OpenFlash Tuning Tutorial: Crawford Billet Power Block Mapping changes
 

Hi guys,
As promised, here is a tutorial on how to adjust any of our gasoline OTS map (91 or 93) to work well with the Crawford Power Block. Of course, additional dataloging/testing is always a good idea. But the changes outlined below are easy to implement and will work well once you add BPBs.

Note: This tutorial is only intended for our gasoline OTS maps. I never had too much success with running the BPB on E85.

Using Rom Raider, open up your current OTS map (Stage 1, Stage 2, Stage 2 UEL or Stage 2 EL) view the following tables:

Knock Correction Max Advance A
Timing Compensation Per Cylinder A
Timing Compensation Per Cylinder A

It will look like this:
http://i85.photobucket.com/albums/k4...01025918pm.png

Step One:
Set both Timing Compensation Per Cylinder tables to 0.

Step Two:
In the Knock Correction Max Advance A table, copy the entire 6000RPM row and past it in the next 5 rows (6400, 6800, 7000, 7200 and 7400).

Once you are done, the tables should now look like this:
http://i85.photobucket.com/albums/k4...01030200pm.png

Step 3: Close the windows. Save the file under another name (i.e., Stage 1 BPB A01C).

Step 4: Close and re-open the file.

Step 5: View the three tables you changed and confirm that they changes are there and exactly as shown above.

[Steps 3-5 are just for the sake of safety]

Step 6: Load up the revised BPB map into your OFT and flash to your car. As always, let the engine idle for a minute after first start-up before driving off. Go ahead and run the car. You will feel some good power gains above 6200rpm. Along with the good power gains that the BPB provided between 5200-6200rpm.

Step 7: Take some datalogs of 3rd gear WOT runs (2000-7500rpm) and confirm that there is little to no knock correction. Especially above 6000rpm where you made the adjustments.

That's it!

Cheers,
Shiv

Just ordered my OFT today and have had the BPB for a few weeks now.

Totally stoked!!

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?

i'm trying to update it in romraider, but i'm unable to open the tune.

it always say "Unable to read XML definition. Please make sure the definition file is correct. If it is in a ZIP archive, unzip the file and try again"

wich I did. I put your new XML, selected it, and can't open the tune. (note that i was able to do it with previous tune)

Are you using the XML from the 2.0 or the 2.01 map file? You should be using the one in the 2.01 zip. Did you remove the old definition from the list of XML's in romraider and then add the new one? Several people forgot to do that.

Baring those solutions maybe you could try and re-download the 2.01 zip and try it all again. Maybe something got messed up inadvertently.

i'm using the 2.01 one (never had the 2.0 since there was no solution at that time for BPB) and i've removed the older XML.

i've unziped it twice, but didn't try to redownload it... i will try right away.

i've also double check with the old XML and an old tune to be sure romraider was ok, and it's was working.

it worked.....

redownloaded the zip, extracted it again..... paste it over the folder where i've transfered tunes and xml first, found out that files were duplicated all over with same name....? to realise that the first time, i took the xml and tunes from Mac osx... on my pc....

i know... now i doubt of my intellectual capacity to edit those roms...... :)

made the changes, uploading now!!

here's a 3rd gear WOT pull I did...any feedback?

Upload that to datazap, much easier for everyone to give you feedback

Sent from my SCH-R970C using Tapatalk

Fixed
http://imgur.com/cdQ01d9

I flashed, waited on idle for a few minutes and now I'm not at home but I've looked on the tablet for a few minutes on the highway and I've noticed my advance multiplier fell from 1 to .88 and then at each 5 min it raised to .91, .93 and. 96

Is it normal at the beginning ? Should I worry ? I will post logs once I'm home

thanks! still new at this…

http://www.datazap.me/u/silver-ignit...1?log=0&data=1
@Shiv@Openflash

How many miles are on this reflash? Your IAM is at 1 but you didn't log FLKC or FBKC so its hard to tell exactly whats going on. Based on the dropping of chunks of KC learned through your pull I'd venture to say you've got some knocking going on but if this is a very recent flash your ECU might not of had enough time to adjust the trims.

