Scat 4” cast crank?

[NC Engine Builder]

Block deck - 5.599
Piston cc ( -20cc )
Chamber volume 66 cc
Rod length - 6.123
Stroke - 4”
Bore - 4.03
Piston comp height- 1.465
Gasket - .040

Ok, you have the dished pistons if they are 20cc, you might be ok

 

[RustyRatRod]

Maybe, this is running magnum heads from what I can tell, the closed chamber and quench will help a lot.

I'm running close to 200psi on 93 pump gas without any signs of detonation, on a similar setup. Zero decked at 5.573, -13cc, 65cc heads. Running an 0.40 cosmetic.

Where are yall comin up with these stupid short deck heights?

 

[mbaird]

Where are yall comin up with these stupid short deck heights?

Magnum blocks . Shorter than LAs

 

[RustyRatRod]

Magnum blocks . Shorter than LAs

They are NOT 5"

 

[mbaird]

Oh … 5.573 ? Not sure on that one .

 

[mbaird]

9.599…. My bad . Must have fatfingered that one .

 

[mbaird]

I think you need to recheck that deck height.

Fixed

 

[TurboGLH]

Where are yall comin up with these stupid short deck heights?

Pretty obviously a typo, although it's pretty funny that we both fat fingered 5 in place of 9.

Other option is the deck is somewhere is now somewhere half way down the bore.

 

[mbaird]

Pretty obviously a typo, although it's pretty funny that we both fat fingered 5 in place of 9.

Other option is the deck is somewhere is now somewhere half way down the bore.

We could always run diesel !

 

[NC Engine Builder]

You can not figure your compression ratio off of a deck height listed in manuals. It must be MEASURED, or the crank/rod/piston put into the block and measured that way. Otherwise, your guessing

 

[mbaird]

Played pond hockey this morning, worked a few hours then came home and stripped the engine down . Just in time to watch USA vs Canada .

 

[autoxcuda]

Personally 93 octane is a pain to find here.

I'd want to be in the 9.5:1 to 9.8:1 range SCR.

 

[mbaird]

Personally 93 octane is a pain to find here.

I'd want to be in the 9.5:1 to 9.8:1 range SCR.

Im at 3000’ any traveling will be higher than that … upto 8000’

 

[Illahe]

There was a problem with one of the cast steel cranks breaking. A lot. I don't remember if it was the Scat or the Eagle. It was one or the other.

Eagle cast crank has had a lot of ill reports.

 

[mygasser]

Eagle cast crank has had a lot of ill reports.

agreed and not just mopar's, their small block ford one's would break too.
neil.

 

[Ironmike]

There is nothing wrong with a cast scat crank for what your doing and much more .

I agree. I ran a cast Scat at 565HP, pounded the snot out of it, and the dude who bought that shortblock is still running it years later. I went forged steel cause I was heading for 600.
Never heard of a Scat crank breaking although I'm sure it's happened. Eagle on the other hand are trash. Period.