West Yorkshire R/R Day

[sx_turbo]

the a/f should be between 11.5 + 12.2:1


it looks like there it's running 9.5:1 which is very very rich and close to bore wash.

but judging by that it starts off ok when boost id building up, but as soon as it hits full boost it runs stupidly rich.

i would advise getting it mapped again by someone else, and see how it goes, you should be able to gain quite a bit more power there. either that or thers a different problem with your car like the lambda sensor being up the spout.

a friend of mine suffered from the same thing as you, took it to another tuner, and made 30bhp just by sorting the a/f ratio out

 

[munday]

the a/f should be between 11.5 + 12.2:1


it looks like there it's running 9.5:1 which is very very rich and close to bore wash.

but judging by that it starts off ok when boost id building up, but as soon as it hits full boost it runs stupidly rich.

i would advise getting it mapped again by someone else, and see how it goes, you should be able to gain quite a bit more power there. either that or thers a different problem with your car like the lambda sensor being up the spout.

a friend of mine suffered from the same thing as you, took it to another tuner, and made 30bhp just by sorting the a/f ratio out

Well for best power you want a Lambda of between 0.9 and 0.88, so a AFR of between 12.94 and 13.23 :teach::drive:

 

[sx_turbo]

Well for best power you want a Lambda of between 0.9 and 0.88, so a AFR of between 12.94 and 13.23 :teach::drive:

i would have thought thats a bit to lean on these turbo'd cars, it's fine for cruising as when cruising you want an a/f of about 14.7-13.5 really.

when on boost you should aim for a/f of 12.2-11.5.

i'm just going by what my tuner has told me and kon and a couple of others.

 

[munday]

i would have thought thats a bit to lean on these turbo'd cars, it's fine for cruising as when cruising you want an a/f of about 14.7-13.5 really.

when on boost you should aim for a/f of 12.2-11.5.

i'm just going by what my tuner has told me and kon and a couple of others.

I got these figures from a mapper (and also lecturer) who has mapped for touring cars, paris dakar Le mans etc

 

[TO82]

i think running slightly richer on boost is a good idea, and safer. So i agree with sx turbo, sorry munday! lol

 

[munday]

i think running slightly richer on boost is a good idea, and safer. So i agree with sx turbo, sorry munday! lol

Swivel on it

Throw all that wasted petrol down the exhaust why dont ya

 

[cole]

hey cole - sorry to hear your results, i told you b4 i wasnt impressed with rs not really because of my figures but because of the service i got cos i was still getting knock. does your car feel the same as when you had it mapped, maybe something as broke or isnt working properly.

it feels the same as when it was mapped nothings changed
mine is exact same as akkis side by side and he made 60 bhp more than me il have to take u for a spin in mine and see what you make of it pm me when your free

the a/f should be between 11.5 + 12.2:1


it looks like there it's running 9.5:1 which is very very rich and close to bore wash.

but judging by that it starts off ok when boost id building up, but as soon as it hits full boost it runs stupidly rich.

i would advise getting it mapped again by someone else, and see how it goes, you should be able to gain quite a bit more power there. either that or thers a different problem with your car like the lambda sensor being up the spout.

a friend of mine suffered from the same thing as you, took it to another tuner, and made 30bhp just by sorting the a/f ratio out

whats bore wash ?

and i did change the lambda sensor when i changed the turbo kit it was because i couldnt get the old 1 out my cat so i used 1 that some one gave me

what do you recon to this ?

 

[Mike@TD.co.uk]

Did anyone get a boost graph on the day?

 

[wainy]

Did anyone get a boost graph on the day?

not that i no of. i didnt!

 

[Mike@TD.co.uk]

okey dokey, ta

 

[stedee]

all i know about bore wash is it can knacker your engine - too much unburnt fuel

and yeah i would like to compare, mine is quick as fcuk upto 5k revs in 1st to 4th but after 5k its flattish. - i`m off in the week - work weekends

i was going to come the other day just to meet everyone but my next door neighbour decided to keep me awake - dickhed so i couldnt get up at 1ish to come along.

it might be worth getting a new lambda btw that shop in heckmondwike sell universal ones for 30 quid, i bought one the other day and it worked fine for mine, i have a feeling something isnt right because he wouldnt map it like that, if it was nick hes got a wideband hasnt he???

 

[munday]

whats bore wash ?

When you have so much petrol it washes away the lubrication in the cylinder, its not something you really have to worry about unless running insanely rich

 

[sx_turbo]

I got these figures from a mapper (and also lecturer) who has mapped for touring cars, paris dakar Le mans etc

you win lol

 

[sx_turbo]

it feels the same as when it was mapped nothings changed
mine is exact same as akkis side by side and he made 60 bhp more than me il have to take u for a spin in mine and see what you make of it pm me when your free




whats bore wash ?

and i did change the lambda sensor when i changed the turbo kit it was because i couldnt get the old 1 out my cat so i used 1 that some one gave me

what do you recon to this ?

if its a new lambda then it's doubtful, but i would replace this first, and get an rr done again should only be £30 for a power run and to see how it's fuelling.

borewash is where to much fuel is getting into the cylinders, going past the the rings and then going in your oil, making your oil to thin and contaminated, and eventually break your car.

 

[Kelly]

Well for best power you want a Lambda of between 0.9 and 0.88, so a AFR of between 12.94 and 13.23 :teach::drive:

maybe for the best power but for safety and reliability most uk tuners wont push the 4efte (un forged) past high 11's.

 

[TO82]

The same lecturer who told him that said running slightly richer than 14.7:1 will also produce more power.

 

[munday]

The same lecturer who told him that said running slightly richer than 14.7:1 will also produce more power.

:holdit: Yeah and 12.94-13.23 AFR is slightly richer than 14.7

Kelly - You are right, running slightly richer will reduce temps in the cylinder, but will be slightly detrimental to power (cant say by how much) but nobody should need to run any richer than 13.23, because it should not induce cylinder temps too high for the piston to handle.

:rockon:

 

[TO82]

:holdit: Yeah and 12.94-13.23 AFR is slightly richer than 14.7

Kelly - You are right, running slightly richer will reduce temps in the cylinder, but will be slightly detrimental to power (cant say by how much) but nobody should need to run any richer than 13.23, because it should not induce cylinder temps too high for the piston to handle.

:rockon:

You stick to your narrow band readings! lol

No your right, but suppose it depends on what someone wants from their car and also whos is mapping it, to what afr they think is best.

 

[sx_turbo]

i would assume an a/f of 13.23 is fine for race cars but what about everyday cars?

or is it the same principle?

 

[Nick@TD.co.uk]

i would assume an a/f of 13.23 is fine for race cars but what about everyday cars?

or is it the same principle?

Its all down to each engine, as long as EGT's, Detonation etc are all ok then a engine in near new condition should run around them AFR's but theres so many factor's its hard to run around them AFR's on a road car, Low 12's is safe as long as theres no detonation or EGT's are not to high (Uk 4E owners dont really need to worry to much)

~Nick @ Tuning Developments