Scat cranks
 

Does anyone have hands-on experience with the Scat crank? I have a pal who wants to do some beer-budget mods to his 454's. For $575, they look tough to beat. Company appears to be reputable and based here in the US. I understand that they're an imported forging but the machine work is done here.

Looking at the stock rod length 4.250 piece. Maybe 600-625 hp.

Downsides?

I have heard of some guys using them with good results. I had a Eagle Crank in my old 540, wasnt true out of the box. Sorry cant be of more help.

For the money Scat has a nice product. Compared to the other imports, they have the best machine work.

Call Bill at Ateco. He is a Scat dealer and has been for years. He uses Scat unless a customers specifies something else and he has been building big power for years. He might be able to help your buddy out too. He sells rotating assemblies for a very decent prices.

Ateco Engine and Dyno Shop (847)623-2737

Kirk

Chris,
I have used more than a few Scat cranks and could not be happier with them. I have made upwards of 1000 hp with one with no issues. I wouldn't recommend it, but it is what the customer wanted. The engine started at around 750hp and grew from there. I usually use them in my 650's and they work great. I am not at all happy with the Eagles. The journels are all over the place. They seem to be Scat's competition and to me it is no comparison. Tell your buddy not to hesitate using a Scat crank to make 625 hp.
Eddie.

Eddie,

In looking at their catalog, I see two rod lengths listed. Is one for short deck and the other tall or do they have a high pin on the long rod length? If so, the longer rod is attractive but do you have piston rock issues with such a short slug?

Chris,
If yo are going with a 4.25 stroke crank, then use the .250 long rod(6.385) and use a piston with a 1.27 comp. height. I will not go any lower than a comp height of 1.25. As long as the piston you choose doesn't have an exceptionally short skirt, you will not have a problem with excessive piston rock. If it were going in a tall deck, than I would use a 6.800 rod.
Eddie

If you buy a scat rotating assembly, call and check part no's.
Their catalog has been wrong in the past. I know first hand. I'm running a scat crank with 6.385 H beam rods in a 540.
No complaints.

I use Eagle. Just seem to have less issues than the Scat's.

saw a Scat crank with it's nose/snout---torn/sheared off, it was on a blower engine, prob. over stressed OR just a fluke forging. :eek:

Ironic you should mention that. They have this newsletter on their site- topic is broken snouts.

Hey Jay!

I've seen some high quality cranks (Lunati, Callies) break off at the snout too if the blower belt is too tight. There isn't any give in a toothed Gilmer belt.
I know on my own boat with 671's and Superchillers, there is a LOT of growth as the motor heats up. When stone cold if the tension is set at 1/2" play, the belt is tight as a banjo string when things get hot. If your not consistantly checking blower belt tension to get a feel for where it needs to be when cold, somethings gonna give.

See ya in the spring!

Kurt

a little :offtopic: Kurt can't wait, Ya, blower belt tension it's always sum-thin. u-be in my-am-eee next mo. wish I was goin :( - great to see you in KW. Thanks, will call you & see ya @ "Brayes" ---your friend--J--:D