-
Posts
564 -
Joined
Content Type
Profiles
Forums
Gallery
Posts posted by TDC Tuning
-
-
:icon_confnoone ever sees me
then a gain my car hasnt see the light of day in 5days
poor thing i hope to let her out to excrecise today
-
10/20/2006. I did a double-take on the bus when I saw "my" car parked on Center Street. GRP GT wagon.
the short bus?
:lol:
-
spotted bulldogg2
parked all half cocked corner of beech and some other st north I think in manchvegas
bike rack and vet plates
-
OMG i spotted
Randy, scans, gibjer, superchicken44, red beast and like 770 other subarus today !!
-
do you own a Forester?
I am not a Masshole, but I live here. Only place for a Lesbian to get legally married!!!!!! -
Scansirolihole is breakin in his new TDC clutch and fly :-)
im SURE hell post tomorrow
-
my wicked good buddy sully says"fackin gaddam massholes"
-
What time, coulda been me,
I also spotted Jon (TDC Tuning) on my way back from NHIS, you were going North on 93
EYE SAW JOO
-
ha! i would just love to average 20 mpg! i drive all the time, mostly city. stop and go, stop and go.... if i get an avg of 20 mpg, i'm pretty darn happy! actually, if i get an avg of 18 mpg, i'm ecstatic!
Ditto
-
Any word on Cobb releasing "updated" maps for our cars? 1.15 has been out for a little while...
Thanks
there isnt much to update
the staged maps serve a function
and with more pro tuners available
(some with REALLY NICE pro tune maps *shameless plug*)
there isnt much of a need for updates to the current maps
-
:iam:SPOTTEED!!!@@!@!@!
WANNA BE TDC LGT (superhawk)
TRYING TO STEAL A DOWNPIPE FROM MY TRUNK!
-
*cough* scans has em too * cough*
u are welcome to come for a ride im ine too
-
hell no beautiful ride
so much so that people have sold coilovers after being in my car
to go back to these, and stock shocks. Everyone i know with them loves em
-
Stech for now
-
Jon
That was me at the Mattress store I saw you too!
Yours sounded cool , what are you running for mufflers?
Stock mid custom 2.5" Y pipes and magnaflows
GTspec headers and invidia catless DP
-
Today, 93N blk Legacy 2.5i goin north as i was goin south just before 89,
Today, Elm st manchester Silver LGT wagon @ matress place
Today, Loudon road concord Some light color Legacy
cant miss me, yet i never get spotted!!
http://www.tdctuning.com/projects/tdctuning2005legacygttdcprojectcar/PC070014.JPG
-
get me 3-5 guys and i will !
Hey Jon...Why don't you come down to NYC and tune my car and I'll make sure I spot you...lol -
noone ever sees me (on the road)
-
I got my AP like 4 days ago and I am running stage 2 93 oct. which should yield around 16psi, correct? Well I'm only getting 11.5 or 11.8psi which is upsetting me. LOL. I need more power, but don't we all. I talked to Cobb and the rep. said that it may take up to two weeks to reach desired boost levels. Is this true? Is it like this with every AP on the 05 LGT's ? I know that I'm new with the whole AP thing since my last car was a 92 SVX LS-L but I would expect something more like the instant difference from the ECU chip that I installed on my SVX. But I'd appreciate any feedback on that subject.
Check out my E tune thread in 2.5L powertrain forum
and PM me
-
I would like to know how many AP users have gotten rid of the dreded stutter probem with the AP. I plan on getting an AP in the next week or so.
for a $150 custom map i have it elimiated (and more power than stage 1 and 2 )
or WITH an ap for $700 shipped!!
-
99% of intakes WILL LEAN THE CAR OUTYes i did read up on the FAQ on Cobb about this. I guess I'm simply going off All the Turbo cars I have had. I thought the Passat was the worst with getting foul; ups when tweaking things. I would have never thought in a million years that a simple intake would trip this car up. I would think the car would have enough auto adjust in the timing and in the ecu to adapt toa a m inor change as this. If what your saying is true then a dirty filter could have the same effect.Other thing to think about is K&N as done plenty of R&D work when producing this air filter. If there was a problem to the caliber your taking about they would not make a filter system for the car period. They would have major tech calls about this already and would have put this part on hold.
I will contact them now that I'm online again and get one from them and test it myself.
