Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - How come my MAP is higher? What controls it?

dcb · 04-08-2009, 07:37 AM

A clean air filter can make a difference in map. Engine needs a certain amount of o2, and there will be a bigger pressure drop over a dirty filter.

I assume hydraulic lifters so not sure what they would adjust on your valves though.

04-08-2009, 07:37 AM	#2 (permalink)
dcb needs more cowbell Join Date: Feb 2008 Location: ÿ Posts: 5,038 pimp mobile - '81 suzuki gs 250 t 90 day: 96.29 mpg (US) schnitzel - '01 Volkswagen Golf TDI 90 day: 53.56 mpg (US) Thanks: 158 Thanked 269 Times in 212 Posts	A clean air filter can make a difference in map. Engine needs a certain amount of o2, and there will be a bigger pressure drop over a dirty filter. I assume hydraulic lifters so not sure what they would adjust on your valves though. __________________ WINDMILLS DO NOT WORK THAT WAY!!!