HOW TO: modify OFT tunes for Socal 91 oct. VIDEO TUTORIAL ADDED

[solidONE]

Originally Posted by JB86'd

@solidONE Check out the temp compensation table

This is my Base Timing and compensation tables for STG1 CA91 vs STG1 OFT93 for your reference.

[JB86'd]

First post updated, now running Wayno's smoothed Base Timing B and custom IAT Compensation

[cookiesowns]

Originally Posted by JB86'd

First post updated, now running Wayno's smoothed Base Timing B and custom IAT Compensation

Nice! Can you post a screenshot? Is this with Wayno's helpful tip of a flat KC Advance table with corresponding changes on timing?

[JB86'd]

Originally Posted by cookiesowns

Nice! Can you post a screenshot? Is this with Wayno's helpful tip of a flat KC Advance table with corresponding changes on timing?

The screenshot is updated in the original post. Yeah, I just copied Wayno's Base Timing B over to my tune, no need to mess with the KC advance table afaik.

[Wayno]

Originally Posted by cookiesowns

Nice! Can you post a screenshot? Is this with Wayno's helpful tip of a flat KC Advance table with corresponding changes on timing?

The released tunes don't have flat KCA, only the files used for 3d mapping the timing does.

[cookiesowns]

Originally Posted by Wayno

The released tunes don't have flat KCA, only the files used for 3d mapping the timing does.

So I should not run a flat KCA table for daily usage?

[steve99]

Originally Posted by cookiesowns

So I should not run a flat KCA table for daily usage?

Their is no real advantage in doing so unless you want to see knock easily using the KCS value. ie if its flat any deviation is knock. But be have FBKC and FLKC parameters to see knock much easier.

although that KCA table looks like a random array of numbers I suspect the subaru engineers designed it that way to allow more knock correction to take place in knock prone areas when IAM drops. and/or drop the timing larger amount in certain areas as IAM correction acts on KCA values only.

[Kodename47]

Originally Posted by steve99

Their is no real advantage in doing so unless you want to see knock easily using the KCS value. ie if its flat any deviation is knock. But be have FBKC and FLKC parameters to see knock much easier.

although that KCA table looks like a random array of numbers I suspect the subaru engineers designed it that way to allow more knock correction to take place in knock prone areas when IAM drops. and/or drop the timing larger amount in certain areas as IAM correction acts on KCA values only.

This is very true. You don't really want the IAM to reduce timing at lower load, just let FBKC take care of that. If you want a flatter advance table so that the base timing is easier to read then I would suggest keeping the values in each load column the same and increase them as the load increases. Mine goes from 0 to 5/6 degrees, use the stock table as a guide

You can use my timing adjust tool to play around.

[solidONE]

You guys are some of the most helpful mofo's on here that's not trying to sell something. lol High fives all around!

[thambu19]

@steve99 Are you saying the Stock cal is more knock limited that the Stage1 cal running the same fuel? I find it difficult to believe because both cals have similar spark timing until close to WOT or 95% VE and Stage 1 cal has less Exhaust phasing by about 25deg at places although Stage 1 cal uses a tad more intake phasing at the same places overall it should make the engine knock a bit more than stock

[thambu19]

Usually when the cam overlap is dialed out the flame speed increases making it knock earlier for same spark timing

[steve99]

Originally Posted by thambu19

@steve99 Are you saying the Stock cal is more knock limited that the Stage1 cal running the same fuel? I find it difficult to believe because both cals have similar spark timing until close to WOT or 95% VE and Stage 1 cal has less Exhaust phasing by about 25deg at places although Stage 1 cal uses a tad more intake phasing at the same places overall it should make the engine knock a bit more than stock

If your talking about post above, then all the guys are doing is shifting timing from base a\b to the knock correction max A table, same overall timing. some tune is same just kca (knock coorection max a) table flattened so you could more easily see knock. Same tune no other changes.

[Wayno]

Originally Posted by steve99

If your talking about post above, then all the guys are doing is shifting timing from base a\b to the knock correction max A table, same overall timing. some tune is same just kca (knock coorection max a) table flattened so you could more easily see knock. Same tune no other changes.

Yeah I don't know why it's a discussion.

But then, I said 6 months ago pulling chunks of timing compared to smoothing it out is detuning the car, and it only took 6 months to catch on, so this whole KCA concept will blow over in 6 months time.

[dave66k]

I was hoping to view the video from this old thread, but it shows as private now. Any way to still see iti?