The Mis-Firing System? Help?

[2of9]

Yeah...I was jus watching WRC and saw the rally cars have that misfirin system. Doesnt that Mis-Firing System make the turbo always spool and never lag? i dont know but heard it in the WRC shows, and i want one in my DSM..ahhaha...well, is it possible? Is there anything like that to get in the U.S. for your DSM? well...thanks...

[Urban_Squrill]

Its a anti-lag system. It basicly shoots flames throught ur turbo so it would spool a t-66 at like 1500rpm's But you would kill the turbo with in 2 months. It also kills ur exhaust. Their are other systems that use a spark plug and some thing that brings used fuel into the manifold. Just look up anti lag turbo systems on google. My friend has a thing like that on his rx-7. http://www.rallycars.com/Cars/bangbang.html

[kjewer1]

There are several stutterbox systems out for DSMs. TMO, Keydiver, etc, and ignition cut like MSD ignitions have. The only thing I am aware of that is specific to DSM with actual antilag though is DSMlink. Retards timing and dumps fuel so part of the combustion process occurs in the manifold/turbine housing. It does help spool, but to say that it would take 3000 rpm off the boost threshold (t66 at 1500) is a gross exageration. And it only works while stuttering on the start line (to launch with boost) or during a shift. So it really has nothing to do with what rpm you get full boost at. A regular stutter box will build about 15 psi on smaller turbos (up to 16g) and 10 psi on 20g/50 trim sized turbos. With DSMlinks antilag you can get over 20 psi on 16 and smaller. In my case I build zero boost on a 5500 rpm stutter with a T67, but can probably get ~5 psi on antilag. I dont use antilag on the shifts, just a regular 6000 rpm stutter. Took 7 tenths off my times last time I took the car to the track. I plan to try it with the antilag enabled next season.

[Urban_Squrill]

I was talking about a t-66 on a rx-7.

[kjewer1]

Is that accurate? It still seems awefully high. I know rotarys put out tons of exhaust heat which should help, but I thought they were still pretty slow to spool big turbos. Interesting.

[JoeWagon]

I was under the impression that rx7's are lower displacement and take even longer than a DSM to spool. I don't think you could spool a T25 on an rx7 that low.

[Urban_Squrill]

He has a anti lag system on it that injects unused fuel into the exhaust manifold with a spark plug to ignite it, and a modded ecu. I think he is pushing 10psi. I will have to give him a call when he gets back in town(he drove 4 hours to the closest track). I might now be quite 1500 but I know its under 2000. It also is somewhat boosting at idle.

[kjewer1]

Rx7s have low displacement but fire more often. With a typical 4 banger only half of the motors displacemtn is fired per revolution. I believe a rotary ends up being basically double its displacement, but at the moment the mechanics of why that is escapes me. I'll think it over for a bit, but perhaps someone well versed in rotary motors can chime in before I get around to it.

But just for the sake of trying to get the ball rolling, a rotor has 3 combustion surfaces each. So 6 total combustion events per rotor revolution. Now, I believe the rotor spins 3 times slower than the "crank," So that would be 2 combustion events? But this still doesnt help me because I can't recall how the rotarys displacement is calculated. Damn it all.

[Talon_ESi]

Since a rotary utilizes three firing surfaces and has the ability to rev so high, it could very well with little modification spool up a turbo such as the T-66 efficiently at 1550-1600 RPM and it can very well spool up faster than a standard DSM, but in the end we all know a moded up DSM will and does kick ass

[2of9]

yo, is there a site where i can get info of the "misfiring" system? thanks

[kjewer1]

google antilag, stutter box, launch limter, etc. I dont know of a specific site.

[1stGenRocks]

the site a couple posts up in this thread has a bunch of info on the antilag system in general. nothing specific for eclipse but the site is http://www.rallycars.com/Cars/bangbang.html

[2of9]

is this the misfiring system?
http://www.dsm.sillymods.net/files/fireball_0001.wmv

jus found it cruzin the net

[2of9]

uhhh...can anyone look at the clip i got?

[JoeWagon]

Just know that there is a difference between stutterbox, anti-lag, and No Lift To Shift, NLTS. Stutterbox is off the line, and the other two are during shifting. anti-lag is our equivalent to the misfiring system. NLTS is a rev limiter when the clutch is in (you shift with the gas floored and it bounces off that rev limiter). Both could cause misfiring.