28 replies to this topic

[Gremlin]

https://m.youtube.co...ist_app=1&app=m

Using features on my megajolt and a solid state quick react relay I've made a hard revlimiter that i'll use for launches

(To add I haven't just bought a hard revimiter board from autosport)

Edited by Gremlin, 08 November 2014 - 04:48 PM.

[coopdog]

Haaha classsss

Does it pop and bang a lot on the limiter?

[Steely]

Wow, sounds and looks great!

[Gremlin]

Yeah, only fitted today as me relay took ages to come, I'll post a couple more videos soon

[jt19]

Is it hard to do?

[mingy]

Haaha classsss

Does it pop and bang a lot on the limiter?

Or, does it say 5.....4......3......2......1..... Euston " IGNITION " we have lift off.....

[Gremlin]

Hahaha no, having an intermittent fault, diagnosed that the relay is creating a resistance and roughly 1 in 3 times when hitting the limiter it doesn't pick up, gonna just try a baulk standard 'square black relay' I fear it won't switch quick enough but you'll have to wait to find out

[Guess-Works.com]

I always thought launch control was primarily to make sure you had maximum torque, minimum clutch slip and maximum traction...

[Gremlin]

I agree it's not terribly high tech, but I'll do some testing and decide what best rpm is for different surfaces, tarmac it may bog slightly and gravel it may slip slightly. To be fair it's more 'pub points' than anything else, I don't compete, but have autotests in mind. A good launch control system would look at engine revs, load, wheel speed, gear selected etc to get the best launch, this technically isn't 'looking' at anything, just holding it at a certain rpm

[Guess-Works.com]

Good to see "pub points" haven't gone out of fashion.

[Turbo Nick]

It's not really much use on an N/A car, you can do exactly the same thing with your right foot and hold it at a set rpm to launch. for true launch control it'll need wheel speed sensors, gear sensors, efi being the main one.

 

I tried it years ago with my megajolt and it doesn't switch between maps quickly enough to do anything useful.

I had in mind using it for flat shifting and sitting on the line bouncing off the hard cut at 5k rpm building boost ready to launch with, with a switch on the clutch pedal to switch from normal map to the 2nd one with a lower hard cut limit.

Edited by Turbo Nick, 09 November 2014 - 09:30 PM.

[Steve-O 2014]

My M3 came from the factory with Launch Control. Its good fun

[The Matt]

OK, I'm going off a guess here...but is that a 998? 

[nicklouse]

I always thought launch control was primarily to make sure you had maximum torque, minimum clutch slip and maximum traction...

and about 20% wheel slip so it don't bog down.

[Gremlin]

OK, I'm going off a guess here...but is that a 998? 

Tis indeed. Why do you ask?