96" shovelhead: yay or nay?!
 

Looking for a project bike FXR shovelhead to build for my brother...
Has to be almost bulletproof... or at least dependable as a shovel can be
I have an '83 FXRT that I love and requires just basic shovelhead maitenance

Found this FXR shovelhead with a 96" motor, original cases so amtching numbers (which the project requires)

These are the specs:

96 cubic inch hot street or drag race shovel head motor

4 5/8 stroke x 3 5/8 bore
Heads by Hamp, three bolt exhaust flanges, 2.090in Intake valves and 1.700in exhaust valves
Dual spark plugs, Vinton valve seals and sportster springs, Jims roller rockers
External oil returns (from heads to lower end)
Keith Black Pistons
H beam rods w/ S&S crank pin and nuts
Truett & Osborne flywheels4, 5/8 stroke, stock dia.
Accell sprocket shaft
OEM pinion shaft
Jims lifters and stools
Rivera taper lite push rods
Comp cam #4050
Mikuni 45 chrome carburetor W/air cleaner
Crane HI 4 ignition
Dual dyna coils
Hand built 2 into 1 drag style exhaust w/ removable baffle
Spyke high torque starter
Extra crank and rods, 4,3/4 stoke W/ pork chop fly wheels 7lbs removed S&S
Extra 3,5/8 bore pistons, S&S .020 over
Extra S&S super D carb W/ 2 Thunder Jets, W/Velocity stack and air cleaner
Extra Andrews M grind cam
5 speed trans all Andrews gears and shafts
Extra stock 5 speed gears and shafts
Rivera Pro clutch
32 amp charging system
Extra primary cover


4K miles since rebuild, parked for 1 year... good price
yay or nay?

I know it depends a lot on WHo and HOW builds the engine, so hard to tell...

they dont last long with compression -- i use 7 to 1 for lomg term use

and they are pricy to fix

its a great 3rd bike for those days when nothing went right and it still runs -- jz

No way in hell will it be as dependable as an 83 FXRT, ( I had one too way back when.) And he put lots of money into it obviously.

But that 96" built motor is gonna' start reliably with just the Spyke electric starter?

That doesn't sound right to me. How much of a "good" price?

better idea since you have to bore the cases is to go that extra mile -- the 3 13/16 cylinders require more work to install,but with a shorter stroke it will live ALOT longer..

cams for engines like this i would use a sifton 468+ low lift long duration -- you can get it now a days with this #106 Intake: 30/60 270 0.445 Exhaust: 60/30 270 0.445 Overlap: 60 --

also if ya got the $$$$$$$$$$$$ the very best is a mike sorenson engine -- you wont need a big engine to make more power than 2 96" a 93" sorenson engine will make HP #'s x 3 100+ hp

check here to see what he does -- its in the heads that counts --- http://www.bikernet.com/pages/Shovel..._Not_Dead.aspx -- mike can supply you with everything from heads -- fully assembled -- roller rockers -- lifter blocks -- if its a beast ya want and ya want it to live this is it... and all on pump gas --

"OLD POST ABOUT THE "M" CAM

"dozerman
11-15-2008, 05:21 PM
Anyone ever run an Andrews M grind?? Was it any good?:confused:
DEW
11-15-2008, 06:36 PM
Ran it in my 96" shovel for a few years with 10.0-1 comp. Came on like a raped ape from 3000rpm and up. I was running tripple valve springs and kept breaking the most inner one. Now running the 6 grind with 10.5-1 comp, comes on sooner and easier on valve springs.
10-2740 1948-69 28/56 264 .590 .210 Street Drags: 88+ in. motors maximum mid-range torque cam 3000/6500 RPM.
10-2750 1970-77 M OK for low compression on street. Andrews triple springs required and Andrews valve collar tool required.


"the "M" is a .590 lift cam needs triple springs -- oh it pulls like a raped ape but the wear on the valves and guides -- i ran this cam its really for up to 88" engines -- its gonna really pull hard in a 96" and run out of power really,really fast - as i found out -- ALLLLLL andrews cams are high lift constant velocity manifold vacumme cams and run out of power in the top end --- i run leinweber cams myself -- that 4 5/8" stroke is a bar hopper -- and that set up is short time use .. the 93" 4.500 stroke is a better choice -- use either a sifton 468S or a leinweber J-4

the link you wanna see --- http://shovelhead.us/forum/showthread.php?t=119960 ---

96" shovel is gonna take a lot of care and feeding and it's about a 50,000 or less mile motor with stock cases . Metal fatigue gets to them when you go that big . 88" shovel is just like stock for care & miles , an 8.5-1 compression 93" with a civil cam needs a bit more love to keep up and won't last as long but still give you years of reliable riding . The hipo 93" and bigger engines are really for guys who know how to deal with things like tuning and doing all the care theses beasts will need and they can be a hard on the rest of the bike like starting systems and trannies cause if you have that kinda power you will play with it .


I will say whoever did the beast used the right hardware combo , they knew what they where doing so there's a good chance thats a solid motor . Only down side is that3 bolt exhaust nobody makes pipes for them you have to build your own have somebody do it .

Any hipo motor requires attention.Nothing beats stroke and compression.Use the right springs with the cam you choose.That`s the biggest issue,cam and springs need to be matched.Lieneweber has one of the best springs out there for lumpy shovel cams.With the big cubes you really don`t need to wind them out imo.It`s only as strong as the weakest link.

That's a lot of stuff for stock cases. Why didn't they spring the extra bucks for the better cases? Personally, I'd stay away from it. I had a pile of stock cases with spun bearings, gaping holes from rods and pulled cylinder studs. Went to Delkrons (back in the day) and the busted cases stopped. That was on 96 to 114 motors. Built a 80" hi compression motor and had all of the fun in the world with it, with reliability. Had a damn good builder too.
Why was it parked for a year?