Jump to content
SAU Community

Recommended Posts

Hiya all - I wasn't really the bothered about going to a drag strip at 1st but now I've done a couple I'm really starting to get into it.

However, even though my car is 325rwhp I still can't get get lower than a 13.9 @ 104. My 60ft time is normally a 2.4/5 sec which is crap so what am I doing wrong?

Here's a Vid of 4 launches from my last drag day. My slowest time is 1st through to my fastest being last.

Clicky Clicky for the Vid

I've got Launch Control fitted (thats the rev limiter sound on the vids) set at 3100rpm to stop wheel spin and prevent bogging down.

At the moment I haven't got any suspension mods (other than lowering springs) as I don't really know what would be best as I use my car everyday so it can't be too hard/soft etc.

Cheers....................................................IanH

Link to comment
https://www.sau.com.au/forums/topic/41318-why-am-i-so-bad-at-launching-vids/
Share on other sites

  • Replies 41
  • Created
  • Last Reply

Top Posters In This Topic

Lower tyre pressure, better tyres, better rear suspension setup...these things usually lead to a better launch.

Also why dont you try and launch without traction control limiting your revs, will give you more control and more chance to find a perfect launch point.

Get a set of "pineapples" from "Dr_Drift" (or your local "Whiteline" workshop) on here. They will help the rear end squat better and put the power down smoother. I could notice the difference within the first 200m of driving (in a normal manner) on a public road after having these fitted. Will cost you about $180 fitted.

Launch control is a great idea but may i suggest learning how to get your car off the line without it first, then progressing through to using it once your 60' times are 2.2's at the slowest.

Adrian

  • 1 month later...
I remember driving my skyline on 11 psi, and I can tell you if I were driving a skyline on 1.2 bar I would be pulling at least flat 13's on my first go!!!

Easy to say, harder to do. Don't talk such total shit till you've done it and have the slips.

Adrian

launching at 3100rpm? I believe you should be launching higher than that particularly if are you running a non-standard turbo and it takes a higher amount of revs to really get spooling. :cheers:

From your video it looks as though it takes quite a few meters for your car before it starts accelerating, it should be scrambling for grip from the get go.

Hope this helps.

Yeah, Adrians right, you should try and master launches without the launch control on first.. Remembering that you may not be able to go full throttle until you hit second gear.

Watching the vid, it seems as though it's bogging down on the launch, then breaking into wheelspin at which stage it's either bouncing off of the rev limiter or the launch control rev limiter is still activated. Then by the sounds of it your gear changes are a tad on the slow side.

Practice makes perfect, and you've done the right thing by asking for advice.

Oh, try dropping your tyre presure too, simple to do and it may help.

Even though my car is making under 200rwkw I find it will wheel spin if I bog the launch down, it appears if I launch it hard and load up the tyres then it won't wheel spin as much only chirping the tyres through the gear.

I've always thought of it as being similiar to slamming on the brakes and feeding on the brakes.

Have you tried doing a little burnout before the launch?

Tyres and shift with a little more vigour :cheers:

Im interested to hear about the launch control as well.

lol at 2rismo, your not exactly shy about telling ppl what you think of there comments. Who cares if he has never run the 1/4? Hes allowed to hazard a guess as to what time he may do.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • It still combines inches with mm, especially when you have .5 inches involved, and mm and inches that can go in either direction. This would give a clear idea on both sides of the rim, right away, with no arithmetic. Even better if somebody gives you the dimensions of the arch of multiple cars. i.e GTR may be 125mm, a A80 Supra may be 117mm, or something along those lines. Yes, you can 'know' that going from a 10in rim to a 10.5in rim with the same offset moves both sides about 6mm, but you still have to 'know' that and do the math. Often it's combined. People are going from 9.5 +27 to 10.5 +15. You may do the math to know it, but if it was going from (I had to go look it up to be sure) 241mm/2 - 27 - 93.5mm from the center line to (more math) 266/2 - 15 (118mm) from the center line. Versus 93mm vs 118mm. It's right there. If you know you have a GTT with 100mm guards you can see right away that one is close to flush and the other absolutely won't work. And when someone says "Oh the GTR is 120mm" suddenly you see that the 10.5 +15 is about perfect. (or you go and buy rims with approximately 118mm outward guard space) I think it's safe to say that given one of the most common questions in all modified cars is "How do offsets work" and "How do I know if wheels will fit on my car" that this would be much simpler... Of course, nothing will really change and nobody is going to remanufacture wheels and ditch inches and offset based on this conversation :p We'll all go "18x9+30 will line up pretty close to the guards for a R34 GTT (84mm)" but 'pretty close' is still not really defined (it is now!) and if you really care you still have go measure. Yes it depends on camber and height and dynamic movement, but so do all wheels no matter what you measure it for.
    • But offsets are simple numbers. 8" wheel? Call it 200mm, near enough. +35 offset? OK, so that means the hub face is that far out from the wheel centreline. Which is 2s of mental arithmetic to get to 65mm to outer edge and 135mm to inner. It's hardly any more effort for any other wheel width or offset. As I said, I just close my eyes and can see a picture of the wheel when given the width and offset. That wouldn't help me trust that a marginal fitment would actually go in and clear everything, any more than the supposedly simple numbers you're talking about. I dunno. Maybe I just automatically do numbers.
    • Sure! But you at least have simple numbers instead of 8.5 inches +/mm, relative to your current rims you do maths with as well, and/or compare with OEM diameter, which you also need to know/research/confirm..
    • Uniclutch install vid, RB Track edition.   Highlight reel is very drive able, not noisy but still heavy with the clutch master he has.      
×
×
  • Create New...