So you want to use a Cobb Accessport on your turbo Baja?

Technical Discussions - Got a mechanical problem?

Moderator: bajabob

Post Reply
User avatar
PizzaWrench
Scoobytruck Lurker
Posts: 10
Joined: Thu Dec 03, 2020 8:26 am

So you want to use a Cobb Accessport on your turbo Baja?

Post by PizzaWrench »

After completing a recent swap and seeing this question asked fairly often I just wanted to post some known things that work.

Turbo bajas have 2 basic options for tuning.

-Open source
-I am not covering this at the time.

-Cobb accessport with use of 04 forester XT or 04 STI ecu.
-MUST BE 04 due to immobilizers and such.
-Manual car needs manual ECU, Auto needs Auto ECU

If switching ECUS your car will run on the new ecu without a tune, but if you have changed any other component you need to be tuned correctly. The only exception to this is if you have swapped your turbo for a VF39 and are running a 2004 STI ecu. As for the forester XT ECU, you can plug a stock ecu into a stock baja chassis and you are good to go.

-Tuning
-have you modified your engine/turbo/fuel/intake/exhaust in any way? you need a tune.
-can you use an off the shelf cobb map? Only if still using the stock engine and your mods match exactly what are listed for the map on the cobb site.

What about cruise control?
-You CAN retain your working cruise control! All you need to do is replace your transmission neutral safety switch with Subaru part number 32008AA074. It is a direct replacement and will work as stock.

I hope this helps and sheds light onto anyone looking to go this route without digging through search results.
PLEASE HAVE YOUR CAR TUNED FOR THE CORRECT MODS
Lordhelmet_1
Scoobytruck Lurker
Posts: 2
Joined: Wed Nov 24, 2021 12:57 pm

Re: So you want to use a Cobb Accessport on your turbo Baja?

Post by Lordhelmet_1 »

PizzaWrench, I own a 2005 Subaru Baja Turbo with a 4EAT transmission. The car has a built engine to handle 600HP and several additional bolt on performance parts.

The car was tuned via Rom Raider and I am currently running a 16G XT 8CM turbo. The car made 290WHP and 347TQ.

I will be sending the transmission to ITP for an upgrade over the winter time and I plan on running a larger turbo. However, I would really like to run the Cobb Access port and their flex fuel kit to tune the car!

I just wanted to confirm that if I spend the money in purchasing a 2004 Forester XT Auto ECU that it will work with my car… Thank you!
Attachments
91317C4B-6630-4073-A301-3A3006FB691F.jpeg
91317C4B-6630-4073-A301-3A3006FB691F.jpeg (334.57 KiB) Viewed 98 times
53C1E8D7-3A49-4186-9C11-74A617479973.jpeg
53C1E8D7-3A49-4186-9C11-74A617479973.jpeg (4.06 MiB) Viewed 98 times
Diggndeep
Scoobytruck Lurker
Posts: 7
Joined: Sun Mar 15, 2020 6:02 pm

Re: So you want to use a Cobb Accessport on your turbo Baja?

Post by Diggndeep »

Call Cobb. I was just looking into this and they recommended an 05 ECU because there's more features. They were very friendly and helpful.
Lordhelmet_1
Scoobytruck Lurker
Posts: 2
Joined: Wed Nov 24, 2021 12:57 pm

Re: So you want to use a Cobb Accessport on your turbo Baja?

Post by Lordhelmet_1 »

Thank you for the information. I’m going to reach out to Cobb on Monday…
Post Reply