Slant Six Forum
https://slantsix.org/forum/

3.9 Fuel injection
https://slantsix.org/forum/viewtopic.php?t=38596		 Page 1 of 1
Author:  xjarhead [ Mon Jan 11, 2010 1:41 pm ]
Post subject:  3.9 Fuel injection
Has anyone used fuel injection from a Dodge 3.9 liter on a slant?
I did a search but did find much info.

Thanks Dave
Author:  Joshie225 [ Mon Jan 11, 2010 2:11 pm ]
Post subject: 
No. The 3.9 V6 is not even fire and it's speed density so it's a poor choice for retrofit.
Author:  xjarhead [ Mon Jan 11, 2010 4:55 pm ]
Post subject: 
What does even fire mean?

Thanks Dave
Author:  SlantSixDan [ Mon Jan 11, 2010 5:05 pm ]
Post subject: 
Quote:
What does even fire mean?
It means "Keep using a carburetor." :twisted:

Seriously, there's a decent explanation here, though for some strange reason it talks about only "early" V6 engines being 90° odd-fire types.
Author:  Joshie225 [ Mon Jan 11, 2010 6:03 pm ]
Post subject: 
Quote:
What does even fire mean?

Thanks Dave
Even fire means all the cylinders fire at equal intervals. With the slant and other even fire 4-stroke-cycle sixes it's every 120° of crankshaft rotation.

The crank pins on the 90° 3.9L V6 are only split 22° so there is a bank-to-bank timing difference of 8°. So #1 fires, then #6 fires 112° later, then #5 128° later, blah, blah, blah.

The 60° 3.8L V6 as used in mini vans is even fire. I still would not use much beyond the fuel delivery system and throttle body on a slant. With the low cost of Megasquirt electronics I wouldn't bother with anything as inflexible as a Chrysler ECU.
Author:  xjarhead [ Mon Jan 11, 2010 8:17 pm ]
Post subject: 
Thank you both for the info it was very helpful.

Dave
Page 1 of 1 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/