VettesandZs

I believe there is the MSD 8733 and Lingenfelter makes one. Any one else, likes, dislikes?

LinearX

In terms of wiring, the MSD unit appears to be much simpler. If I recall, it's literally connect the coil pack harnesses and then your choice of 12v power or the ground to the clutch switch. Also, the MSD device "deactivates" unless it sees an RPM drop equal to 1/3 of the set launch RPM. So if you're set to launch at 4000 RPM, the unit would have to see an RPM drop of 1333 RPM before it would reactivate (this is only applicable if using the clutch ground).

From what I remember about the Lingenfelter device, you have to have another box to disable the two-step function.

SanfordB

Naw man the lingenfelter is the easy one. It just piggy backs the coil packs with connectors, then either a 12v or ground wire can activate it, so plug it in and one wire thats it. Hooked up to the clutch switch its on when you push the clutch and all other times its off.. works great.

algZO6

you are correct. i did the testing for msd and it took about 30 seconds to hook up (once you run the wire from the clutch switch pin). it realy is an awsome piece, no external buttons or switches. all you do is step on the clutch, floor it, and drop the clutch on the last yellow.

SanfordB

They are both super easy to hook up then, even better!

LinearX

Good info on the install of the Lingenfelter piece. I stand corrected that it's similar in nature to the install of the MSD. It's been a while since I've looked at the install instructions for it, so I may have been making it more complicated in my head than it really is.

VettesandZs

I guess I should have posted that this is an A4 with a Yank PT 4000 converter. I am trying to find the best way for a consistant launch.

LinearX

Transbrake.

VettesandZs

I mentioned a transbrake on another post and was told that was just a good way to break stuff.

LinearX

If you put your foot on the brake and start to stall the engine, how many RPM does it turn before the tires start to break loose?

I'm going to throw some arbitrary numbers around for examples.

If you can stall the engine up to 4000 RPM on the foot brake before the tires start to spin but you want to launch at 3500 RPM, then you'd be able to use one of the 2-step controllers to get that consistent 3500 RPM launch. However, if on the foot brake, all you can stall the engine to is 3000 RPM and you want to launch at 3500 RPM, then the 2-step will do you no good.

A transbrake and the 2-step will allow you to put your foot on the floor and have the launch RPM limited by the 2-step until you let off the transbrake (provided you have the wired to activate simultaneously).


...and, yes, a transbrake is hard on parts. You'd want to have transmission with good guts in it before going the transbrake route.

VettesandZs

I have been racing 25 years, I know about transbrakes and how they work, just wondered how well they would hold up on a 4L60. My trans is Pro built 4L60E stage 5, Yank PT4000 T/C. I heard of someone in Indiana that does trans' and I will be looking into that.

LinearX

Didn't mean to imply anything, I just wanted to be as clear as possible.

Probably wouldn't hurt to call Yank and see if they have had any issues with transbrakes in the built transmissions. They're as good an authority on that as anyone, I'd guess.

VettesandZs

I just found out the MSD 2-step Launch Control 8733 is not for LS1 cars, straight from MSD. SH_T

algZO6

i dont have the part number but they told me it would be out soon.

LinearX

REALLY?? That blows. I don't think I ever got any indication from reading the install instructions that it was limited to certain models of the LS-based engine.

VettesandZs

I downloaded instructions, didn't see anything either, when I went to order to make sure, jegs could not tell me if it would work on a 2001, they called MSD and said no.

VettesandZs

So is there any other 2-step for a 2001 besides the Lingenfelter?

LinearX

There was a 2-step made by a cat named Harlan. Unfortunately, he's not making them anymore. I've always read good things about them, and they come up for sale periodically.

I just sent an email to MSD asking about their 2-step and it's applications. If I don't hear from them by Tuesday, I'll call them and find out for sure.

LinearX

I got bored and called MSD about p/n 8733. The cat on the phone, Joe, told me that it would work with LS-based engine. At this point, I guess the only way to find out is to buy one and try it.

SanfordB

Why not just get the Lingenfelter that we know works and be done with it?