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1000 Bound · Veteran Joined: 06 Oct 2006 Posts: 26

Just installed the launch master stutter box. Sled is an Apex with the MCX rear mount at 12 psi. Complete trail sled set up for the asphalt. Sled is to have 260 claimed HP. Sled was terrible launching with turbo lag.

I now have the stutter set at 4900rpm and it builds 4-5 PSI boost.
Can anyone tell me an approx hp the sled would have had at 5000rpm with zero boost and now with 4-5 psi boost at 5000?
The flames coming out of the exhaust pipe are incredible.

Also need to know th adownfall to the stutter and the dangers to the motor.
Thanks

1000 Bound · Veteran Joined: 06 Oct 2006 Posts: 26

well had the msd out to test this weekend and it is absolutley the best mod for the buck for drag racing. An honest 3.5 tenths reduction on the asphalt

bert · Extreme Joined: 29 Jul 2007 Posts: 57 Location: quebec

Is it that would work great on hard pack snow ?

TJ YAM · Newbie Joined: 13 Feb 2006 Posts: 2 Location: mb

WHAT KIND OF ET, MPH
NOW
BEFORE
HAVE THE SAME SLED AND WAS THINKING OF PUTTING IT ON THE BLACKTOP

hlmrx1 · Posted: Mon Aug 25, 2008 6:57 am Post subject:

1000 Bound · Veteran Joined: 06 Oct 2006 Posts: 26

Sled was running with me on it at 250lbs with gear at 6.5s 1/8 and now 6.22. All in hte 60ft. went from 1.62s to 1.23 60fts. With a driver 50lbs lighter the sled was running 6.3 prior so we hope to see it in the 5s in the 1/8. With the lighter driver it ran 9.91 at 143 mph in the 1/4 prior to the msd

Otis RX · Posted: Tue Aug 26, 2008 5:29 pm Post subject:

How was the install?
I'd like that for the ice. Rear Bender w/ 2560r
Unbelieveable how hard it hits on ice!

FLYBYU · Posted: Tue Aug 26, 2008 9:20 pm Post subject:

it's simply just plug and play. there's room by the hi/lo light switch for the button. get one from radio shack. I have mine set to 5300 rpm stutter. to much for snow. I use mine for grass drags with a speed track running chisels. Just trying to keep the front end down now. Wish i would of extended the rails. Just going to run the illinois races this year, moneys tight.

1000 Bound · Veteran Joined: 06 Oct 2006 Posts: 26

TBird · Posted: Wed Aug 27, 2008 10:19 am Post subject:

I don't think it works on RX1, RX1 have CDI ignition, Apex have ?

RX1DERFULL · Posted: Wed Aug 27, 2008 11:34 am Post subject:

The launch mater will not work with 03 RX-1 CDI ignition.
This was confirmmed with msd tech support.

FLYBYU · Posted: Wed Aug 27, 2008 11:41 am Post subject:

It will only work with coil on plug applications. yes the apex is harder, even more when you have a mid-mount turbo (cpr).

rxrider · Posted: Wed Aug 27, 2008 6:00 pm Post subject:

The RX-1 has coil on plugs! Can it be used on the RXs? If not, why not?

FLYBYU · Posted: Wed Aug 27, 2008 6:24 pm Post subject:

zross1 · Expert Joined: 30 Jun 2007 Posts: 324 Location: utah

How does the msd know when to actually launch and stop the studder? Is it with the break?