A/F ratio and EGT questions
04-09-2007, 02:12 PM
#1
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A/F ratio and EGT questions
What A/f ratio is a normal when running at full boost(1bar stg1)?
And what maximum EGT is normal when the sensor in the downpipe(5cm from turbo)?
Thank you!
And what maximum EGT is normal when the sensor in the downpipe(5cm from turbo)?
Thank you!
21-09-2007, 06:54 AM
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Originally Posted by tabetha
AFR around 12.6, egt as said.
tabetha
tabetha
What temperature will be in exh. manifold before turbo if in downpipe we have 800-850, what the difference?
Thanks!
21-09-2007, 07:21 AM
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I had only around 700° max. @ low 12... tried everything (changing the ignition timing and fuel map) but it never achieved 800°??!!
egt in the collector would be intresting!
egt in the collector would be intresting!
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21-09-2007, 08:32 PM
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Hi,
You can generally expect about 100 deg c difference across the turbocharger. The exhaust gas has to give up heat to drive the turbine, so therefore if you are seeing EGT,s in the downpipe of 750 deg c, upstream of the turbo will be nearer 850 c.
Anything much over 900 c pre turbo temp is likely to cause damage to the turbo though, oh yes not forgetting that the AFR is a important factor hear as well! A leaned out fuel situation could push the EGT even higher still, but by the time you realise that your engine would have probably melted.
CHeeRS, Mike.
You can generally expect about 100 deg c difference across the turbocharger. The exhaust gas has to give up heat to drive the turbine, so therefore if you are seeing EGT,s in the downpipe of 750 deg c, upstream of the turbo will be nearer 850 c.
Anything much over 900 c pre turbo temp is likely to cause damage to the turbo though, oh yes not forgetting that the AFR is a important factor hear as well! A leaned out fuel situation could push the EGT even higher still, but by the time you realise that your engine would have probably melted.
CHeeRS, Mike.
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25-09-2007, 09:43 AM
#8
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Originally Posted by MTZ1
I had only around 700° max.
vyper, thank you!
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