'll be faster too. just saying. Lol
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Old 10-02-2012, 10:47 PM   #7
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you buy that used I assume?
Yes sir. The guy bought too much clutch for his application. He ended up putting his OE clutch back in
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Old 10-02-2012, 10:56 PM   #8
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Maybe just bad luck? Go with another GM clutch if it's being offered.

I haven't had any problems. 70k miles.
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Old 10-03-2012, 08:15 AM   #9
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streetslayer over a zl1 clutch..look up tommy hendrix
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Old 10-03-2012, 10:13 AM   #10
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ya , streetslayer i hear does good , i know a guy with the zl1 or zr1 whatever and it didnt do so well for him, but he big hp tho.
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Old 10-03-2012, 11:12 AM   #11
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Are you dumping the clutch in 2nd gear at 5K? If you dont dump it hard this could happen but does not mean you clutch is gone, if you quick slip it trying to do a burnout your going to smoke it for sure! I have a good 100 passes on my stock clutch and a burnout for every pass, I have only had a issue when the fuild gets to hot. The pedal got stuck and the clutch was not grabbing or engadged completley... so it was smoking the clutch at full throttle with me not moving very fast!

That was last year and my clutch is still working great, but now I flush the fuild before every track day and let my car cool for a 1/2hr between runs... never happened again!
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Old 10-03-2012, 11:35 AM   #12
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Unfortunately, trading the car for an auto is not an option I don't think I'll ever have BIG HP... No plans for an S/C or turbos in my future. I think not this winter, but next winter I will do a cam swap, and possibly port the heads, and intake.

I like the idea of the Street Slayer Lite as it's lighter than a factory setup, but it looks like they do not offer it for the Camaro (yet?)... I sent Thomas @ Street Slayer an email asking if they had it, or planned to offer it in the future.

The other clutch I'm interested in is the Mantic ER2.

Thanks for the suggestions guys!

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Originally Posted by Bad70supreme View Post
Are you dumping the clutch in 2nd gear at 5K? If you dont dump it hard this could happen but does not mean you clutch is gone, if you quick slip it trying to do a burnout your going to smoke it for sure!
I usually drop the clutch between 3-4k in 2nd for the burnout... I've had no problems up until the last race. I've probably got 30-40 passes on this clutch. Probably had 20 on the first clutch, but I used to do a shorter burn out in first, but I was getting worse 60' times and some spin, so I started doing them in second turning them faster & longer. Usually for about 2-3 seconds.

I've been meaning to change the fluid again, but haven't yet... Unfortunately I can't let the car sit for 30 minutes between runs... As the cars drop out of eliminations, the classes run through faster, so toward the end of the night, it might get as low as a 10 minute wait for the next pass...
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Old 10-03-2012, 12:32 PM   #13
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When was the last time you changed the fluid? Trust me it makes a world of a difference on how that clutch works... you need to get those revs up to 5 and dump it... your in second gear between 3-4k then your putting to much load on the clutch like that in my opion. Thats asking for issues, I would try it again before you change your clutch and do what I am saying. If you still have issues then replace it, but make sure before you spend money you might not need to. I truely think its your burnout procedure.
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Old 10-03-2012, 12:57 PM   #14
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That seems like it would be pretty hard on things... I got the 3-4k number from the ranger acceleration page...

Quote:
Step 6
Rev the motor to 3500 and pop the clutch. Immediately lightly apply the brakes with your left foot. The brakes help keep the rear-end from walking sideways.
Which has been fine as long as I've been doing it. Although that is recommended for a Corvette which is a lighter car, so maybe the Camaro needs a higher rpm drop as it's heavier.

I changed the fluid mid season, so probably ~15 passes on it (2 days, including the problem day). I also run a Super DOT 3 (can't remember brand off the top of my head), which is supposed to have a higher boiling point I believe?

Perhaps I will change the fluid again, and upgrade to the Ideal G master cylinder while I'm at it prior to changing a clutch.
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Old 10-03-2012, 01:04 PM   #15
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Originally Posted by danielblack60 View Post
I have a monster level 3 clutch and flywheel sitting in my living room. Picked it up pretty cheap for 400 bucks. I know a few people have had bad experiences with them but for 400 dollars I guess it's worth a shot. Should be putting it in this winter sometime.

