Best way to launch a Scooby on the 1/4?
23 February 2011, 03:41 PM
#1
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Thread Starter
Best way to launch a Scooby on the 1/4?
Hi guys need some advice on how to launch a scooby properly
Tried the 1/4 for the 1st time at the weeknd since my cars been finished & to be honest i was totally bollocks. On the road when my cars moving its a dream to drive with the power always on tap.
I dont have launch control & cant justify a simtek ecu.
So here's what i was doing
DIFF on the back setting last green & 2nd last green light as on auto was worse!
Holding the revs at 4000 lights go to green clutch out & go
all i seemed to get was the car bogging down
I can here you all the laughing now.
any advice would be appreciated
Cheers
Tried the 1/4 for the 1st time at the weeknd since my cars been finished & to be honest i was totally bollocks. On the road when my cars moving its a dream to drive with the power always on tap.
I dont have launch control & cant justify a simtek ecu.
So here's what i was doing
DIFF on the back setting last green & 2nd last green light as on auto was worse!
Holding the revs at 4000 lights go to green clutch out & go
all i seemed to get was the car bogging down
I can here you all the laughing now
.any advice would be appreciated
Cheers
23 February 2011, 04:36 PM
#6
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Launching a scoob this way has the potential to kill any of it.
I was very concerned about breaking it the first time I launched my car, but there is far less drama than you might think.
Let's face it if you're going to race any car it will break sooner or later.
I was very concerned about breaking it the first time I launched my car, but there is far less drama than you might think.
Let's face it if you're going to race any car it will break sooner or later.
23 February 2011, 04:43 PM
#7
The problem here is holding the revs. Think of how little throttle you have to hold the revs somewhere. Instead when you see the lights changing, then put your foot to the floor, and when you hit about 5krpm lift up the clutch. Then you've got the revs and the throttle to match.
Or just get launch control on your standard ECU
Or just get launch control on your standard ECU
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23 February 2011, 04:54 PM
#8
Contact Duncan at racedynamix! When he maps he installs launch control and flat foot shifting. Not used the launch control on mine yet as the clutch is slipping but the flat foot shifting is good. All on the standard ecu! Although I have other mods aswel.
Doug
Doug
23 February 2011, 05:31 PM
#9
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Thread Starter
cheers for the info guys my car is a newage running 396bhp been tuned by Andy F. Ive got an uprated 6 speed paddle clutch fitted so clutch should hopefully be fine just concerned about it heating up to much for the change into 2nd gear.
I was worried about killing my car so will try higher up the revs next time.
typical me i didnt think i could get launch control programmed on a standard ecu as my cars a type uk sti.
Thanks for the info
Scott
I was worried about killing my car so will try higher up the revs next time.
typical me i didnt think i could get launch control programmed on a standard ecu as my cars a type uk sti.
Thanks for the info
Scott
Last edited by Purdey; 23 February 2011 at 05:42 PM.
23 February 2011, 08:09 PM
#12
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Thread Starter
I think switchable launch control can only be done on the jdm sti.
As far as im aware Andy will only do launch control with the simtek ecu which i dont have.
Im not brave enough to side step my clutch
thanks for the info guys
23 February 2011, 08:16 PM
#13
Ah ok, I got the launch control with my open source map and never been brave enough to try it. But once my new clutch is in and bedded in I may give it a go. With the power your running you will have caught most things by 3rd gear anyway haha.
Doug
Doug
23 February 2011, 08:24 PM
#14
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You don't have to use 5500rpm to be able to launch a Newage cleanly!! If you know what you are doing and use some mechanical sympathy, you don't have side step your clutch either!
There is a bit more to this then meets the eye as there are a whole number of differing factors why you would need to use a specific rev limit for launching. Grip (Tyres, pressures, heat and surface to name but a few) is one of them.
There is a bit more to this then meets the eye as there are a whole number of differing factors why you would need to use a specific rev limit for launching. Grip (Tyres, pressures, heat and surface to name but a few) is one of them.
23 February 2011, 09:03 PM
#15
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You don't have to use 5500rpm to be able to launch a Newage cleanly!! If you know what you are doing and use some mechanical sympathy, you don't have side step your clutch either!
There is a bit more to this then meets the eye as there are a whole number of differing factors why you would need to use a specific rev limit for launching. Grip (Tyres, pressures, heat and surface to name but a few) is one of them.
There is a bit more to this then meets the eye as there are a whole number of differing factors why you would need to use a specific rev limit for launching. Grip (Tyres, pressures, heat and surface to name but a few) is one of them.
I tried many ways to get my car off the line cleanly without it bogging down, including 'driving' it off the line and using modest rpm and feeding the clutch.
The absolute best result I have found is to hold the rpm at 5500 and sharply engage the clutch.
This year may be slightly different as I have a Syvecs available with 3 different launch rpm settings installed so it will be interesting to see what is required.
