Launching 4k limit

[jimme18]

howsit

I wanted to Launch my car the other day but it deosnt let me rev the car past 4k when its not moving, hindering my launch, y is this? I assume its a saftey thing to protect the clutch and engine.

anyone know the answer?

cheers

[WRXONP]

what model?? sounds like launch controll man

[jimme18]

2005 v9

[Joker]

more info - what ecu

[WRXONP]

dont they have a factory launch controller?

[jimme18]

couldnt tell u about the ecu, iassume its all standard, its just rocking a 3 inch and a simota panel filter to the best of my knowledge

[jacsmiley]

sounds like the 4k rev limit ford put in the mondeo and others ford made. but it was only in the auto when in "N" or "P". but im sure this has to be after market!!

have you tried 100% throttle and slowly letting the clutch out? it might over rev just before engagement or something?? there has to be a limit switch or some sort of sensor on one of the clutches moving parts. find it and delete it if you cant control/modify it!

or they do have factory launch control??

[WRXONP]

wouldnt the ecu just look at speed sensors and say hay your not moving im going to rev limit at 4k?

[Guest]

What is it? wrx, sti, spec c?

[jacsmiley]

 WRXONP said:

wouldnt the ecu just look at speed sensors and say hay your not moving im going to rev limit at 4k?

yeah that too! thats gay, that would "F" me off!!! i wonder what would happen when you tried to give it the "ol clutch stab"??!! 4k?

[WRXONP]

 jacsmiley']

[quote name='WRXONP said:

wouldnt the ecu just look at speed sensors and say hay your not moving im going to rev limit at 4k?

/quote]

yeah that too! thats gay, that would "F" me off!!! i wonder what would happen when you tried to give it the "ol clutch stab"??!! 4k?

haha u dont need a clutch to break loose or what ever haha....power over..

[jacsmiley]

true that but you usually have to dial up at least 5k to light up 3rd

[jimme18]

jus took it for a drive now, it launches pretty hard at 4k but it is like launch control it just sits there at 4k reving when the pedal is flat, i'll look into it in the morning, on a positive note; its stopping me from burning out clutch after clutch

cheers for the help

[rex-leggy]

there usually run off a reed switch on the clutch pedal . well mine is

[Joker]

apart from the limited facts

{2005 V9 manual Impreza quite likely a WRX}

this is a pretty munter topic BUT my interest has peaked at a rev limit/er i never knew about

[GC8E2DD]

It is an '09 STi w/ DCCD according to previous posts. I've never heard of a factory fitted launch control system on a Subaru. 4k also sounds quite low too - my gc would just bog dropping the clutch at 4k (unless wet). I wish I could remember what Viv's Legacy was running at launch.

[funkytown]

interestingly i discovered our BPE outback does the same thing. given its an H6 and auto, but its still totally factory.

at about 4500rpm (cant remember exactly), with it in "N" it acts just like launch control.

as to why the OP's is doing it - sounds like guess work and making stuff to me without knowing / speculation. Take it to an auto sparky or performance shop to have a quick gander at. Diagnosing this one of the internet sounds near impossible.

 GC8E2DD said:

I wish I could remember what Viv's Legacy was running at launch.

a touch more than 4k iirc - but remember was also using antilag?

[sti_v9]

PM'd you. Its got launch control on it - I think thats my old car.

[Guest]

 GC8E2DD']

It is an '09 STi w/ DCCD according to previous posts. I've never heard of a factory fitted launch control system on a Subaru. 4k also sounds quite low too - my gc would just bog dropping the clutch at 4k (unless wet). I wish I could remember what Viv's Legacy was running at launch.

Spec c had factory ecu options like that, you can flash a normal ecu to have launch control too. Will it rev normal in neutral and a soon as the clutch pedal is pushed it cuts at 4k?

interestingly i discovered our BPE outback does the same thing. given its an H6 and auto, but its still totally factory.

at about 4500rpm (cant remember exactly), with it in "N" it acts just like launch control.

as to why the OP's is doing it - sounds like guess work and making stuff to me without knowing / speculation. Take it to an auto sparky or performance shop to have a quick gander at. Diagnosing this one of the internet sounds near impossible.

[quote name='GC8E2DD said:

I wish I could remember what Viv's Legacy was running at launch.

/quote]

a touch more than 4k iirc - but remember was also using antilag?

All Bp H6's do that, Its probably a strategy to stop unessential rev's in neutral.

[ODB]

if you arent dumping the clutch at 10k rpm you arent a true BAWSE!

True story!

[wrx_lou]

 JoKer said:

apart from the limited facts

{2005 V5 manual Impreza quite likely a WRX}

this is a pretty munter topic BUT my interest has peaked at a rev limit/er i never knew about

They made version 5's in 2005?

[Joker]

sue me that was pre coffee

it is possible to register an old car as NEW like that

[DAKRNK]

I'm Local, may i have a turn?

[Guest]

 JoKer said:

it is possible to register an old car as NEW like that

Yep if it has never had rego in any country.

[Pappu1]

u can set launch controll on the stock ecu from v7 upwards

most likely it had the launch control activated

i fond the best launched in the 5.5k rpm mark,.,