Launching an RB car at the track..

[240z4u]

Alright, I likely should have put this elsewhere but I had one hell of a time getting out of the hole with my S14 last night. To make it worse, I was actually spinning the tires in 2nd and sometimes 3rd!

I could NOT get the damn tires to spin, the track was extremely well prepped and I was running 255/50/16 ET street radials.

I tried to slip the clutch and hammer it a bit but never had ANY luck. I sure as hell am not gonna just sidestep the clutch, I don't wanna be replacing axles.

Those who race, any tips besides a 2 step?

I ran a best of 13.15 while constantly putting i/c pipes back on. It didn't go too smoothly LOL. If I could get my 60' down to a 1.8 or so vs. my 2.25 I would have been in the mid 12s (my goal for the night).

Evan

[ANVIL]

i launch at about 5k and i just feather the clutch, and just adjust how much throttle you give. at my track i cant floor 1st gear for the most part. i guess you just have to keep practicing until you get the feel for it.

what was your trap speed on your best run?

[240z4u]

The problem I am having is that I can't slip this clutch very well. It feels like a lightswitch on the street too, I am wondering if something is funky with my tune and its causing me to lose low end tq. I am sure its a combo of things.

I only got a couple of clean passes in, bogging hard out of the hole. Also something is wierd shifting into 3rd, car falls on its face and literally stops accellerating for a second. Tune problem, surely.

Best time 13.15 @113 with a 2.2 60'

Evan

[jdmser]

wow, deja vu

zerothread?id=359162

[240z4u]

wow, deja vu

zerothread?id=359162

I remember that thread, good ideas in there. I will check it out. I almost have a set of LS6 coils in my hands as we speak.

Suggestions on getting outta the hole better?

Evan

[jdmser]

Probably not what your looking for but, it worked for me. It took at least two tenths off my 60' on street tires.

[240z4u]

Sweet nitrous setup, last thing I need is more crap in my car LOL.

I would rather do a 2 stage, but don't think a good heap o nitrous didnt come to mind HAHA.

Evan

[jdmser]

I'm also thinking of going with a different clutch this time around. I have one of the early XTD stage 3's. It's just how your's is, either on or off. I'm thinking copper/ceramic may be good for road course but, I need something with more of the properties of an organic for the strip.

[Cjmartz2k]

Wow, I wish I had that problem. I spin all the way through second on 275 nitto's over here. Coral asphalt sucks. I'd kill for a couple of runs down a stateside prepped track.

[mott6904]

yea im having a hard time taking off with out bogging. I went from a stock to hyper single and this thing is completly different. It's a ***** trying to slip it right, it just grabs so much more. I was also thinking about using a small shot of nitrous to help get the turbo spooled up faster.

[Shocker]

If your bogging, quick slip higher in the RPM band. Soft rear suspension will help, I could never do better than 1.8 with my megan coilovers. Just couldn't get the weight transfer.

[240z4u]

If your bogging, quick slip higher in the RPM band. Soft rear suspension will help, I could never do better than 1.8 with my megan coilovers. Just couldn't get the weight transfer.

I would kill for a 1.8. Ill soften up my coils completely next time I am at the track. I guess its just practice!

Thanks guys.

Evan

BTW, I haven't heard anything good about 275 nittos either. Are they DR's or the street tires? I blow 275 street tires off through three gears on the track.

[Kansei240sx]

Get drag radials, stock rear suspension, and urethane subframe bushings.

[rb25drag]

Well I have figured out you can not launch the Rb perfect!!

What kind of pressure was you running in your tires? If you was hooking too much add some tire pressure. You want the tire to slip about 2 rotations before actually hooking. It keeps your motor from bogging.

Also doing a less burnout would help.

I don't know why you guys are having such problems at the track, at my worse I cut 1.9 60ft's Spinning HARD!!

With it barely rotating the tires I have went the best of 1.67 60FT, And that was with 8psi in the rear tires.

What is you suspension setup?

