VRT exhaust emissions
#1
oohmamama
Thread Starter
VRT exhaust emissions
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.
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.
#2
The annoying ginger guy
iTrader: (2)
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.
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.
#3
oohmamama
Thread Starter
Ginger turbo,
Intercooler was never replaced just internally flushed clean of oil residues tested for air leaks, none of which were found, and re-installed back in place. Oil temperatures are in fact cooler by some 10 degrees C and this I attribute to replacing the factory radiator with a 50 mm alloy radiator. Somehow I have a feeling the CO level is low. I asked the test station operator about this and he remarked that the lambda value was perfect, and that this value was the main parameter showing the quality of the air fuel mix.
I'm open to more advise
Intercooler was never replaced just internally flushed clean of oil residues tested for air leaks, none of which were found, and re-installed back in place. Oil temperatures are in fact cooler by some 10 degrees C and this I attribute to replacing the factory radiator with a 50 mm alloy radiator. Somehow I have a feeling the CO level is low. I asked the test station operator about this and he remarked that the lambda value was perfect, and that this value was the main parameter showing the quality of the air fuel mix.
I'm open to more advise
#4
big floppy donkey dick
Join Date: May 2003
Location: Rouse Sport heaven ;)
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forget the intercooler change
you could take off the throttle body pipe and it would make no change as there is no fuel metering via the intake system from turbo/air filter and its all done via the MAP sensor and the water temp sensor in the head
you need to check their values with a ohm meter before you do anything
check at the sensors, then at the ECU incase its got a shagged loom
hope the above makes sense
you could take off the throttle body pipe and it would make no change as there is no fuel metering via the intake system from turbo/air filter and its all done via the MAP sensor and the water temp sensor in the head
you need to check their values with a ohm meter before you do anything
check at the sensors, then at the ECU incase its got a shagged loom
hope the above makes sense
#6
oohmamama
Thread Starter
forget the intercooler change
you could take off the throttle body pipe and it would make no change as there is no fuel metering via the intake system from turbo/air filter and its all done via the MAP sensor and the water temp sensor in the head
you need to check their values with a ohm meter before you do anything
check at the sensors, then at the ECU incase its got a shagged loom
hope the above makes sense
you could take off the throttle body pipe and it would make no change as there is no fuel metering via the intake system from turbo/air filter and its all done via the MAP sensor and the water temp sensor in the head
you need to check their values with a ohm meter before you do anything
check at the sensors, then at the ECU incase its got a shagged loom
hope the above makes sense
#7
big floppy donkey dick
Join Date: May 2003
Location: Rouse Sport heaven ;)
Posts: 4,514
Likes: 0
Received 3 Likes
on
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we have hairy balls, not chrystal ones!
yes they look fine on a PC screen
its purely dependant on the values your car is giving out!
it may have a split in a exhaust gasket giving more oxygen to the emissions probe when the values are worse that seen
unless you know what your car is seeing to/from the sensors no point doing anything else to be honest
yes they look fine on a PC screen
its purely dependant on the values your car is giving out!
it may have a split in a exhaust gasket giving more oxygen to the emissions probe when the values are worse that seen
unless you know what your car is seeing to/from the sensors no point doing anything else to be honest
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