I was wondering if anybody could post a good spark map, or give me any pointers for my map. The car is a stock 97 besides a maf delete, Goodwin headers, a RB catback, an MS3 pnp pro. This spark map is just the one that came preloaded on the USB that came with my ECU. The only things I've changed is the idle section (I just use idle advance now), and the 100kpa row. I'm limited to 91 octane CA gas (real bummer). I've never noticed any form of pinging/detonation with this map. I do not have easy access to a dyno, otherwise I'd handle this there (the nearest one is 150+ miles away). Thanks in advance (Get it?).

 

This was my 95 NA BP after a dyno tune, was safe for 98 EU octane(93 US ?)




I'd remove that silly negative timing in the bottom row / ricer kid artificial pops and bangs.

 

You may find the 2000-3000 rpm range is too aggressive, causing a little knock on tip in. You could probably pull 4-6 degrees out. You’re only increasing ~1.5 degrees from 2000-3000, I’m usually closer to 4. High load is ok, but you could probably pull 2 degrees out at 7300, 4 at 2000, and interpolate between.

 

I pretty much did exactly what you described here, and tip in/rev matching does feel better, but the car feels like it lost some pep in it's step for sure. That said, I also put the stock airbox back in (including the maf), so I'm not totally convinced it's the timing reduction that's causing that. I'm going to swap intakes back over and see how the car feels again to determine whether it's timing or intake related (my hunch).

 

You should be able to see that in air flow. If you suddenly dip rich at higher loads that you didn’t used to, your intake is more restrictive.

 

Well that's the interesting part. I noticed it was running rich afterwards, which made sense to me, but now after sitting for a couple of days it suddenly seems to be running leaner than before, so I have no clue what's going on there. I need to pull a couple of datalogs and see what's going on.

 

I made slightly smaller changes than you recommended (I did this back when you initially replied, I'm just finally actually replying here) and it definitely helped tip in, especially on downshifts. It both feels better and AFRs are more consistent on tip in. Just thought I'd finally get around to responding to say it helped. Just need to get back to stock for smog and then I can start tackling why my AFRs in TS are so sporadic..