COBB ATR Discussion thread

[Ninkumpoop]

My engine mods:
- HKS SRI
- COBB inlet pipe
- reworked K04 turbo
- TurboXS downpipe
- custom catless testpipe (just a 3" pipe)
- HKS CBE

I have an AP but not quite satisfied with the power gains. Can anybody who has a map designated for something somewhat close to what I have please share their custom map? I'm willing to pay for the map but I can't afford what tuning shops charge. Anyone willing to help me out?

 

[Dano2010]

Pretty minimal.
MSCAI, Inlet tube, prototype Forge BPV, my own version of the Rotus8 shifter mod, motor mount, shifter bushings, boost gauge.
I want to push the boost up a little, but I want to do it right, and that means monitoring the results and tweaking things like timing and AFRs as necessary.
I also am of the belief that the original tune on these cars has to be very generic to run in a huge variety of environments and work for a number of different driving styles (with this car all would include the word aggressive, but the options are always, occasionally, and once in a while).
I want to tune for my particular intake/MAF, and push up the boost only in the upper RPMs. In addition, I would like to get rid of the overdone low gear steering angle induced boost limit. I might even reduce the overall boost at low rpms to reduce my tendency to spin the tires at stop lights. I just don`t want the nanny doing it for me.
Essentially, I want to make the car as stable as I can and redefine the power curve to suit my style better. It sounds like the AP can accomplish that.

I have done exactly what you are referring to in regards to lowering my Throttle-Requested load in XX gear tables so as to limit wheel spin in 1-2nd gears. Works like a champ, exactly what a multi-stage MBC would do, and I also extended my boost taper in 3-5 gears, to the turbos limit of course.

You can tune power in two ways with this car and Cobb as well as I have decided to tune for "load" not boost. That way you tell the ECU you want 1.90 load at 5000 RPM and it does everything it can [boost, WGDC, timing, etc] to reach that load goal. This is probably why boost is so inconsistent with these cars but I still like this tuning approach. Not even sure you can just tell the car I want XX boost to XX RPM. My buddy has a subie and they can tell their cars exactly what they want and boost in his logs has such a smooth taper and no spikes it is beauty. Maybe when I learn more I can get closer to that.

As far as I can tell, this ECU doesnt seem to even look at the Boost target tables and it only looks at the lowest values in the Throttle tables. It does read the Boost-fuel cut and Boost- Throttle Close tables however and I would suggest you use these per Cobbs instructions to add safety measures to your tune. Throttle close first then fuel cut.

Sooo back to targeting load per gear..you have to raise the Throttle-Requested Load Baro vs. RPM and Throttle- Requested Load A and C table values [don't know what the phuck the B table is for as the load values are WAAAY low, maybe for high BAT] to get the ECU to actually use the Throttle-Requested Load XX gear tables. I just used Cobbs Stage II MSCAI2 91 v105 map and modified my MAF curve and the above mentioned tables.

Then started running out of fuel so guess what's on order, PTP internals.

 

[Dano2010]

Anyone take the time to compair some of the Cobb maps to see what they are doing. Example: The Throttle- Req Load XX gear tables are actually lower on a TMIC map vs. without. Are they doing that because the TMIC gives you about 2PSI more boost per load value vs without one?? I know that is over simplifying things but can anyone with ATR/tuning experience confirm??

Thanks!

 

[Dano2010]

is this thread dead! Should I hop over to the Cobb site?(sleep)

 

[79535]

I don't play with the ATR, but I can tell you people with upgraded intercoolers usually suffer from overboosting as you mentioned above. That would be a simple explanation as to why they would have lower load targets.

As for going to the Cobb forum, go ahead.

 

[Dano2010]

I don't play with the ATR, but I can tell you people with upgraded intercoolers usually suffer from overboosting as you mentioned above. That would be a simple explanation as to why they would have lower load targets.

As for going to the Cobb forum, go ahead.

Yes, you are right about that. The lower pressure drop and better flow of the upgraded ICs makes our turbo spool faster and produce more boost. I hit 25 PSI the other day in 4th and scared the s*** out of me! Immediately let off the gas.

Thanks for the reply.

 

[mazdaspeed32007]

i have a fmic and my boost hits target and holds without any spike or loss. v105 stage 2 fmic 93 octane

 

[79535]

i have a fmic and my boost hits target and holds without any spike or loss. v105 stage 2 fmic 93 octane

We were making reference to a person not running a map. An untuned car with TMIC consistently overshoots their boost targets.

The Cobb map is tuned to work with the FMIC. It should be holding your boost target.

 

[mazdaspeed32007]

well in that case...i agree.

 

[opt_ms3]

of course I'm just trying to help a dude out, and my post gets deleted. this forum is awesome.

 

[8.5MS3]

haha truth hurts

 

[GoFast]

of course I'm just trying to help a dude out, and my post gets deleted. this forum is awesome.

As you have been told before, if you want "help" by promoting another forum do it via PM.

 

[Dano2010]

We were making reference to a person not running a map. An untuned car with TMIC consistently overshoots their boost targets.

The Cobb map is tuned to work with the FMIC. It should be holding your boost target.

Not correct, I am running Stage 2 MSCAI2 93 TMIC v105.

Just FYI

 

[Dano2010]

P.S. I am spiking around 22.3 for less than .5 of a second then settling down to 20 then the taper starts down to 17 or so. Is that what you guys are seeing or is your max 20ish?

My boost guage [Prosport] was bouncing up to 25 which wasn't correct and was alarming me but when I was logging with the AP it shows around 22.3.

Thanks for the replies and if you have more thoughts please let me know. I guess I could just lower my load values and get rid of the 22 PSI spikes??

 

[Dano2010]

Here are my latest logs and disregard the DI pressure I have that resolved with a new PTP kit installed today and haven't made it thru the break in peroid to log more. Any thoughts would be greatly appreciated!!

 

[Dano2010]

Well that didn't work. Here is the log.

 

[Dano2010]

My engine mods:
- HKS SRI
- COBB inlet pipe
- reworked K04 turbo
- TurboXS downpipe
- custom catless testpipe (just a 3" pipe)
- HKS CBE

I have an AP but not quite satisfied with the power gains. Can anybody who has a map designated for something somewhat close to what I have please share their custom map? I'm willing to pay for the map but I can't afford what tuning shops charge. Anyone willing to help me out?

I am no expert by any means but I think the Stage 2 Cobb SRI map would work for the most part. If the Turbo XS a catted DP. If you are running catless you are going to have over boost issues that an OTS map can't resolve. With ATR you might be able to tune the overboosting out but that would be a question for someone more expreienced than I. You might find someone out there that can do an e-tune for you at less $$$ than a protune.

 

[SallySpeed3]

Somewhat off topic, but it does involve ATR. How long does Cobb usually take to e-mail you back about downloading ATR? Said on their website 24 hours, it's been like 4 days.

 

[8.5MS3]

Somewhat off topic, but it does involve ATR. How long does Cobb usually take to e-mail you back about downloading ATR? Said on their website 24 hours, it's been like 4 days.

theyre closed till after new years. check the website

 

[SallySpeed3]

Ah....well.....that would explain it, lol.