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-   -   1/4 mile racing, how to get sub 13s ? (https://www.scoobynet.com/general-technical-10/882943-1-4-mile-racing-how-to-get-sub-13s.html)

TonyBurns 05 April 2011 02:32 PM


Originally Posted by stef_2010 (Post 9972482)
How did you know that ?

I was speaking to him and he showed me about the car and thats what its running, he onl got me by a car length aswell :)

It said it after you both set off ;)

Tony:D

banny sti 05 April 2011 02:37 PM


Originally Posted by stef_2010 (Post 9972530)
harder or softer ?

Just now fronts = 30psi

Rear = 28psi

Also, DCCD settings

i've tried launching on full lock the slipping it all the way back and also just going for it with an open diff from the start and cant say I noticed too much of a difference tbh

Although my best 60ft time may have come with the run on locked diff

DCCD I would go with locked as it will reduce traction loss and as for tyre pressures try both see what you gain/lose time wise but softer is generally better.

bigsinky 05 April 2011 02:54 PM


Originally Posted by stef_2010 (Post 9972528)
I meant that since I dont need to go when the light goes green i can wait 2 seconds to make sure I get a perfect launch which would give me a 2 second reaction time

2.4 seconds but essentially yes


Originally Posted by stef_2010 (Post 9972528)
What do you mean by any faster than 0.4 and I'll red light ?

if you have a reaction time greater than 0.4 seconds you have broke the beam before the green light and you are automatically red lighted.


Originally Posted by stef_2010 (Post 9972528)
My reaction times were all 0.4-0.55 except for one run I did

nothing wrong with those times


Originally Posted by stef_2010 (Post 9972528)
My 0-60 time was 1.9, which looks like it needs work as with my lighter, shorter geared car i really should be doing better it seems

do you mean your 60ft time? 0-60 in 1.9 would be fabulous, motorbike territory :) dont worry you will get used to the jargon. 1.9 60ft times are not bad. look at your slips were the 60ft times consistant? 10 runs with 1.9 60ft times would suggest your car wont go any better. fluctuating 60ft times means you need some work on your launch.

stef_2010 05 April 2011 03:17 PM


Originally Posted by bigsinky (Post 9972566)
do you mean your 60ft time? 0-60 in 1.9 would be fabulous, motorbike territory :) dont worry you will get used to the jargon. 1.9 60ft times are not bad. look at your slips were the 60ft times consistant? 10 runs with 1.9 60ft times would suggest your car wont go any better. fluctuating 60ft times means you need some work on your launch.

1.9 was my best 0-60ft time, the highest was 2 seconds

I raced a motorbike the other day on the 1/4 mile and got spanked :lol1: he even pulled of a wheely as he was pulling away !

maybe I need to be quicker of the clutch then ? as I hold it above the biting point for a majority of first gear as I feel anymore power going down and I'd wheel spin, maybe I'm wrong though :wonder:

Anyway, fuel pump + FPR + FMIC + injectors + map sound like a good idea ?

I'd like to have piece of mind knowing my engine is running safely rather than having it modded and still on standard managment or should i just map it and ignore the mods above, apart from the fueling and see how i get on with that ?

bigsinky 05 April 2011 06:17 PM


Originally Posted by stef_2010 (Post 9972618)

Anyway, fuel pump + FPR + FMIC + injectors + map sound like a good idea ?

I'd like to have piece of mind knowing my engine is running safely rather than having it modded and still on standard managment or should i just map it and ignore the mods above, apart from the fueling and see how i get on with that ?

for now i would just map it. a good mapper will squeeze a bit more out of the engine while retaining a safety margin. they might ask for a new fuel pump and FPR but then your injectors wont physically be able to pump more fuel. at that stage you need bigger injectors, then another remap. after that well............ its down to how much you want to spend.

Ciaran 05 April 2011 11:32 PM

Yes get yourself down to Andy Forrest and get mapped.

Crail is also very prone to a head wind which never helps.
I managed 11.68 at crail in a V2 sti with a forged 2.1 and a TD05 20g mapped for 10% Methanol.
It made a proved 340/333 at the weekend although i belive that figure may be a little on the low side.

