OpenFlash Tuning Tutorial: Crawford Billet Power Block Mapping changes

[steve99]

Originally Posted by Walla Walla

every time that it knock, does it go to a "safe map" ? if so, i should better try to track down all those spikes? or is it kind of overkill to tink of that?

Only time it goes to safe map is if somethng is broken eg a sensor or some situation where the ecu decides the problem carnt be solved you will generally get a CEL ,light and car will be very sluggish.

If you read the knock thread it will explain see below, basicly it just pulls timing on knock, just chase it if its consistently happening.

[Silver Ignition]

Originally Posted by steve99

Your on 93 octane fuel ? with 93 octane tune ?

reason I ask is your IAM=0.55, so its been knocking quite a bit somewhere outside that log.

Their is some positive FLKC so the ecu is returning some timing.

If that IAM has not recovered to 1, just plug in your OFT and log on screen . then it looks like you might be better on the 91 octane tune.

Yep it's a 93 tune with 93 octane gas (or so the sticker on the pump says)...so I want to monitor the IAM to see if it comes back to 1? If it stays around 55, should I use the 91 tune with my "93" fuel? Will I have to reset the ECU or will it automatically begin to re-learn the IAM?

[Walla Walla]

Originally Posted by Silver Ignition

Yep it's a 93 tune with 93 octane gas (or so the sticker on the pump says)...so I want to monitor the IAM to see if it comes back to 1? If it stays around 55, should I use the 91 tune with my "93" fuel? Will I have to reset the ECU or will it automatically begin to re-learn the IAM?

you should try to capture a full open throttle log on 3rd gear (from 2000rpm to 7600rpm) it will give a better idea

if you switch to 91 tune, it will reset everything. each time i did flash ecu, IAM started at 1.0, then moved a bit (lower i got was .88) and then replace itsefl within 50 km to 1.0

[Malt]

Originally Posted by Silver Ignition

Yep it's a 93 tune with 93 octane gas (or so the sticker on the pump says)...so I want to monitor the IAM to see if it comes back to 1? If it stays around 55, should I use the 91 tune with my "93" fuel? Will I have to reset the ECU or will it automatically begin to re-learn the IAM?

If my IAM was at .55 with the new 93 octane map there would be no hesitation on my end to do one of the following:
Figure out what's causing the knock (bad fuel?) or swap over to the 91 octane maps and still use 93 octane. The previous maps shiv has given us were all based on 91 octane to begin with and these new 91 maps are even more tweaked, so its not like you'll lose all that much. Then again, you could just let the trims learn a bit more and take more logs. Its highly likely that once the ECU learns all the trim conditions things will fix itself. You could also try to scale your MAF to see if that helps things along (if your trims are excessive).

I also have some slight knock at lowish RPM and high load in a higher gear, which is to be expected. The knock you are seeing is slightly concerning to me, but I'm not a pro tuner or an expert on these matters. I've contemplated swapping back to the 91 maps just for a margin of safety as the maybe 1-2 HP we're getting with these new maps isn't worth the knock that some of us are getting due to poor fuel.

Where I'm noticing my knock is during throttle transitions between no throttle and part throttle. The knock is very slight but it appears that STFT is pulling back excessively as soon as you get back on the throttle which is causing a lean condition, which results in the knock event. It rapidly corrects itself but I'm wondering if there is a way to correct the issue without resorting to dropping down to the 91 maps. @Shiv@Openflash might be able to shed some light on this matter.

[Silver Ignition]

Originally Posted by Walla Walla

you should try to capture a full open throttle log on 3rd gear (from 2000rpm to 7600rpm) it will give a better idea

if you switch to 91 tune, it will reset everything. each time i did flash ecu, IAM started at 1.0, then moved a bit (lower i got was .88) and then replace itsefl within 50 km to 1.0

I'll do one more 3rd gear pull as it sits, from 2k all the way up to redline and post up tonight. I'll load a Stage 1 91 BPB-modded map onto the OFT tonight and do another 3rd gear pull with that map tomorrow.
Easy to do safely on the way home from work because there's an unused airstrip near my job

[Kodename47]

Originally Posted by Malt

If my IAM was at .55 with the new 93 octane map there would be no hesitation on my end to do one of the following:
Figure out what's causing the knock (bad fuel?) or swap over to the 91 octane maps and still use 93 octane. The previous maps shiv has given us were all based on 91 octane to begin with and these new 91 maps are even more tweaked, so its not like you'll lose all that much. Then again, you could just let the trims learn a bit more and take more logs. Its highly likely that once the ECU learns all the trim conditions things will fix itself. You could also try to scale your MAF to see if that helps things along (if your trims are excessive).

I also have some slight knock at lowish RPM and high load in a higher gear, which is to be expected. The knock you are seeing is slightly concerning to me, but I'm not a pro tuner or an expert on these matters. I've contemplated swapping back to the 91 maps just for a margin of safety as the maybe 1-2 HP we're getting with these new maps isn't worth the knock that some of us are getting due to poor fuel.

