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1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
Non Member
1407
Fri Apr 16, 2004 4:50 pm
Kent
Non Member
1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
Non Member
1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
David Gentleman wrote:
on a turbo car, air temp at the inlet has nothing to do with air temp in the engine,
Club Member
7463
Wed Apr 14, 2004 7:25 pm
London
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
Stunned Monkey wrote:
Not true. Drop the inlet temp by 20 degrees and you'll drop the charged temp by 20 degrees (roughly speaking) because the same temperature air flows over your intercooler as goes into the intake!
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1514
Tue Apr 12, 2005 12:24 am
Nr Chippenham, Wiltshire
Non Member
1407
Fri Apr 16, 2004 4:50 pm
Kent
David Gentleman wrote:The DIN standard takes into account air temps going into an engine, but this does not work or apply at all to turbo cars..
For instance, if the ambient temps are 50 degrees, then any N/A car has air going into the engine at 50 degrees, but on a turbo car, air temp at the inlet has nothing to do with air temp in the engine, as we all run different levels of intercooling, one car may have 80 degrees, the other may have 60, so no 'correction' factor is accurate on a turbo setup, hence why most people ignore it..
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
Tony Smith wrote:David Gentleman wrote:The DIN standard takes into account air temps going into an engine, but this does not work or apply at all to turbo cars..
For instance, if the ambient temps are 50 degrees, then any N/A car has air going into the engine at 50 degrees, but on a turbo car, air temp at the inlet has nothing to do with air temp in the engine, as we all run different levels of intercooling, one car may have 80 degrees, the other may have 60, so no 'correction' factor is accurate on a turbo setup, hence why most people ignore it..
But the mass airflow temp is measured at the throttle body so surely this is very close to the temp of the air going into the engine - it was 85-90 centigrade on the power run - much to hot to get an accurate reading, when the car is actually on the road it runs 40-50 you can't tell me that won't make a considerable difference to the power. What I also didn't post was that all these figures were taken with an air-locked chargecooler system - it actually boiled after the last measured run and dumped loads of coolant out of its header tank. Doesn't seem to have been working properly since it was reinstalled after the engine build.
Non Member
1407
Fri Apr 16, 2004 4:50 pm
Kent
Non Member
3474
Thu Apr 15, 2004 8:10 am
Colchester, Essex
Tony Smith wrote:that if my car is making 311 on the rollers with everything extremely hot then it is making considerably more than that when I'm out on a clear road on a cool day - we all know how much quicker turbo cars feel on a cool day and the temps these cars reach on the rollers are much higher than on even the hottest summer day. Do you not agree?
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