Lets get my car into the 13's

[needfordspeed]

Had 4.11's in it before.

[Sundeep]

Ok forgive my ignorance, do 3.9's help it get off the line a bit quicker or does it help get across the track without hitting 4th or something??

Sundeep

[needfordspeed]

I'm guessing it was because it was too hard to launch off the line? I'm not too sure why he changed the diff ratio.

[2tufracing]

traction problems and a short 1st gear prob.. if traction isnt so much of an issue id be running smaller rims like 15" stockies 205/65/15's with low pressure around 15psi. 17"s are low profile and have too small a wall.

[Sundeep]

Yeah I reckon you're going to have a lot of fun trying to get it off the line. Only one to learn. I'd come up with you in the EA but my diff's going to blow for sure no doubt and you know my turbo gasket woes.

That, and my misaligned and cut and shut rear end is really bad now. It's completely ******.

Sundeep

[mcflux]

Oi Gilly, let us know how you feel with the 3.9s after friday. T5 1st gear + 3.9s give a *pretty* short launch (although OED666's ET says 3.9s are good :P), and if you feel like you need a slightly taller 1st gear, or want to hold 4th gear for that bit longer down the track (or even cross the line in 4th), fit some high profile (4wd-style?) stockies under the guards. A larger rolling diameter effectively makes the diff gearing seem taller.

For reference at Heathcote I was crossing the line in 3rd (1:1) at a touch over 5000rpm with 4.11s.

[sphell]

Hey Gill, I remember Hus saying back in the day that with 4.11s he had to change gears just before crossing the line, but with 3.9's it let him cross the 1/4 without that last gear change, improving his time.

[I6T5]

hey needfordspeed, i've got a mild EF and best time is 14.8 with a 2.01 60" if you can get the 60 ft time down to that you should run a very low 14. I've got 3.73:1 gears. Just experiment with your launches, and don't just dump the clutch give it some revs and ease it out otherwise it will just end up in wheel spin and you might hit the wall. lol

Goodluck, I might be out at calder on friday too, so I'll come introduce myself.

[Rollin]

Recipe for good 60ft times, according to Rollin

1: half decent tyres - those 235s should be ok.

2: Drop the pressures to about 25psi in the back, any lower and the center of the tyre doesn't contact the track and you loose contact patch. Pressures up to 40 at the front.

3: under 1/4 tank of good fuel

4: drive up to the water trough, stop with the back tyres nearly out of it.

5: out with the clutch and on the brakes, LOTS of rpm. Crawl forewards at walking pace and REALLY turn the tyres, for about a carlength or more, make sure you are well out of the water that other cars have pushed up onto the track, and really grinding that lovely VHT prepared surface into your tyres.

6: stop a little way from the start line and bring the revs up, and do one or two 'mini launches' to get a feel for how much grip the track has - it should be a fair bit if you have done a proper burnout and the track isn't wet.

7: stage as shallow as possible - crawl forewards and AS SOON as the second light comes on, stop.

8: bring the revs up - generally you will be able to use twice as many as on the street - I when my car was N/A I was near-dumping the clutch at 3500 and doing 1.9 60s, no traction problems on street tyres.

9: on the last yellow, let the clutch out hard as you smash the throttle to the floor. If you get it right the car shouldn't wheelspin or bog down much, just take off like a cat with a boot up its butt. (the nose of the diff might hit the floorpan if you are lucky)

10: don't lift very much on the 1-2 shift, pay a lot of attention to the 2-3, and flat shift 3-4.

The exact intricacies of step 9 depends on each car - Start at 3000rpm and let the clutch out quickly, if the car bogs, use more revs nect time, if you get wheelspin, let the clutch out a little slower, etc.

OED - you are soft! MORE REVS ON THE LAUNCH!

[Aaron_EF8]

Totally agree with what Rollin said.

Try doing some practice launches on a 'private road' so you can work out how well the clutch bites and practice throttle control to keep wheelspin to a minimum.

[Kenaz]

Originally Posted by needfordspeed

Now I need some tips

Throw the keys to Sunny or Damo? Those guys know how to shift :

Lol seriously mate, my advice is;

-Don't worry about the lights. They only start timing after you've moved off the line.
-Get plenty of heat into the tyres, but at the same time don't go nuts.

My only other advice would be in relation to racing an auto so I won't bother sharing that with you :P Good luck man, I wish i could come down and watch.

[Jason[98.EL]]

the cars previouse time "1/4 mile time 14.54 @ 98.2 mph 60' 2.189"

tip.... you have a bit to live up to

go quicker well done

go slower you have to go back to the drawing board

have fun

[needfordspeed]

Cheers guys, i've actually been practising a fair bit, I can launch it from about 3k RPM by easing the clutch out and I don't get too much wheelspin but it seems to me i'm launching it a bit too slow, I guess it's also a different story at the track too as it'd be alot more grippy.

Thanks for the tips Rollin! i'll have to memorise all that, should come in real handy!

[FPVWEPN]

AHH this should be interesting.....
Tips:
1st to second shift : take it easy or you will spin heaps
tyres @ 25-28psi
let us know how you go

[AUTickford]

U shouldnt run stock tyres at 12 psi thats silly and with stiff lowered suspension you have no hope, change the springs and get slicks. :sm_headba

[OED666]

Rollins launch tips I think should go in the Bible. That is exactly what I do.