I have a Exedy Stage 4 Twin Disk clutch, Mine is as hard as it comes, There is no slipping it.

[cb_240]

i've really gotta learn to drive i guess

i was getting 2.2 60's and best quarter mile was a 14.7 at 96 mph. car seemed to be running right i just couldn't get traction to save my life, was dropping the clutch at what i figured was about 4k rpm (no tach) and i was just spinning. mind you this was my first time ever running a car down the 1/4

[240z4u]

Well I have figured out you can not launch the Rb perfect!!

What kind of pressure was you running in your tires? If you was hooking too much add some tire pressure. You want the tire to slip about 2 rotations before actually hooking. It keeps your motor from bogging.

Also doing a less burnout would help.

I don't know why you guys are having such problems at the track, at my worse I cut 1.9 60ft's Spinning HARD!!

With it barely rotating the tires I have went the best of 1.67 60FT, And that was with 8psi in the rear tires.

What is you suspension setup?

I have a Exedy Stage 4 Twin Disk clutch, Mine is as hard as it comes, There is no slipping it.

Suspension is coilovers

Aren't you using a launch control?

What RPM are you launching at? I seriously doubt you could spin your tires that hard off the line with these tires and this track prep.

Evan

[rb25drag]

I do have a launch control now, But I was still cutting 1.6--1.8 60's without it.

Are you holding the motor at a steady rpm? If so Stop LOL I found it likes to bog bad if you do. It likes it if you rev it from 4k-5500, Try feathering the throttle at launch and see if it doesnt pick up quicker. Mine seemed too pick up alot by doing that before I installed the launch control.

I leave at 5500RPM off the launch control now @ 8-10PSI, But I been having a few problems myself so the best 60ft on the launch control is 1.62, I should get a 1.5 when I get a few bugs worked out.

I run at a track they call House of Hook!! It is no joke when it comes to launching, Thats why I have busted a Few sets of axles. You just need to play with tire pressure and also play with your launches a little more.

The Coilovers is whats Causing your Spinning in 2nd and 3rd, If you think about it at launch your getting the weight transfered to the rear wheels due to the shock of the launch then once moving your coilovers dont allow as much flex and when you hit 2nd its not got the rear end planted as much and causing it to spin. I run on Tein lowering springs and Stock Struts now. They seem to work the best for me. Gets the weight transfered alot.

[240z4u]

I do have a launch control now, But I was still cutting 1.6--1.8 60's without it.

Are you holding the motor at a steady rpm? If so Stop LOL I found it likes to bog bad if you do. It likes it if you rev it from 4k-5500, Try feathering the throttle at launch and see if it doesnt pick up quicker. Mine seemed too pick up alot by doing that before I installed the launch control.

I leave at 5500RPM off the launch control now @ 8-10PSI, But I been having a few problems myself so the best 60ft on the launch control is 1.62, I should get a 1.5 when I get a few bugs worked out.

I run at a track they call House of Hook!! It is no joke when it comes to launching, Thats why I have busted a Few sets of axles. You just need to play with tire pressure and also play with your launches a little more.

The Coilovers is whats Causing your Spinning in 2nd and 3rd, If you think about it at launch your getting the weight transfered to the rear wheels due to the shock of the launch then once moving your coilovers dont allow as much flex and when you hit 2nd its not got the rear end planted as much and causing it to spin. I run on Tein lowering springs and Stock Struts now. They seem to work the best for me. Gets the weight transfered alot.

Alright! Now those are some good tips.

House of hook? sounds like a good place to get teh herp! The track I was at is where AMS set another world record the night before. 8.something. It was like freaking glue.

Thanks man, makes a bit of sense now.

Evan

[l0nestar]

Alright! Now those are some good tips.

House of hook? sounds like a good place to get teh herp! The track I was at is where AMS set another world record the night before. 8.something. It was like freaking glue.

Thanks man, makes a bit of sense now.

Evan

Here is a good tip. LEARN TO DRIVE! ***-bag.

