rich carb

RJ Sledge · 09-08-2019, 08:51 AM

In my experience on a carb combo it showed rich when staging with 2 step at 3000 rpms or so. Moving O2 or extending collector will correct that.

On an efi combo putting an extension on allowed us to tune it so it did not search and go lean/rich while in 2 step staging. Like the computer couldn’t make up its mind up from due to O2 not getting clean data. That was with a BS3 system but believe it to be the same with all.

Believe Vic’s combo is 780 Holley but maybe not.

RJ

09-08-2019, 08:51 AM	#10
RJ Sledge Senior Member Join Date: Jun 2007 Posts: 783 Likes: 504 Liked 288 Times in 90 Posts	Re: rich carb In my experience on a carb combo it showed rich when staging with 2 step at 3000 rpms or so. Moving O2 or extending collector will correct that. On an efi combo putting an extension on allowed us to tune it so it did not search and go lean/rich while in 2 step staging. Like the computer couldn’t make up its mind up from due to O2 not getting clean data. That was with a BS3 system but believe it to be the same with all. Believe Vic’s combo is 780 Holley but maybe not. RJ