Knock fix with Australian Fuel 98/100 RON

[4wheelinls1]

Originally Posted by steve99

If you look at the tunes in first post OFT TUNES, they changed the ignition maping and cam timings extensivly compared to stock map

Found same thing with iat and knock , have made the iat vs timing retard tables cut in slightly earlier and increased retard around 3000 rpm where stoch table applied no retard

Yep definite differences. I have less in the base but more in ignition advance table. than the 100 oct. I removed more from the transient ignition retard around 2000 to 3000 rmp and made IAT/coolant multiplier more aggressive from 40 deg c. I'm using BRZ edit. Still messing with the cams around the torque dip

[Kodename47]

Don't forget there's a table for the amount of IAT retard dependant on load and rpm as well as the base temperature table.

[myioz86]

Originally Posted by steve99

Anything to boost the octane should help, as long as you follow manufacturers (torco) directions should be fine.

Have you tried united 100 octane fuel ??

If you have non-ethanol 98 octane you can add 10% or so of E85 this can boost your octane rating a couple of points.

steve99 i tried some of that torco in the tank 1/2 what the manfactors rec and the difference is amazing . i raised the fuel octane by+2 and even that amount made a difference. the car runs smoother ,quiter and pulls much harder. i might just use the least amount possible and make the most of the tune with that in it. i think shives stage 2 uel tune works well with this in it. now all i have to do is maf setting.this stuff can raise your octane up to +14 that would be wild but wont go there

[steve99]

Originally Posted by myioz86

steve99 i tried some of that torco in the tank 1/2 what the manfactors rec and the difference is amazing . i raised the fuel octane by+2 and even that amount made a difference. the car runs smoother ,quiter and pulls much harder. i might just use the least amount possible and make the most of the tune with that in it. i think shives stage 2 uel tune works well with this in it. now all i have to do is maf setting.this stuff can raise your octane up to +14 that would be wild but wont go there

Basicly once you IAM is 1 and no other significant knock then that is the max power your going to make with that tune as the ECU will not advance timing any more it running the max advance in the tables , you could use 130 octane and no further gains would result , you then have to change mapping to take advantage of the higher octane fuel, but even then their are limits

scaling your MAF is worth it even on stock intake as its often "out" by about 8% or more so if you can get fueling error down to less than 3% you will have a smoother drive and tighter control over your AFR over whole rev range which can also help reduce knock. It also means the tune is running closer to what the original tuner set in terms of AFR.

[myioz86]

Thanks for that steve99 , have not made any changes yet just feels like the fuel octane ratting is matching the tune of shivs much better now. will check what you told me to and see how it looks tonight.As its only costing me $7.50 extra for a tank of 38lt bp ultamate with 240ml of torco to raise octane up +2 = 100ron fuel i think its well worth it.

[Turdinator]

Originally Posted by jamesm

Whenever i change the port ratios i just change all 3 tables at once. I've found that always running the minimum amount of port ratio necessary for a given setup will allow for significant gains in terms of knock suppression on pump gas.

I essentially monitor Direct Injection Time Final and/or DI requested volume (the latter of which is only available in an unreleased RaceRom beta, so not much use to most folks). I'll then gradually bring down the PI ratio until i'm ~10-20% under what i consider to be a safe limit (1ml or 6.5ms depending on the param that i have access to).

I used this technique on an NA tune last night and was able to make considerable horsepower up top in the most knock-proned area of the curve. With stock port ratios knock up there was an issue @ ~15-17whp over stock (can't remember the actual timing or AFR values, i'd have to look), and by the time i brought down the port ratio and added a couple other tricks we were at 29whp over stock with no knock in sight.

something to consider trying if you're fighting knock above 6500rpm or so. On an NA car you'll never get close to any limitation, even with 0% port ratio across the board.

@jamesm posted this in the MAF scaling thread but I thought it might be something for those of us exprerincing knock due to shitty fuel to think about.

[Wayno]

Here's Steve's changes made to G and I 700, A00 and A01 series roms for Stage 1.

[keen as]

Any further info about the detail of the changes? Thanks

[steve99]

Originally Posted by keen as

Any further info about the detail of the changes? Thanks

As I understand it @Wayno copied in the Base_Timing_B ingnition map changes I did for Manual car ie A01G roms as per Ist post in this thread and copied them to the automatic "I" series roms as well at the earlier 700 and A00 roms

[dtek]

Originally Posted by Wayno

Here's Steve's changes made to G and I 700, A00 and A01 series roms for Stage 1.

I'm seeing an error when I add map to OFM:

"The checksum of ...A00I... is wrong"

Tried resaving the bin out of RomRaider where it prompts to correct the checksum, does the same error. Any tips?

[Wayno]

Originally Posted by dtek

I'm seeing an error when I add map to OFM:

"The checksum of ...A00I... is wrong"

Tried resaving the bin out of RomRaider where it prompts to correct the checksum, does the same error. Any tips?

I didn't modify this one personally, I just pulled it from the aussie oft facebook group. I think only one person is using it there.

If you can use romraider then it's easy enough to do your own using steve's first post, copying the table from his G map.

[steve99]

Originally Posted by dtek

I'm seeing an error when I add map to OFM:

"The checksum of ...A00I... is wrong"

Tried resaving the bin out of RomRaider where it prompts to correct the checksum, does the same error. Any tips?

+1 on what @Wayno said above.

Open the ron in romraider and check a table like the timing table and see it look ok , the OFT should correct the checksum when it writes

Check yo have latest version of RR the rearly old ones did not do checksums correctly and the OFT had to do it for you but the current version should sort out checksums make sure you save rom after you click fix checksum

[Wayno]

Originally Posted by steve99

+1 on what @Wayno said above.

Open the ron in romraider and check a table like the timing table and see it look ok , the OFT should correct the checksum when it writes

Check yo have latest version of RR the rearly old ones did not do checksums correctly and the OFT had to do it for you but the current version should sort out checksums make sure you save rom after you click fix checksum

As far as I know, when Dean edited them, he didn't fix any checksums, at least that's what he told me to do for the powerblock ones.

[dtek]

Originally Posted by steve99

+1 on what @Wayno said above.
Open the ron in romraider and check a table like the timing table and see it look ok , the OFT should correct the checksum when it writes

OK, thanks for the input but not having any luck.

In RR (version 0.5.8) I can open the BINs, it warns of a corruption or checksum issue but still opens the tables, all looks OK. Then when I do a 'save as' it prompts to proceed to correct checksums, which I 'ok' of course.

In OFM, when I try to import the new BIN, I get these three pop ups in sequence:

https://imgur.com/a/8dqFg

So end result is, no adding of the map to OFM possible. Pretty frustrating.