Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - Reply to Topic
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > Focus Tuning Chat > Adjusting tune for aftermarket Duratec IM

Focus Tuning Chat Discuss performance tuning options for your Ford Focus.

Search This Forum | Image Search | Advanced Search    

Thread: Adjusting tune for aftermarket Duratec IM Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What I Drive
Year, color, and model of your car. Example: 2003 Focus Centennial Edition Sedan
Your real name.
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
09-23-2012 09:43 AM
1turbofocus Set all your MBT tables to 60 vs 0

That is strange , I just looked at all the duratecs I have done and have set the IMRC switch to 0 with no issues

09-21-2012 09:45 PM
sutyak My Cossie knock-off IM is installed and 90% tuned after MUCH frustration due to one little flag.
Do NOT set the IMRC switch to "0". It will cause endless fueling problems!!

This is what I changed (or not) in my tune to compensate for installing a new intake manifold with no flaps. You may be able to get away with leaving the spark tables alone, but personally I like to know exactly where the total spark value is coming from without guessing whether or not the PCM is actually adjusting for IMRC.

1) leave the System Switches\Scalar\IMRC Switch at "1"
2) Add the IMRC\Spark Adder to Borderline for IMRCs values to the Spark\Borderline Knock\Borderline Knock Table
3) Zero-out the IMRC\Spark Adder to Borderline for IMRCs values
4) Add the IMRC\Spark Adder to MBT Table for IMRCs values to Spark\MBT Spark\MBT Spark Table
5) Zero-out the IMRC\Spark Adder to MBT Table for IMRCs values
6) leave IMRC\IMRC Opening RPM as-is. This seems to no longer have an effect, as the "imrc open" flag is always "1" now in the logs, even at idle.

There are some tables under "Transient Fuel" which I did not touch.
I will update this thread if I feel there is anything else to add.

In closing, I will say that I DO NOT KNOW exactly why the PCM 1) negates the load calculation at the IMRC Open RPM position and 2) pulls fuel like crazy by setting the IMRC Switch to "0". Until I hear an explanation I am going to assume it is a bug in the SCT software.
05-29-2012 11:30 AM
sutyak Excellent, thank you.
05-29-2012 11:29 AM
1turbofocus It should go smooth , just dont do anything crazy just adjust the basics , DO NOT try anything like changing the intake size , keep it simple , fuel , timing , idle and then turn off any CEL

05-29-2012 10:40 AM
Originally Posted by 1turbofocus View Post
If you paid for your tuning through me just because you now have the PRP doesnt mean I would keep helping you , Just shoot me an log and I will help

Thanks Tom. I will take a stab at it myself first and then bug you if I get hung up. I was just curious about any obvious issues you knew off the top of your head that I'll need to work around.
05-29-2012 09:56 AM
1turbofocus If you paid for your tuning through me just because you now have the PRP doesnt mean I would keep helping you , Just shoot me an log and I will help

05-29-2012 08:51 AM
sutyak Bump. Looking to do this fairly soon, but the turbo will be a GT2871 instead of the IHI I have now.
05-05-2012 04:18 PM
Adjusting tune for aftermarket Duratec IM

I'll be installing a cossie knock-off manifold sometime this spring/summer and would like to know some things to anticipate changing in PRP.
I know I'll be changing the IMRC flag to 0 since that will be gone. What idle-related values should I expect to tweak? I plan on keeping the IAC to prevent stalling and A/C use.
I suppose this question is directed at Tom as he is already familiar with my car, but could also be valuable to others if they come across the thread.

Car is 2.0 Duratec turbo. Stock motor plus a little 11psi turbo. 55# injectors.


Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 09:35 PM.

Copyright 2002-2015 All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.


Search Engine Optimization by vBSEO 3.6.1