The key is don't be scared to launch it i was launching anywhere between 5-6k revs. 0-60 ft time was 1.7.

scooby-tc 05 April 2011 11:36 PM

its all about the launch.Here is me in my standard (apart from nur spec exhaust) against a Noble M12

http://img.photobucket.com/albums/v1...h_usc05090.jpg

bigsinky 06 April 2011 07:52 AM


Originally Posted by Ciaran (Post 9973738)
I managed 11.68 at crail in a V2 sti with a forged 2.1 and a TD05 20g mapped for 10% Methanol.
It made a proved 340/333 at the weekend although i belive that figure may be a little on the low side.

yes it seems a bit low for me. that time would suggest the thick end of 400 hp. what where your teminal speeds like?

harvey 06 April 2011 06:54 PM


Originally Posted by stef_2010 (Post 9972407)
Hello :)

Looking for a bit of help improving my 1/4 times

Now I know my first task should be to tighten the nut behind the wheel, but even if it was extra tight theres no way my car could run the 1/4 mile in under 13 seconds imo

I have a V3 Type R. It currently has full exhaust inc decat, equal length headers, panel filter and boost gets raised to 1.2 bar when I do a run.

Its not been mapped yet so first on my shopping list is a simtek

I currently run a 13.5/13.6, cross the line at 104.5mph with a 0-60 foot time of 1.9 seconds, does this sound about right to everyone ?

Really looking for suggestions as to what else I should get along with the simtek to help me crack a high 12 second 1/4 mile

Thanks :)

Get the car as light as possible, no spare wheel, quarter of a tank of fuel or thereabouts but not so little fuel that you have issues with fuel pickup under hard accelleration. Little or no water in the screen wash. Only one tow eye front and rear. Remove unneccessary steel work under the car including the prop catcher.
Simtek ECU with launch and anti lag.
Experiment with launch RPM.
Experiment with tyre pressures.
You are aiming for a 60 foot time of 1.7 seconds or below. Every 10th of a second saved on the 60 foot will save two 10ths on the overall run so saving two 10ths will immediately reduce your time by four 10ths.
1.2 bar is relatively low and once the Simtek is properly mapped running around 1.4/1.45 bar you may be able to break in to 12 secs. If you map with octane booster or use methanol on map 2, 12 seconds is well within your capabilities with very little further work.

stef_2010 06 April 2011 08:39 PM


Originally Posted by harvey (Post 9974756)
Get the car as light as possible, no spare wheel, quarter of a tank of fuel or thereabouts but not so little fuel that you have issues with fuel pickup under hard accelleration. Little or no water in the screen wash. Only one tow eye front and rear. Remove unneccessary steel work under the car including the prop catcher.
Simtek ECU with launch and anti lag.
Experiment with launch RPM.
Experiment with tyre pressures.
You are aiming for a 60 foot time of 1.7 seconds or below. Every 10th of a second saved on the 60 foot will save two 10ths on the overall run so saving two 10ths will immediately reduce your time by four 10ths.
1.2 bar is relatively low and once the Simtek is properly mapped running around 1.4/1.45 bar you may be able to break in to 12 secs. If you map with octane booster or use methanol on map 2, 12 seconds is well within your capabilities with very little further work.

Thanks harvey Ill give it all a try

What un-neccessary metal work is there under the car :wonder:

Talking Dog 06 April 2011 08:47 PM

http://www.youtube.com/watch?v=ieOCb-vWVa4

I'm wanna hurl cash at my scooby or zcar hayabusain this game ... so I watched ... http://www.youtube.com/watch?v=ieOCb-vWVa4

stef_2010 06 April 2011 09:06 PM

[quote=Talking Dog;9974978]

I'm wanna hurl cash at my scooby or zcar hayabusain this game ... so I watched ./quote]

sorry I dont follow ? :wonder:

dazdavies 06 April 2011 09:18 PM

That calculator is pretty accurate to be fair.

Guestimate

Power at Flywheel (BHP) : 540
Weight without Driver (KG) : 1231
Power to Weight Ratio (BHP Per Ton) : 445.71
0 - 60 (Secs) : 2.86
0 - 100 (Secs) : 6.88
60 - 100 (Secs) : 4.02
Quarter Mile (Secs) : 11.32
Terminal Speed (MPH) : 128.26
Drag Strip Quarter Mile (Secs) : 10.92
Drag Strip Terminal Speed (MPH) : 132.78

Actual
http://www.scoob.co.uk/typer/dragrun...10-10-2010.jpg

Talking Dog 06 April 2011 09:29 PM

[quote=stef_2010;9975015]

Originally Posted by Talking Dog (Post 9974978)

I'm wanna hurl cash at my scooby or zcar hayabusain this game ... so I watched ./quote]

sorry I dont follow ? :wonder:


