Aerocivic - how to drop your Cd from 0.31 to 0.17

[TOOSTUBBORN2FAIL]

just wanted to say thanks for the inspiration, i too drive way too much, 110 miles a day just for work, not including any errands or vacation, and it'll be nice when i finished my project and can speed back up from 55 mph

[3-Wheeler]

Originally Posted by TOOSTUBBORN2FAIL

just wanted to say thanks for the inspiration, i too drive way too much, 110 miles a day just for work, not including any errands or vacation, and it'll be nice when i finished my project and can speed back up from 55 mph

I noticed that you get 43 mpg from a Neon. What is your typical drive speed and route to get that high?

I used to have a 1996 Cavalier and squeezed typically 42 mpg by driving old country roads at 45 mph or so. Is this close to your speed?

Jim.

[TOOSTUBBORN2FAIL]

i average 55 mph, mostly freeway. 43 was tank average. That was with a small grill block, passenger mirror delete, low tire pressure (30 psi), underdrive pulley, reduced backpressure, removed power steering, and racing transmission (3.94 final drive, .81 5th)

i now have a larger grill block, both mirrors deleted, and soon will have my other tranny installed for 25% lower cruising rpms (3.55 final drive, .72 5th)

[basjoos]

Originally Posted by JackMcCornack

Man, you may have mentioned this elsewhere on the thread but I've looked and haven't found--where the heck have you been driving? That's like 100 miles a day 7 days a week. Okay, alternate Sundays off but still a lot of driving!

I do most of my driving in the area between Greenwood, SC and Asheville, NC.

[RobertSmalls]

You were able to hold lean burn up to 91+mph? What RPM is that?

The Insight, in stock form and cool ambient air, struggles to hold lean burn at 68mph. VTEC kicks in around 73mph, which pretty much kills all hope of lean burn. It's clear the Insight was not designed for great fuel economy at >70mph.

If your 90mph lean burn was on flat ground, your engine can apparently make 20+HP in lean burn, whereas mine can't do more than 15HP.

Btw, AerocivicLB should join Team Honda.

[basjoos]

At 91mph, rpm was about 2600 to 2700 rpm and 5.0 usec injector pulsewidth on flat ground. On my engine, VTEC kicks in at 2500 rpm, but this has no effect on lean burn, which is maintained up to injector pulsewidths of 6.1 usec at temps of 80F and up to 6.4 usec at 25F. I suspect lean burn will be maintained at speeds up to close to 100mph