From: cheezie@ezl.com
Date: Sun, 24 Mar 1996 16:32:48 -0600
Subject: HDI, Stock, and SE ignition curves...Tusk asks:
> Talkin with the head mechanic (Mike) about my little hesitation
> problem he convinces me the Screamin Eagle module has a more aggressive
> advance curve (1340F) than the stock 96 (1340P).Those two boxes do have different curves....the "P" curve HDI box is new to all 1996 1340 domestic models and it is different than the "F" SE curve box. The "F" SE 8K rev-limit curve is the same curve as the 1995 and earlier 1340 domestic stock type 5200 rev-limit "D" curve box. Both the "F" and "D" curve boxes have a more aggressive curve than the "P" curve box. All domestic bikes for 1996 have the new HDI box in them (with different curves for different models) and it is supposed to be the hot set-up (according to HD) for all pre-1995 bikes...don't understand why he wanted to change it...I'd have left that "P" box in it and maybe done something else such as carb work.
Couple of things to note for this "P" curve box is that they are now timed AT IDLE using a different timing mark that is located 20 degrees BTDC....so this means that all bikes previous to 1995 (because most of the 1995 models already have this 20 degree timing mark) will have to have a mark put on the flywheel IF a "P" curve box is used.
> So I put on the module and we hit the road. The bike sure SEEMS to run a
> little better, with the hesitation gone. Can anyone tell me for a fact
> that this is not all in my head? Cheezie?It would run different for sure...not a figment of your imagination. ;-)
Happy Motoring from cheezie@ezl.com