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Drag Time Register

Started by _CHOPPER_ , Mar 21 2006 06:19 PM

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175 replies to this topic

#51 _SSHatch_

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Posted 29 November 2006 - 07:33 PM

Name: PJ

Car: SS Torana Hatch

Engine: 350 Chev

Transmission: Saginaw 4speed Manual

Diff: Ford 9-Inch LSD 2.72:1ratio

Reaction: 0.840
Sixty: 2.106
E.T: 13.281
M.P.H: 106.76
K.P.H: 171.80

Motors ACDelco Dragway Tasmania
Commodore Car Club Private Day II
Saturday 25th November, 2006

finally got to run on some semi decent rubber! YOKY A008R Tyres. They had not been on a car in over 4 years.
and I should maybe add that I had a slipping clutch all day as well.
Damn sticky tyres that ruin other stuff
Posted Image

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#52 Tiny

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Posted 29 November 2006 - 07:37 PM

Updated! Nice little gain! But sadly didnt move a spot!!

So this means a new clutch to counteract the added grip now!?

Cheers :spoton:

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#53 _SSHatch_

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Posted 29 November 2006 - 07:57 PM

Correct!
Just looking into a setup that will hold up to the launch's but still be usable everyday. I know I have to makes compromises but so be it. I still drive it to work everyday and drop the kids at school and stuff.
So thinkin a billet flywheel, sprung center button clutch and hopefully a decent pressure plate with billet face.
Should add that the current Clutch & P/Plate is a standard Holden 308 one with a slightly modified P/Plate to give it a bit extra clamping pressure. Just changed the baulk ring thingy.

Am pushing hard now to dip into the 12's with the 2.72:1 ratio and still in full street trim, stereo and all, on street legal tyres!

Edited by SSHatch, 29 November 2006 - 07:59 PM.

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#54 Tiny

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Posted 29 November 2006 - 08:17 PM

Sounds like a plan mate! So CLose!! SO close!

It's an awesome feeling when you do crack a 12 in street trim! Best of luck to ya!

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#55 Gump

Paisty White

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Name:Russell
Location:Bridgetown WA
Car:LX SL hatch
Joined: 15-November 05

Posted 30 November 2006 - 04:13 PM

do you need a pretty hypo combo to hit 12's

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#56 _SSHatch_

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Posted 30 November 2006 - 05:17 PM

What do ya call a Hypo combo??

I wouldnt say that mine is that over the top and its more than capable of getting there!
Its more the idiot behind the wheel holding it back.
And no that does not open the doors to you all offering to show me how its done. :tease:

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#57 _HatchmanSS76_

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Posted 01 December 2006 - 12:13 AM

do you need a pretty hypo combo to hit 12's

Gearing has more of an influence than going crazy on the donk.
You can have what is considered as a mild 308 with the right gearing and get into the 12's no probs.

308, Crane 286 cam, L34 spec heads, electronic ignition, 4 barrel carb tuned with 3:9 or 4:11 gears in the rear will see you there easy. Even 3:5's if your motors tuned well could do it.

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#58 _gtrtorana_

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Posted 01 December 2006 - 11:13 PM

This is my best time so far. (Hope to go faster next time, but so does everyone who racers)
Car: LJ Torana coupe
Engine: 202
Transmission: M20 4 speed Manual
Diff: 3.55:1 LSD Banjo
Reaction: 0.64815
Sixty: 2.2097
E.T: 14.7912
M.P.H: 91.61

Posted Image

I am 314 in the right lane. Since this run, I have had head off and personaly spent 8 hours porting head. I have also added roller rockers so I hope to be around the 14.5 mark next time on the 1/4. Tiny, can you plaese add this time to the register. Thanks

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#59 Tiny

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Posted 02 December 2006 - 09:09 AM

Updated!

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#60 _OLC383_

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Posted 11 February 2007 - 12:39 PM

10.629 @ 128.19mph 60ft 1.534 full street trim (2815lb with driver) naturally asspirated LC 2door

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#61 _NVMYLH_

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Posted 05 May 2007 - 01:04 AM

Just got back from calder tonight. first time out with the rb30et.

Car: LH torana (now 1320kg with new motor+trans)
Engine: rb30et (8-9psi, 450x300intercooler, standard everything else!)
Transmission: rb25det manual
Diff: 3.5:1 9" (single spinner, LSD should be here anytime!)
Reaction: 1.053
Sixty: 2.252
E.T: 13.81
M.P.H: 101.68
Tyres: 225/50r15 sumitomos

Posted Image

This helped a little too! Boosts much quicker! I ran 13.87 on the very first run, then a 14, 15.0 (bad wheel spin!) then finally 13.81, still finding the best launch! fine line between bogging down or lighting the tyres up!

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#62 knoath

far.... FAR

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Location:Melbourne, Northern Subs
Joined: 09-November 05

Posted 05 May 2007 - 08:32 AM

Good stuff Craig!
What do you reckon it'll do when it's got the 9" under there?

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#63 _NVMYLH_

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Posted 05 May 2007 - 09:20 AM

Not real sure how much the LSD will help, but i reckon with a bit more practice i could have run a 13.5 or something close. that run i reckon i slipped the clutch too far, should have got off it quicker. felt a bit slow but still did 13.8. Just need to get 60ft times done a bit.

