MSD Rev Limiter

Does anybody know how to wire an MSD Soft Touch (God ! It sounds do gay) 8728 to a Mitsubishi 4G63 ?

I asked MSD they say it can't be, but I have seen a Mitsu running with it so WTF ??

---

Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


Rallies are no place for traitors

I think the soft touch requires a reacharound cable, no?

Yeah, it needs a reacharound cable that is terminated with a deepthroat socket at the distributor.

---

Grant Hughes

Quote

Soft Touch Rev Control, PN 8728, is designed to be used on standard points ignition or inductive ignition systems. This means that the PN 8728 can be installed on engines with a GM HEI Ignition, Ford or Chrysler electronic ignition, any standard breaker points systems or even with an MSD 5 or Blaster Ignition (non-CD ignitions).
The Soft Touch Rev Control is adjusted with plug-in modules and is supplied with 6,000, 7,000 and 8,000 rpm modules. When the engine reaches your set rpm, the Soft Touch circuitry kicks in and drops the spark to certain cylinders. These cylinders are fired on the next cycle to prevent fuel from loading up in the cylinder. This limiter produces very accurate and smooth, backfire-free rev limits.
Can be used on 4, 6 or 8-cylinder engines with inductive ignitions.

NOTE: Not for use with CD Ignitions.

Soft Touch Rev Control, Non CD Ignitions
PN 8728

Are you positive it was the 8728 part and that everything else on that car was the same as yours?

---

Mike Hymbaugh
"Converted" drag racer
Castle Rock, CO
http://www.four-banger.net/first.html

Well it is AC Delco labeled with part #10037379 which cross references to PN8728.

The Mitsu I have seen had the stock coil setup so it was not one of those MSD ignition jobbies. It did say "Soft Touch".

Again I am reluctant to try anything that says Soft Touch on it, especially on my Galant. The built in rev limiter is inop so I need something to keep me from revving over 6300. Even the 690cc injectors are jumping up to 98% duty cycle at like 6250 rpm, basically i am running out of injectors in a hurry.

---

Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


Rallies are no place for traitors

What about OMEX rev limiters?

http://www.omextechnology.co.uk/Revlimiters/revlimiters.htm

Checkpoint Racing carries them through Demon Tweeks.

---

Grant Hughes

I already have the MSD, anybody wanna buy it off of me ???

Cheap, $50 including shipping.

---

Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


Rallies are no place for traitors

Fuel cut would be better then spark cut on a turbo charged car, IMHO. That's how it's done on most OEM EFI, at least ford and dodge.

---

Scott Manley
Spokane, WA
86' XR4Ti
37

>
> Again I am reluctant to try anything that says
> Soft Touch on it, especially on my Galant. The
> built in rev limiter is inop so I need something
> to keep me from revving over 6300. Even the 690cc
> injectors are jumping up to 98% duty cycle at like
> 6250 rpm, basically i am running out of injectors
> in a hurry.

If you're still running the factory ECU, Jeff (Keydiver) will burn a custom chip for your Galant for free, set the rev-limit wherever you'd like it.

You can find him on the Galant board http://www.galantvr4.org or on his business site http://www.dsmchips.com.

Cheers, Ted

---

Pure mathematics is the enemy of every truly creative man -- Sir Alec

Scott Manley Wrote:
-------------------------------------------------------
> Fuel cut would be better then spark cut on a turbo
> charged car, IMHO. That's how it's done on most
> OEM EFI, at least ford and dodge.
>
> Scott Manley
> Spokane, WA
> 86' XR4Ti
> 32


maybe I don't understand the workings completely, but wouldn't this cause a lean condition + Boost = very bad things?

---

-Jason

>
>
> maybe I don't understand the workings completely,
> but wouldn't this cause a lean condition + Boost =
> very bad things?
>
>
> 94 Golf
> www.Mack73.com



You do indeed understand the workings basics. The whole point behind me looking for a rev limiter is to avoid fuel starvation I get in high rpms. I already destroyed enough engines and I don't have the slightest intention to destroy this one. Fuel Cut = Disaster + Mo Money Down The Drain. As a matter of fact my car even had a Fuel Cut Defencer at one point to make sure there was always an ample supply of fuel.

---

Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


Rallies are no place for traitors

Mack and Mustafa- You cann't have a lean condition with NO FUEL. Think about it, how can you get detonation with an AFR of 14 to 0? You have to have some fuel to create a lean condition. Whereas with spark cut you may have fuel but no ignition ( and plenty of heat in a turbocharged app.) = detonation = BAD. This is pretty well reseached by the OEMs. All OEM have fuel cut on decel, but how many cars do you hear of blowing up from this? Zero.


mack73 Wrote:
-------------------------------------------------------
> Scott Manley Wrote:
> --------------------------------------------------
> -----
> > Fuel cut would be better then spark cut on a
> turbo
> > charged car, IMHO. That's how it's done on
> most
> > OEM EFI, at least ford and dodge.
> >
> > Scott Manley
> > Spokane, WA
> > 86' XR4Ti
> > 32
>
>
> maybe I don't understand the workings completely,
> but wouldn't this cause a lean condition + Boost =
> very bad things?
>
>
> 94 Golf
> www.Mack73.com

---

Scott Manley
Spokane, WA
86' XR4Ti
37



Edited 1 time(s). Last edit at 05/19/2006 11:22AM by Scott Manley.

Scott if the air & fuel are delivered to the exhaust unburned one *could have plenty of excitement in the exhaust to keep things on the boil when engine speeds drop back to where they should be...

---

JohnLane

Volvo 260turbo AKA The Fire Breathing Monster
Overkill is consistently more fun

Here is the problem with Keydiver chips, they are mostly street oriented and heavily rely on the stock ecu, also against common belief they are a far cry from being perfect. We already broke the code to the Mitsu ECU like Keydiver did and we can load completely customised maps/functions on chips. We already burned a bunch of EPROMs with our parametres, including the rev limiter. They work on other cars that don't have harnesses bastardised by the Russians but not on mine. Until I replace the whole harness i will not be able to see what signal i am missing coming in to the ECU. It is crazy, ECU gets the RPM reading, OBD sends out the real time RPM value signal to logger, tach doesn't work, rev limiter doesn't work. Which brings us to my need for an external rev limiter and an external tach.

---

Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


Rallies are no place for traitors

Or a new harness.

---

Grant Hughes