Originally Posted by
ianbobo
Need your help about these exhaust test results obtained during VRT test (Hot engine idling at 900 rpm):
CO = 1 to 1.5%
CO2 = 14.9
O2 = 0.53
HC = 142
lambda = 0.987
Temp = 70 degree C
vehicle is sapphire cosworth 4x4 red top standard engine and T3 turbo, MSD (blackpool) stage 1 chip, mongoose exhaust, K&N air filter, 2 bar map sensor, 071C spark plugs gapped 0.7mm, Bosch 044 rewired fuel pump, 3.5 bar fuel pressure, - 31 acuator, standard fuel injectors.
Are these figures correct ? I suspect they aren't. A previous test, some 2 years ago showed CO at 2.61%. Since then the only changes made were a new alloy radiator+ intercooler internal cleanup/flush + oil change from mobil 1 15/50 to Titan race pro-s 10/50.
Whats your verdict?
Many thanks for your valued advice.
I'd say the reading look fine, was it boosting ok with the old intercooler as the old one could of had a pin hole cause it to suck in air causing the higher CO, also was the last test done at the same engine temp as a colder engine gives off more CO