hi chaps,
i own a 2wd saff running stage 2 330bhp
ive been told to set the CO at 5%-6% ?
got m.o.t soon and max for failure is 3.5%
if need to adjust is it the white screw in ecu ? how many turns & which way ?
if anyone can confirm any or all above i'd be very gratefull
cheers mick

 

need to ask who ever wrote the chip,

if they tell you 5% i would throw the chip in the bin. There is no reason whatsoever for it to run that rich, unless they cant map

if you tweek the global mod screw you have to check the fuelling flat out under full load or it may melt

 

i thought the co2 screw was just for tickover ?

 

you thought wrong then,

its name is the GLOBAL modifier, and it adds or subtracts a percentage from the whole fuel table

 

what shall i set mine to ,i ordered your 380bhp chip today.I have a wideband afr gauge in the car what should it read on idle ?

 

all covered in the instructions which come with the chip mate

 

cheers,looking forward to fitting it

 

Thanks for reply mate i get what your saying
gone back thru cars receipts all engine work carried out by CASTLE PERFORMANCE ENG back in 2003 rebuilt engine 7:2:1 comp
ahmeed bayjoo chip - green inj - 3 bar map - t34 turbo - 4x4 intercooler - mongoose zorst

 

ahmeds software is very good, should have no problems with that tbh.

ususlly idle co content is around 2.5% on those

 

thanks 4 reply mate
it was M & A DEVELOPMENTS suggested 5%
dont know setting yet so m.o.t time will tell me
just thought if it was high i could do a quick adj instead of them failing it !
so which way to turn white screw and how many turns m8
thanks again mick

 

depends what ecu its on,

should become clear when you tweek it, as long as there are no faults causing the rich running

 

5% is very very high!

open the ecu and see if the chip has a name & serial number on it; if it hasnt i would get a decent chip for your spec

 

what does 3% CO equate to in afr ?
cheers matt