Post by
Q45tech »
https://forums.nicoclub.com/q45tech-u112.html
Sat Jul 09, 2005 3:12 am
Without a doubt the absolutely worst mod on a Q45 exposed to any Summer heat..........drives the MAF crazy at hot idle........without extensive insulation------- cold air covering to direct outside air in onto filter..
The underhood at idle gets > 160F.
The ecu has a upper limit for calculating air temperature [you are already exposed to summer protective software if the ecu coolant temp reading exceeds 194.9999999999999999999999F........when the MAF reads an air density of less than 80% of what it expects as normal [120F ambient] at idle..........it causes ecu to throw up and go into double protection.
As the 100F ambient [110F traffic] passes thru the ac condenser it gains 20F and another 20F [minimum] thru the radiator.........usually closer to 160F.
Takes multiple minutes at speed to drop under hood injested air temp.
As I always point out owners cause the most destruction of Q with their ideas on how to improve the years of work the engineers spent to get it close to right.
Now in winter a K&N cone doesn't cause too many problems other than ring wear and loss of compression but that takes 200,000+ miles of use.