Rabble

Was looking at a Scat Rotating Assembly. I've only herd bad things about eagle cranks and am curious what you guys thing of this
http://www.summitracing.com/parts/SCA-1-41831BIE/
My goals are about 440-450 rwhp. Want to run high compression on e85. I also plan on running anywhere from a 150-250 shot of nitrous. This should hold it, I'm just wondering if it is a good choice. Also, what about the price? Can I do better?

95sscamaro

iTrader: (6)

Your engine builder will hate you for bringing him SCAT, mine did, said it was a pain in the a$$ to balance, o well. Have you looked @ Compstar

Rabble

No I haven't. My uncle and I are building the engine, the shop will only be doing the things we can't. (.30 over bore, stroker clearances, 4 bolt main splayed caps, balancing, etc) Also, it says it comes balanced, how's that work? Is it actually balanced or just close?

96capricemgr

iTrader: (1)

Compstar stopped offering 1-piece rear main cranks so you would need to use an adapter with them BUT that is Callies budget line and is barely any more money.

440-450rwhp NA is doable but you probably wont get there with DIY heads and some popular offering might get you there on the dyno but not work so wonderfully at the track.
Hope you choose better there than the rotating assembly.

Rabble

Heads are being done by LE, same with cam and intake.

"Hope you choose better there than the rotating assembly. "

Rather than being negative about it, how about you contribute to the thread. If you think my choice in the rotating assembly is poor, than offer something up rather than just saying its ****. I want to know why its bad, where I can improve both in price and quality. I'm looking for information, not criticism on my build, that's not what this thread is about. The only reason I gave that information is so there is something to relate to.

defaultexistence

iTrader: (11)

Don't assume eagle is bad, cast is one thing but the 4340 forged cranks are in ALOT of engines putting down the numbers you want. Mine balanced very well with minimal material drilled and removed , none of the journals were outta round or needed cleaned up or cut on..

Greaseymec

iTrader: (9)

I'm running an Eagle LW 4340 crank and Scat H beams. Have had the same crank in two different builds with no problems. My machine shop had no problems balancing both times. Lots of folks in here don't like Eagle. I have no complaint so far. Lots of passes with no problems.

Mec

95sscamaro

iTrader: (6)

Its good to check the balance, you mite get lucky and it not be that far off. sounds like a good build, LE is the man i am very happy with my setup from him

96capricemgr

iTrader: (1)

Reading is fundamental.

Someone sent you on a wild goose chase for parts no longer made and I offered you a solution.

Given the other parts though just go with the Scat stuff you picked first.

Even with E85 though I think your goal is high for the parts chosen.

SS RRR

iTrader: (2)

Absolutely. The last thing you want to do is have it assembled and vibrate the bearings right out of the engine.

Rabble

So would I be better off buying a rotating assembly that isn't balanced and save some money, then just use that money to get it properly balanced?

defaultexistence

iTrader: (11)

Yes....

Clayton Racing

That assembly has a -16cc dish piston. Not exactly what I'd consider as high compression for e85 and nitrous. Also what brand piston was that with? is it 4340 or 2618 material?

quik95lt1

iTrader: (7)

4340 piston?? steel piston would be a bit heavy lol ill call that a typo

*4032


also yes like he said the -16 dish prob isn't going to be your answer there...


also the 2 piece rear main isn't an issue.......i run a two piece callies magnum crank in mine the adapter is about $100 if iirc to adapt the 2 piece sbc crank to the 1 piece rear block....

Greaseymec

iTrader: (9)

I'm running JE 181920 pistons. My CR worked out to 12.3 by the math.

Mec

quik95lt1

iTrader: (7)

i wouldnt have an issue with a scat 4340 crank nor the scat h beam rods.......as for pistons the SRP Pro Series are a great piston at a great cost.......ive been running them in mine for a few years now and they run fantastic

97Z28SS

iTrader: (5)

Check out Competition Products or Howards, I got a Howards Tracksmart 4340 forged crank, 6" H beam rods and Mahle Power Pac pistons, with rings and coated bearings for $1900 and the crank and rods are made in the USA.

SS MPSTR

iTrader: (1)

No issues with Scat products here either - have their crank and rods in my 385 and 496. Neither was difficult, or expensive, to balance.

Ed Wright

iTrader: (1)

There is absolutely nothing wrong with Scat components. I have done several using them. Never one issue with balancing, or anything else. Can't say the same for eagle. I have had the same Scat crank assy in mine for three years now, goes over 8000 RPM every pass.

Rabble

You read it wrong, +16cc, pretty sure its a dome piston.