Engine upgrade

[bajaman52]

This is a great forum and I really appreciate all the feedback from members. There is a lot of great wrenches that post here. I want to upgrade my 86 FXRS. The heads have been shaved and I am running I believe an Andrews EV3, the rest is stock. My question is, being the cases are rough cast and not well fitted, I was thinking about buying a pair of S&S or Delkron polished cases and putting on a pair of S&S heads and cylinders. Those cases look so much nicer and have a much better fit. I have seen a lot of 3 5/8 S&S heads for sale at decent prices. I could also just polish up my cases, but I am not sure how strong they are. I want at least 90 cubes, but maybe I can get 90HP without boring the cases and going with a set of S&S heads. I want it ridable around town and durable as I ride cross country a lot. What do you fellas suggest. thanks to you guys out there I am getting a lot more knowledgeable about my bike.
Thanks

[hardluk1]

If the drivetran is stock it willn't take to much hp increase with out problems. Keep hp where its at and ride 100s of thousands of miles. Polished motors are pretty but need upkeep or will look like poop after a couple years . You have a ggreat motor in the early models. What carb,exhaust,airkit.and ignition are you running now. I good dyno run to see how your bike preforms and with a air/fuel mix check , one W.O.T. pass and under load as if street rideing threw the gears will till alot. I just come off a 115hp bike and have now a fxr stock with cycle shacksexhaust, mikuni42 and big air kit (had those on the shielf), ev23 cam and a single fire tunable ignition and am ticklied. 71 to 72 hp.You can get about 82 to 85 hp fairly relieably. To get more bore you have to bore the cases. With got to have more power by a 100ultima,cheaper than any at a little over 3000 from Jerih. Take look at nightrider ,he has some good dyno pages that give a idea of what it takes to get hp and go cycleramma's site and see the evo dyno run. Remember you will need to do tranny and clutch changes ,maybe primary too to get the parts that can handle show'n off that hp you want.

[bajaman52]

Thanks hadrluk1. Like I said I got a stock motor except the heads have been milled slightly and the heads have been ported and polished with an ev3 (I think). the engine was done by the first owner. I added a S&S super e, hi-4 ignition and a 2 into 1 supertrapp. I had it dynoed and it put out 65 hp. The mechanic that did the dyno said it ran pretty strong for a basically stocker FXR. I have never had it apart, so I don't know how much the heads were shaved. The pistons are stock but I do not know what the compression is. I do know that I have had the bike for 14 years, rode the heck out of it and never had any problems. About 6 years ago I had the top end done because the rings gave out, went 10 over. But they did not tell me anything else. I should have asked. Anyway I was thinking that I might need to do the bottom end soon just to be safe because I ride cros country through some pretty remote places and don't want to be stuck. But it sounds like the lower end is maybe good yet for many more trips. Thats why I posted. I don't know much about the older evo motors and how they hold up. What would it take to bump it up to 85 hp. A lot of people post about the Woods 6 cam. Maybe that and a set of S&S heads with that raised port. That way I would not have to bore the cases. It also seems cheaper to buy a built motor than to build mine out.

[hardluk1]

I am very suprised with only 65hp I have done that years ago with a stock bagger with only Khrome Werks slipon's and airkit with carb rejetted. It does make you wonder?? Do you have a independent motor shop in your area to talk to?? I have thought about doing some up grades when i bought mine to and finally made up my mind that i will by a ultima 100" motor and leave my old motor be,(serial numbers match) except for the small ev23 cam. Worth more to have it with the bike down the road and just drop in a new motor for very close to what a bored and or stroke motor would cost. If you have a ev3 it should be well over what you have but you do have a well run motor.Should be around 72 hp with a strong top end and you do have the best exhaust if tuned well. If you change exhaust ,let me know. Try to contact A.M.S if i have there name right its Automotive Machine Systems They are on your half of the country and build harley kits . They can be found on some Delphi harley sites and have a happy following at a very good cost. To many of these motor shops on these sites want to max out a motor and it is no good for every day high milage use. Ams seems to be a good one. Also Kendall Johnson customs. Had some evo head and cyclinder kits on there ebay web site at a good price. I had one of his 95" kits in my last bike. Talk to S&S about the kit you would like and they will tell you what to exspect out of it. Don't know about the woods6 cam for a evo's but there tc cams do work well but with some high lift ,well over .600 and for a long running street motor i ain't gona run that kind of lift. Higher spring pressures,stiffer springs just more wear and tear. And a woods 6 cam will not get close to 90 hp on a small evo. Call woods and s&s and talk to them about what you want but give AMS a call to . They will not be near a phone ,i think all work there. Remember that tranny. Atleast a rivera or bernett clutch assembly. And no burnouts .HAHA. OH ,I changed my rear pully to a 65 tooth about 5 months ago and so far a couple others have done it to with no problems. Still had a bit of ajustment left. That sure made a big difference , Lets the TQ in the motor work and made a much better highway bike . Only down side is for parade speed rideing. I used a 91 softtail pulley ,65tooth off ebay for 26 bucks to my door. Now 60mph is 2650rpm. There has been many evos run well over a 100,000 miles on these different sites. so good motors. If your venting your case vent seperately does it ever blow any oil residue ,Mine has not ,better than any late model evo or tc. Check out Jerih web site or magazines for harleys for there sale pages.

[make72]

What is hp results (approximately) for evo, stock bore 10.5 comp pistons, Mikuni 42, Andrew's EV46 cam and good breathing pipes?

[KingofCubes]

With the stage 2 cnc porting to the stock heads we see 90 torque at 2,500 rpm, 95 ft. lbs. @4,000 with 85 horse @ 4,700 rpm (still 80"). With the stage 4 weld and cnc port we see 90 t&h but much quicker revving. We use RR56 or 565VP cams and Wisco pop ups in these, they are fun! We can do better yet with the S&S but they require more welding.

[bajaman52]

What is stage 4 weld?
Thanks

[hardluk1]

Did you get the pm and pics??