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[EMD]

You need to do a 0-60 against Emds 2.5 manual at santa pod 

That thing is quick  Just needs the gear stick bending 

[TheBoy]

FFS Webby, get it over here, I'll break it on your behalf

Erm, no! 

TB, youre the master at these things - can you video your next ''stall launch'' pretty pleeeease?  Think of it as educating your flock 

You've done it now. TheBoy takes the word "launch" a little too literally. Best buy him a spare sump plug.

I only lost a sumplug once, yound man.  Other lauches have damaged the front bumper, damaged the front tyres on the arches, hit the shock endstops and scratched the undertray.

But only once have I lost the sumpplug

[Webby the Bear]

So come on then.  Who is going to take one for the team and show me a stall launched omega video.  Just so I know this isn't a conspiracy to wreck my gearbox 

[TheBoy]

So come on then.  Who is going to take one for the team and show me a stall launched omega video.  Just so I know this isn't a conspiracy to wreck my gearbox 

CBA's to video ought. But more than happy to demonstrate...    ...on your car

[Webby the Bear]

 

[EMD]

Have you thought about taking it to a rolling road , they will tell you exactly how many horses its lost from stock  Walk away disappointed then trade in for a 3.2 

[TheBoy]

Have you thought about taking it to a rolling road , they will tell you exactly how many horses its lost from stock  Walk away disappointed then trade in for a 3.2 

Pointless, as its an auto

[EMD]

Have you thought about taking it to a rolling road , they will tell you exactly how many horses its lost from stock  Walk away disappointed then trade in for a 3.2 

Pointless, as its an auto

 

[Webby the Bear]

Forgive my stupidity but as my compression tests are all spot on and its clear there's not saw carbon build up in the engine how would it have lost horses. . . Assuming it was manual and could be tested on rolling road?

[BazaJT]

When GM quoted bhp figures were they quoting at the flywheel or at the road wheels?

[YZ250]

....
https://www.youtube.com/watch?v=Ot8PwenuF2o

just googling around, it appears that doing this wont affect the tranny. im still a bit scared to do this. do I need to turn the TC off also?

There's a bit of a contradiction in the write up below that video. In one sentence it says "It is important to turn traction control on" followed by "having traction control on limits the launch".

For Webby's benefit, when I use Launch Control in my other car, the 'Sport +' mode automatically turns traction control OFF, as already said above .Having traction off in a car that does 0-60mph in around 4.9 seconds in standard form can make life ........ interesting, especially if the ground is a bit damp.  Based on that, I generally leave the buttons alone and just floor it in Sport mode, unless I'm feeling particularly adventurous. 
You'll be fine in the 2.5 but remember, you are effectively holding something back that wants to go.

[Webby the Bear]

thanksYZ, appreciatethe input.

so basically, doing the stall approach wont makeme spin off the road...but will get me a faster time

[05omegav6]

Forgive my stupidity but as my compression tests are all spot on and its clear there's not saw carbon build up in the engine how would it have lost horses. . . Assuming it was manual and could be tested on rolling road?

But if it were a manual, it would already be a second faster...

[YZ250]

thanksYZ, appreciatethe input.

so basically, doing the stall approach wont makeme spin off the road...but will get me a faster time

It's basically getting the car ready to go before you let it go. In a powerful enough car you can make a right dogs dinner of a launch start but the 2.5 is too heavy to spin out from a straight line start, unless it's wet, in which case you shouldn't be doing it. 
Put it this way, your right foot is telling the car to go and your left foot is preventing it from going, so it's not doing it any favours.
Do it once to satisfy yourself and then stick to sport mode, foot flat down and keep it simple. I've never bothered to time flying starts as I'm too busy watching where I'm going  , so I can't answer that one. 

[Webby the Bear]

Forgive my stupidity but as my compression tests are all spot on and its clear there's not saw carbon build up in the engine how would it have lost horses. . . Assuming it was manual and could be tested on rolling road?

But if it were a manual, it would already be a second faster...

That is true. but whats the answer to the question..... how can a car lose horses if the copressions good, alls working well with the engine and, as we've determined before, hardly any carbon build up in a modern engine?