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#64 warrenm

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Location:Central West NSW
Car:1972 LJ Torana
Joined: 08-November 05

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Posted 01 June 2007 - 10:02 AM

This time card is from the Bracket Attack Final at the WSID last Saturday 26/5/07. I made it through to the final & took the win in Street Fighter. Thats me in the left lane.
Warrenm LJ 2 door
204cu
Triple SUs
4 speed Muncie
MT drag Radials

Posted Image

Edited by warrenm, 01 June 2007 - 10:03 AM.

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#65 _TORANR AMORE_

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Posted 26 June 2007 - 08:19 PM

Hey Tiny, can you bump me up the ladder on the Drag Time Register please?

12.49 @ 117.10 MPH

Posted Image

Now that I'm catching up to ya, you may as well change yours too,

Cheers,
Rick.

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#66 Struggler

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Location:Canberra A.C.T.
Car:UC Sedan
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Posted 27 June 2007 - 07:58 AM

There is something seriously wrong with the terminal MPH in the right lane. On the first time slip you are 1.5 mph slower than your opponent at half track, then at the end of the track you are 5 mph faster, despite the fact that he ET'd better ????? The second slip is similar. I reckon the MPH should be around 110 on your 12.4 pass and 108 or 109 on the 12.6 pass.

Are you using N2O on the second half of the track only ?

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#67 _TORANASS_

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Posted 27 June 2007 - 04:50 PM

No Struggler no NOS, i was there that day and the car was avaraging that mph all day, im pretty sure he did the same numbers in the left lane.

Rick check you left lane timeslips.

John

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#68 _TORANR AMORE_

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Posted 27 June 2007 - 11:48 PM

Yep, I got 166MPH in the left lane at one stage.

No NOS, but I did race change 3rd and 4th (I didn�t do 2nd as I was losing traction) and gave it a bit more further down the track.
I really hadn't had much practice or even driving time with the car up to that day as I only just got it ready the night before and only had an hour or two sleep, so maybe I was stuffing up through 1st and 2nd up to half track, I was definitely losing up to a potential second in the first 60ft.

I also did a couple of dozen runs that day, with a GTECH on board which produced similar results, and the GTECH has never been wrong before.

http://www.ausmuscle...p?p=11547#11547

Struggler, you most likely already know all this anyway, so I don't mean to bore you, but because a few other people were confused about it, I�m gonna try to explain it. So here goes�

One thing you must remember is that the increase in velocity (acceleration) is not linear, it�s a curve and it�s by no means a nice pure curve, it is in most cases an irregular curve.
More irregular due to the car being a manual and I was suffering from a fair bit of traction loss and really only managed to get the thing up to boogie after the first half of the track anyway.

If you try to think of this linearly it wont make any sense.
A simple plot of the results in Excel using its chart function gives you this:

Posted Image

And Excel will try its best to create a natural curve. But in the real world there are irregularities in the real curve, ie changing gear etc.

In a graph of Speed vs Time the area under the graph is always the distance, as Distance = Velocity x Time
In this graph, the pink line (the Right Lane) will have more area under it and thus to achieve its 117MPH it would have had to travel further than the blue (Left Lane)

Posted Image

But the real graph would be something like this, with a few points slightly shifted, because it wont be a nice perfect curve like the computer will calculate.
In which case, you�ll find that the areas under both curves will be equal and thus both cars travelled the same distance, but got there via different rates of changing speed.

Posted Image

Cheers,
Rick.

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#69 _TORANR AMORE_

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Posted 01 July 2007 - 01:59 PM

Yep, I got 166MPH in the left lane at one stage....

Ooops, that was meant to say 116MPH

Typo.

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#70 _LEE_

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Posted 14 August 2007 - 05:09 PM

User name : LEE
Vehicle type : LJ 4 door S
Engine size : 308
Which time is yours : left

Posted Image

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#71 Tiny

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Posted 14 August 2007 - 07:29 PM

Updated to add LEE,

Could you please PM me to update the register as i've forgotten to look through this thread lately!!

Cheers

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#72 _v8slrtorana_

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Posted 19 August 2007 - 10:19 AM

User name : v8slrtorana
Vehicle type : LH SLR5000
Engine size : meat pie 355
Which time is yours : left (right was a 496 BB HQ ute)
Never raced at a race track before.
Drove the car to the track, dropped the exhaust, used street tyres and pump fuel, no gas.
I got a total of 4 runs in, keep dropping the dial in times down and broke out every race. oh well
Posted Image

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#73 _timbotorrie_

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Posted 09 September 2007 - 08:05 PM

User name: timbotorrie
Vehicle type: LH
Engine size in cubic inches: 308
Which time is yours: LEFT

left the line a bit early but it felt good so i kept my boot into it and ran PB for the day!

Posted Image

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#74 Tiny

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Posted 09 September 2007 - 08:12 PM

Thanks Timbo, Got your PM!

As i mentioned to Tmbo in my PM, I've lost all data from my computer, so ive got to try and get the drag time register back off the internet and update that. Please bare with me for a while as i get my software back up and running to do it all!

CHeers