HarleyTechTalk

Quote from: Hillsidecyclecom on December 24, 2011, 11:16:42 AM

Quote from: 1FSTRK on December 24, 2011, 07:52:16 AM
I have seen the box stock crate 124 make 140-150 hp with an S&S man,S&S carb w/thunder jet, and good flowing stepped head pipes. If I remember correctly it made about 142 with the 48 Mik and wood large air filter. The heads should not hold you up.

Don't feed folk's that bull"Potty mouth" about 150 hp from a crate 124"ers.
THEY DON'T.

Thats for sure Scott-150 HP crate 124"'s my azz...
Out of the box w/ a G, depending on the pipe, intake, tune and dyno-125-132 HP.
I initally ran a superstock head set up from a crate 124" with a rocker swap (1.7's), .2 bump in compression, D carb and velocity stack, and Sam Wills Racing Innovations dual stepped pipes and here was the result in 2002-It made 142 HP at a tuning session, and at a shootout a couple weeks later here was the result (putting a couple big name builders on the trailer as well)...

2002 LA Calendar Bike Show's White Brothers West Coast Dyno Horsepower Shootout Winners:
V-Twin 88 ci & Over-

Paul Morris, 1990 Harley FXR, 137.5 HP

I have no idea of the abilities of your mechanic or tuner and frankly that has nothing to do with it.
No one selling anything in my posts and just stated what I saw, some folks got offended, I backed it up with as much info as I could and you can take it or leave it. It's an open forum.

No doubt top head guys who massage the superstocks and bump compression along with it and other mods have taken a crate 124" and bring it well into the upper 140's square and perhaps beyond but thats a million miles from a "crate" motor.
The S&S site itself advertises less than 130 HP from their 124" crate motors and back when Rob Schof from Hal's won the Hotbike S&S ultimate challenge (several top builders using crate 124"'s with the S&S tuned induction dual runners-no internal mods allowed) he managed just over 140 HP, with Kendall, Wink and others in the 130's HP. This was with the best in the world trying to squeeze power from these crate motors.
The big, big power just isn't there from these superstocks out of the box. Period.

With the right work, those buggers will flow some mighty good numbers, on both sides of the head.
Combined with the right amount of squeeze on the .640, intake system, and exhaust, they can really rip.
Scott