General 1G injectors, walbro, 14b and tuning

[GST StreetRacer]

hi guys

well right now my most important mods are:
unported 14b
upper and lower I/C pipes w/ greddy type-s
stock side-mount I/C
2.5 press bent turbo back
wires/plugs
mbc @ 17-18psi
s-afc and pocketlogger
walbro 255lph
stock injectors

i got it pretty tuned(by myself, keeping in mind i'm a newbie for tuning) and i find myself with the following problem: O2s are at a constant .92v through the whole RPM range, but my timing when i go wot goes down to 7 or 8 sometimes, and it never goes any higher than 14 at 7000rpm, EGTs get a little over 900c at about 6700rpms, my questiong is, is it that i could be maxing out stock injectors?, i have a brand new set of 550s sitting here right now, should i put them on? or does this tell me that my car likes to run rich and thats why it wont advance timing even though i'm only at .92v O2s, also this are the same timing numbers i get at 15psi and 16psi, could it be a bad knock sensor, but if it was, wouldnt it cause the CEL to come on?

***oops i just noticed this provably goes better in the electronic tuning forum***

 

[IPT]

Add some fuel!! On pump gas EGT's should NEVER go over 900c. Lookinjg at your timing curve is there any flat spots or places it gets pulled if so. Just add some fuel in those areas.. Tuning with the timing curve and EGT and just use the O2's for refence to get and idea where you are..

Hope this helps.

 

[NJGSX96]

Add some fuel to help cool it down some. You biggest problem is that stock SMIC.

 

[purplefever]

!!! 900c = meltdown
it happened to me

 

[GST StreetRacer]

really?
i've heard that its not fatal, u just arent making any power anymore, i read it from RRE's website

 

[GST StreetRacer]

Originally posted by IPT
Add some fuel!! On pump gas EGT's should NEVER go over 900c. Lookinjg at your timing curve is there any flat spots or places it gets pulled if so. Just add some fuel in those areas.. Tuning with the timing curve and EGT and just use the O2's for refence to get and idea where you are..

Hope this helps.

ok so i tune for optimum timing, wich is 10 at WOT and should go up to around 19-20 at the top of the gear

 

[purplefever]

put it this way.... i cant even pull my plug wires off, everything is melted to hell. i actually ripped 2 of my wires trying to get them off.
true story. my friend took a turn, and his friend took a turn, pulling on the wires while standing on my motor. we had to hold him up in case he went flying off. drama

 

[GST StreetRacer]

damn, well, there is ur excuse for a built engine then, JDM engine, forged rods and pistons, and then its just aiming for 10s he he he

 

[purplefever]

got one coming. it should be here tomorrow.

 

[GST StreetRacer]

u must be very.....exited

 

[jw]

The timing never got above 14 could be a few reasons. Either you have knocks and the timing got pulled. Or your AFC settings are on the + side (telling the ECU more air and thus more fuel) and that put you in the less aggressive timing table.
The 550s would solve your problem.

 

[GST StreetRacer]

so in a perfect world, which is a completle setup including a front mount, maybe even a stand alone i should worry more about the O2s, but for now i should focus my tuning in timing and egts

 

[jw]

I wouldnt even look at the stock O2. They are useless. Focus on timing, EGTs and knock sums. Dont just concentrate on one reading, look at all to determine the state of tune.
If you want to tune by O2. Get a wideband.

 

[GST StreetRacer]

hi guys i'm running the set-up it says in the subject, and i'm wondering if anyone of you is running the same and could give me good high settings, i already tuned the low settings.

 

[larryd]

settings are really car dependent just so you know.. you can get a base idea off of someone elses settings but just cuz its best for them doesnt mean its best for you

 

[GST StreetRacer]

yes i know , but i just need some base settings so i can go from there, the problem is i have a slipping clutch, so i just want to have a good high setting for when i'm not in low throttle, like over 30% but under 80%, understand

 

[larryd]

not sure off the top of my head, but does RRE have any settings for the14b?? I know they have stuff for the 16g

 

[BatmanGSX]

Assuming you have all your honeycombs in you can start with about -18% across the board on the low setting. Mods don't really effect idle/low/part throttle too much so assuming your air metering is like stock you need to scale airflow down so that the 550s are giving you no more fuel than 450s will. -18% on the airflow should give you around -22% on the IPW which is about right for 550s. Then on the high throttle you need to log it. But I would start out with -18% across the board and let the airflow sensor handle the actual mixture, then fine tune it.

Beyond that I could get really complicated explaining all of it but basically since you have an unmolested 2G MAS you just add bigger injectors and take a proportional amount of airflow out with an AFC and the MAS does the work. With a 1G and their overruning MASes you have to hack the MAS and all that BS and AFC tuning becomes less straightforward. With a 2G MAS you don't have to deal with that until you are running a turbo bigger than a 20G.