Best Launch method
03 September 2012, 10:44 PM
#33
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I've done 32 launches in my Ra at pod on a standard clutch with no problems with 1.1 bar boost on a TD05 16g launching at 6000rpm with a 60ft of 1.733 1/4mile 12.7 @ 104mph
04 September 2012, 01:21 AM
#34
Full throttle blips to hold 3.5k will get the turbo spinning more so when you do lift the clutch, there will be more boost a lot sooner.
04 September 2012, 01:18 PM
#36
Holding steady revs is pointless without slipping the clutch.
Rev and rev it hard and then pull up the clutch with a bit of slip. The engine will be loaded so won't bog down and you'll be off!
Or use launch control which may actually launch the car too hard, and spin up the wheels.
Rev and rev it hard and then pull up the clutch with a bit of slip. The engine will be loaded so won't bog down and you'll be off!
Or use launch control which may actually launch the car too hard, and spin up the wheels.
16 August 2013, 03:34 PM
#37
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Its all about timing; holding the clutch at biting point just long enough to get the boost to build up a little, then letting it up completely just as it kicks in. Too slow and you get lots of slip and a funny smell. Too fast and not enough revs/boost and you'll just bog down. Too fast with too many revs just gives too much wheelspin.
Here's how I do it:
Rapid Full throttle blips to maintain the desired launch revs. RPM will depend on the turbo and 1st gear ratio. A UK TD04 with cats will be happy at 4K RPM. a TD05 or larger will need more revs.
Quickly bring clutch up to its bite point (you should already know where this is from driving in stop-start traffic
).
Hold the pedal just above that biting point for about the same time it takes to say 'elephant' aloud whilst giving the engine more throttle. Then bring the clutch up the rest of the way whilst flooring the throttle.
PS, I should get a launch vid up on youtube as there is alot of vids on there that don't seem to be able to launch properly.. and they change gear like a granny
I wonder if I can borrow my old Impreza back (still on the original clutch)
Here's how I do it:
Rapid Full throttle blips to maintain the desired launch revs. RPM will depend on the turbo and 1st gear ratio. A UK TD04 with cats will be happy at 4K RPM. a TD05 or larger will need more revs.
Quickly bring clutch up to its bite point (you should already know where this is from driving in stop-start traffic
).Hold the pedal just above that biting point for about the same time it takes to say 'elephant' aloud whilst giving the engine more throttle. Then bring the clutch up the rest of the way whilst flooring the throttle.
PS, I should get a launch vid up on youtube as there is alot of vids on there that don't seem to be able to launch properly.. and they change gear like a granny
I wonder if I can borrow my old Impreza back (still on the original clutch)
Thanks for this post, a lot to think about but my 3rd attempted I nailed it, with a video to show. On my friends closed bit of tarmac.
enjoy...
16 August 2013, 07:57 PM
#42
Unmapped 12.4s @ 105
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Don't have any incar footage, but, video of one of my races at SSO.
Give it death
and dump the clutch seems to work for me, no ALS or Lunch Control.
Launch was OK on this one too;
Beat SteveBT over the line too.
Give it death
and dump the clutch seems to work for me, no ALS or Lunch Control.Launch was OK on this one too;
Beat SteveBT over the line too.
Last edited by mickywrx; 16 August 2013 at 08:01 PM.
22 August 2013, 07:03 PM
#43
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Instuctions.
1) Give it about 5.5k revs
2) Dump clutch and hang on for dear life
THEN
(if you have a strong clutch and not so strong transmission)
3) Get out of car, walk backwards about 100 yards, picking bits of your gearbox up as you go!
4) Call APi and ask for a gearbox rebuild!
1) Give it about 5.5k revs
2) Dump clutch and hang on for dear life
THEN
(if you have a strong clutch and not so strong transmission)
3) Get out of car, walk backwards about 100 yards, picking bits of your gearbox up as you go!
4) Call APi and ask for a gearbox rebuild!
Last edited by New_scooby_04; 22 August 2013 at 07:06 PM.
28 August 2013, 11:29 PM
#48
No granny shifting here 
original VF35 on my blobeye STi = 12.2 
http://www.youtube.com/watch?v=C_THbleYcog
original VF35 on my blobeye STi = 12.2 http://www.youtube.com/watch?v=C_THbleYcog
13 October 2013, 09:43 PM
#50
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Have a look at this one!
High spec Legacy (9.88 sec 1/4 mile)
And my Impreza wagon that I hill climb.
Launch will be different depending on tarmac, gradient etc so don't think there is a set formula. It will depend on how you feel your car goes best on the day.
High spec Legacy (9.88 sec 1/4 mile)
And my Impreza wagon that I hill climb.
Launch will be different depending on tarmac, gradient etc so don't think there is a set formula. It will depend on how you feel your car goes best on the day.
14 October 2013, 02:28 PM
#51
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I launched my car 3 times with the dccd on the first green arrow, according to torque app 0-60 was below 4 seconds each time. Tried it on auto and the reocrded time was 7 seconds 
I doubt torque app is accurate though.
I doubt torque app is accurate though.
05 February 2014, 02:21 AM
#53
0-100 times
I have tried a few methods. From dumping the clutch to trying to balance loading the car while releasing clutch!
it seemed much easier to launch when I had a smaller turbo! Even with a 20G trying to get enough boost for a decent launch is a struggle!
I struggle to get below 4.5seconds with a 20G on a Classic. I was hoping for sub 4 seconds! I have no idea how subaru claims a stock STI is just as fast!!
Curious what 0-100Kmh (0-60) time people are getting and with what hp.
it seemed much easier to launch when I had a smaller turbo! Even with a 20G trying to get enough boost for a decent launch is a struggle!
I struggle to get below 4.5seconds with a 20G on a Classic. I was hoping for sub 4 seconds! I have no idea how subaru claims a stock STI is just as fast!!
Curious what 0-100Kmh (0-60) time people are getting and with what hp.
07 February 2014, 09:30 AM
#56
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Here's my old wagon with ESL Launch Control, FlatShift, Traction Control and ALS. It had a failed HG as you can see but still ran 11.5 @ 126mph on a stock location turbo. A 1.6sec 60ft on 215 section tyres 
09 February 2014, 05:59 PM
#57
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Datalog indicated 0-60 in 2.9 and 0-100 in 7.5. You can sort of confirm it on a stopwatch with the video, 60mph is the top of second gear and 100mph is close to the 4th-5th shift.
11 February 2014, 02:43 PM
#58
11 February 2014, 03:11 PM
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I kept filling it up and going out but the misfire got worse. Cossie HGs and RCMS studs later and she's good as new.