As for knowing what I'm doing I spent 12 years running different cars in competition at the pod up to super gas level.
Mechanical sympathy I have in abundance coupled with a fear of wallet famine
23 February 2011, 09:18 PM
#16
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Thread Starter
To be honest Crail's start line is terrible and was covered in sand & gravel at the weekend dont think it was swept once all day
Again thanks for all the advice.
Now my brain is bursting with rev limits, side stepping & the impending bang folowed by divorce lol
Again thanks for all the advice.
Now my brain is bursting with rev limits, side stepping & the impending bang folowed by divorce lol
23 February 2011, 09:24 PM
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23 February 2011, 09:27 PM
#18
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In my eyes it is all about clutch and throttle control (something that not everyone can do well - although we all think we can).... assuming you are doing it all manually. The better you can do both in harmony, the better your launch can be unaided.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
23 February 2011, 09:28 PM
#19
In my eyes it is all about Simon de Banke doing clutch and throttle control (something that not everyone can do well - although we all think we can).... assuming you are doing it all manually. The better you can do both in harmony, the better your launch can be unaided.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
1bar of boost showing ...
24 February 2011, 09:55 AM
#23
Scooby Regular
Thread Starter
In my eyes it is all about clutch and throttle control (something that not everyone can do well - although we all think we can).... assuming you are doing it all manually. The better you can do both in harmony, the better your launch can be unaided.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
A car will naturally "bog", i.e. the revs drop, if you don't get on the gas well as you start to dis-engage the clutch. Slipping the clutch will help as I'm sure you are aware, and will not require monster revs. Obviously the harder the clutch or the "on" and "off" nature of the clutch, then the harder this can be to achieve.
I could quite comfortably launch my old 500+bhp Spec C with just over 4k revs, cleanly and every time, even with a twin plate clutch. When I was playing at the drag stuff with the standard engine at 370bhp, I could attain a 1.6s to 60ft time using the same method more often than not in the latter part of those dragging days. All of this without the need for LC.
The OP has a standardish car, going by his car profile, so I would suggest that with a bit more clutch and throttle control practice he should have fewer problems without the need for mega revs.
Ive updated my car spec now.
24 February 2011, 04:10 PM
#24
Never had the need for launch control and had no problems with consistence 1.6/1.7s 60ft launches.
You just have to nail the technique.
The idea on the launch is to get the wheels spinning the right amount. This can be a balance of the correct tyre pressure and revs. If you are still bogging down at 5500rpm I would try increasing the tyre pressure.
Whatever you do, don't do this or you'll soon be coming to us for a new clutch http://www.youtube.com/watch?v=ZR9Le5dcoDQ
A couple of reasonably clean launches:
In car: http://www.youtube.com/watch?v=xdF6KxJ1Xag
Outside: http://www.youtube.com/watch?v=owns-sY2Ou0
You just have to nail the technique.
The idea on the launch is to get the wheels spinning the right amount. This can be a balance of the correct tyre pressure and revs. If you are still bogging down at 5500rpm I would try increasing the tyre pressure.
Whatever you do, don't do this or you'll soon be coming to us for a new clutch
http://www.youtube.com/watch?v=ZR9Le5dcoDQA couple of reasonably clean launches:
In car: http://www.youtube.com/watch?v=xdF6KxJ1Xag
Outside: http://www.youtube.com/watch?v=owns-sY2Ou0
24 February 2011, 05:32 PM
#26
Scooby Regular
Thread Starter
Never had the need for launch control and had no problems with consistence 1.6/1.7s 60ft launches.
You just have to nail the technique.
The idea on the launch is to get the wheels spinning the right amount. This can be a balance of the correct tyre pressure and revs. If you are still bogging down at 5500rpm I would try increasing the tyre pressure.
Whatever you do, don't do this or you'll soon be coming to us for a new clutch http://www.youtube.com/watch?v=ZR9Le5dcoDQ
A couple of reasonably clean launches:
In car: http://www.youtube.com/watch?v=xdF6KxJ1Xag
Outside: http://www.youtube.com/watch?v=owns-sY2Ou0
You just have to nail the technique.
The idea on the launch is to get the wheels spinning the right amount. This can be a balance of the correct tyre pressure and revs. If you are still bogging down at 5500rpm I would try increasing the tyre pressure.
Whatever you do, don't do this or you'll soon be coming to us for a new clutch
http://www.youtube.com/watch?v=ZR9Le5dcoDQA couple of reasonably clean launches:
In car: http://www.youtube.com/watch?v=xdF6KxJ1Xag
Outside: http://www.youtube.com/watch?v=owns-sY2Ou0
24 February 2011, 05:52 PM
#28
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if its bogging increase the front tyre pressures so the front wheels slip a little on launch , this should help as its the front tyres gripping too much that causes the bogging.
