Slip the clutch??
12-01-05, 09:37 PM
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Slip the clutch??
At what rpm is best to lanch the Rx7 for a good pick up? I heard some people talking about sliping the clutch for rear wheel and ALL wheel drive car. But I dont know how to do that? And plus there is snow now, so I won't get to practice until spring. One of my friend tells me to dump my clutch at 6000 rpm but I think that's too high, it wont get a good hook! My car push out 340hp at the wheels with stock shocks and springs but I have 18in by 9.5 Volks on the back with nitto 555 tires.
12-01-05, 10:43 PM
#2
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6000 rpm is way to high to launch, i'd reccomend maybe a little under three. Just practice and see what gives you the least amount of wheel spin. Alot of N/A stock rx7's will launch slipping the clutch, but thats only because if you dont do it correctly, the car will bog and you lose precious time.
12-02-05, 08:22 PM
#4
I hold the revs at about 5k and slip the clutch. I hold the clutch pedal right at the point where the car almost starts to move from the clutch almost engaging. You ease out the clutch as soon as the clutch grabs and the car starts to go, and floor it at the same time. no wheel hopping and fast acceleration with no rev dropping, when I do it right, it is not easy to do just about perfect, but that's the best way IMO, I don't think the tires spin at all either. If the tires start to spin and wheel hop then you could let off the gas alittle and then floor it again so you don't beat on the drivetrain and suspension too badly.
Hold the rpms steady, you will be more consistent holding it steady, and floor it when you start to go. Hold the gas steady at the desired rpms, ease out the clutch slowly and push the gas to the floor at the same time, just before the green light. You need to do it just right so that when the car starts moving your rpms continue to build and not drop like they do if you let the clutch out too fast or dump the clutch (and the car should accelerate very fast with no deceleration from revs dropping). It will take lots of practice to get good at it, I actually am still not perfect but my last launch was pretty close to perfect when i got a 1.88 60' . I started out bouncing the revs and dumping the clutch, usually resulting in wheel hop or the revs dropping low after dumping the clutch, and average 60' time of 2.3 . I think this way of lauching is alot easier on the suspension and drivetrain, just not as good on the clutch wear, so make sure you don't wear out your clutch too fast. good luck.
The above are two of my recent posts to a different thread, edited for this thread. hope it helps.
Hold the rpms steady, you will be more consistent holding it steady, and floor it when you start to go. Hold the gas steady at the desired rpms, ease out the clutch slowly and push the gas to the floor at the same time, just before the green light. You need to do it just right so that when the car starts moving your rpms continue to build and not drop like they do if you let the clutch out too fast or dump the clutch (and the car should accelerate very fast with no deceleration from revs dropping). It will take lots of practice to get good at it, I actually am still not perfect but my last launch was pretty close to perfect when i got a 1.88 60' . I started out bouncing the revs and dumping the clutch, usually resulting in wheel hop or the revs dropping low after dumping the clutch, and average 60' time of 2.3 . I think this way of lauching is alot easier on the suspension and drivetrain, just not as good on the clutch wear, so make sure you don't wear out your clutch too fast. good luck.
The above are two of my recent posts to a different thread, edited for this thread. hope it helps.
Originally Posted by tom94RX-7
I think you just need more practice/track time. You will start to get better lauches and do better 3rd gear shifts. I been going to the track often, and tonight I beat my best times and speeds by a lot, mostly all from getting better launches and better driving. My 60's used to be bad like 2.4, everyonce in a while like 2.0 . Then I learned to slip the clutch better, started consistently reducing the 60 ft's and tonight I did a 1.88 60 ft and 12.31 @ 116.39 mph, all on stock rear street tires and stock rear rims, stock turbos and stock motor just turned 100k miles, Spec stage 2 clutch, all other mods under the hood, stock rear diff. and axles, aftermarket toe links and trailing arms. I was also topping out at 15-16 psi. My tires spin a little after shifting into 2nd and they spun in 3rd just barely on my best run, I really don't think they spin much if any at all at the start in first gear, I don't hear them spin, if I do the clutch perfect it grabs and goes fast.
12-02-05, 08:30 PM
#5
Originally Posted by 90WhiteVrt
6000 rpm is way to high to launch, i'd reccomend maybe a little under three. Just practice and see what gives you the least amount of wheel spin. Alot of N/A stock rx7's will launch slipping the clutch, but thats only because if you dont do it correctly, the car will bog and you lose precious time.