Log again but this time uncheck VVT Intake and VVT Exhaust and select Knock Correction and FLKC and do another log for conformation.

here is mine
around 50 km done since the flash, 3rd gear pull

http://datazap.me/u/walla-walla/stag...1?log=0&data=1

is it me or it seems like my pull is a bit more lean than the one from silver ignition?

waiting from comments of someone who understand all those parameters!

Its actually a bit richer higher the AFR number = leaner, lower the number = richer.

As @Malt said ditch the VVT intake and VVT exhaust cam parameters and replace them with FLKC (fine learning knock control) and FBKC (Knock correction). it looks like you have a bit of knock but its much easier to tell if you log the correct knock parameters. ;).

If you read the links below will help you understand more

Does the BPB show any gains on an OTS E85 map? Even without any changes to the map itself? Or is it a waste of time.....

In theory the bpb should shift the peak power lower in the rpm range, by shifting the volumetric efficiency. You may loose a bit of peak hp above 6500 or so, but you should still have the benefits of E85 and bpb below that.



So unless you chasing peak hp at high rpm should still be of benefit. Although shiv's comment in the first post in this thread puts a damper on that.

@nelsmar did a good writeup on them http://www.ft86club.com/forums/showt...t+power+blocks

But he was using his own tunes and on petrol but somewhere else i think he got some pretty good results on E85







.

that log was only about 20-25 miles on the fresh reflash…I'll put some more miles on it, add FLKC and FBKC, and log another pull

here, i've registered the required parameters

http://datazap.me/u/walla-walla/stag...-3rd-gear-pull

i think it doesn't appear within the 3rd gear pull, but prior to recording, on highway cruise (6th gear, 115-120km/h), i saw at least once a fl knock correction of 0.38 degree, and after the pull, still on highway cruise, i saw a few knock correction, at around 0.35 degree and 0.62 degree. so.. is it bad?

Your afr look fine fuel trims ok . The odd bit of 0.7 or so knock correction is almost inevitable. hower the -3.5 your getting at high rpm and load needs some action, either run better fuel octane booster or pull about 2 degrees out of the BASE TIMING B table for you ROM at engine loads 1.2 & 1.3 & 1.4 from 6200 to 7400 then see how it looks.
You could even try fuel from a different manufacturer as some blends are better than others

thanks!
i'm not sure i could find better fuel around the area (i'm currently using shell Vpower, wich seems to be the best we can have around here)

so, just to be sure i understand correctly, if on Base Timing B table at "1.2 engine load" at "6400rpm" i have the value 25.20, i should lower it to 23.30. is that right?

also, fl knock correction, does it means my engine knock, or that it pulled a few timing degrees to not knock?

thanks for the help, I read a few of your thread also, very helpfull, but there is so much to learn on this! :)

Yes you got it correct for table values

any flkc or fbkc knock correction means your ECU is detecting that amount of knock and then making adjustments to timing to correct the knock you logging the adjustments the ecu is making. There are limits to the correction the ecu can make.

I am learning all the time as well :)

http://datazap.me/u/silver-ignition/run2?log=0&data=1

@Malt @Shiv@Openflash @steve99

how does this one look to you guys?

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.

made the suggested correction, and it really helped!

http://datazap.me/u/walla-walla/bpb-...0&data=1-11-12

i removed 1 degree at 6 000 rpm on 1.2/1.3/1.4 load, and 2 degree at higher rpm on same load!

thanks for the help @steve99, now as I understand, it's doing great! (even if i sometime have knock correction, but it think it is not a dangerous situation under .7?)

Yes that right if its just random spikes of 0.7 or less its ok, if its consistent and at same rpm/load point it might be worth pulling 0.35 or so if your rearly keen.

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.

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

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.

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 :party0030:

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.

@Shiv@Openflash .....

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

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

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