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Originally Posted by FordInPossession
Gas mileage doesn't drop due to a free-flow exhaust and the addition of a K&N Filter.... it improves. I put muffler-less duals and a K&N in my 88 Grand marquis and went from 18 MPG to 21 MPG. Maybe you need to take your foot off the gas every once in a while and actually drive the car, rather than beat the hell out of it. As far as Glasspacks go.... Thrush makes a few adapters that are required to use the Glasspacks they sell. I had an Exhaust Shop (Like Exhaust Pros or Auto-Max) bend up mock pipes to fit where the mufflers did with the stock mounts. Go that route is what I recommend, the 4 cats in the car keep it quiet enough to be tolerable too
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Uhh.. No.
So, you're saying that if a car takes in more air, it'll burn more efficiently?
That's bogus. I don't even think you know what your talking about.
What EEC version are you running, for TPI?
Since when does someone put a highflow filter and exhaust for effeciency or quietness? It's for only one purpose, to add performance, and to make the car into a psuedo-hotrod. Too have the engine breath more and faster. The only downside being the engine wearing faster.
If you put too much air into the system, then it'll run too lean.
The ideal way is to have a proper balance between backpressure, and airflow. That's not my goal, nor anybody else who wants glasspacks on their car.
If you're using it as a daily driver, for highway driving only. I can see maybe the mileage getting better, but here in NY with stop-an-go traffic, the vehicle is DEF a gas guzzler.
I'm not sure here. As a mechanic, I know I can do anything the dealership can do, and this car is running at top performance, and at 122400 miles. It is a Canadian production 2-Door sedan. With only a 15 gallon tank, not 20.
Besides, I don't have 4 Cat's. Only 2, 3-ways. The other's were taken out. And I have P225-50-R16, 8" tires in the rear, and P235-50-R16, 7" in the front. So that's why my mileage is less. Vogue tyres. Centerline Rims.
Have you performed any other sort of customizations?
I'm still doubtful. I can safely say the max milage this car every had was about 18mpg, with stock exhaust and tires/rims at P205-60-R15's.
Later