DP ECU on S4r 2005 with full exhaus system.

[Mikkel67]

Hi.

I have a s4r 2005 with full Zard exhaust and plan for a DP open airbox/filter. In this case i believe that i need a DP ECU. I have been offered one from DesmoPorshe at the cost of 400 dollars.

does anyone have any experience with this set up? Is the installation easy? Is this a good price? Thanks for answers:)

[ducducgooseme]

I have a 2005 S4r with open air box, KN air filter and full Spark exhaust.  I used a PCIII mapped rather than a DP ECU.  I think for the money, its a much better way to go personally.  You can download your map and tweak as necessary.

Good luck and great choice of bikes!

[Mikkel67]

hi,

thank you for your answer.

I heard that the PCIII will not help under 5000? Is this true? Whay did you go for this option? How much did it cost? Where did you buy the PC, Open air box and K&N

[ducducgooseme]

The difference in tune below 5k is not enough to warrant the DP ECU in my opinion.  My bike runs great, and I live at 7k feet.

You can find the PCIII on ebay often for around $200 to $250 often.

I cut my airbox with a dremel to open it.  Very easy to do.  The KN filter I got from a local dealer.

[Mikkel67]

Hmm,

i now have to consider this again. Everybody gives different advices..

Is there different types of the PCIII? Something special i should look for?

How do you know how much to cut off the air box? I have found a used box together with a used K & N Air filter on eBay. considering it.

[jwoconnor]

I had my stock ECU flashed by DesmoPorsche.

http://ducatimonsterforum.org/index.php?topic=34252.0

[ducducgooseme]

Yes, you will need the PCIII made for that bike.

As far as the airbox goes, I cut the entire top off of mine, just above the hinges.  Very easy to do

[brad black]

the 2005 model runs an open loop efi system, so there's no need to replace the ecu if you want to use a pc3.  the later models are closed loop efi and as such have an adaption system that automatically adjusts the tuning at lower throttle and rpm.  to remove the closed loop system most people fit the dp ecu, which is "for offroad use only" and open loop.

there will be differences in the std and dp ecu, but not major.  some have said that a full system on an s4r gives a wacky surge around 5,000 rpm or so that can't be tuned out, even with a pc3.  possibly the different resolution of the fuel map - ecu 20 x 32, pc3 9 x (every 2350 rpm) means there's ecu throttle opening lines that fall between the pc3 throttle lines and there may be a point or small area where say the offset map is wacky and that gives the issue.  the dp ecu are made for having the cat in place.  maybe a dp cams and 50mm system kit ecu would be better, although it was pretty crappy down low in my experience.

[2CardDuc]

I too have a '05 S4r with open air box, K&N air filter, PCIII and Spark full exhaust.  Once installed, I had the bike dyno'd w/custom map and it has run perfectly ever since.  Also try a 14/43 sprocket combo for even cleaner performance.  14/14t also works well.  Good luck! 

[Mikkel67]

thanks for the answers.

I think it is very hard to decide what to go for. And I don't understand all of this technical stuff.. DP ECU or PCIII... What made your choice? How is the performance difference from stock setup?
BTW, what is the original sprocket setup?

[jwoconnor]

My main reason for choosing The DP ECU was to remove the immobilizer and the O2 sensor. I bought the bike without the red key (for quite a discount) and the O2 sensor is a pain. Getting the DP Termi map was just icing and I was hoping it would be enough to allow the intake/exhaust mods I have. Later I may add a PC3 but for now I'm happy for $250.00

If I had the red key and an '05 or earlier bike (no O2) I'd just get the PC3.

[2CardDuc]

thanks for the answers.

I think it is very hard to decide what to go for. And I don't understand all of this technical stuff.. DP ECU or PCIII... What made your choice? How is the performance difference from stock setup?
BTW, what is the original sprocket setup?

IMO a good tuner will get the most out of your motor w/PCIII and a better choice for our system...DP ECUs are a better choice for closed loop ones such as '07 & newer.

15/42.   

[ducducgooseme]

IMO a good tuner will get the most out of your motor w/PCIII and a better choice for our system...DP ECUs are a better choice for closed loop ones such as '07 & newer.

15/42.   

+1!  Dont waste your money on the DP ECU for that bike.  If it was a 2007+, that is different.

I went up 2 in the back and down one on the front for gearing.

[Mikkel67]

hi,

thanks for the answers.

Why do you say waste? Isn`t the PCIII almost as expensive? And the performance better with the DP ECU insted of the PCIII

[Howie]

hi,

thanks for the answers.

Why do you say waste? Isn`t the PCIII almost as expensive? And the performance better with the DP ECU insted of the PCIII

The DP ecu is a fixed map except for CO trim, which is less important as RPM climbs.  The PC III will allow you to either load a canned map for different modifications or a custom map developed on a dynomometer for your bike.