RomRaider

Does your wire tweaking involve a resistor in the TCM where the line pressure linear solenoid is? I have a 04XT 4EAT..share your wealth of knowledge with me!! haha..

its cobbs pro tuning software..... the really expensive stuff. i think we were looking at the legacy GT bin's

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i appreciate the link to the shift kit, and the other available trans mods, but im still hoping that this setting gets implemented into ROMRAIDER...... and yes i know i started this post 4 years ago.

we had a customer car, that had a piggyback for an STI, installed into an automatic forester. the piggyback didnt allow the trans shift timing retard and the shifts were notably better. its often by accident that we have some of the best ideas.......seriously if we just had an adjustment for the amount of timing being pulled during the shift function these cars would run so much better. im not sure i would 0 it out but cutting the value in half would be great!

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FWIW, there is a valve body mod made by climberD on legacygt.com for 05-06 LGT/OBXT 5eat. Disregard timing retard during shifts, this vb mod has been handling e85 hta68 setups with trackuse without problems. It's a tried and true mod, go look in the tranny forum there, you won't be disappointed. Also, a GT40R LGT 5eat is running this mod with an ipt built tranny at around 500whp+, put it in D and romp on it. Shifts firm and crisp without slip.

I kinda think that the VB mod makes this table even more interesting... Now that y'all have transmissions that can cope with hard shifts, why not tune out the timing retard that was designed to reduce power during shifts?

Seabass and I were talking about these tables last weekend... we don't know where they are but I'm pretty sure he can find them.

The first step is to find the code that calculates total timing. You can find that by finding the SSM function that looks up the standard timing parameter, then find the timing value that it returns, then find the xrefs to that value's memory location. One of them is basically just a series of addition operations, combining a few different values to get the total timing value. Basically it's base timing + advance + a few compensations. Create a logger profile that will let you monitor each of those compensations. I did that in my car, which has a manual transmission, and I found...

One of the compensations is FLKC + FBKC.

One of the compensations controls idle timing - it's +/- 5 degrees or so when idling, but it's at zero otherwise.

One of the compensations is almost always zero, but sometimes blips to a nonzero value during quick throttle movements.

Three of the compensations were always zero in my car. I'm pretty sure that in an AT car, one of those compensations will cut 10-20 degrees of timing when the AT shifts. When you know which compensation is doing that, you can work backward from there to find the tables that govern that compensation.

Why not just proceed with AT torque request signals generated by TCU under shifts ? All of them are inside SSM lookup table.

Trying to decrease timing retard you should take into account that turbine efficiency under shift is also ignition dependent. You may get MAP spikes\fallouts after shifts with improper timing settings.

Potential solution: use an MT map. I have been for many many miles without issues.

Starting from the SSM table sounds easier, I just didn't realize there was a regular SSM parameter for it... I never noticed it in my ROM, but maybe that's because I have an MT ROM. Or because I just wasn't paying attention.

i have driven cars with the full retard, and with the full advance..... i was really hoping to have access to the table in romraider, so that the amount of timing retard at shifts can be adjusted. let me know if you guys need a tester for this, i will be more than happy to help with development by testing the tables, or make donations to help with the programming..... i dont program but im happy to help anyway i can.

in the off chance that this doesnt happen, or there isnt enough interest to warrant the development.... is anyone up for helping me with switching to a manual trans ECU file? i was under the impression that i could not flash a manual trans file to my ECU..... am i wrong? i can easily copy my tables into a manual file if someone can advise me on which manual file to start from..... need some "coaching" hahaha

im using A2WC410D; 05 Subaru Forester XT, AT



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Like this?
viewtopic.php?t=8103

ok so the idea is that we can run a non automatic file with no real harm other than having to do a few pin swaps to get a clutch switch ect.....

dumb question, but is there any reason i couldnt get a pin out diagram for an 05 STI and the pin out diagram for an 05 forester and make the STI ECU and rom work in my forester???

if im going to go thru the trouble of changing the wiring to run a non auto file, id rather run the STI file, because it has the option of speed density and iv got a few drivability quirks with this huge MAF that i cant tune around. the forester ECU isnt supported.

thanks again for the advise.

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I think it has been done before. I don't recall when/where so search around and you may find the thread about it.

the AT and MT map switch for my LGT required NO mechanical changes. The ecu can still be an AT ecu with an MT map flashed on it, atleast with the LGT.

ok it took a few tries because the first file i modded wasnt supported by ECUflash, but i am now running a manual ECU file in my automatic forester XT. the shifts are much better. theres a little wierdness with the idle at slow speeds, and the fuel cut entry and exit, but i atribute some of that to the 4" MAF. theres definately some weirdness with the idle when coming to a stop. initially it was idling way too low and occasionally stalling but it seems to have learned its way out of that. the automatic file had some code to make it idle up around 1200 rpm when coasting and not in fuel cut mode, which the manual file does not have..... but it seems to be fine without it. im gonna drive it around for a week or 2 like this and play with it. see how it does.

im pretty much done with my engine build, gonna try to get it installed this weekend. (link in my signature) then ill see how the manual file does with a built engine. down the road i still want to try to switch to the STI ECU and file (so i can go speed density).... but im sure that will be a little more involved..... changing wiring and what not.

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updates? I'm willing to give this a shot with the Accessport by running a manual transmission file. Only difference this will do is that the ECU will not know when the TCU sends its signal to cut the fuel injectors before it shifts right?