Ive just had a my car gas analysed at an mot station and they were: CO .0003, PPM 5 and the lambda just made below 1.03 at 3500 to 4500 rpm. What engine revs are used for sva emissions . Do you think this would pass sva?

Cheers Des

dont hold me to this but i though it was 3/4 of your max revs, such as if your engine does 8000rpm they test at 6000 but i might be wrong/confusing this with motorsport...

cant say for sure...

matt

The 3/4 max revs is for the noise test . Mot test levels are around 3,000 rpm

for emmissions its 2500 RPM

for noise its 2/3 max power

as mentioned , the rpm for emissions is any where from 2500 rpm to 3000 , the max for lambda is 1.03 so a little close there but once the revs are between those limits then the reading should come down , ave reading is 1.00 on lambda.

Cheers

Just to confirm

BET / CAT Test

Fast idle (2500-3000rpm)

CO<=0.3%
HC<=200ppm
Lambda 0.97-1.03

Idle Test (450-1500rpm)
CO<=0.5%

(From Mar '04 SVA manual)

Noise is at 3/4 max power as already said

HTH

Ed



[Edited on 28/1/07 by esn163]

IGNORE what I wrote; though you were asking about noise .... and I got that wrong too

[Edited on 30/1/07 by 02GF74]

cheers everyone so which is it 2/3 of max power or 2500 to 3000 rpm?