View Single Post
Old 10-11-2013, 07:17 PM   #18 (permalink)
Occasionally6
Master EcoModder
 
Join Date: Apr 2013
Location: World
Posts: 385
Thanks: 82
Thanked 82 Times in 67 Posts
Quote:
Originally Posted by Sam Powell View Post
I plan an extended cruise soon with a friend to play with the timing. The strategy, when a dyno is not available, is to advance timing until the detonation gauge begins to light up, and then back off a degree or so. With a dyno you look for max HP, but sadly I do not have one. All the ones around here are not steady state dynos, which is what is required to set timing for cruise. Read above post for description of tuning capabilities of Mega Squirt.

Thanks as always for advice and ideas.

Sam
Particularly with low CR you may not be knock limited in terms of the best ignition timing. That's something that is very difficult to determine on the road.

As lean as possible doesn't always produce the most efficient operation. Leaner does reduce the pumping loss but too lean and not all the fuel gets burned.
  Reply With Quote