ej25subie05
New member
hey all, having an issue with my 2005 STi that me and a good friend of mine have been tuning for a bit now. We are using the cobb v2 access port with cobbs tuning software (access tuner race). We are stumped by the issue we are having and hoping to get some insight form someone that knows cobbs tuning software pretty well. He's used to the older version of Cobbs tuning software so access tuner race is new to him in a few ways.
Before i go on we are trying to tune for Speed density. just to make that clear
the reason i am trying to do this with my friend is because i have built the car myself (except engine) and there is no reason for me not to learn how to tune my own car as well. i want to learn everything i can.
Issue we are having.
Car runs great, but as soon as we do a WOT pull (3rd gear for instance) it holds a solid 11* afr till about 5400 rpm in most cases then starts going lean. it starts going lean around 4,500rpm in some gears and 2nd won't do it till around 5800rpm
Do a part throttle pull in 1st-4th gear (didn't do 5th-6th for excessive speed lol) and you can go to redline with a beautiful 11.3 afr.
I am new to tuning, this is my first car i have ever tried to do it with a friend to learn as much as i can. but does any one with knowledge of the access tuner race software have any ideas. maybe I'm missing something. Or maybe its a mechanical issue???
here is a list of mods to show the extensive work done on the car, its no ordinary engine.
K1 billet crankshaft
K1 rods
Cosworth forged pistons
Arp rod bolts, arp head studs
Headgames port and polished heads
GSC S2 cams
ferrea valvetrain
ATI fluid dampner pulley
cosworth oil baffle
killer b oil pickup
TGV deletes (stock welded)
3mm tgv spacers
id1000cc injectors
custom stainless steel fuel lines with aeromotive fuel rails and aeromotive for
custom 3" intake
SPEED DENSITY
Cobb map adapter with AEM 3.5 bar MAP sensor
Perrin fmic
perrin blow through pipe for SPEED DENSITY
Grimmspeed ebcs
pas hard turbo inlet
blouch 3.0xtr 10cm exhaust with 2.4" inlet
perrin catted downpipe
agency power unequal length headers
grimmspeed ewg uppipe
tial bov
tial ewg 38mm with external dump
emissions system delete
if you need to know any other mods specifically please lmk i may have missed something.
appreciate any help. really want to start getting somewhere with the tune. as far as city driving car is perfect. starts like stock, idles like stock (higher rpm) same drivability etc. afrs cruising stay at 14.7-14.8 far
Before i go on we are trying to tune for Speed density. just to make that clear
the reason i am trying to do this with my friend is because i have built the car myself (except engine) and there is no reason for me not to learn how to tune my own car as well. i want to learn everything i can.
Issue we are having.
Car runs great, but as soon as we do a WOT pull (3rd gear for instance) it holds a solid 11* afr till about 5400 rpm in most cases then starts going lean. it starts going lean around 4,500rpm in some gears and 2nd won't do it till around 5800rpm
Do a part throttle pull in 1st-4th gear (didn't do 5th-6th for excessive speed lol) and you can go to redline with a beautiful 11.3 afr.
I am new to tuning, this is my first car i have ever tried to do it with a friend to learn as much as i can. but does any one with knowledge of the access tuner race software have any ideas. maybe I'm missing something. Or maybe its a mechanical issue???
here is a list of mods to show the extensive work done on the car, its no ordinary engine.
K1 billet crankshaft
K1 rods
Cosworth forged pistons
Arp rod bolts, arp head studs
Headgames port and polished heads
GSC S2 cams
ferrea valvetrain
ATI fluid dampner pulley
cosworth oil baffle
killer b oil pickup
TGV deletes (stock welded)
3mm tgv spacers
id1000cc injectors
custom stainless steel fuel lines with aeromotive fuel rails and aeromotive for
custom 3" intake
SPEED DENSITY
Cobb map adapter with AEM 3.5 bar MAP sensor
Perrin fmic
perrin blow through pipe for SPEED DENSITY
Grimmspeed ebcs
pas hard turbo inlet
blouch 3.0xtr 10cm exhaust with 2.4" inlet
perrin catted downpipe
agency power unequal length headers
grimmspeed ewg uppipe
tial bov
tial ewg 38mm with external dump
emissions system delete
if you need to know any other mods specifically please lmk i may have missed something.
appreciate any help. really want to start getting somewhere with the tune. as far as city driving car is perfect. starts like stock, idles like stock (higher rpm) same drivability etc. afrs cruising stay at 14.7-14.8 far