Launch Control AP

VanishingPoint · 03-16-2008, 06:13 AM

Tried it out yesterday. WOW hang on to your hat it takes off with a rush. I consider myself fairly good at launching a manual trans car, but I never launched like that.

I did have problems and I would like to know if they can be worked out or if the LC is unpredictable and causes problems every time?

1st time I launched I was thrown back in the seat and then a second later I was thrown into the seat belt like the key was turned off. It was alittle abusive.

2nd launch I cranked the FFS limiter to 5500 RPM. This launch was better, but I had some missing, like what you hear when you bouncing off the rev limiter at launch, as I was moving and only cleared after a shift to second.

Im thinking of jacking up the FFS RPM to 6500 to see if this clears it up. I like to rev to 6000rpm before I shift.

Has anyone gotten this ajusted to work consistantly, or is this just a problem child that cant be fixed, or is it me?

IM Stage 1 V103
LC set at 4500 rpm, plenty good enough for now.
FFS set at 5500

Tony

**04STiguy79** · 03-16-2008, 06:20 AM

Bump up the FFS, that is what is causing the problem with the shift to second and so on. 65k or 68 should work out excellent.

VanishingPoint · 03-16-2008, 12:44 PM

Thanks I will give that a try.

I was under the impression that the FFS rev limiter wouldnt come into play until
the clutch was engagaed. Wrong again. That twice now this year, I have to start paying more attention.

Tony

nhat · 03-16-2008, 01:16 PM

i hope you know that launch control & ffs are extremely abusive to your motor and drivetrain.

RC311 · 03-16-2008, 03:55 PM

Cobb also came out with a V1.04 alot of people are liking. I don't know if it has anything to do with this problem, but I thought id let you know. You have you AP already? Have you switched to your summer tires yet?

VanishingPoint · 03-16-2008, 04:47 PM

Quote:

Originally Posted by nhat

i hope you know that launch control & ffs are extremely abusive to your motor and drivetrain.

Yes, Cobb plasters that all over their web site.

How many here have damaged their cars with launch control?

I believe if you dont use it all the time and feather the clutch it will be ok.

Dump the clutch at 5 grand using launch control and you will break something.

Thanks for the warning.

Tony

swp-07-sti · 03-22-2008, 09:27 AM

Quote:

Originally Posted by VanishingPoint

Yes, Cobb plasters that all over their web site.

How many here have damaged their cars with launch control?

I believe if you dont use it all the time and feather the clutch it will be ok.

Dump the clutch at 5 grand using launch control and you will break something.

Thanks for the warning.

Tony

what do you mean by feather the clutch? and dumping the clutch at 5K? sorry i am still learning this Lc feature, i want to do my homework before using it in my car. what settings do you guys use that works the best? thnks

jordanretro1223 · 03-22-2008, 11:40 AM

Quote:

Originally Posted by swp-07-sti

what do you mean by feather the clutch? and dumping the clutch at 5K? sorry i am still learning this Lc feature, i want to do my homework before using it in my car. what settings do you guys use that works the best? thnks

Dump means rev it to 5500 RPM's or whatever the LC is set at and and let the clutch out all the way.

Feather means rev it up to 5500 RPM's or whatever the LC is set at and let the clutch out semi gradually like you kinda would to just start up normally.

Correct me if I'm wrong.

VanishingPoint · 03-22-2008, 06:39 PM

Quote:

Originally Posted by jordanretro1223

Dump means rev it to 5500 RPM's or whatever the LC is set at and and let the clutch out all the way.

Feather means rev it up to 5500 RPM's or whatever the LC is set at and let the clutch out semi gradually like you kinda would to just start up normally.

Correct me if I'm wrong.

Thats what I meant, but it would be a fast feather. Dont want to burn up the clutch.

ryanwrxduksa · 03-22-2008, 06:51 PM

So how bad is it for my wideband to be bottomed out lean when launching? Its only for a second or two but still. Also, do we have to worry about floating a valve on the 07 STi's?

Also, I heard FFS pulls timing and doesnt really help times. Any truth to this? And if not does it really harm the motor?

