[Highboytim77]

Have a .60 over block, stock crank, going to purchase scj heads and kb flat top pistons, shooting for 500hp, can someone please point me in the right direction on my next step on what I need to figure out, where do I start cam? Rod length? Been searching for weeks but I can’t seem to find an answer that makes sense to me

 

[wickettoby1]

Step 1- Find a good machinist if you don’t already have one.
Step 2- The SCJ head and a flat top piston isn’t going to make for a pump gas friendly combination if that’s what you were shooting for.
Step 3- If you’re using a stock crank a stock length connecting rod (6.605”) is gonna be what your looking for, ideally an aftermarket I or H beam.

 

[Highboytim77]

Is there any way to make that head work then? My mind was set on having a 460 scj

 

[wickettoby1]

Yes you need a dished piston, assuming that the piston is close to zero deck.

You’re power goals are very realistic which is a plus.

 

[Highboytim77]

Ok, I do have dish pistons already, p1548 is the part #, going to buy some eagle connecting rods also

 

[wickettoby1]

If you have the Enginetech pistons they wont work with a SCJ cylinder head, the valve reliefs are in the wrong place. Also those look like a cast piston which doesn't really belong in a performance engine application.

 

[JimL]

460 Horsepower Chart (revised 1/24/09)

cc

www.460ford.com

Good info...

 

[Highboytim77]

Would a 521 scat stroker with scj heads be 93 octane friendly?

 

[Highboytim77]

Or occasionally running aviation fuel?

 

[wickettoby1]

521 stroker kits come in all flavors and compression ratios, some are pump fuel friendly some are not.

 

[Highboytim77]

I found one on speedway.com, didn’t see anything about compression or fuel, guess I should call them

 

[wickettoby1]

With a non altered SCJ head and a piston at zero deck you’ll need a dish in the low 30cc range to get you down into the mid 10’s:1 compression wise.
Please don’t take this the wrong way but it sounds like you are in way over you’re head here. Have you built (not assembled) any engines before?

 

[Highboytim77]

No I’ve never built and engine before, I’m confident I can do it though, I just don’t want to build a stock motor, I want to put together a hammer, I know I can check and measure clearances and all that stuff, just not sure what combo would work for my goals

 

[wickettoby1]

What is the engine going into?

 

[Highboytim77]

1977 f250

 

[Highboytim77]

4 10 gears and 4 spd

 

[wickettoby1]

Sounds like you’re gonna want an engine that makes a lot of torque down low with a broad torque range. With 4.10 gears and a non OD 4spd you don’t want an engine that wants high revs to make power.

 

[Pendelton]

If you have Enginetech pistons these won't work with an SCJ cylinder head, the valve drains are in the wrong place.