I built a patch harness using a HKS patch harness. Currently It is wired up to use either speed density using the stock MAT sensor and either MAFS. I just drove it around a little tonight to get the fueling on the speed density close. The timing is off so I need a driver so I can back off the timing while someone else drives. It pings a bit in the high load, low rpm area, somewhere the stock ECU adjusts timing due to knock. I think I am close......but I cant go over 3500~4000 due to the Hitachi CAS. The CAS in the pic is the R33 Hitachi CAS, but the R34 plastic version is currently installed. Here are some pics:
There is a new trigger disk on order from DIY autotune to put in a spare CAS, but the mail is slow and I havent gotten it yet. When I am satisfied on the tuning with my car, the Megasquirt will get installed in this engine:
Here is my current fuel table, obviously without any tuning above 3500rpm. All of it was done with VE analyze live.
I have been driving it for a little over a week now with the MS in it. I split the VE map as I am used to the way the factory ECU does the A/F correction. I have the origional VE map as Fuel VE Table 1 and a second A/F correction map on Fuel VE Table 2 to enrich the AFR for boost and higher load. I find it easier to change the AFR in the correction table when I want it richer or leaner in an area and the VE map will let me know if the VE has actually change due to mods or temps. I find this easier for me, mods (table 1) tuning (table 2).
Sounds tough though.
