what would you expect the CO / hydro carbon level to be on a well set up stage 3 2wd saff, running the the usual greens/t34/chip/3bar /22psi etc????

 

well above the legal limit but you turn it down with the co screw for mots, stage 3with a mongoose usually likes between 3 and 6, i think the mot is 1.5 . cheers nomad

 

mines at about 4% but its still running lean at the top end you see, although the plugs are getting black so thats poss to much fuel down low? so was wondering what every one elses was set at!

 

4% at tickover ?sounds fine. the co screw only controls the co at tickover, once the engine is revved then the chip takes over, if your engine is running lean at top end then its a chip problem , you need to talk to stu (motorsport developments) , some dyno "experts" who say a chip is running lean at top end dont have a clue as to how the management is set up, other times it could be that your running more boost than the chip is set for (but 22psi isnt a lot for stage3 and greens) cheers nomad

 

mine's set up 2.5% on tick over on stage 3 set up ,

also have a Cossie running greys at 3% on tick over, many moons ago people DID have to run alot more on tick over and say it was because of running bigger injectors etc but NOW technology has come alone way so NOT needed to(maybe your chip etc is one of them)!


the CO screw on the ecu I do believe changes the fueling all the way through the rev range and NOT just on tick over!

 

mine runs fine at 14.5:1 afr, about 0.5%, abit lumpy. runs alot smoother at 2%.
thats with 500bhp engine on 8 greens.

if spent abit of time wen mappin can get the co right down. and run smooth

the mixture screw is only for idle, as wont even notice the diff at top end, thats all done to map, and fuel pressure its been mapped at.

 

no dan the idle co pot is a base multiplier for the entire map, piss about with it at your peril

 

alvyn nope , the co screw is for tickover only, whats technology got to do with anything ? some people on here boast 1% with greys , mate had it done but no 1% was ever seen. cheers nomad

 

matt the expert.

 

Matt,

In actual fact it is a software switchable option if its a global multiplier or not.

MOST chips only have the CO enabled for IDLE and LIGHT load adjustments only.

It is hard to say who's chip has what kind of setting.

Generally aim for 2-3% CO as this results in a decent idle.

 

i tend to take more note of a secs post

 

got any more leads for sale nomad? i sold your shit on ebay, the only place they belong

 

and my map is a base for the entire range thanks

i tend to no longer buy the fake shit you palm off

 

mine must be aswell then

 

nomad, which advice is btter?

1) yeah, adjust the screw all you want mate, only does idle...
2) no, CO screw adjusts the multiplier! dont touch


now, given tht there are 2 possibilities as to wht could happen if you touch the screw, which advice do you think is sensible to give to people on a public BB? (remembering most people believe EVERYTHING they read on the internet )

 

clearly nomad knows best here jim

ask him about wanky bling paint instead, he knows about that

 

matt theres an old saying
"the more horse power your car has the more you think you know"
and its so true. cheers nomad

 

jim i took my car down for its mot, it failed on co, i turned the screw gently to bring the co down, went through the mot, turned the screw back up to 4% and everything was hunky dory for ever after, the ONLY way to get my car through the mot was either do this or take off the greens,chip,3bar. now i have always been told by real people that the co screw ONLY affects tickover, i do tend to believe these real people , they are not out to sell you something you dont need. cheers nomad

 

oh so below the belt, pity my car fetched over 9K in bits, most was spent by some guy buying my wanky bling paint job shell

 

he sounds as foolish as these real people you have previously spoken to about mapping

 

Martyn,

If there's a chance that turning the CO down could affect the rest of the map, which it could as we don't know the origin of the chip or the ECU, then why suggest it?

 

matt right ho
richard you can always turn it back up again ? whats the big deal with moving you co screw ? if you remember where it was in the first instance then it dont mean a shit what you did with it in the meantime, so long as you return it after the mot !!. if ford didnt intend that screw to be moved then they would not have made a nice screwdriver friendly hole . believe me. if people want to make a chip that disregards the ford way of of life then they should print it onto the chip face. cheers nomad

 

im not disputing the fact that you can turn it down for the mot and return it after, im disputing your pisstakes out of me for your inability to believe me telling you something you didnt know. believe me.

 

if its running 4% anyway the fookin thing's illegal and you shouldnt buy shite chips off these "real" tuners

especially on greens

 

only just noticed this , god your a fuck*n prick. matt we sell fuck*n thousands of cosworth lead sets, most (in fact all ) of our sellers say that they have far fewer problems than with magnecor (which are loads more money) personally matt i dont give a f*ck about your comments , you are a nobody as you well know, we sell parts that we are proud of and thats what makes us , we sold 39 sets of 4wd and 28 sets of 2wd last week !!! work that fuc*er out .cheers nomad ps refer to previous post about bigger horse power equalls more knowledge and subtract 100

 

jim were are talking real cosworths here (not 24v scorpio), with real exhausts,
matt (pondlife) talkings over,

 

so you're very observant aswell as as a cluless twat

magnecor are shit too so thats a great comparison

please refer to your own saying big man

 

matt (pondlife) talkings over, if you cant hold a proper conversation then the talkings over, refer to previous post but now deduct 200 for stupidity. cheers nomad

 

please come back with a retort i have so much ammo

 

no thanks good night tuner man

 

fair enough, i dont tune i just tell it like it is. cheers nomad

 

oh and i also supply a lot of parts to the trade ,most of which yo would never know. cheers nomad

 

My guess would be that by adjusting the CO level it would change the fueling through out the rev range, when i first bought the car i took it to be tuned by someone in the spot light so to speak who i thought would know what they were doing! They found my CO level to be up at around the 8% mark, so they adjusted it down to be at around 3% but never tested to check how that adjustment had effected the fueling through out the rev range! An the very next day the eng melted a plug causeing all kinds of damage! Now i have a new eng, but i would like to fully understand if poss how it should be set up an what level to if poss!

 

Ok,
on 95% of Marrelli installations the idle trim adjusts the fuelling everywhere from idle to hard boost. Do not mess with this screw without the equiptment to check what you are doing. As Martin says though, if your putting it back where it was you will obviously be ok.

However...
Why any YB motor would need in excess of 3% is beyond me totally, and round here they will likely impound your car for you if you fail the roadside check, so beware.


Just to be pedantic here... the hole was tamperproofed from new


Call your mapper / chip tuner, and ask them what CO level to set it to and under what conditions. If their advice is illegal and your not happy, all you can do them is change software. Hope This helps.

 

ok I meant better soft ware programmes are now available so NO need for illegal road CO readings etc! so the final answer to the Question 1st aksed IS?

 

Have you missed my reply?

 

mine was 6.8% when it went for its MOT.

Adjusted it down to 4% and got it remapped

 

[Have you missed my reply? [/quote]

NO m8 just making sure every one see the correct answer

 

 

yeh it was