12-02-05, 08:39 PM
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Under 3k is way too low IMO, 6k is alittle too high, I think around 5k worked best for me. The car will bog if you don't rev it high enough, 3k and your sure to bog I think. Alot of practice at the track helps. Your tires will spin or grab a lot differently on the street compared to the track, the track has so much more traction.
12-02-05, 08:56 PM
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I used to launch my TII at around 5500 - 6000 for the best launch. The car had a streetport, T04B hybrid, light flywheel and microtech and I was running at 12 psi.
With the stock flywheel, it liked revs around 4500, no less.
NA 13b's like even higher revs as too little revs puts you too far out of the engine's powerband. If you let out the clutch too quickly, you will get wheelspin at such high revs, but if you slip it nicely and not too much, you will get a nice launch. 3000 and the engine most likely won't have enough load to build good boost unless you're still on the stock turbo.
With the stock flywheel, it liked revs around 4500, no less.
NA 13b's like even higher revs as too little revs puts you too far out of the engine's powerband. If you let out the clutch too quickly, you will get wheelspin at such high revs, but if you slip it nicely and not too much, you will get a nice launch. 3000 and the engine most likely won't have enough load to build good boost unless you're still on the stock turbo.
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12-04-05, 01:49 PM
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i usually try to luanch my 89 gtu at around 4....anything less i usually bog...and any more id spin although i think the slip method sounds to be the best way to go.....ive never tried it myself though...i dont quite remember what my 60 footer was but i was impresed....i think to you go out and try it both way berfore you make a desision though...well thats my input...im gonna go and try out that slip lunch......l8r
12-12-05, 04:36 PM
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Originally Posted by REBELDE
wow i guess it must be a new school type of revs cause i launch at 10200 on my rotary starlet of course i used 2msd 6als with 10200 pills
01-16-06, 01:46 PM
#17
Rotary Freak
Originally Posted by drift7
At what rpm is best to lanch the Rx7 for a good pick up? I heard some people talking about sliping the clutch for rear wheel and ALL wheel drive car. But I dont know how to do that? And plus there is snow now, so I won't get to practice until spring. One of my friend tells me to dump my clutch at 6000 rpm but I think that's too high, it wont get a good hook! My car push out 340hp at the wheels with stock shocks and springs but I have 18in by 9.5 Volks on the back with nitto 555 tires.
Spookey.
01-21-06, 01:18 AM
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Originally Posted by Alex-7
You're putting 340 to the ground and don't know how to slip a clutch or much about driving in general?
Spookey.
Spookey.
I'm just here asking for the best advice on how to launch my car...not to be criticized...yeah i'm putting 340 to the ground and know nothing about slipping my clutch or driving in general but i bet i can pull on that '01 Suzuki GSX-R 600...
01-21-06, 01:23 AM
#19
I can't believe nobody has asked what the hell car you're driving, pretty hard to answer without some guideline here.
According to your garage you have a street strip clutch, is this a puck clutch because if it is, slipping the clutch is not an option. Puck clutches are either all in or nothing, boned style clutches can be slipped, really helpful when loading on a trailor, those ramps are fun with a puck clutch.
The amount of grip you'll get is ultimately decided by your tires and secondly your suspension.
The best post in here is the one asking you to test the car yourself, go to a safe location, and do some back to back launches, but remember the surface, weather, temperature, tire inflation all make a difference.
According to your garage you have a street strip clutch, is this a puck clutch because if it is, slipping the clutch is not an option. Puck clutches are either all in or nothing, boned style clutches can be slipped, really helpful when loading on a trailor, those ramps are fun with a puck clutch.
The amount of grip you'll get is ultimately decided by your tires and secondly your suspension.
The best post in here is the one asking you to test the car yourself, go to a safe location, and do some back to back launches, but remember the surface, weather, temperature, tire inflation all make a difference.
Last edited by aussiesmg; 01-21-06 at 01:28 AM.
01-31-06, 04:22 PM
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Originally Posted by Alex-7
From a 120mph roll maybe.
Or are you running 10's in your rig?
Or are you running 10's in your rig?
02-15-06, 12:20 AM
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Well enough of this talk, why don't you bring that little 600cc of yours and run me. So I can post your a$$ on the KILLS SECTION of this forums!!!!
Last edited by drift7; 02-15-06 at 12:24 AM.