Thanks, Ryan

VanishingPoint · 03-22-2008, 07:01 PM

I found out what I did wrong from the first post. Believe it or not I was adjusting the wrong rev limiter. I had the FFS limiter at 4500rpm and the lauch control at 6500rpm. I would launch and it would bounce off the rev limiter while I was trying to take off and shift. That really shook the car.

I figured it out by pushing the clutch in and reving while driving. When it was limited at 4500 rpm instead of 6500 rpm I knew something was wrong. After reversing the limiters it worked like a charm.

It apears to me that the FFS limiter works all the time whether the clutch is in or out, moving or not. I dont care for that so I set it to 6800rpm to get it out of the way.

IM getting some bad smells when I use it (like rubber burning) I will us it very little.

But I like it.

ryanwrxduksa · 03-23-2008, 04:28 PM

Bump for my question on post 10

AllWheelDriven · 04-02-2008, 10:41 AM

So has any broke anything or had any problems at all using Launch Control?

When I asked Cobb how it worked they said it ignites gas in the manifold to spool the turbo.
Honestly I can only see that being hard on the turbo.

I have done a few LC launchs with mine since I had it protuned.
I set mine to 4k rpm so that the clutch hits at my peak torque.

I can build about 8-10lbs of boost off the line but I launch with less since 8-10lbs gives you a lot of wheel hop.

@ around 5lbs The car launches like a rocket and you get some wheel spin.

I noticed when flat foot shifting the car pulls timing and is slower for a fraction of a second after it is activated. so, I dont use it.
I set the flat foot shifting to 7200rpm so it doesn't come in to play.

rjacobs · 04-02-2008, 10:46 AM

Quote:

Originally Posted by VanishingPoint

IM getting some bad smells when I use it (like rubber burning) I will us it very little.

But I like it.

Thats clutch your burning

VanishingPoint · 04-02-2008, 02:26 PM

I have smelled clutches before, and this was more a rubber smell then burning brakes.
I havent driven it since my last post, but Im thinking the exhaust is getting hot and rubbing on the AC drain. I was using it alot, driving it hard without a cool down.

You could be right.

When she goes i will remove the engine to change it, I hear the pistons need changing (07 ), and while Im there it would be easy to change the turbo, injectors, cams. Hope the clutch dont go that could get expensive.

Tony

03-16-2008, 06:13 AM	#1
VanishingPoint Junior STI Driver Car: 07 STI Location: Michigan Posts: 169 Join Date: Nov 2004 Trader Rating: (0)	Launch Control AP Tried it out yesterday. WOW hang on to your hat it takes off with a rush. I consider myself fairly good at launching a manual trans car, but I never launched like that. I did have problems and I would like to know if they can be worked out or if the LC is unpredictable and causes problems every time? 1st time I launched I was thrown back in the seat and then a second later I was thrown into the seat belt like the key was turned off. It was alittle abusive. 2nd launch I cranked the FFS limiter to 5500 RPM. This launch was better, but I had some missing, like what you hear when you bouncing off the rev limiter at launch, as I was moving and only cleared after a shift to second. Im thinking of jacking up the FFS RPM to 6500 to see if this clears it up. I like to rev to 6000rpm before I shift. Has anyone gotten this ajusted to work consistantly, or is this just a problem child that cant be fixed, or is it me? IM Stage 1 V103 LC set at 4500 rpm, plenty good enough for now. FFS set at 5500 Tony This ad is not endorsed by this member. Please register or login to hide this ad.

03-16-2008, 06:20 AM	#2
04STiguy79 Gold Member Car: 04 Platnm Silvr STi Fav Mod: GT35R 450+WHP Pump No Meth Location: MD,BASC Club,Team Agile Posts: 833 Join Date: May 2007 Trader Rating: (4)	Re: Launch Control AP Bump up the FFS, that is what is causing the problem with the shift to second and so on. 65k or 68 should work out excellent.

