AVCS affects fueling

Since I am increasing my VE with AVCS timing, I need to add more fuel. I've had this map for a few days but I am still having knock across the ranges.



I'm going to set my tip-in at the 5.2% cell. Let's see if this works since the smallest throttle % where knock occurred happened at about 4%.

Crossed 400bhp!

I've done a few rounds of AVCS tuning, mainly concentrating at my lower RPMs. I did a dyno run on last Friday night to see how it looks on a dyno run and I got more than 400bhp:


I did a second run which was a partial pull from 3500rpm and it was still more than 400hp and 462Nm@5752rpm:


But look at the speeds recorded - > 300km/h. I don't I hit those.. sorry to disappoint, I don't I achieved 400bhp.. :-(

Anyway, the runs above was done with a slightly higher octane (SPC 98) instead of Petronas and my fuel tank was almost empty (but still no fule indicator light yet).

Here's my current AVCS map. It feels ok but I adjust my tip-in, unlike my previous map:


I'm going to run on this for the next few days first to see how my car adjust to Petronas fuel since the last few days, I've been running this on SPC's 98.

One thing I am disappointed though is that I've not been able to widen my torque range nor have I been able to bring it lower. I'll need to do more reading up on this.

On the right track with my AVCS

My last AVCS map feels much better! I feel like I am on the right track now. But I do notice that it takes a while for the car to feel much better after re-flashing meaning some significant ECU learning is required. This is so unlike the other changes I've done. Surprising..

Got my Track Commander!

My Track Commander arrived by UPS yesterday. It was shipped to my parent's place but my brother didn't have enough money to pay the GST so it was not delivered. I had to go down to Changi to retrieve coz I didn't want to wait till Monday.

With this, now I can have more accurate lap timing at my track sessions. The device uses GPS to measure lap timings.

Here's the product website: http://www.rlc.com/RLC_Racing_Web_Site/Micro_Pod_Track_Commander.htm

I can't wait to test it out on the track. Costs me USD$1,190 coz I got the 10Mhz GPS.

Feels like crap

My last AVCS tune feels like crap. No power at all in my low end. I'm reverting back to my previous tune, increasing the areas close to where i hit my max boost (around 4000rpm) and also reduce slightly my low end.

Here's what it looks like:

AVCS Tuning 2

Ok, let's increase my AVCS timing:



Let's see how this goes :-)

Dyno figures for AVCS tune

Here's what my dyno graph for the last AVCS change. It's slightly down but I had my wife and son sitting at the back adding about 70kg more and I'm on half tank of gas.
335hp@6198 rpm, 412Nm@5486:


I don't think the AVCS tune will affect my high end much coz I didn't change my high load areas. But I do feel that my low end has much better throttle response.