Eagle vs. Scat

[Driver50x]

I am looking for a rotating assembly for a low budget street stock. It is a 355 Chevy flat top. Does anyone have any good or bad experience with either Eagle or Scat? Or should I be looking for something else? I am thinking about going with forged pistons and maybe a cast crankshaft.

[dereksehi]

I prefer eagle over scat especially their cast steel crankshafts I feel eagle is a better product but some may have a different opinion. One thing I do like about scat is they offer their Procomp rod with 7/16 cap screws and a polished beam for extra insurance if your rules allow.

[jsf74]

how many rpm's you plan on turning?

[Driver50x]

Probably about 6800.

[jsf74]

I think either is fine for that many rpm. The key is a balanced assembly in my opinion.

[lovinlatemodels]

Scat.......

[RW57]

I have a friend who lost a new eagle rod after only a lap and half , A couple of builders within an hour of me would not use eagle at gunpoint both say the quality is not up to par also weights of parts are all over the place we are going scat with our new motor.

[let-r-eat]

Scat for me.

[Driver50x]

So do you guys think the Scat cast crankshaft would be good enough for this application?

[lovinlatemodels]

Scat Crank and Rods will be just fine for this we have turned Scat stuff cast material up to 7,500 RPM's with no failures.

[CNC BLOCKS]

I do a lot of balancing for a lot of shops in my area and the Scat seems like more of a quality crank then the Eagle, One guy bought 2 Eagle cranks for a 383 externally balanced and both cranks you could push the balancer on by hand, Told him to get a Scat problem solved.

Search issues with Eagle Sir rods and look at the pilot bearings issues they had a while back.

If you want a decent rod you might look at the Scat I beam with 7/16 bolts

[Driver50x]

Thanks guys!

[dereksehi]

Another to add to the eagle cast shaft is the .125 radius on the rod journal where the scat is only .092 the bigger the radius the more strength the crankshaft has. The bigger radius will require chamfered rod bearings to clear without having fillet ride, which will quickly damage the bearing.

[stock car driver]

I would prefer a gm cast crank over scat and eagle and keep rpm to 7000 MAX.

oem seem to flex and not crack where the scat cast cranks seem brittle, when I ran them they were always cracked at rebuild time. I had well balanced stuff but very heavy speed pro pistons and 6500 rpm max.

[RW57]

Stock car driver that is exactly what the new machinist we are going to use told me he prefers stock gm over either one.