leecavturbo

just got a wideband and at WOT full load, 1 bar and 14.0afr
no det!
is that possible?
with the afr being so lean?

Chip

iTrader: (3)

Its possible if its retarded enough.

BAD mapping though, as you are making less power and more heat than you would at low 12s!

Ima Racing

iTrader: (1)

wow thats lean lol...great fuel economy though...needs to be high 11's or if competant to map go to early 12's,you must be seriously retarded too,no pun intended.lol

costina

iTrader: (1)

Thats sooooooo leana good mapping session should see you more power imo

Paul

CossieRich

iTrader: (1)

Lean doesnt necessarlily mean det. It definately means mega heat though

GARETH T

remember the term lean is a relative term!

DangerousBryan

thought it had been mapped loads of times lee?

bryan

leecavturbo

its strange cause at the last RR day at jamsport
fueling was spot on. and the plug colour is perfect
maybe the wideband is out

Rs1

iTrader: (1)

Where abouts in the rpm range is it at 14, surly not all the way to the limiter?
Does it not transition from 14 on first application of WOT down to 11.5-12 as revs start to pick up?
Also what gear were you testing in it and where is the probe mounted(distance from turbo)

Chip

iTrader: (3)

Have you changed anything since then?

Specifically something that would effect it's fuelling a LOT like for example put a big intercooler on it in place of a fairly restrictive one?

leecavturbo

fpmsl. it only dropped act's 10° would that do it?

Chip

iTrader: (3)

Give me a ring, easier than 10 pages of forum chat to try and explain stuff.

foreigneRS

hopefully chip will explain it, but it's got little to do with the change in density of the air by the reduced temperature, and more to do with the fact that a reduced pressure drop will allow a greater mass flow of air

AlexF

how do you know its not detting?

Chip

iTrader: (3)

He doesnt know that, he thinks he knows that cause it was det checked before he changed things, now though it may well be detting horrifically.

DANGEROUS game changing things in a speed/density based system without knowing the effects.

AlexF

Arr I miss read the 2nd line lol

Garage19

Well that would do it.

I wouldn't drive it until you can get it mapped again.

If you need a quick fix you could probably send me or chip your fuel map and afr log so one of us could make some quick changes to get you out of the danger zone.

Chip

iTrader: (3)

Ignition is less easy to guess at though, he NEEDS it mapped again really given how hard it gets used.