Honda Fit boost.fi6

This is the one I've street tuned using a lot of gas and a wideband....enjoy!

Specs:
stock internals
RDX 410cc injectors
HKS kit with BOV
custom cold air intake in fender well
stock boost
2.5 exhaust
sea level

idles at 15.x
light throttle mid 13's
wide open at 11.2ish....

 

i sent you a tune of mine. no idea how to host files, only pictures, so if you want to host it and send me the link, ill add it to this post.

kit/tune specs:
top fuel japan manifold
garrett journal bearing gt turbo (i wish i knew which one, but its looks to be somwhere between a gt22 and gt25)
2" downpipe
2" test pipe
t1r cat-back
RC370 injectors
2" IC pipe
DSM BOV
8 psi

tuned at sea level

14.7 idle
15-13.5 normal driving, in vacuum
13.5-12 as boost increases
11.7 full boost in summer (90+ degrees)
12.0 full boost in the colder temps (40ish degrees)

known problems:
1. partial throttle, when slowly accelerating from a stop it sometimes has a stumble around 10-15 in vacuum. goes lean to about 16 for a split second then recovers to where it should be.

2. after driving any distance and coming to a stop, a/f stays around 13-13.5 for 20-30 seconds, then recovers to 14.7. timing is also advanced a few degrees when the a/f is in the 13's

 

could you convert that to the older FIC program...the non beta one?

 

Did you need to do any modifications to get the rdx injectors to work (aside from base fuel map tune) or are they plug and play?

 

Also, I'm just talking out of my ass here, This is my first time looking at an fic map, but do you have to put the injectors on such a high load durring vacuum? 15 psia and under are all at -%28 which seems like it should be running stupid rich in my minds eye. I picture making the rdx injectors look as much like the stock injectors to the ecu, but at -28% on 410cc injectors, they would behave like 295cc injectors during closed loop to the ecu and your fuel trim adjustment factor would be at -39 which is just barely even within the limits of the fuel trim (max is usually +/- %40), I just always thought the fuel map would look like a linear increase over 15psi.

This is what I'm picturing:



What is your LTF at?

 

need help with ECU pinout for GD to FIC...

 

Yeh, they need to be sanded off on the sides so they will slide into the stock injector connector.....not a big deal really. once you get the first one figured out the other 3 take 30 seconds.

 

...also remember that 14.7 psi is sea level as far as the FIC goes...so when looking ta the table 15 PSI is really 0.3 PSI to the engine/turbo...

 

Tunadaman's Fit RDX 410cc Injectors Tuning.fi6

HKS Honda Fit Turbo Kit w/ black black ssvq bov
-Tuned with AEM FIC (obviously)
AEM Dryflow Air Filter
Stock exhaust
RDX 410 Injectors

tuning:
Idle/ cruise around 14.7-14.8 (any lower and the code gets throw)

 

LOL, i cannot load read yr fi6 file, due to u are using 3.04.
but my is version 3.05, don't know why cannot read 3.04 file

 

Im using the 3.06 so it's not a problem on my end

 

worked fine for me! 3.06

 

Can anybody please post detailed GD ECU pinout? I'd be interested in both front and rear O2 pins and throttle position, too.

Thanks a lot,

 

RDX injectors are 50 bucks from the local honda dealer, what a deal! Is there a specific year to purchase or are they all the same. Thanks in advance. -Cam

 

I think they are all the same. If you want to make it a cleaner install, you can also look up I believe scion tc injector clips and look up information on how to change the clips without cutting them, basically taking the ends out of the stock clips and putting it in the new tc clips. I actually found the injectors on eBay for like less than 200 shipped I think. But I was patient

 

Wow, great piece of info. Thanks a bunch

 

JHPusa has RDX 410 injectors for $179 and the harness if needed for $60. I think I'm gonna end up going with the RDX injectors. I do have one question and I know its off topic, but using the 410 injectors, is anyone using a better fuel pump or just the oem one? Thanks and sorry.

 

Because we have a returnless fuel system, you would probably be better off getting something like a boost-a-pump from kenne-bell

How much air are you planning to move?

Because of our 52psi base fuel pressure, you should be able to support about 300whp on pump gas or ~30-33lbs/min airflow on the injectors.

I am not sure where our fuel pump becomes the weak link, but running it @ 16.5v should stretch the limit considerably.

The popular walbro 255HP (gss341) picks up about 40l/hr flow for ever 1v increase at the pump.

 

Thank you. I only wanna push about 10-12lbs of boost. Do you think the RDX injectors are too much for the lbs i wanna push? I really just wanna use my oem fuel pump

 

What turbo are you on? I am talking about mass air flow when I said 30-33lbs/min not boost pressure in psi. Sorry guess I should have clarified..