We will be swapping injectors on Illusive's car soon so as well so all codes should be gone and life should be good.

Thx for the great support Oscar and for stepping up

 

So, basically, the Fit's ecu is supposed to adjust the fuel closed-loop properly even if the injectors are slightly smaller or larger. In this mode, the ecu uses the switching O2 sensor to aim for stoichiometric 14.7 AFR?

But, in open loop during WOT, the ecu drops into a pre-programmed mode and completely ignores the O2 sensor, and errs on the side of running rich to avoid excessive burn temperatures. AFR should be around 11.5 to 12.0?

 

that's what i am seeing.

 

Answers are:
Yes to the first paragraph... The ECUs short and long-term fuel trims will typically adjust +/-20% without a code. Closed-loop carries all of the important emissions controls.

Kinda to the second paragraph... Newer ECUs are now looking at the 02 sensor, even in open loop. Also, new vehicles Naturally Aspirated are running "forced induction-esque" rich for engine safety and catalytic converter conservation. Reason: Americans are not particularly nice to vehicles. We will get in fully-loaded cars in the middle of summer with the A/C on, drive across a 120F desert, then up a 8% grade, and expect them to live on 85 octane. So they are programmed rich so we don't detonate them.

Anyways, I wouldn't say the stock ECU "errors" on the rich side. It is pre-programmed to do specific functions according to specific inputs.
There are a lot of parameters your ECU looks at, especially nowadays.

With KWSC SuperCard, closed loop is not adjusted. Like the stock ECU, the SuperCard adjusts the injectors according to specific inputs; especially boost. The SuperCard will add fuel accordingly. The exact air/fuel ratio will depend on your vehicle modifications.

-OJR

 

Hello OJR

By any chance are you guys planning to develope a SC kit for the new 2009 fit? About when do you think it might be available?

 

Wondering the same.
I'm sure they will have to get a 2009 Fit to experiment with before they will be able to announce the release of a new product for it.

1st post. Same _BEN_ from Honda-Tech

 

We don't know about the 09 Fit... Especially since we haven't seen under the hood yet!

-OJR

 

I hope you guys can make it happen. I'm planning on picking up an '09 when they hit the market and your products look impressive.

With a higher base hp, revised head and a different vtec system some higher numbers my be attainable.

I dunno about that integrated header design though. Looks like it would be a pain to port/extract big power if one was willing to spend the money. Badass though if you wanted to go turbo.

 

the new civics incorporate this design, and it took a LONG time to get ANYONE to do a turbo for it.

i dunno about head swaps and different vtec systems on the new fit...it may not be worth it. but a plug in play rotrex kit would be cool.

 

Ok so I am tried reading through the thread, and I still have a question.

Leonine are you currently running your full exhaust setup with header or are you running without the header. I have practically the same setup as you except for my catback is the J's. Just wondering what A/F ratio you are getting with the stock injectors. Any help would be appreciated.

 

Yes i am running ful exhaust. mugen header, t1r test pipe, t1r midpipe, and mugen dual axleback. test pipe and midpipe are 50mm. I have been monitoring my A/F for the past week and a half and it seems like i might be running slightly lean. when i am in open loop from 3k it is about 11.5 and climbs up to the upper 12's by redline and into the low 13's. while my ecu has not thrown a code and the car has not blown up it doesn't seem to have the kich as it did before.

I am also having the same problem that rexxx had with the boost leak fromt the clamps that came with the kit. it seems the ones by the header are getting very hot and expanding now i see a noticable gap between the clamp and the rubber sleeve that connects the pipes. the car has lost its oomph. so i ordered the following and i am going to install today and tomorrow and hopefully that will fix the problem.

1) RC 195CC injectors (rc said stock maxed out at 182cc on their flow jet) so this is a slight upgrade which hopefully will correct the a/f and still not throw a CEL.