I've heard lots of good reviews on the zr1 clutch. If I ever have to buy another clutch that's probably what I'll get.

I am one of those who tried the Monster 3, against the advice of the forum. Do yourself a favor and sell the clutch.
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Old 10-03-2012, 02:39 PM   #16
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That seems like it would be pretty hard on things... I got the 3-4k number from the ranger acceleration page...



Which has been fine as long as I've been doing it. Although that is recommended for a Corvette which is a lighter car, so maybe the Camaro needs a higher rpm drop as it's heavier.

I changed the fluid mid season, so probably ~15 passes on it (2 days, including the problem day). I also run a Super DOT 3 (can't remember brand off the top of my head), which is supposed to have a higher boiling point I believe?

Perhaps I will change the fluid again, and upgrade to the Ideal G master cylinder while I'm at it prior to changing a clutch.
Change that fluid before every time you hit the track! Your getting it dirty just driving the car... my advise dont touch the brakes and get those revs up... when your burnout begins keep on the gas and revs at 5-5500 and ride it out without the brakes! This is not going to be hard on the car, what your doing IS... your actually putting more load on things this way! The vette and how he drives is not going to be the same in this car! This car is heavy... the clutch and tires are TRYING to grab beacuse of to low of an RPM... could definetly be your problem and getting the clutch very hot... then causing you to blow threw it later in the day.

My car is a daily driver, over a 100 passes and 100 more horse power then stock, I am getting sub 2 sec 60s on stock tires and no sign of clutch fade! To many times people want to blame the car or part, driving a stick car is an art and can be messed up pretty easy! If this is the second time you gotta start thinking... "hey mabey its not the clutches falt". Not trying to bash on you or anything man, just trying to help.

Its taking me this 100 passes just to get were I am, I still have allot to learn myself! I still think I suck
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Old 10-03-2012, 05:03 PM   #17
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monster sucks from most i have heard..many are running tommy,s strret slayer with a negative comments i have heard, with big hp
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Old 10-03-2012, 05:23 PM   #18
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Street Slayer Carbon Twin Disc. Good street manners and excellent track characteristics. As Mike said, have not seen a bad thing said about that clutch. I run it hard and it just takes a beating and keeps grabbing.
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Old 10-03-2012, 06:02 PM   #19
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Street Slayer ALL day long, I had issues with a ZR1 and the Street Slayer is been GREAT.
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Old 10-03-2012, 06:49 PM   #20
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I flush my clutch fluid every oil change. I havent had a problem since Ive been flushing and leaving the line with the clutch just about to grab(not on the floor or near it). But last thursday its been 5k miles since I flushed it(I change my oil every 5k) and when I staged up and came off the clutch a tad too much and the car rolled the prestage beam. I instantly pushed the clutch back in to keep from rolling and the lights came down. I left and the pedal stayed down......
Im tired of it being picky so Im upgrading soon, very soon.
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Old 10-04-2012, 02:22 PM   #21
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I wonder if this "fluid changing" problem would persist (as bad) with an aftermarket clutch... I'm all for maintenance, but I don't want to have to change the fluid every other day to keep the stock clutch operating right under extreme conditions.
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Old 10-04-2012, 03:50 PM   #22
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Street Slayer ALL day long, I had issues with a ZR1 and the Street Slayer is been GREAT.

This seems to be the best option out there for the SS, I probably should have spent the extra $$$ when I replaced mine way back when, instead of trying to save a few $$$.

Bottom line is if you race and are modified you better have this in the budget along with axles because your going to need it at some point especially on DRs.
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Old 10-04-2012, 10:24 PM   #23
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I have to agree with dropping the clutch at 5K in 2nd for the burnout. I've done it probably 60-70 times this year and the stock clutch holds on (and I have a lot more than stock power). My pedal has stayed on the floor a few times but it doesnt seem to be very often. I never changed my fluid before so I'm sure that was a huge problem for me..... I also leave the line at about 3800-4K in 1st.
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Old 10-04-2012, 10:42 PM   #24
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Maybe just bad luck? Go with another GM clutch if it's being offered.

I haven't had any problems. 70k miles.


You changed the transmission to?
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