crf450r

iTrader: (1)

ive just had launch control fitted by a new company called open-mapping in the midlands,,this is the best toy ive bought for the scoob for very little cash.. simon fitted it in the evening and wouldnt stop tweaking until it was spot,, nothing is too much troulbe talking you through everything all the way through
have a look at the webby Subaru Impreza Ecu Mapping
and heres a vid of him working his magic

http://www.youtube.com/watch?v=rT5bL2Ulxn8

TingTongPJ

iTrader: (24)

great vid, launch is great fun almost as much as anti lag.

i would'nt go using it too much till i found out why my engine check light was on though could be costly.

rewindnottm

Well nice..a little like a Maccy D's ... you cant do it every night.or you'll end up like Elvis

sound the nuts too..

Neanderthal

iTrader: (6)

Do they actually do mapping or just uploading opensource maps that are available to download of the internet?
XPT Stage 2 - 01/02 EDM WRX with Launch Control [XPT2900D] - $55.00 : XPT Tuning, The XPT Tuning Online Store

Shaun

crf450r,
Now take the car to somewhere like Santa Pod with sticky tyres. See how "spot on" it is then.

LC can be good, but it's set-up can vary on surface, charge temps, tyres and tyre pressures.

bluenose172

iTrader: (2)

They might be available to buy on the internet, but not everyone has the kit/knowledge/***** to write them to their cars in this country, I say fair play to them. About time this scene came to the UK.

Why is the engine check light on when testing the launch? Were the green connectors still connected?

adman73

I'm curious how this is launch control? What does it do other than control engine revs? A true launch control system also controls the clutch, balancing this with traction and engine power.

Perhaps I'm missing the point but how does this work?

Crosstalk

I was wondering too. I can see it holds engine speed at a pre-determined point, but is that it? Launching for me was always a compromise between a bang as the clutch engaged then bogging down (it even jumped out of gear a couple of times doing this) or slipping the clutch, getting away fast, but a cloud of stinky clutch smoke following, neither of which can be good.

Shaun

"Proper" launch control will also build boost whilst stationary. Mine hit's 1bar and then all hell breaks loose!

mickywrx

iTrader: (29)

Thats full boost for mine

Best form of controlling launch is use of left and right feet, IMO.

bluenose172

iTrader: (2)

This 'hack' uses the fuel cut rev limiter to hold the revs, it does build some boost, some have seen up to 10 psi. Off the top of my head it has two parameters, RPM and MPH(where it will switch off).

Jam Performance

iTrader: (3)

LC is very good for the drag strip, my simtek has it built in and is activated via the Neutral position switch, it holds the revs at 4.5k revs with positive boost and enables perfect launches, with the DCCD turned up the traction is stunning !

rewindnottm

The launch control are ecu programmed, it reduces your rev limit to a predetermined rev limit and is turned on below a set speed,

Personally I set the speed to below 5mph and the rev limit to 4.5revs although this normally increases

www.open-mapping.com install tinywrex's launch control and flat foot gear shifting starting from £50

JimmyBFC

Not really....limiting the revs to a pre-determined setting allows you to concentrate more on letting out the clutch without balancing, which will actually make launching harder.

Planting your foot clean to the floor on the gas while it only revs to say 5k allows you only to worry about finding the bitogn point and releasign the handbrake.

The only problem with launching is it will eat transfer boxes, drivechains, clutches when done once too often.

mickywrx

iTrader: (29)

I don't use the handbrake.

Stage, bring the revs up, 5.5k ish, blip the throttle so it'll make some boost.

Lights change - dump the clutch - off like a scalded cat, well as much as 330bhp would scald a cat.

That works for me.

Shaun

Micky,
You will not make any boost by "just" blipping the throttle.

rooferman

iTrader: (6)

So will launch control better my 1.6 60ft times at the pod.....?????

Have to say that my car doesn,t bog down and i have no issues launching without lc...so would it gain me a bit ay the strip...???

Only thing i havent tried yet is flat foot shifting from 1st to second....

JimmyBFC

unless your forged and revving to 8k+ with a massive turbo....5.5k is a bit high to launch from, I find 4.5k just about right and im running 380bhp or therabouts.

Balancing between the throttle and clutch will be doing you no favours, its a no-brainer being able to keep the gas fully down without worrying about getting the revs just right, at 5.5k im sure your doing more wheelspinning than actual productive movement off the line, therefore if thats the case you'd probably get as good a start by just dong a fast start.

As Shaun mentioned, proper mapped in launch control will also build boost, whereas you won't be at this minute in time, but hey, if it works, don't fix it, just try it out though - because its a nice mod if your into sprinting or 1/4 mile.

Shaun

JimmyBFC,
The revs to launch at, also have something to do with the tyres and surface grip. The higher the grip, the higher the revs needed to break traction. Mine was increased to 5.5k on Sunday for ScoobySprint, as it was bogging down at 4750. This is why, just setting up once may not always be a catch all for differing venues and set-ups.

JimmyBFC

I can agree with that Shaun, lovely car you have there too, I was there, one of only 3 evo's I think.

Shaun

Thanks mate. Who knows how well it will go, once the boost is turned up and it can actually go round corners correctly!

Say "Hello" next time.

Aztec Performance Ltd

iTrader: (234)

I seriously doubt it. 1.6s is spot on for road tyres.

My launch control is my left and right foot - nice and easy to adjust

Aztec Performance Ltd

iTrader: (234)

Your finalised run bogs?

crf450r

iTrader: (1)

the light was already on when i took it to open mapping so simon used there software to diagnose it was running lean on bank 1 and suggested in the first instance to get the MAF cleaned and check boost pipes and if that didn't clear go straight to a garage to get it checked out. no charge for this i might add

crf450r

iTrader: (1)

just to clear a few issues
The launch control originally set for the 4.5 which was too low, it was then upped to 6.0 but this was too much as It wheel spinned and then it was decreased in increments, the final setting that I decided on was 5.6. As the best setting for my requirements based on wheel spin to bogging ratio.