WHATS THE BIGGEST CI. WITH SCJ HEADS

THAT ANY OF YOU HAVE DONE? AND WHAT COMPRESSION?

BOSS 429 wrote:THAT ANY OF YOU HAVE DONE? AND WHAT COMPRESSION?

If you consider P-51's SCJ's then I have a 580 inch engine running them @ 1003 hp.

how big was Sherry's deal?

richter69 wrote:how big was Sherry's deal?

572

what about Blue thunder's SCJ head?

600cui, 12-71 Hampton Blower,

IDT-572 wrote:

BOSS 429 wrote:THAT ANY OF YOU HAVE DONE? AND WHAT COMPRESSION?

If you consider P-51's SCJ's then I have a 580 inch engine running them @ 1003 hp.

nope, just want to hear about scj's alum head

blown86hallet wrote:what about Blue thunder's SCJ head?

600cui, 12-71 Hampton Blower,

thats a good head, but Im just talkin about the scj alum head

BOSS 429 wrote:

blown86hallet wrote:what about Blue thunder's SCJ head?

600cui, 12-71 Hampton Blower,

thats a good head, but Im just talkin about the scj alum head

I guess Boo Boo's 572 and 880 hp then is as big as I have seen.

A guy from AZ. [I think] that use to hang out on the other forum several years ago had a 598" SCJ in a full size Bronco.

Is the question your looking to answer at what CI does the SCJ becone a limiting factor to the combo? I would like to knowth answer to that one only I have 1st gen CJ's I know it depends on the flow #'s on any given head but a ball park for a set of racepreped heads would be what I would be interested in.

Lem Evans wrote:A guy from AZ. [I think] that use to hang out on the other forum several years ago had a 598" SCJ in a full size Bronco.

Was the the guys name Danny?

That be it.

;;;;;;;;;;;

Kaase mentioned that a 598 deal would be good for the P51s...

jbozzelle wrote:Kaase mentioned that a 598 deal would be good for the P51s...

Boss said P-51's wasn't what he was interested in. But I agree with Kasse. (IF THEY ARE PORTED)

IDT-572 wrote:

richter69 wrote:how big was Sherry's deal?

572

Our 572 was built by Lawes Mayfield and he did the work on our SCJs. They flowed about as good as a set of P-51s out of the box. Motor made 884 HP (using green oil of course).

My 2 cents worth would be 572 is the upper limit for those heads, maybe a little bigger with a set of Blake's
P-51s.

Bigger than 572 and you need some A-heads

Bruce

While the A460s are i.m.o. the bang for the buck but, no one should sell the SCJs short. If Bruce's 572" SCJ engine had the same carb, headers and vacuum pump that Blake's 580" P51 engine had it'd be solid over 900 hp.

Lem Evans wrote:While the A460s are i.m.o. the bang for the buck but, no one should sell the SCJs short. If Bruce's 572" SCJ engine had the same carb, headers and vacuum pump that Blake's 580" P51 engine had it'd be solid over 900 hp.

I concur wholeheartedly.......................

jasonf wrote:

Lem Evans wrote:A guy from AZ. [I think] that use to hang out on the other forum several years ago had a 598" SCJ in a full size Bronco.

Was the the guys name Danny?

Nope, his name was Pat. Here's the specs on his engine from his web page and one of the last photos he posted there.

Siamese bore 4 bolt main A-460 Big Block Ford 598 C.I. 4.600 Bore X 4.500 Stroke Bryant 4340 forged crank, 6.8 Crower 4340 steel billet rods ARP main studs, Fully race prepared Super Cobra Jet heads by Jon Kaase Racing http://www.jonkaaseracingengines.com/ Comp Cams Custom cam grind by Jon Kaase, Mechanical Roller .761lift Dur. 280/300 @.050, Crower Hippo lifters roller rockers Manley Nex Tech Valve springs Custom Forged JE Gas ported pistons 14.9 compression, Ported Victor Jr. intake, Pro Systems 1250 Holly Dominator with dual regulators and Barry Grant 400 GPH fuel pump, MSD Digital 7 programmable # 75301, MSD #8261 coil, MSD Pro billet distributor, MSD Crank Trigger, Custom 3 step headers ,Jon Kaase oil pump, Moroso Pro Eliminator oil pan, Moroso Electric water pump, light weight aluminum radiator , Auto Meter Dual Channel (engine and drive shaft) recording tach low tension piston rings and an Aerospace Components vacuum pump
Drivetrain: Hughes Performance C-6 with wide ratio gear kit 2.72 first 1.54 second, transbrake, 9 inch 5000 stall converter, Chrome Moly 4 linked Ford 9 inch with Strange Pro Iron case Strange 4.71 35 spline Pro gears Mark Williams 40 Spline axels and spool, Weld Draglite Wheels and Hoosier 32.5X 14.00 slicks
Notes: Best ET 10.64 and 127 MPH 5000 LBS with driver Best 60' 1.441 All motor no nos

Can the SCJs be ported to flow as good as a set of ported P51s? Or is ther enot enough port wall available to do it?

I have seen a 572 deal in the summit catalog a year or so ago in a 68 mustang. Seems on the spray it was doing 8.40's and I think low 9's on motor. I had the calander with all the specs because I was doing my 521 SCJ motor, but I have no idea where it is at. Mabe someone else has seen it too. It mad crazy power.

jbozzelle wrote:Can the SCJs be ported to flow as good as a set of ported P51s? Or is ther enot enough port wall available to do it?

Not enough wall from what I have read.

im might just do this 4.6 x 4.6 deal more compression and a bigger cam ---- Lem this could be a fun project

jbozzelle wrote:Can the SCJs be ported to flow as good as a set of ported P51s? Or is ther enot enough port wall available to do it?

more to it than just flow lol.

jbozzelle wrote:Can the SCJs be ported to flow as good as a set of ported P51s? Or is ther enot enough port wall available to do it?

The port within a P-51 head IS an "out of the box" version of a ported SCJ. The ports of an SCJ cannot be made as large as those in a "ported" P-51 without a bunch of welding. Simply because the ports in a head are larger and flow more air, doesn't make it a BETTER head ... the better head would be determined by the application.

The combustion chamber shape and intake rocker stud angles have also been changed on a P-51 head.