Hello everyone! My first post so hopefully I put it in the correct spot and a thank you ahead to all who read this and chime in. Long story short is I own a 99 evo softail that was dyno tuned at RC Cycles by bob that put out 89 up/91 ftlbs. Engines goodies are as follows compufire dual-fire adjustable ignition, mikuni HSR 42 (165 main) clip in 3rd groove from top, Woods W6 cam, S.E. Adjustable pushrods, S&S lifters and reed breather valve, big sucker cleaner, and tuned thunderheader. Now my question, I'm wondering if I should take these STOCK heads off and deck them for 10.1 comp or just leave them alone. I feel I'm pretty lucky with these numbers with stock heads. What do you guys think? I have a lovely rear jug leak so something has to be done about that. Any input greatly appriciated!

 

WoW.. I have everything you have on my evo, and e-brock heads and intake and matching pistons
I only am at 80hp. I need a better tuner. 10.5 - 1 comp

 

Rmuller, yeah I know right? Shocked the crapp outta me! I raced a modified fxr with a 140 lb guy on there(I am 180) on a pretty stripped nighttrain and held my own. The biggest hp gain during tuning was a decrease in timing. It was way advanced. Still didn't ping but it was advanced to far. The thing runs so hard it amazes me. That's why I wonder if I should bump compression or not?

 

If it's running that well, leave it alone. Do the compression when you have to go in there for something years down the line. What are you going to gain? 5 HP? At what price?

 

I have a dyna 2000 ign on mine. need to change it for something else. heard it doesn't work on the 97 evos. not sure

 

Talk to a couple shops. :et them know what you have, how you ride, and where you'd like to go with your bike (bar hopper, shorter rides, cross country touring, maintain reliability or all out drag...). A good shop would recommend a compression to stay below and what way to get there (shave heads, port, bore, etc.). I'd say if you have a good enough reason to go in there, and your thinking you'd like to do something, that it's the perfect time to do something. I'd hate to do all that work for a silly gasket.

I had a street port, some sort of radius valve job and new springs put in a few years back for $625 (I brought in the heads). Add shaving the heads .060" for maybe another $125 along with a similar setup to you and I can outrun "stage 1" 96" boys with my little 80".

 

Bob has a passion for tuning so kick in a couple of pony's for his knowledge, with the bike running that good, I would keep putting gas thru it and keep an eye out for a bargain set of stock heads with no cracks in the spark plug hole to valve area, save up some jingle, have them reworked and set back for that gasket replacement day.

 

Maybe I am reading this wrong but you are saying it makes those numbers with stock pistons and heads right? http://www.nightrider.com/biketech/hplist_evo80.htm This website is kind of the holly grail of harley tuning and you can see nothing stock even comes close to those numbers so I would say that motor maybe has more done to it than you think. Mine has similiar bolt ons with 10.5 to 1 and a 2500 dollar head job by SAMS Performance in SC and depending on the tune it makes in the 90's hp and tq.

 

Topfuel 7
I think she is stock unless somebody got in there and did the heads/pistons. Thing is it ran o.k. When I first bought it. Put the w6 in and whammmo. New machine. Also had stock cam and pushrods in there. I have been to that site numerous times and I know what you mean about the info. Might just b a mystery motor. I'm not a B.Ser; just trying to figure this thing out.

 

Yea Topfuel, after reading more into it, would be tough to hit 90-90 with 8.5-1 and stock heads, would have to say impossible. It is tough hitting 90-90 with 80" without professonal help, I did see my head guy John Sachs on the Nightrider list at 109 hp with the 80" so that is why I mentioned professional help is needed and I wish you would take that picture of that Badboy off because all it does is **** me off because I don't own it!