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MSD box won't allow us to raise the rev limiter, right?
God I hope I am wrong, otherwise we will have to wait till AFX comes up with an ECU for us.

How about a simple mod, like modifying the RPM signal wire to the ECU so it will think I am running let's say 7kRPM while I am actually running 8K RPM. something that would drop the RPM voltage a bit this way I will have the power gain from reving high, but the ECU still thinks I am within the specs.

Is not ignition timing and fueling is load dependent, I mean will messing the RPM signal would effect the fuel mapping or timing?

Any ideas? Come on guys, this is for the sake of 2GNT members who still wanna stay NA. :)

Adel

"MSD box won't allow us to raise the rev limiter, right?"

Right!:( So we will have to wait for AFX

Skrilla
'97 Base Talon NA
"Technology: The Only Replacement for Displacement"
"Peace and Turbo Grease"

It's times like these i wish i had to eclipses one for proven mods and one (guinne*sp)pig mods and experiments.



chris
AIM:blitzdsm1
e-mail:blitzdsm1@aol.com

>MSD box won't allow us to raise the rev limiter, right?

Yeah you are right :-(

>How about a simple mod, like modifying the RPM signal wire
>to the ECU so it will think I am running
>let's say 7kRPM while I am actually running 8K RPM.
>something that would drop the RPM voltage a bit this
>way I will have the power gain from reving high,
>but the ECU still thinks I am within the specs.

Be very careful with this, especially with you AFC, you would have to alter the signal AFTER your splice for the A-AFC. The Neon guys have actually done somethign similar by cutting the mph signal in half to defeat the fuel shut off at 120mph.

>Is not ignition timing and fueling is load dependent, I mean
>will messing the RPM signal would effect the fuel mapping
>or timing?

This I'm not sure on... but here are my thoughts:
1. idle: by modifying the tach signal to the ECU I think you will adjust idle and I think the car would idle at a higher rpm.
2. If you can figure out how much to adjust the signal and just be off by a little then you could trick the ECU into thinking that when the car is at 8500rpm that it is really 7200rpm But this brings be back to might be idling at 2000rpm...
3. As far as fuel goes If you do all your mods after the S-AFC you will have true readings at the S-AFC and be able to tune from there... to make any corrections fuel wise that need to be done. So I think you could make up for it...

Summery: I think the ideal way to do this would be a very complex piece of circuity that modifies the signal based on how strong the signal is, so at idle it left it alone and the higher it got the more it weakened the signal, so at 8500rpm it reads the voltage for 7200rpm... could I do this? Highly doubt it, I'm not that good. Can it be done? Probably. Maybe using a computer CPU and some code with a simple I/O card... Of ocurse by the time you put the money and reasearch into figuring this out it may be more worth your time and money to buy the stand alone fuel controller... I'll wait for an AFX CPU unless someone figures out a good way to do this...

"Claim Victory in your heart, and the universe will follow."
Michael J. Kulaga e-mail: Michael_97RS@2gntDSM.zzn.com
aol IM: MJKulga Website: http://highlander.dsmpower.com/

Injen CAI w/ K&N Breather Filters, AFX UDP, 55mm TB, GS-T Muffler, FU/RU/RL STBs, Front NRG Susp. Motor Mount Ins., Red Silicone Hose Kit, 8.5mm Magnecor Wires, Bosch Rapidfire Plugs, TSW Blade 17x7.5, Bridgestone Potenza RE730 215/45ZR-17. Front KVR Cross-Drilled Rotors and Carbon Fiber Pads, S-AFC, A/F Meter

And in my Room: Rear disc brake conversion kit, SS Brake Lines, Rear KVR Cross Drilled Rotors and KVR Carbon Fiber Kevlar Pads, SS Clutch Line, Rear Motor Mount Ins., EGT

Waiting for from RRE: Front Lower Tie Bar

Waiting for: Intake Manifold being ported/polished

My first thought was a sort of modified VC1 for a voltage clamp on the sensor output.

When i think about it, i don't think it's possible.

The tach feeds off the crank angle sensor, correct? Our crank has notches and counterweights machined into it picked up by a magnetic sensor (crank angle sensor) so it's output looks something like
``|_|`|_|`|_|`|_|`|_(fire)______60* turn_______|`|_|`|_|`|_|````` (repeat)

It works off of voltage peaks and lows as the crank moves under it. I doubt, without ECU modification, that there is any way to modify this signal to allow RPM over 7300.
______________________________________
-Dino Yancey
I'm so bad, i should be in detention.


Get the Mitsubishi Technical Information manual for the 95-99 Eclipse HERE!
http://www.heavenz-not-0verflowing.com/files/dsmmanual.pdf

Doesnt raising the RPM hurt the car?

-Nick

When you rebuild the valvetrain of the engine with stiffer or double valve springs, titanium retainers, new cams, new valves, cam gears, and I think there are a few more things that I have yet to find out. You can run to a much higher red line. I am sure that some of the guys on here can list all the parts required after they finish with their valve trains.




KYB AGX Struts
Neuspeed Sport Springs
5 Strut Bars (2 F/U, F/L, R/U, R/L)
Sprint Front Camber Kit
$15 Rear Camber Kit
Ported Intake Manifold
Ported Throttle Body
Custom 2 1/4 inch exhaust
Empty Catalytic Convertor
225/50/16inch Wheels and Tires