I have been playing around with my piggy software, just getting used to it. I started to modify my fuel map a little (no downloading to ecu) and was starting to feel like I knew what I was doing. . . . When I realized there is a MAP B. What's the diff? What does map a and b do? Thanks for the help.

-Rich as Heck.

 

I think!....

Map A would be your High Octane Map.
Map B would be your Low Octane Map.

Ususally tuners play around with the High Map. Map B is usually a back=up incase you run a lower octane fuel that the high map can't handle. Basically a Fail-safe for the ECU. But as for what I've read, the EVO tuners usually have their HIGH OCtane map mirrored over to their LOW Octane map.

I need someone to back me up on this...

 

On this Piggyback that RRM offers, the map A is the fuel and map B is the timing. I have fooled around with timing just a little but nothing major. I am trying to figure out EXACTLY what the values adjust so I can properly tune it and maybe eek a couple more HP out of it.

 

cool. Thanks for helping out a NOOB! I definitely won't be messing around with the timing.... 2 more questons then,

1. is it a) a low(a) and high(b) octane maps?
or
2. a)fuel (I know It showed the rpm/fuel underneath) b)timing?
oh, and
3. Say I leaned it out a bit (I'm still running in the 14's. I know they say for our cars, 12.4 (or so) for high octane and 13 something for low octane... Will leaning it out without adjusting timing screw things up? Thanks again folks!

 

I am not familiar with high/low octane maps with the piggyback. There is only a Map A, the main map. Also, I think you are confused a little on the Air/Fuel stuff. Do you have a wideband???? If you have a wideband and a lot of time a patience. Take the map preloaded on the ECU, save it somewhere. Then, create another map to tune with from the basemap. Drive your car around and just monitor where the Air/Fuel ratio is running. IN GENERAL below ~12.5 is too rich and about ~13.5 is too lean. You are aiming for right around 13 on 91 octane gas. Decreasing the values in the boxes on the software leans the car out and vica versa. Generally, the base map is tuned from 3k RPM's+ for stock or near stock cars. If you are modified, which you are a little bit. Intake/exhaust/Headers, the base tune is off by a bit. Just go through and start trimming fuel WITH THE WIDEBAND's HELP!!! As you rev your engine, you will notice how the Blue box highlights boxes in a stairstep pattern on the table which is basically a graph of RPM's to Manifold Pressure(?). The Air/Fuel ratio your wideband is reading is coming from that RPM & Manifold pressure box. You want to get familiar with where the highlighted blue goes when accelerating, cruising, idleing etc. And change those values for the most part as well as the values around them. In the end you should get a stairstepping pattern similar to


Where the dashes indicate the boxes you have changed the values for.

Sorry for a long rambling post as it is VERY hard to describe without showing it to you.

 

Also, TAKE SMALL STEPS WHEN TRIMMING FUEL! The shop that was helping me tune went from a 10 to a 9.5 at 1500RPM's and the car was stalling at about a 20AFR. As you move up in the RPM's and pressure, you will need to have values much less than that. At the very bottom right of my table, some of the values were in the 6's.

 

ONe is timing and one is fuel. Timing one is disabled unless you have the hardware box to take advantage of the extra map.


ROAD/RACE

 

Hardware box? Info please!!! ME WANT!

 

its a timing box that rrm hasnt offered yet that gives you contro1 over the timing, a coup1e of their own guys are tryin it out with the rrm camshaft conjunction

 

We do offer a timing and fuel box for Lancer and RA turbo applications. THey are special order only so call if you are serious. There are a few boxes out there as we speak. They can either be additional injector style or big injector style.

ROAD/RACE