2006-2009 S2000 Kraftwerks supercharger RC 650cc injectors

K-Series Programmable ECU Calibration updates / downloads
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Spunkster
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2006-2009 S2000 Kraftwerks supercharger RC 650cc injectors

Post by Spunkster » Fri Dec 12, 2008 11:51 am

2006-2009 S2000 Kraftwerks supercharger RC 650cc injectors
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S2000 06-09 Kraftwerks.kal
2006-2009 S2000 Kraftwerks supercharger RC 650cc injectors
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Boofster
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Post by Boofster » Tue Feb 24, 2009 2:24 pm

I'm trying to match injectors for this kit.

Does this mean you recommend 650cc? Should I go with 750's or is that just overkill.

This is of course for the 06+ YouTune spec 10psi kit w/KPRO dual. I also have an upgraded exhaust system.
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Post by Spunkster » Tue Feb 24, 2009 3:28 pm

It means it was tuned with RC 650cc injectors

Using different injectors means you must completely retune the fuel maps

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Post by Boofster » Tue Feb 24, 2009 4:40 pm

Could you provide the injector duty cycle % using this setup?
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Post by Hondata1 » Tue Feb 24, 2009 5:26 pm

Boofster wrote:Could you provide the injector duty cycle % using this setup?
High - and bigger injectors will not necessarily help.

Here is what I have seen tuning the returnless DBW S2K with Kraftwerks and a stock fuel pump.

- You have around 50-54 PSI pressure in the tank, where the FPR is located.
- At the high 300 to low 400HP values you are losing about 10 psi along the fuel line from the rail to the tank.
- This means 40-44 PSI rail pressure
- At 10 PSI boost pressure this means pressure across the injector is 30-34 psi

A high flow fuel pump will do nothing in this case. Neither will larger injectors. You want a reliable 400+ you need a return line fuel system.

The Kraftwerks kits with the K-Pro dual adapter are making around 400 HP and are leaning out a little in the last 500-700 RPM. I suspected the stock fuel pump was also on its limits so on a test car here I installed a Kenny Bell Boost-A-Pump and upped the stock fuel pump voltage to 18V under boost. This gave me back about 1/2 a point AF at redline. The boost-a pump enabled me to run an in tank walbro 255 for my landspeed RSX making 650-750 HP all year.

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Post by Boofster » Mon Jun 15, 2009 1:33 pm

Just got the car started.

Ran smooth as stock at first but then settled into a bouncing idle. I know vacuum leaks cause this but I triple checked all possible issues.

Any suggestions? The only change I made to the map was to increase the injector size from 650 to 725 (does anything else have to be changed for that?)

Can I get to the tuner like this?
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Post by Spunkster » Mon Jun 15, 2009 2:22 pm

You may be running too rich or too lean. Just chaning the injector size is not enough. Different sized injectors have different flow characteristics and additional changes will almost always need to be made to the fuel tables to get them to run correctly and safely.
Last edited by Spunkster on Tue Jun 30, 2009 12:09 pm, edited 1 time in total.

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Post by Boofster » Tue Jun 30, 2009 11:44 am

I'm afraid to crawl to the shop (~10mi) with this bouncing idle.

Am I missing something easy here?

http://www.xtinct.com/ivan_kpro/Ivan_Bouncing_Idle.kdl
http://www.xtinct.com/ivan_kpro/Ivan_S2 ... twerks.kal
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Post by Spunkster » Tue Jun 30, 2009 12:11 pm

You appear to have a fairly large air leak somewhere that is not allowing the Map sensor to see the proper vacuum.

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Post by Boofster » Sat Jul 04, 2009 12:38 pm

Spunkster wrote:You appear to have a fairly large air leak somewhere that is not allowing the Map sensor to see the proper vacuum.
How do you see that? It says around -16 in the KDL.
I triple checked everything. There are like 3 vacuum hoses so that can't be it.

I pulled a OBDII code U0170 "Lost Communication With Throttle Actuator Control Module". Erasing it made it come back on immediately.

This code does not come up in the error box and reset errors in KManager does no clear it. Why does that happen?

Is that ECU related somehow? I haven't touched any throttle anything.
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Post by eternallx » Sun Jul 05, 2009 10:45 pm

Hondata1 wrote:I installed a Kenny Bell Boost-A-Pump and upped the stock fuel pump voltage to 18V under boost. This gave me back about 1/2 a point AF at redline.
Question I am going to install the boost a pump soon and was wondering if you guys hooked up the boost/vacuum line or just jumped the 2 wires so that the BAP is always on?

any insight on how to get the wires to the engine bay if you did hook it up please?

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Post by Spunkster » Mon Jul 06, 2009 11:01 am

Please check to make sure you have connected the harness correctly: http://www.hondata.com/downloads/KPro%2 ... 0S2000.pdf

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Post by Boofster » Mon Jul 06, 2009 5:12 pm

Spunkster wrote:Please check to make sure you have connected the harness correctly: http://www.hondata.com/downloads/KPro%2 ... 0S2000.pdf
This is exactly my problem. I did not know you are supposed to plug in the small DBW plug into the stock ECU instead of the harness (as it seems natural). You should definitely include this printout with the ECU.

Thank you!
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Post by Spunkster » Tue Jul 07, 2009 9:41 am

That paperwork is included with it.

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