427 stroker help/advice

misfit41 · #1 (**permalink**) 10-22-2003, 08:00 AM

I just picked up a c4ae center oiler,the block looks great at .030 over,had a c5aec crank and new lemans rods,I am thinking this may be my best chance to build the stroker I want,since I am in it right.
I have a 428cj crank,but now am debating selling it and buying a scat with the 4.25 stroke,given the cost of turning the crank I have I should come out close.
Any advice on which way to go ? also on rods and pistons,it would be great to use some off the shelf parts,is this possible ?
I intend to build a pump gas street engine,doing assembly my self and trying to keep it as economical as possible.
I appreciate all your help,,,Tk

shaps · #2 (**permalink**) 10-22-2003, 09:06 AM

TK,
thinking about something similar. My understanding is the Scat Crank uses Chevy BB Rods (6.70").

Think the 4.25 crank gets you something live 484 CI.

Am very curious to hear what others have to say.

Shaps

RedCSX · #3 (**permalink**) 10-22-2003, 09:56 AM

Give Doug Garifo of Precision Oil Pumps a call, Has built many FE's and is a Scat Dealer. He can advise you as well as any one.
We are building a Center Oiler for my new Cobra right now.
(559) 645-1951. Tell his Morgan told you to give him a call

shaps · #4 (**permalink**) 10-22-2003, 11:53 AM

Many Thanks.
Please, Keep em coming!

machineman · #5 (**permalink**) 10-22-2003, 05:36 PM

The scat 4.250 crank has BBC rod journals. I would also go with H-beam rods & forged pistoids. Just built one w/hyd. roller that made 525HP. on dyno. Good motor call ERIC AT 513-738-5001

RICK LAKE · #6 (**permalink**) 10-22-2003, 06:40 PM

machineman Eric, what size cam is in this motor and who's heads are you using? The numbers are nice but what was the torque numbers and was it a flat power band??? Rick Lake

machineman · #7 (**permalink**) 10-22-2003, 10:03 PM

Yes had very flat power band from 3000 to 6000 w/.650 lift cam & over 500ftlbs torque eldebrock heads & factory FE alum. manifold.

misfit41 · #8 (**permalink**) 10-23-2003, 07:57 AM

Hi al and thanks for the help on this,,
525 HP dosent seem like a lot to me ,,what kind of heads/intake and compression are you using ?thanks,Tim

rritchey · #9 (**permalink**) 10-24-2003, 11:13 AM

MISFIT41 AND SHAPS,

YOU CAN EASILY GET WAY MORE POWER THAN YOU WILL EVER NEED FOR THE STREET OUT OF THE CENTER OILER AND CJ CRANK COMBO. I HAVE BUILT MANY OF THEM, ALL OF THEM IN THE 550 TO 625 HP RANGE. YOU CAN GET 550 HP OUT OF A VERY STREETABLE 454 FE. THE SCAT CRANKS REQUIRE AFTERMARKET RODS AND CUSTOM BUILT PISTONS BUT YOU CAN RUN FACTORY RODS (390 RODS WITH ARP BOLTS ARE SUPRISINGLY STRONG) AND SHELF PISTONS FROM JE OR ARIAS. ARIAS IS THE CHEAPEST PISTON I HAVE FOUND FOR THE 427 / CJ CRANK COMBO. THEY STOCK THEM IN 4.25" (.017" OVER) AND .030" OVER AND .047" OVER. THE RINGS ARE CHEAPER IF YOU GO WITH .017" OVER OR .047" OVER. ACTUALLY, WITH THE 4.25" CRANK, YOUR OIL RINGS ARE IN THE PIN BORE AND YOU LOOSE OIL CONTROL - NOT GOOD FOR THE STREET. YOU WILL HAVE ALOT LESS MONEY IN ONE THAT USES A CJ CRANK, AND UNLESS YOU ARE BUILDING A COMPETITION RACE MOTOR YOU REALLY WON'T BE ABLE TO TELL THE DIFFERENCE. JUST FOR REFERENCE, MOST OF MINE HAVE 1U CRANKS AND LEMANS RODS, ARIAS OR JE PISTONS, AND MAKE MID 500 HP AND WE HAVE NO PROBLEMS WITH THEM UP TO 6500 RPM.

misfit41 · #10 (**permalink**) 10-24-2003, 11:48 AM

thanks for that rritchey,,I think I am leaning that way since i already have an IU crank and lemans rods,I can use the extra dough toward heads,, Tk



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