Quote:
Originally Posted by leicaboss
Haha, well I was asking because in other applications - changing the intake manifold completely (for a perf. oriented one) would often result in a decrease in gas mileage.
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So after putting on roughly ~600 miles on the car since the Crawford Power Blocks were installed, here's what I find on mileage (see below) and other impressions:
- Approximate highway gas mileage is the same. I'm running wide tires for street, and with winter blend fuel I'm averaging around 28-29MPG.
- City mileage seems to be slightly worse. Not really attributing this to anything other than perhaps a bit more liberal with gas pedal on streets, but my driving style hasn't changed much. Should be noted that the decrease in fuel economy includes the ~60 miles worth of dyno pulls that was done testing both the Crawford pieces, as well as 3 different Ark Design exhaust systems for MotoIQ.
- 5 tanks prior to install of CPB: 1111 miles, 1 track day @ Big Willow, 24.35MPG
- 5 tanks after install of CPB: 865 miles, 1 track day @ Chuckwalla Valley Raceway, 23.46MPG
- Car definitely feels faster on streets. Throttle response 3500-5000 and above 6000 is great, with no difference in exhaust note or engine noise. My engine currently is stock with no mods.
Hope this is enough data to help.
-alex