Anybody here ever build a 100 HP/100 Ft of torque from an 80 c.i Evo? If so, what combination of heads, carb, cam, ignition, compression and reliability? Thanks in advance..

 

My S&S 107 can do that, with a little to spare. It will be interesting to see if anyone can match your numbers!

 

The Nightrider web site has a chart with several builds

http://www.nightrider.com/biketech/hplist_evo80.htm


When I had the top end done on my 80" they told me 85 hp was a good build that would still be reliable.

 

I got close to 100hp & over 100 ft lbs with 1 of my 80" engines. 96 - 99hp & 101 - 103 ft lbs depending on the day. 3 tries at hitting 100 hp with no luck.

The combo: Stock low mileage bottom end, Screamin' Eagle heads & intake massaged by CycleRama, Wood Performance W6H cam, Wood reworked CV, 10.5 to 1 SE pistons, SE Ignition, Roller rockers, SE lifters & pushrods & a ThunderHeader. Great running reliable combo. but not much fun when the compression ratio got to 11 to 1.

The same basic combo with Stock unported Screamin' Eagle heads, Stock pistons, liveable 9.5 to 1 compression has made 90 hp & 95 ft lbs on a few bikes for me over the years. These days when more power than this is needed i just go with a larger engine.

 

I had Cycle Rama do the head work on my 80".

 

87/92 on my Kendall Johnson 80" bagger and it gets 45mpg as well.

Check this site - it's full of build combos, engine components with the dyno numbers.

http://www.woodcarbs.com/dynoruns.htm

 

I came close, 98.6/95.3. 85" Revolution Performance kit with ported SE heads corrected to 10.5 to 1. V-Thunder EVL 5015 cam with a Dyna 2K ignition system. TP roller rockers, S&S Super E and so forth. This was done with Samson F-109 staggered duals. I can't find a 2 into 1 that will fit with mid controls on my 93 FXLR, otherwise she would be there.

Just killed my friends 2009 SE 110" fatbob equipped with a race tuner and V&H stainless 2 into 1. Needles to say, he's not too happy. Since then, I've installed a VT 5010 cam. Same lift just cut back on the duration. It's much smoother on the strret and comes in 500 rpm sooner. Trying this weeekend to get the jetting just right.

 

VERY good #`s guys!! we`ve done a million 85- low 90`s,did get 116hp years ago out of a 80",(14.0-1,.760 walters cam,STD heads,S&S lower end with titaninuim rods)for a guy with a AMRA modified bike,won alot of races but wasnt very street freindly

 

Thanks for the input. We managed to squeeze out 85/90 by porting the ports and a little shaving to achieve 9:7:1 with stock pistons, Headquarters cam, massaging the stock carb and manifold, Python 2 into one exhaust, screamin Eagle ignition. Runs pretty strong, I may consider a Mikuni carb, but I understand there would not be any major improvement over the CV.

 

Exactly, you can get 100+ HP but it takes at least two of the following three--very good heads, cams, and 13.5+ to 1 compression and are not very "street friendly".