I'll let everybody know what I come up with
Scott
and most will affect the timing a bit
Some of you guys are QUITE mislead about ahow the ECU "adjusts"
ill go into a bit about it:
- Short Term Fuel Trim Description
The short term fuel trim is a ECU erasable memory register. The neutral value for the short term fuel trim is 0%. Any deviation from 0% indicates the short term fuel trim is changing the injector pulse width. The amount of pulse width change depends on how far the short term fuel trim value is from 0%. The short term fuel trim is rich when the scan tool indicates (up to )-25%. The short term fuel trim is lean when the scan tool indicates 25%. The short term fuel trim changes the pulse width by varying the Closed Loop factor of the base pulse width equation. As the ECU monitors the oxygen sensors input, it is constantly varying the short term fuel trim value. The value is updated very quickly, therefore, the short term fuel trim only corrects for short term mixture trends. THe correction of long term mixture trends is the function of long term fuel trim. - Long Term Fuel Trim Description
The long term fuel trim is a matrix of cells arranged by RPM and MAP. Each cell of the long term fuel trim is a register like the short term fuel trim. As the engine operating conditions change, the ECU will switch from cell to cell to determine what long term fuel trim factor to use in the base pulse width equation.
While in any given cell, the ECU also monitors the short term fuel trim. If the short term fuel trim is far enough from 0%, the ECU will change the long term fuel trim value. Once the LTFT value is changed, it should force the STFT back toward 0%. If the mixture is still not correct (as judged by the HO2S), the STFT will continue to have a large deviation from the ideal 0%. In this case, the LTFT will continue to change until the STFT becomes balanced. Both the STFT and LTFT have limits which vary by calibration. If the mixture is off enough so that LTFT reaches the limit of its control and still cannot correct the condition, the STFT would also go to its limit of control in the same direction. If the mixture is still not corrected by both STFT and LTFT at their extreme values, a Fuel Trim Diagnostic Trouble Code (DTC) will likely result.
That being said, lets adapt to an intake and a subaru
so you put on an intake
and your STFT goes to lets say +7% (adding 7% to achieve 14.7:1)
after driving arounf the LTFT will ty to correct that and the TLFT will be +7%
so while cruising in Closed loop the 02 corrects for the intake.
THEN YOU FLOOR IT
LT AND ST trims go to 0% (thats what they do) and the car runs off the maps
Here lies the problem that 7% that was needed is now gone
and your afr will be Off due to the fact the intake causes a lean condition.
All of a sudden you are 7% off and AFR is important!
The other problem is
the loads can be affected by an intake. If the internal diameter and flow is not like stock.
Lets say the stock LGT intake is 72MM and your new intake is 75MM
Its just 3mm right? WELLLLLL
that will change the load a bit (not as much as say a big maf) but a bit
so now the timing is slightly advanced and the mixture is leaner.....
w00t you make more power (thats what happens when u do that )
BUt you lose that saftey
The subaru ECU is WAY smarter than you are, so it combats knock and impending knock by retarding the knock advance (knoch correction, Dynamic advance)
but that reduces power......
i could go on but i wont....
There is so much involved just slapping on parts whilly nilly can and WILL affect things, and the ecu may adjust , just not the way you thinkit will.
I have tuned intakes, lots, APS, Cobb, K&N , AEM, Custom, Blow thru MAF
and many more.
I can say that a cobb intake = GREAT GET ONE if you want an intake
I can say that a K&N intake = MEH , on an sti i did it made his life horrible, on an LGT it was ok, on another lgt it was a PITA.
Perrin = Confused me, i ordered one For an LGT (72MM inlet) they sent me a 68 MM wrx in a LGT box, I called explained and they claimed it was fine.........
no thanks. I put it on an Sti and got a differnt one for the LGT
APS= whacky , needs a tune
AEM = needs a tune
Perrin big maf = the bain of my existance, ask Christian or Scans about that
im rambling now
PM or IM if u have questions
- Short Term Fuel Trim Description
Official North East Spotted Thread
in New England
Posted
07 spec-b in concord today (dont ask how i knew it was a spec B)
out near long pond zipping around and
then tailgating a saab i think
i was in a pathfinder coming from hospital area ( back way)
oh and BTW having your plate say what your car is is quite redundant
LOL (sarcasm... kinda )
BUt having your plate say how much WHP you have IS COOL !!!!
(lol idk who might have that )