03-16-2008, 12:44 PM	#3
VanishingPoint Junior STI Driver Car: 07 STI Location: Michigan Posts: 169 Join Date: Nov 2004 Trader Rating: (0)	Re: Launch Control AP Thanks I will give that a try. I was under the impression that the FFS rev limiter wouldnt come into play until the clutch was engagaed. Wrong again. That twice now this year, I have to start paying more attention. Tony

03-16-2008, 01:16 PM	#4
nhat Professional STI Driver Car: 04 sti Fav Mod: enginuity tuned Location: NoVA Posts: 417 Join Date: Aug 2007 Trader Rating: (0)	Re: Launch Control AP i hope you know that launch control & ffs are extremely abusive to your motor and drivetrain.

03-16-2008, 03:55 PM	#5
RC311 Junior STI Driver Car: Peral White 07 STi Fav Mod: Coming Soon Location: Michigan Posts: 73 Join Date: Feb 2008 Trader Rating: (0)	Re: Launch Control AP Cobb also came out with a V1.04 alot of people are liking. I don't know if it has anything to do with this problem, but I thought id let you know. You have you AP already? Have you switched to your summer tires yet?

03-22-2008, 06:51 PM	#10
ryanwrxduksa Junior STI Driver Car: Pearl White 07 STi Posts: 138 Join Date: Aug 2007 Trader Rating: (0)	Re: Launch Control AP So how bad is it for my wideband to be bottomed out lean when launching? Its only for a second or two but still. Also, do we have to worry about floating a valve on the 07 STi's? Also, I heard FFS pulls timing and doesnt really help times. Any truth to this? And if not does it really harm the motor? Thanks, Ryan

03-22-2008, 07:01 PM	#11
VanishingPoint Junior STI Driver Car: 07 STI Location: Michigan Posts: 169 Join Date: Nov 2004 Trader Rating: (0)	Re: Launch Control AP I found out what I did wrong from the first post. Believe it or not I was adjusting the wrong rev limiter. I had the FFS limiter at 4500rpm and the lauch control at 6500rpm. I would launch and it would bounce off the rev limiter while I was trying to take off and shift. That really shook the car. I figured it out by pushing the clutch in and reving while driving. When it was limited at 4500 rpm instead of 6500 rpm I knew something was wrong. After reversing the limiters it worked like a charm. It apears to me that the FFS limiter works all the time whether the clutch is in or out, moving or not. I dont care for that so I set it to 6800rpm to get it out of the way. IM getting some bad smells when I use it (like rubber burning) I will us it very little. But I like it.

03-23-2008, 04:28 PM	#12
ryanwrxduksa Junior STI Driver Car: Pearl White 07 STi Posts: 138 Join Date: Aug 2007 Trader Rating: (0)	Re: Launch Control AP Bump for my question on post 10

04-02-2008, 10:41 AM	#13
AllWheelDriven Junior STI Driver Car: OBP,2005,STi Posts: 69 Join Date: Nov 2006 Trader Rating: (0)	Re: Launch Control AP So has any broke anything or had any problems at all using Launch Control? When I asked Cobb how it worked they said it ignites gas in the manifold to spool the turbo. Honestly I can only see that being hard on the turbo. I have done a few LC launchs with mine since I had it protuned. I set mine to 4k rpm so that the clutch hits at my peak torque. I can build about 8-10lbs of boost off the line but I launch with less since 8-10lbs gives you a lot of wheel hop. @ around 5lbs The car launches like a rocket and you get some wheel spin. I noticed when flat foot shifting the car pulls timing and is slower for a fraction of a second after it is activated. so, I dont use it. I set the flat foot shifting to 7200rpm so it doesn't come in to play.

04-02-2008, 02:26 PM	#15
VanishingPoint Junior STI Driver Car: 07 STI Location: Michigan Posts: 169 Join Date: Nov 2004 Trader Rating: (0)	Re: Launch Control AP I have smelled clutches before, and this was more a rubber smell then burning brakes. I havent driven it since my last post, but Im thinking the exhaust is getting hot and rubbing on the AC drain. I was using it alot, driving it hard without a cool down. You could be right. When she goes i will remove the engine to change it, I hear the pistons need changing (07 ), and while Im there it would be easy to change the turbo, injectors, cams. Hope the clutch dont go that could get expensive. Tony This ad is not endorsed by this member. Please register or login to hide this ad.