Meh, mine have been fine - pretty much excellent - never would have bought the STi if the prev WRX was not so good. . . . all cars have problems.
I hope you’ve contacted KillerB to get their thoughts on what you’re seeing. Did you see high oil consumption prior to installation?I have a 19 STI and mine burns through a quite a bit. About a quart every 1500 - 2000 miles. All I have is an AOS and a catback. Change oil every 3k, mostly use Motul 5w-40. I baby the sh*t out of it too. Makes me worry a bit as I should probably get a compression test soon. Currently at about 26k.
Here is my current mods. Already have Flex Sensor installed just no tune yet and thinking if should i do the IAG/cobb fuel rails and lines with it before i retune for e85.Yes, you can. I have 1050 injectors, Cobb flex fuel kit, Cobb fuel pressure regulator kit, AEM Pump. Intake, DP, KB Headers and that’s it. Technically you could do it without the flex fuel kit if you were going to run only E85, but I wouldn’t suggest it. E85 varies in some places so it would be better to have the ethanol sensor. Also, at some point, you’ll find yourself in a situation where there is no E85. That said, I love only pumped E85 for the last year.
|Cobb Intake With Box|
|Cobb 1050x Injectors|
|Cobb Aem 340 F.Pump|
|Cobb Fuel Pressure Regulator|
|Cobb Fuel Pressure Sensor|
|Grimmspeed Catted Downpipe|
|Grimmspeed V2 Heatshield|
|Cobb Air Oil Seperator|
|4th cylinder cooling mod|
|ETS Quiet Exhaust|
|Iwire Xseries Stealth Wideband|
You are good to go for E85. Adding rails will certainly help efficiency in the fuel system, but not required. This is one of those things that people are split on. There won’t be any major gains from this, but if your willing to dig back into the top end and you think you might go slightly bigger turbo, its a good idea. Also might as well do an upgraded inlet tube while your at it.Here is my current mods. Already have Flex Sensor installed just no tune yet and thinking if should i do the IAG/cobb fuel rails and lines with it before i retune for e85.
Cobb Intake With Box Cobb 1050x Injectors Cobb Aem 340 F.Pump Cobb Fuel Pressure Regulator Cobb Fuel Pressure Sensor Cobb EBCS Grimmspeed Catted Downpipe Grimmspeed V2 Heatshield Cobb Air Oil Seperator 4th cylinder cooling mod ETS Quiet Exhaust Iwire Xseries Stealth Wideband
Wow very well said! ive been taking to alot of people lately and i can agree that it is 50/50. seems like the OGs pretty much say i dont need it at all with stock turbo. Its something that its “good to have” but not to have until i upgrade the turbo. My tuner is saying if i can do it or afford it, why not.You are good to go for E85. Adding rails will certainly help efficiency in the fuel system, but not required. This is one of those things that people are split on. There won’t be any major gains from this, but if your willing to dig back into the top end and you think you might go slightly bigger turbo, its a good idea. Also might as well do an upgraded inlet tube while your at it.
I talked with 6 different tune when I went to E85 and they were split 50:50 over needing rails. A good tuner can smooth out then fuel map with out them, but it you want to make sure the stumble will not be there, do rails and lines. My tuner was able to get me stumble free, without, and says the aftermarket rails aren’t really necessary at my level of mods.
Cobb DownpipeWhat are your mods with stock rails and lines on e85? and how long have you been on it? thanks for your response.
wow thats an amazing list! how long have u been on e85 with all those mods? and what year is your car?Cobb Downpipe
IAG AOS - Street
Cobb Boost Control Solenoid
Cobb 1050 Injectors
AEM Fuel Pump
Cobb Fuel Pressure Reg Kit
Cobb Flex Fuel Kit
Cobb Fuel Pressure Sensor Kit
Cobb Intake + Air Box
Killer B Holy Headers
Killer B Baffle
Killer B Oil Pickup
All the engine related mods.
The only additional mods I’d like to do are:
My tuner advised against the 20G unless I upgrade internals or plan for them as the life of my pistons would be short lived. Still not even sure I would upgrade rails for the above work.
Technically, an AOS does not prevent burning oil. But, we are probably all talking about oil consumption, in general here. AOS is meant to catch and potentially recirculate blow by oil back into the crank case before it goes into your intake tract and dilute fuel/octane. Typical oil burn is from worn piston/rings/valve guides, etc... A young motor that has not been abused will not typically not burn oil. But our turbo cars can cause oil loss from excessive crank case pressure when high pressures in combustion chamber "blow by" pistons back into the crank case and force some oil to leak into the PVC system and move to the intake system.Just got back home from a road-trip current mileage 16,500 & still does not burn a drop of oil. My last oil change was last month. I used Castrol Edge 5W-30 Advanced Full Synthetic oil. Should I still get an IAG AOS installed based on the mileage?