Can a JDM ECU be used with a UK STi 7/8 motor?
04 November 2003, 12:08 PM
#1
Scooby Regular
Thread Starter
Join Date: Apr 2003
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
I'm curious about if this will work and if it will just plug right in. I assume the engines are physically the same, but someone please correct me if I am wrong. Would a PPP ECU be a better option? Thank you.
04 November 2003, 02:50 PM
#2
Scooby Regular
Join Date: Aug 2003
Posts: 2,881
Likes: 0
Received 0 Likes
on
0 Posts
JDM ECU's are set-up to run on 100+ octane fuel. UK ECU's are optimised for EU spec fuel. I would have thought they are the same ECU but just run different maps.
PPP or ECUTEK on the UK ECU would be better option asuming you are in the UK that is.
PPP or ECUTEK on the UK ECU would be better option asuming you are in the UK that is.
17 November 2003, 10:29 PM
#4
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
There are cam and turbo differences too. Plus IIRC the UK motors run a lower rev limit with longer gearing, I can't remember if the JDM internals are different to allow the higher rev limits.
Better to get your UK ECU remapped.
Better to get your UK ECU remapped.
17 November 2003, 10:37 PM
#5
Scooby Regular
Thread Starter
Join Date: Apr 2003
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Thank you. There isn't that big of a difference between the VF30 and VF35, is there? Would anything be affected negatively by using the JDM ECU on the UK engine? My fuel cut kicks in a bit passed 8k and I have a Ver. IV tranny with the 4.44 ratio. I wish someone would tell me how to check if I have a PPP ECU. Any ideas?
17 November 2003, 10:40 PM
#6
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
I can't see it being optimum when all the bits are wrong. There are other better ways to get power out of it.
Your fuel and ignition maps are for the wrong fuel and the wrong hardware.
It is about as useful as trying to fit a P1 ECU to a UK MY99/00 turbo IMHO.
The VF30 has a larger turbine housing (P18 cf P15). A P18 duty cycle map would probably make the P15 overboost during spool up. To kill that without remapping you could kill response elsewhere.
Trust me, it is a no-hoper this one.
[Edited by john banks - 11/17/2003 10:43:35 PM]
Your fuel and ignition maps are for the wrong fuel and the wrong hardware.
It is about as useful as trying to fit a P1 ECU to a UK MY99/00 turbo IMHO.
The VF30 has a larger turbine housing (P18 cf P15). A P18 duty cycle map would probably make the P15 overboost during spool up. To kill that without remapping you could kill response elsewhere.
Trust me, it is a no-hoper this one.
[Edited by john banks - 11/17/2003 10:43:35 PM]
17 November 2003, 10:42 PM
#7
Scooby Regular
Join Date: Jan 2002
Posts: 500
Likes: 0
Received 0 Likes
on
0 Posts
The JDM ECU will not work unless you do some mods to the PCB in the ECU or to the cabling.
P.S. I wouldn't use the JDM ECU if you are looking for more HP for your UK car! Go for a remap of your ECU, I am sure you get much better results that way.
Mark.
P.S. I wouldn't use the JDM ECU if you are looking for more HP for your UK car! Go for a remap of your ECU, I am sure you get much better results that way.
Mark.
Trending Topics
17 November 2003, 10:45 PM
#8
Scooby Regular
Thread Starter
Join Date: Apr 2003
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Well, fuel isn't an issue, I'm in the US. But thanks. I was just thinking of either getting a JDM ECU or a PPP ECU, but I may already have a PPP ECU(doubt it), just not sure how to check. They just stopped selling 94 octane around here, which isn't good. What gas does the UK STi use? Thanks for the info.
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Car Parts For Sale
1
18 November 2015 07:49 AM