Where I'm noticing my knock is during throttle transitions between no throttle and part throttle. The knock is very slight but it appears that STFT is pulling back excessively as soon as you get back on the throttle which is causing a lean condition, which results in the knock event. It rapidly corrects itself but I'm wondering if there is a way to correct the issue without resorting to dropping down to the 91 maps. @Shiv@Openflash might be able to shed some light on this matter.

It depends on where the knock is. The only differences between the 91 and 93 maps are 1.05 degrees of timing over 6k. That's stage 1, but I'd guess similar for maps with EL/UEL manifolds.

[Kodename47]

@Shiv@Openflash .....

Originally Posted by Kodename47

Shiv, what's the reason for adjusting the rear cylinder compensations for this and not for the other tunes? Which I guess asks the question as to why they are there in the 1st place?

I know that zeroing out the compensation is a good way to make power but at what cost?

[Silver Ignition]

Originally Posted by Walla Walla

you should try to capture a full open throttle log on 3rd gear (from 2000rpm to 7600rpm) it will give a better idea

if you switch to 91 tune, it will reset everything. each time i did flash ecu, IAM started at 1.0, then moved a bit (lower i got was .88) and then replace itsefl within 50 km to 1.0

Originally Posted by Malt

If my IAM was at .55 with the new 93 octane map there would be no hesitation on my end to do one of the following:
Figure out what's causing the knock (bad fuel?) or swap over to the 91 octane maps and still use 93 octane. The previous maps shiv has given us were all based on 91 octane to begin with and these new 91 maps are even more tweaked, so its not like you'll lose all that much. Then again, you could just let the trims learn a bit more and take more logs. Its highly likely that once the ECU learns all the trim conditions things will fix itself. You could also try to scale your MAF to see if that helps things along (if your trims are excessive).

I also have some slight knock at lowish RPM and high load in a higher gear, which is to be expected. The knock you are seeing is slightly concerning to me, but I'm not a pro tuner or an expert on these matters. I've contemplated swapping back to the 91 maps just for a margin of safety as the maybe 1-2 HP we're getting with these new maps isn't worth the knock that some of us are getting due to poor fuel.

Where I'm noticing my knock is during throttle transitions between no throttle and part throttle. The knock is very slight but it appears that STFT is pulling back excessively as soon as you get back on the throttle which is causing a lean condition, which results in the knock event. It rapidly corrects itself but I'm wondering if there is a way to correct the issue without resorting to dropping down to the 91 maps. @Shiv@Openflash might be able to shed some light on this matter.

Here you go...full 2-7.6 run...IAM is now between .96 and 1...maybe it just had to learn? Same tank of gas on all three logs...anyways, here goes;
http://datazap.me/u/silver-ignition/...l?log=0&data=1

[steve99]

Originally Posted by Silver Ignition

Here you go...full 2-7.6 run...IAM is now between .96 and 1...maybe it just had to learn? Same tank of gas on all three logs...anyways, here goes;
http://datazap.me/u/silver-ignition/...l?log=0&data=1

It still pulling -3.5 degrees at around 6500 maybe you can try fuel from a different supplier or switch to 91 map that has leass advance over 6000

[Walla Walla]

Originally Posted by Silver Ignition

Here you go...full 2-7.6 run...IAM is now between .96 and 1...maybe it just had to learn? Same tank of gas on all three logs...anyways, here goes;
http://datazap.me/u/silver-ignition/...l?log=0&data=1

could also try removing a few degree of advance timing around 6 000 and more, similar to what i did and keep the 93 octane tune? since you never know exactly what kind of gas quality you will have, just to be safe (consider this as a not know-it-all advice!)

[Silver Ignition]

Originally Posted by Walla Walla

could also try removing a few degree of advance timing around 6 000 and more, similar to what i did and keep the 93 octane tune? since you never know exactly what kind of gas quality you will have, just to be safe (consider this as a not know-it-all advice!)

That kinda stuff scares me…maybe I'll e-mail @Shiv@Openflash for some custom work

[Silver Ignition]

Originally Posted by steve99

It still pulling -3.5 degrees at around 6500 maybe you can try fuel from a different supplier or switch to 91 map that has leass advance over 6000

yeah that's a really weird spike…that's right in the wheelhouse where this thread is aimed too…6200-6700

[Silver Ignition]

can you guys tell me if I'm in the right area here…

should I be pulling those 20.62's back to 18.16 or the other 18.87?

[Malt]

Originally Posted by Silver Ignition

can you guys tell me if I'm in the right area here…

should I be pulling those 20.62's back to 18.16 or the other 18.87?

Just use the 91 octane maps and try some logs. The only difference between the 93 and the 91 is the timing is 1.05 degree higher on the 93 maps above 6k like @Kodename47 pointed out. Far simpler and less chance for you to accidentally mess something up unintentionally.