2002_B5_S4

I have a stock automatic transmission, with stock gearing. At 65mph im revving 2400 Rpms. The tires are inflated to the recommended amount, and I usually don't run the A/C when I'm doing a gas mileage test. 32mpg was the best I ever got back when the car was completely stock. Porting the engine increased the volumetric efficiency of the motor, and I don't mean hogging out the ports and making them bigger! Keeping the ports roughly the same size and polishing them keeps your overall port velocity higher. This is all ive done to my S4, I still have a stock Ecu tune, tuned length headers, K04 turbos, stock exhaust with resonator delete and thermal wrapping it all the way to the rear, porting and polishing the engine, and I did modify the intake manifold.

Khalib Hyatt

[QUOTE=2002_B5_S4;24823728]46-47mpg recorded the other day on flat ground along the river road, doing 60mph with the cruise control set. - 5400ft / 78 Degrees -

Upgrades are stock Ecu, (port and polishing the heads and intake manifold = 60-70% of the overall increase) then some K04's, tuned length headers, wrapping the stock exhaust back to the muffler after removing the resonator (for better flow and heat energy the more you can increase the exhaust temp the faster the pulse waves flow out the exhaust) and I'm running the stock air

Khalib Hyatt

Can you tell me exactly what you did to do that I’m looking into buying one and would like to know everything about that car before I buy it

mnsmtrsurs6

"2002_B5_S4" are you looking at the "Instantaneous MPG" figure calculated by the computer (not the actual Average MPG) at a particular 'perfect circumstances scenario', like you described (already at highway speed, on level ground, probably with a tail wind, lol - many cars could read that 'Instantaneous' for a given set of perfect circumstances), instead of actually calculating Average MPG yourself, over many miles, using (Miles Driven / Gallons filled)? If so then an instantaneous reading, given those circumstances, is really not helpful to answering the question of the OP - I believe he's looking for an Average over say 200 or 300 miles. Seriously hard to believe 40, my friend, Because if these motors can get an AVERAGE 40 MPG then there would be no reason to go electric ! Or use a much smaller motor, such as a 1.4L Turbo to gain the higher volumetric efficiency !