[240z4u]

I hate you guys LOL

[Darius]

Hey sometimes its tough love in the RB Forum. Get used to it Sally! LOL jk man I can't drag race for crap

[HxC_Nismo]

what i did when i didnt have a stutter box i brake boosted off the line by pulling up the e-brake and slipping the clutch enough to build some boost and i am able to cut 1.8 60ft by doing that without a 2 step and stock suspension. but you should be able to run 12.2-12.4 with a 1.8 60ft with your trap speed.

[rb25drag]

Ya house of hook is the tracks nickname. Its actually I-40dragway, Tim lynch runs down here pretty often!!

Not sure how other tracks prep, But here they Spray the lanes down with glue, Then come back with torches and heat it up!! If your walking on the track in sandals, You will prob loose them lol, Its Extremely sticky.

LOL I don't recommend the ebrake theory unless you wanna buy a Clutch SOON!! HAHA, Hope you left some cool down time between each round?

Also do you do a 1st gear burn out?

[240z4u]

I was not doing a 1st gear burnout, didn't think I needed to because it was hooking up and bogging.

Thoughts?

This thread has become shockingly very good LOL.

Evan

[rb25drag]

HAHA No need for a first gear burnout. Just making sure.

I always pull it into 2nd, set my line lock and let it rip

Here is a Video of mine, Burnout box and launch, I had my tires set at 8PSI on stock Suspension, 10lbs of boost off launch control and 15lbs up top. Listen to the tires Squeal, I spun pretty good out of the whole, But still managed a 1.62 60ft. Might or might not help you.

[BoostFab]

definitely work on feathering it abit, it will help with the bogging and saving a few axles from breaking. that's why i'm upgrading mine to z32 TT axles and the q45 diff--it's more stout and it can withstand a good beating.

[HxC_Nismo]

the e-brake does work but it does ruin sprung clutches, cause i am on my second clutch and thats why i bought a gizzmo launch interface so i didnt have to do that but building boost off the line or n20 spray out of the whole is the key to get a good launch with an rb. i usually launch my car at 5500rpm with my 2 step and cut 1.8 60ft with 14 tire psi in my et street radials. and i ran 12.2 @ 114mph on my stock twins at 15psi. but i have not been to the track with my hks turbos yet and i hope to hit low 11s or even 10s

[rb25drag]

the e-brake does work but it does ruin sprung clutches, cause i am on my second clutch and thats why i bought a gizzmo launch interface so i didnt have to do that but building boost off the line or n20 spray out of the whole is the key to get a good launch with an rb. i usually launch my car at 5500rpm with my 2 step and cut 1.8 60ft with 14 tire psi in my et street radials. and i ran 12.2 @ 114mph on my stock twins at 15psi. but i have not been to the track with my hks turbos yet and i hope to hit low 11s or even 10s

How much boost are you running now?

[WhatsADSM]

Yea, sounds like for you, you will want to give it more RPM when you let out and concentrate on slipping it *just* the right amount.

I would KILL for some traction. Last time out I was skating all the way through second on my 285 nitto DRs... Although honestly 18" DRs act a lot more like sticky street tires than DRs due to the lack of sidewall. I think my best 60' was like a 2.1 or something, and I could only get a 12.2 at 123 or so.

[240z4u]

Yea, sounds like for you, you will want to give it more RPM when you let out and concentrate on slipping it *just* the right amount.

I would KILL for some traction. Last time out I was skating all the way through second on my 285 nitto DRs... Although honestly 18" DRs act a lot more like sticky street tires than DRs due to the lack of sidewall. I think my best 60' was like a 2.1 or something, and I could only get a 12.2 at 123 or so.

Well, I ran 275 sticky perellis (sp?) on the track with miserable results. I was spinning through 3rd! Freaking tires felt like grease.

Next time I head out there, Ill try to get connected with you. Your welcome to try making a pass on my ET streets if you wanna try them out.

Evan

BTW; My LS6 coils should be here tomorrow.