My friend has a car with a h22 making 600+ WHP on race gas. How should he go about launching with a clutch masters dual disk clutch? He has stock axles and slicks. How should he launch so he doesnt break axles? He also has a quaife LSD.

 

I kept my tire pressure high to save the drivetrain but I still broke the stock diff.
I spun all of first but I somehow managed to run a 10.4

 

preload the drivetrain?

 

Yup, preload the drivetrain and slip the clutch until you feel your moving fast enough to hook. Just takes practice and experience.

 

So meaning he just holds the e brake high enough so you pull out the clutch and it hunches forward but not enough to trip the lights, then at the third yellow you just let out the rest of the clutch since my friend has a 2 step rev limiter?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">So meaning he just holds the e brake high enough so you pull out the clutch and it hunches forward but not enough to trip the lights, then at the third yellow you just let out the rest of the clutch since my friend has a 2 step rev limiter? </TD></TR></TABLE>

Yep

 

So is he suppose to pull the ebrake to its max or just a little? And im guessing when he launches off he should(after he catches traction) pull down the ebrake right?

Interesting. I used to do this from intuition on my old prelude except with out the ebrake on. I would hold RPMS steady and when it was time to launch just slide out the clutch and modulate the gas. I pulled constant 2.1 and 2.2 60 fts on shitty *** tires.

 

Release the clutch just enough to where the car wants to creep forward, apply the e-brake so that the car cannot move forward. This puts load on the transmission so the gears don't "smack" into engagement. Stage the car as you normally would using the 2-step or whatever. When you are ready to launch drop the e-brake simultaneously to letting the clutch out.

 

Would this be the same as if in a N/A race car pushing good numbers?

Also on another note, what size of slicks would you reccomend for a car running this type of power? I also heard that with the right size slicks you wont break your axles.

 

Preload and slip, slip, slip!

Otherwise, invest in some axles and launch that sumabish!

 

Just launch the sh*t out of it, if it breaks an axle replace it. If your going to stress the motor by racing it, you might as well make a complete pass. Turbo cars don't like to be pussed off the line, especially with a twin disc. My .02

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kwuaymaikrup &raquo;</TD></TR><TR><TD CLASS="quote">Release the clutch just enough to where the car wants to creep forward, apply the e-brake so that the car cannot move forward. This puts load on the transmission so the gears don't "smack" into engagement. Stage the car as you normally would using the 2-step or whatever. When you are ready to launch drop the e-brake simultaneously to letting the clutch out. </TD></TR></TABLE>

i do the same thing except i dont apply the e-brake. i apply just enough clutch so the car doesnt move...

 

tell your friend to invest in a gear based boost controller. it will make traction in the lower gears better by reducing boost and thus horsepower, which means less wheel spin.

 

I think he already has that, but with that said how much should he boost to catch traction in each gear? Could he still pop out the hole like a monster on 10lbs in first gear? He's making 600ish at like 30lbs which.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">I think he already has that, but with that said how much should he boost to catch traction in each gear? Could he still pop out the hole like a monster on 10lbs in first gear? He's making 600ish at like 30lbs which. </TD></TR></TABLE>

From here on out it is going to be trial and error. What works well for some is terrible for others. Try the methods described above and that wil give you a very good bassis to start trying new things. There is only so much that can be learned through a computer Good luck and go lay down some 10's

 

The thing is the power is on a heavier car then a civic. Still in the honda family though. 10s would be awsome.

Thanks again, you've been alot of help.

 

shocking the tires is not getting you down the track faster.

 

with that much power you have to feather the clutch untill it goes fast enought to grab it fully. my good friend has a 600 whp b18c1 in his race car and he still using stock axles, and they are about 4 yrs old, thats no bull. he just recentlly switched to stage 3 axles cuz he wanted to brake some personal records and wanted to make sure that he will be good to go and no worries. 98ctr

btw im running 400 whp and I been running stock axles with a 11.6 1/4 @ 125 mph.

 

With that said, are you running a dual disk clutch or is your friend? I was told that 'preloading the drivetrain' could cause serious damage to someone who uses a dual disk clutch.

 

I use a Tilton twin. Didn't get much practice this year but next season it will be in full effect. With patience and a little concentration I think you will get launching down fairly well.

 

Sounds good thanks for all the help.

 

Im using a ACT with a street disk and my friend is using a Excede Multy disk. 98ctr

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TGARCIARACING &raquo;</TD></TR><TR><TD CLASS="quote">Just launch the sh*t out of it, if it breaks an axle replace it. If your going to stress the motor by racing it, you might as well make a complete pass. Turbo cars don't like to be pussed off the line, especially with a twin disc. My .02</TD></TR></TABLE>


not to start anything. but before you go telling people "launch the **** out of it" please step back and take notice to how the bothwell motorsports sunfire comes out of the hole, as compared to other racers in the "hotrod class". the car is probably the smoothest car ive seen coming out of the hole, as well as during shifts. there is a fine line we walk when we drag race.

 

They probably don't run a twin disc clutch with a Honda tranny either. Apples and oranges. I don't expect everyone to agree with me, or with how I drive. I only recommend what I know from my own personal experiences on the track.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">


not to start anything. but before you go telling people "launch the **** out of it" please step back and take notice to how the bothwell motorsports sunfire comes out of the hole, as compared to other racers in the "hotrod class". the car is probably the smoothest car ive seen coming out of the hole, as well as during shifts. there is a fine line we walk when we drag race. </TD></TR></TABLE>

Its because it has a Slipper Clutch and an Xtrac.. Of course is going to be smooth.. Now go launch the **** out of it