2) JEGS t-bolt clamps for the entire system. they are much sronger looking and have a locking lug nut mechanism. my experience with the stock clamps in other applications is they do loosen over time. if you over tighten them you will pop the mechanism and they are useless.

3) Iridium IX 1step colder plugs.

4) Mugen thermostat. the air temps are much hotter now which could also be causing a problem. i might run some ducting next to the fogs and up into the engine bay but that is later.

I will post my numbers and impressions afterwards. Won't know if my ECU is CEL free till wednesday.

I SURE HOPE KW comes out with the hondata for the A/T.

 

Thanks for the quick reply,

I guess I should probably hold off on putting my header back on, but in my opinion it does sound as if the car is running safely enough even at redline.

The only problem I forsee is if your car stops losing boost (if it is losing boost due to an expanding clamp?) , and the A/F gets any higher. Personally I think a low 13 A/F should be fine with 91 octane fuel, but I'm going to have to let the Jackson's chime back on that one.

Considering I don't have a test pipe, I figure I should be able to put the Mugen header on and still stay in the high 12's in terms of A/F.

Hoping the Jacksons or Yourself might be able to give me some insight on this.

Thanks,
Tom

 

yeah when i mentioned it to oscar he said it was ok and i take his word but i am trying to experiment here to see how much extra fuel i can give it without getting a CEL. I don't know if it is the clamps that are causing the lack of power but i KNOW everything is hooked up correctly. time will tell.

Edit: that is exactly what i am concerned about. putting on the clamps will cause the boost to rise and i have no idea how close to maxing out the stock injectors i am.

 

Oy, this SC is starting to get very expensive

 

Would someone post a 0-60 time on the KWSC fit? With any exhaust setup please.

Furthermore could someone post whether or not it's worth the $$$ ? Yes or no? Would you buy it again?

 

^^^^^same here.

 

As far as would i buy it again...not sure at this point. without the injector upgrade the car is slightly faster than my current setup. so to drop 3500 for the base kit alone i wouldn't personally but that's just me. i bought the kit with the expectation that i would be running the injector upgrade because that or the hondata is where the power is. i truly hope they come out with the hondata for the A/T otherwise i will have to drop dollars on the AEM FIC and get it tuned (if the 195's cause a CEL). not what i was expecting. I hope i will gain back the power with the 195cc's and the clamps.

so i finished installing the RC 195's, colder plugs, and password jdm thermal IM gasket. tomorrow morning i will install the new clamps and finish up.

Sorry Oscar not trying to bash the product because it is great! but i have to express my feelings.

And yes i know in case anyone wants to chime in i am running a manual kit in an A/T. that is irrelevant IMO seeing that everyone that has a manual and bought the injector upgrade has the same issues. They are lucky they can get the hondata soon and everything will be peachy.

 

You should have waited for the A/T. You shouldn't even be giving your opinion about the kit to tell you the truth. You couldnt wait so you went ahead and purchased the M/T and installed it on you A/T Fit and so I believe you are giving false information on this kit to everyone that is very interested. You are telling people how your car is reacting with M/T kit, when again, your car is A/T. KraftWerks went for a smaller supercharger for the A/T for a reason. Thats all I have to say about that. IMO you are bashing on the product and it seems very unfair to Kraftwerks. I have been very quiet for a long time on this thread but have been very on top of it and always keeping in contact with Oscar.

 

he's not bashing anything, man, he's stating his opinion and the problems he's had. and anyways, he IS having the same problems as all the guys with the MT Fits, so you can't scapegoat his transmission.

*edit* besides, seriously, he's obviously just trying to help, he's being very thorough and has been willing to go the extra mile to provide us with information we ask about or might want to know.

 

SickFit, Leo already explained his reason for why he's doing what he did and I feel your comments are somewhat extreme. I think its good that he is being so forthcoming about the issues he's having with his vehicle in this open forum. Its his opinion based on first hand experience and I respect that 100 percent, we're just spectators and/or future players in the forced induction game.