I lower the pressures to 20psi (and i have chirped 4th on that pressure). I launched at 4000rpm when I did my 13.82.

BTW, I have had 4.11 diff gears since the middle of 2005, I had 3.9's before that, and I only managed a 14.7. I didnt have my launch technique sorted back then.

With 3.9's or 4.11's you will be doing above 4800rpm. You wont need 5th gear.

Below is a link that has 2 of my qtr runs, so you can see what I do.
http://video.google.com.au/videosearch?q=41tre

[needfordspeed]

Originally Posted by FPVWEPN

AHH this should be interesting.....
Tips:
1st to second shift : take it easy or you will spin heaps
tyres @ 25-28psi
let us know how you go

Should come down man, give the BA a run!

Originally Posted by OED666

Rollins launch tips I think should go in the Bible. That is exactly what I do.

I lower the pressures to 20psi (and i have chirped 4th on that pressure). I launched at 4000rpm when I did my 13.82.

BTW, I have had 4.11 diff gears since the middle of 2005, I had 3.9's before that, and I only managed a 14.7. I didnt have my launch technique sorted back then.

With 3.9's or 4.11's you will be doing above 4800rpm. You wont need 5th gear.

Below is a link that has 2 of my qtr runs, so you can see what I do.
http://video.google.com.au/videosearch?q=41tre

I need you or Rollin to drive it lol, hopefully I can get the launch down pat, cheers for the links I got a bit of and idea now, just need to get out there and give it a shot my self.

[Rollin]

Originally Posted by needfordspeed

I need you or Rollin to drive it lol, hopefully I can get the launch down pat, cheers for the links I got a bit of and idea now, just need to get out there and give it a shot my self.

Done! Where and when do you want me to be? haha.

Dunno about taking it easy on the 1-2 shift, though, I just smash it though and never had wheelspin problems, when when I did a 14.01....

If you are getting wheelspin, you aren't warming the tyres properly or on the right part of the track - you want to bake them on the racing line, where all the rubber is already down.

Do it right and you will be driving into the staging lanes after your run with little rocks and sticks getting thrown up into your rear guards, because your tyres will be really sticky.

[needfordspeed]

Well I guess the launch wasn't the problem! I got a best 60' of 2.041 which I think ain't bad at all for my first time out on the track!

Here are some details from the time slips:

First run:

60': 2.308
660':9.791 MPH:75.18

ET: 15.008
MPH: 95.15


Third run:

60': 2.041
660':9.552 MPH:74.59

ET: 14.835
MPH: 94.51


I think my gear changes weren't quick enough, I got a rip shifter and I think need to get used to it. For the last run I tried to flat shift it into 4th but didn't change quick enough and the revs went spastic and everything just went wrong lol (maybe that's why the MPH was lower than the first run?)

Anyways, need more tips guys! I wanna go out to the track again soon! What do you guys think I would have done wrong?

[Steady ED]

That MPH is good for Calder, 60' is good, probably just more practice!
Pretty good for a first time out.
With that mph I'd hazard a guess that there is a couple of tenths left in it.
If you can hack the long distance, Heathcote is the place to go for practice, get a bucketload of runs in.

[Jason[98.EL]]

good times there mate

considering all the reports about traction probs you should get into the low 14s easily with better traction

well done again

[webby_191189]

lower your tyre pressure to around 25 psi. Remove all loose stuff in the car that you can (spare tyre, subs ect) all rollins advice should make it good for you to

[mcflux]

So how far through 4th are you when you cross the line? (rpms)

[Rollin]

A 2 sec 60ft is pretty good, that MPH should see him into a 14.5 if the rest of the run is put together well.

For comparison, my fastest time was:

60ft = 1.942

660ft = 9.278@74.14mph

ET = 14.505@94.74mph

Looks like you have the launch pretty well sorted, now you just have to row it through the gears

[MADED-6]

wat do u recon i could get my car into i am bad at launching but and getting 2.4 60ft times but got a 15.4 at 94. something mph i think my car has the power i just couldnt get it to the ground i was spinning first not hugely then trying to **** really hard into 2nd but kept spinning second also. i had my tyres down to 27psi then i tried 20psi and still couldnt get grip wat do u think if i can get the grip and get good 60ft and not miss 3rd like i did 1 run i recon i can get into the 14's.
cheers josh.

[Aaron_EF8]

What tyres are you using? Diff? Trans? Suspension?

If you take 4 10th's off the 60ft time, you should be able to get 8 10ths off the ET, which makes 14.6.

Going somewhere like Heathcote and practicing using different techniques is the best place to get a feel for the car and measure times.

[mcflux]

94mph? That's definitely a high 14 assuming correct launch & not missing a gear.

I got a 14.78 with 91.48mph.

*EDIT* Well, echoing what Aaron_FE2 said above, other factors come in to play, but your mph suggests a high 14 is possible.

[Steady ED]

Don't compare Calder and Heathcote trap speeds either, Heathcote seems to get higher trap speeds for some reason.

[MADED-6]

i will open another thread dont want to hijack this one.
cheers josh.

[Rollin]

Man I already listed all the things you have to do to rip out a great time...check page two!