YewllowDA

iTrader: (1)

I have a plx m300 wideband installed.
For idle, it reads mid 13s to low 14s
For moderate acceleration from stop, it reads between low 15s to mid 16s
For wot, it reads in the 15s

its an untuned stock b20vtec and was wondering if the numbers above are not hurting it. and ive been running it like this for more than a year now and seems like its been running ok since. i just didnt have a chance to post this earlier..any comments recommendations would be much appreciated thanks..

GagnarTheUnruly

iTrader: (3)

Stock B20vtec does not compute.

What is your ECU?

Mr. EG

If those AFR's are correct you new to get to a tuner ASAP

FlewByU352

That seems wicked lean. At least turn up the fuel pressure if you don't have a way of truly modifying the tune.

DDTECH

That wont do squat.

Your partial throttle and idle is fine.. stop beating on the car until you get it properly tuned.

FlewByU352

Why? How does increasing fuel pressure not richen it up?

DDTECH

It's not going to richen it up a whole 2 points in WOT , which is where he needs to be. (12.8-13.3 AFR WOT). Even @ 45+psi it wont make that big of a difference.

GagnarTheUnruly

iTrader: (3)

Edit: nm

YewllowDA

iTrader: (1)

chipped p72. w/ a b20vtec chip from phearable...

actually, for wot, my ratio would actually go down to mid 13's if i hold the gas wot a little longer.
but i dont do this a lot when driving which prolly explains why it hasnt blown up. but i will def get this tune, its just that im waiting for jrsc to be installed around winter break so i only have to tune it once.


for now, i have an adjustable b&M fuel press reg. it is currently 46 psi. i was wondering what will be the highest and safest pressure i can go?
my base timing is set 10 deg btdc.

actually last month, i failed only knox in emissions testing..
i ended retarding the timing all the way. the knox went down a lot. CO also went down a bit. But HC went up a little. And yeah finally passed. the car has almost no power, and i ended up putting it back to 10 BTDC..

again thanks for the comments guys.

q16racer

it doesnt change the AFR linearly.

what you fix at idle, will only throw off your mid throttle and/or WOT.

fuel pressure does not fix a bad fuel mixture.

GagnarTheUnruly

iTrader: (3)

Your idle is a little rich but around town is mostly OK. I think you'd be OK if you just took it easy until you get the tune. No WOT, no VTEC.