Megasquirt launch control

[Martin0660]

So I have not done anything with any of the "advanced" features of the Megasquirt (Microsquirt in my case). One of the features is launch control. With this, you can effectively change the timing and fuel to build NASTY boost for launch. A buddy just hooked his up and tried it against the rev limiter ...

[ame="http://www.youtube.com/watch?v=lj5TGqxxi9o"]YouTube - 1st try Megasquirt Launch Control[/ame]

I do not have enough of tire for that, but it will change the whole concept of leaving off the limiter.

Good project for this winter :D

[ModularMike]

So its like an ignition cut module? Thing should be pretty nasty. I installed an N2MB WOT BOX/ 2 step which is an ignition cut 2 step and no lift shift box on my uncles Cobra. I still have yet to test it out on the track though. I know the 2 step isn't doing anything for building boost but I like just being able to bury the pedal at the line and also the no lift shift makes shifting much easier.

[Martin0660]

So its like an ignition cut module?

In concept, yes.

This however is nothing like your typical two step / WOT box. Because the system has full access to all of the tables, you are doing this by retarding the timing and adding fuel. You can work with those two settings to make it snap right up to boost (notice how fast it reaches 25 psi), and determine how much boost you get. The RPM's are not limited in any way so you can still launch off the high limiter.

A two step or WOT box is limited to only cutting spark to a set RPM.

There is another feature built in call "flat shift" but I don;t see me using it on a power shift car.

[ModularMike]

Ah ok that sounds pretty badace!

[biminiLX]

Sweet vid!
Oh yeah Bob, with boost like that you won't need the rev limiter! :)
I can't wait to try that off the Transbrake, have you heard of one of those before? ;)
-J

[Martin0660]

have you heard of one of those before? ;)

I have heard of them ... something about auto guys that really want to launch like a stick car or something ;) We will see, an auto is still a possiblity for me next year, just need to find the right converter guy.

[biminiLX]

Will only believe that when I see it :)
-J

[ModularMike]

I have heard of them ... something about auto guys that really want to launch like a stick car or something ;) We will see, an auto is still a possiblity for me next year, just need to find the right converter guy.

WHAT THE F**K

[Martin0660]

WHAT THE F**K

J pretty well nailed it, beleive it when you see it ;) Still TBD

Will only believe that when I see it :)
-J

I really HATE the idea. It will take a perfectly fun stick shift car and suck a big part of the fun out of it for me.

Much the same as you went through ... The issue is, I really am stuck with the 4 cylinder T5's and expensive clutches. I'm at a power point that both are sketchy at best. I also need to turn this thing harder (6,800-7,000), but these T5's wont shift at higher RPM's. Even where I'm at now they are notchy and I miss one once in a while. Not a driver error miss (those happen too), it just wont go into gear if the RPM's are up there past 6,400.

So it's a real decission time ... keep the "fun" of the T5 and keep things sane, or do the auto swap and break less parts, go more rounds, run on radials, and ultimately go faster, etc. Lots to think about, on some levels I'm thinking keep it like it is and call it done, other parts of me wants bigger numbers.

[biminiLX]

Really can't see your car with the auto but I hear your concerns.
Do you use OD much?
A older 4-speed could be an option and then there's things like Richmonds or that new McCloed 800 (sp?) deal or even a worked TKO500 (3.27 first).
I'm sure you've thought of this stuff, just throwing it out.
-J

[Martin0660]

I do use OD but could tolerate being without it. I drove around a week once not using it just to see if I could live without it :D

I've been thrugh the tranny options for sure... It's mostly stay T5 or go C4 ;)

[NateSVT]

I installed an N2MB WOT BOX/ 2 step which is an ignition cut 2 step and no lift shift box on my uncles Cobra.

How was the install?

[ModularMike]

How was the install?

You soon realize how vast your vocabulary is, but as long as you keep the kids away, its pretty straightforward. The wiring isn't hard, whats hard is getting you hands to the wires. One of the first wires you have to do is on the PCM harness and its a bitch to strip and splice into but otherwise its not all that bad. It takes time and patience but it ain't bad at all. I also had a skinny friend of mine do the clutch pedal / cruise control wire, because I can't get up in there without taking the seat out.

[Steve-0]

That's slick shit.


it'd be pretty interesting to see how your car launches under boost with a transbrake!

[ModularMike]

That's slick shit.


it'd be pretty interesting to see how your car launches under boost with a transbrake!

My guess is not as hard as it launches under boost off the rev limiter with a Stage 3 Spec.

[Steve-0]

My guess is not as hard as it launches under boost off the rev limiter with a Stage 3 Spec.

I didn't think he has ever launched it under boost?

[Martin0660]

I didn't think he has ever launched it under boost?

ummmm.... YES, it makes about 12 psi off the limter ... This car would never launch with no boost.

[Martin0660]

My guess is not as hard as it launches under boost off the rev limiter with a Stage 3 Spec.

I'm not sure Mike ... the Brake is a whole different animal if the converter is big enough. Leaving off the limiter it has boost and then shock loads when the clutch drops ... with a brake it's loaded then transitions right into load ...

It might be REAL interesting, but I have NO experience there at all.

On edit - Here is another buddy with a 2.3 on a T'brake. This was a 1.49 60', and lifted the head at the stripe .. car usually goes high 10's. Still leaves pretty nasty to me ;)

[ame="http://www.youtube.com/watch?v=8g95s4QeKIE"]YouTube - chrisH3.wmv[/ame]

[Steve-0]

ummmm.... YES, it makes about 12 psi off the limter ... This car would never launch with no boost.

See that's what I thought but confused myself.

[ModularMike]

Yeah I wasn't 100% sure I never drove anything with a tranny brake. I'm sure the auto will come out of the hole just as hard if not harder but I would think it would take a loose converter.