RomRaider

Car: STi, stage 2, USDM MY05

Situation: The car runs very good. With the newest ecu and logger definitions I experamented with the 'timing advance primary 1',2 and 'timing advance additive'. The response was VERY different than I expected. Starting with my known good ROM I altered 'timing advance primary 2' and 'timing advance additive'. My 'MAP Ratio (primary)' was and is always zero. Given the description in the 'timing advance additive' table properties window, the ecu should only be looking at 'timing advance primary 1', so any change in 'timing advance primary 2' should only be applied if the 'MAP Ratio (primary)' increases from zero. BUT the car had numerous knock events, and the only changes to the rom were in 'timing advance primary 2' and 'timing advance additive'.So...

Questions: Has anyone logged and noticed their 'MAP Ratio (primary)' anything other than zero? If mine stays at zero is that acceptable? I'm assuming a prolonged period of time without knock will cause the 'MAP Ratio (primary)' to increase, is this correct? Given my result, is it possible the equation for primary 1 and 2 and additive may be something other than what is stated in properties window?

All responses are appretiated.

I haven't look into what would cause the 'map ratio(primary)' to change with the usdm 04-06 STi. With the 07 USDM STi, the ratio between primary 1/2 is seemingly based on cruise/non-cruise conditions, based on what can be determined by logging. I assumed that the same might be the case for the usdm 04-06 STi, but apparently not. Your additive advance is what is knock based or based on conditions in which knock might occur. You should carefully monitor addtive advance by logging "Ignition Timing Advance Additive*". You can disable the additive advance if you want more simplified tuning by enabling the alternate advance mode fix.

Log total timing and see what it is doing. The additive table on the 04-06 STIs gets added in often (depending on knock or lack of and some other conditions). The same with the 07 STI with Advance B (well it used to be called that). I actually use these additive tables now.

Does the 05 STi 32 bit provide "Ignition Timing Advance Additive*"? I see "Ignition Timing Advance", but not additive. I did download the new (as of 9.8.08) defs. In the past i've had problems with RR using hidden shortcuts and I may need to recheck and make sure I deleted all the old defs.

Well, you need to make sure you uninstall all previous versions of RomRaider and shortcuts. An easy way to tell if you have the newest defs installed properly would be to look at Engine Load, it should be "Engine Load (4-byte)". If it is "Engine Load (Direct)" then you have old defs installed. And yes, the 05 sti has this parameter.

THANKS (again) merchgod. I've been using the old defs without realizing it.

So is it still kosher to run the 04-06 STIs Advance A and B identical, and zero advance C, for "always-the-same" timing?

I'm confused as to why the new option to disable alternate advance mode is available in the editor when one can simply make the previously mentioned changes and get the same timing advance every time.

Because it also impacts the map switching for the other maps and potentially other logic. If the factory engineers were going to eliminate the additive advance, they would do it precisely the way that my "fix" works (which is what they do for non-STis which have the same logic but it is disabled - they also zero out the additive map(s) but that is merely for their own reference)

The advance tables are no longer called a,b,c btw.

OK, I understand, thanks for that Bill. Sorry about the A, B, C thing... old habits die hard?