rejetting tips

Reply Subscribe

Thread Tools

Search this Thread

May 10, 2014 | 09:20 PM

#21

Schex

Club Member

Joined: Apr 2011

Posts: 5,800

Likes: 7,828

From: SE Louisiana

Also keep in mind that the stoichiometric air/fuel ratio of E10 gasoline mix is 14.13,
and E15 is 13.8.

I'd be willing to bet that much of the E10 rated fuel has more than 10% ethanol.

May 10, 2014 | 09:31 PM

#22

1997bagger

Seasoned HDF Member

Joined: Aug 2008

Posts: 5,078

Likes: 2,150

From: Ohio

2000I is good in both Dyna and Ultima, there are some running threads on here on reading timing with your spark plug. Attaching a pic of my plugs with 13.8 cruise and 13.2, notice the color change on the strap it should be in the bend, this tune is 10.1 compression and on the edge of detonation with timing

Last edited by 1997bagger; Jan 26, 2019 at 11:58 PM.

May 10, 2014 | 09:41 PM

#23

1997bagger

Seasoned HDF Member

Joined: Aug 2008

Posts: 5,078

Likes: 2,150

From: Ohio

Quote:

Originally Posted by Schex3x

Also keep in mind that the stoichiometric air/fuel ratio of E10 gasoline mix is 14.13,
and E15 is 13.8.

I'd be willing to bet that much of the E10 rated fuel has more than 10% ethanol.

Just noticed on tuning my big engine that the plugs didn't color very well and AFR's were on the rich side, actually pulled the O2 sensor back out to recalibrate it to open air and reinstalled. Made some slight adjustments to got the AFR's close with the S&S/Ultima carb, ran a tank of fuel out and checked the plugs with just a off white color so maybe some higher ratio ethanol fuel already messing with us, the pics of the plug in the last post are last years in the 89"