View Poll Results: How do you launch?
I drop the clutch.
106
20.99%
I slip the clutch.
399
79.01%
Voters: 505. You may not vote on this poll
How to Launch
Evolving Member
Joined: Sep 2004
Posts: 319
Likes: 0
From: DesPlaines/Niles IL
Someone told me way back when Evos first came out, the best way to launch since its AWD is to let it slip. Dropping the clutch on a AWD will most likely cause your car to bog down = sux0rz.
Originally Posted by KazzEvo8
Aren't you just helpful?
I autocross and want a good launch, there are times out of the gate like a rocket is a good thing, other times it isn't.
My launching experiments have me eating a bit too much clutch but doing better now. I'm not getting to the point that I really get any chirp or spin - yet. Isn't the best result a light, hazing spin as the motor gets up to powerband and the car shoots forward? ... or is the fastest approach with no wheelspin?
Thanks for your input!
I autocross and want a good launch, there are times out of the gate like a rocket is a good thing, other times it isn't.
My launching experiments have me eating a bit too much clutch but doing better now. I'm not getting to the point that I really get any chirp or spin - yet. Isn't the best result a light, hazing spin as the motor gets up to powerband and the car shoots forward? ... or is the fastest approach with no wheelspin?
Thanks for your input!
funny, i can't drop anymore. I slip at 6000 rpm and it gets me 1.6 - 60'.
I wish I could drop tho. It's about second or 2 faster than slipping launch, since its so immediate.
But I rather replace my clutch than my transmission.
Yes, you could damage your transmission dropping than slipping. I've seen this too many times on evos.
oh and restrictor taken out also helps damage your tranny.
I wish I could drop tho. It's about second or 2 faster than slipping launch, since its so immediate.
But I rather replace my clutch than my transmission.
Yes, you could damage your transmission dropping than slipping. I've seen this too many times on evos.
oh and restrictor taken out also helps damage your tranny.
evoricer...i think ur times might have something to do u with ur boost being so high..stock evo should only really be runnin 21 psi tops....the extra boost ur runnin could be doing alot of things to hurt ur times
Dang, there is a lot of bad info on this thread. Some good too. Here is my two cents.
Slipping the stock clutch is a recipe for disaster unless you are a pro (which I am not!). Reving too high (at or above 6500rpm) and dropping is the second worse thing to do.
Simple: You need to get the tires spinning off the line. If the tires spin, there is a manageable amount of stress on the driveline.
This method will get you 1.8 60ft times (not bad but not great either) all day on a lightly modded Evo 272 to 350bhp:
1. Put 35lbs of air in stock or similar tires.
2. Rev the engine to 6000rpms.
3. Drop the clutch fairly fast, but not as fast as you can.
4. The tires will spin about half way through first. Be ready for them to catch. When they do catch, look at the tach and shift at around 7200rpms.
As you get better, and more comfortable with this approach, let a little more air out the tires. I wouldn't go too low though, maybe 30lbs. I personally like a lot of air in my tires, even now. The 1.65 60ft time I did a couple of weeks ago was on less grippy than stock Advans (Michelin Pilot Sports) at 34lbs. Remember, more air in the tires should help MPH as your roll with less resistance. Also, as you get better you can drop the clutch at lower and lower rpms until you get to the point where the tires will spin, but just enough to NOT bog. I use the term drop instead of slip because that is what I believe works. BEWARE: When you start getting to the mid to low 5000 rpms, you risk bogging, which will break and burn stuff. Play it safe.
As you mod your car more, the technique you use depends on your mods. With my current setup, I slip my Cusco twin disk fairly fast when climbing my rpms up somewhat quickly. I engage at around 4800rpms, I think...
Of course, I am only sharing what worked for me on my particular Evo. I pulled my stock clutch at over 20,000 miles. It was still in good shape.
Slipping the stock clutch is a recipe for disaster unless you are a pro (which I am not!). Reving too high (at or above 6500rpm) and dropping is the second worse thing to do.
Simple: You need to get the tires spinning off the line. If the tires spin, there is a manageable amount of stress on the driveline.
This method will get you 1.8 60ft times (not bad but not great either) all day on a lightly modded Evo 272 to 350bhp:
1. Put 35lbs of air in stock or similar tires.
2. Rev the engine to 6000rpms.
3. Drop the clutch fairly fast, but not as fast as you can.
4. The tires will spin about half way through first. Be ready for them to catch. When they do catch, look at the tach and shift at around 7200rpms.
As you get better, and more comfortable with this approach, let a little more air out the tires. I wouldn't go too low though, maybe 30lbs. I personally like a lot of air in my tires, even now. The 1.65 60ft time I did a couple of weeks ago was on less grippy than stock Advans (Michelin Pilot Sports) at 34lbs. Remember, more air in the tires should help MPH as your roll with less resistance. Also, as you get better you can drop the clutch at lower and lower rpms until you get to the point where the tires will spin, but just enough to NOT bog. I use the term drop instead of slip because that is what I believe works. BEWARE: When you start getting to the mid to low 5000 rpms, you risk bogging, which will break and burn stuff. Play it safe.
As you mod your car more, the technique you use depends on your mods. With my current setup, I slip my Cusco twin disk fairly fast when climbing my rpms up somewhat quickly. I engage at around 4800rpms, I think...
Of course, I am only sharing what worked for me on my particular Evo. I pulled my stock clutch at over 20,000 miles. It was still in good shape.
Originally Posted by redevo561
i have a act clutch installed best way to launch it havnt taken it to the take since it was installed thank ????
WOW.. now that's a sentance!
i've got an '05 with that 5k rpm rev limiter, so i'm limited to the 5k rpm launch, but it appears that i do build boost while the "factory launch control" does its thing. i've been told to let out the clutch halfway (or part way) and then as I feel contact, to feed out the rest of the clutch pretty quickly... now no matter how many times I consider this method, I keep thinking that this will burn out my clutch quicker than anything. My friend claims to use this method, but while revving higher. Is there any validity to this? In "quick-slipping" or "slow-dropping" the clutch, is there any modulation required as you're pulling off the clutch or do you have to feel it out as you go?
sorry i dunno the answer to your question holeeray, but anyone know if the tires are supposed to be spinning faster than the car is moving, in a launch? in other words, peeling out slightly? cuz i thought by physics, your supposed to accelerate a car right before the tires are peeling out for maximum acceleration. but im guessing launching a car (along that the evo is awd) will be sltightly different? 
Last edited by Enyth; Dec 14, 2004 at 12:14 PM.