Most ppl judge the time from the aggressive launch.. When you watch those in the zone in their own game ... nailing the fininsh line come out with the best times ... sadly, EVO drivers appear to to have better clutches

bigsinky 06 April 2011 09:39 PM


Originally Posted by Talking Dog (Post 9975090)

nailing the fininsh line come out with the best times ...

if you have actually raced you will know good runs are made in the first 60ft


Originally Posted by Talking Dog (Post 9975090)
sadly, EVO drivers appear to to have better clutches

again what do you mean here. A bit of a general statement. An exedy twin or triple plate carbon will be miles better than an oem EVO clutch. They cost 10x the price so it's all relative

Talking Dog 06 April 2011 09:55 PM


Originally Posted by bigsinky (Post 9975117)
if you have actually raced you will know good runs are made in the first 60ft

(Of those whose green light )



again what do you mean here. A bit of a general statement. An exedy twin or triple plate carbon will be miles better than an oem EVO clutch. They cost 10x the price so it's all relative

Too many scoobies burning /over trying clutch control..

Talking Dog 06 April 2011 10:00 PM

[quote=bigsinky;9975117]if you have actually raced you will know good runs are made in the first 60ft



.. Of the green light or personal snap ???

stevebt 07 April 2011 12:07 AM

I always found 600bhp helped get me under 13 seconds but then my gear changes held me back from getting proper times as I'm sure bigsinky will agree ;) :D

stevebt 07 April 2011 12:09 AM


Originally Posted by bigsinky (Post 9975117)
if you have actually raced you will know good runs are made in the first 60ft



Of the few times I have done them I can nail a 1.6/1.7 but then its all downhill from there :D

Aztec Performance Ltd 07 April 2011 05:59 PM

MY99 UK with a dawes and exhaust was 13.4s first ever attempt. Probably around 260/270. Full weight, plus tools.

300 should see easy 12s.

I always race the car next to me and the clock - would be boring otherwise ;)

bigsinky 07 April 2011 07:12 PM


Originally Posted by stevebt (Post 9975470)
I always found 600bhp helped get me under 13 seconds but then my gear changes held me back from getting proper times as I'm sure bigsinky will agree ;) :D

Oh yes putting it all together is the hard part. Consistency is the key. I actually found it harder to get better times with more power.

mickywrx 07 April 2011 08:17 PM


Originally Posted by bigsinky (Post 9976534)
Consistency is the key.

That's one of my problems, getting some consistency.

Launch is very important, also not changing into 5th if you can avoid it when near the line.

At least I beat Stevebt though, I like racing my friends. :D

http://www.youtube.com/watch?v=UWr3k...er_profilepage

He'll twist about gear changes and all sorts, but, a wins a win. ;)

bigsinky 07 April 2011 10:07 PM


Originally Posted by mickywrx (Post 9976664)

Launch is very important, also not changing into 5th if you can avoid it when near the line.

;)

Some of us don't have a choice in shifting up to 5th. About 100 m before the 1/4

Jeem 07 April 2011 10:43 PM

You going to crail on the 17th stef 2010?

stef_2010 08 April 2011 10:35 AM

Yes i will be Jeem

Why do you want a race ? :lol1:

mickywrx 08 April 2011 04:20 PM


Originally Posted by bigsinky (Post 9976972)
Some of us don't have a choice in shifting up to 5th. About 100 m before the 1/4

Flash git's with 6 speed boxes. ;)

I was referring to 5 speeds, but wasn't clear. :thumb:

stevebt 08 April 2011 07:03 PM


Originally Posted by bigsinky (Post 9976972)
Some of us don't have a choice in shifting up to 5th. About 100 m before the 1/4


Yup and if I get higher terminals I will right on the redline of 5th :(

stevebt 08 April 2011 09:00 PM

Video removed! is that cause it shows you loosing :) Its the same car Micky with the same driver, your quite welcone to try and beat me this year if you want :)



Originally Posted by mickywrx (Post 9976664)
http://www.youtube.com/watch?v=UWr3k...er_profilepage

He'll twist about gear changes and all sorts, but, a wins a win. ;)


bigsinky 09 April 2011 05:26 AM


Originally Posted by stevebt (Post 9978260)
Video removed! is that cause it shows you loosing :) Its the same car Micky with the same driver, your quite welcone to try and beat me this year if you want :)

Ohhhhhhh thems fightin words all right

smc ste 10 April 2012 12:03 AM

im going for my first try on 22nd april at shakespeare stratford. any advice. tyre pressures and stuff? cheers guys :)


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