Author Topic: crankshaft selection ?  (Read 1864 times)

Offline 1979mmx350

  • Newbie
  • Posts: 38
crankshaft selection ?
« on: November 25, 2015, 09:24:16 PM »
Threw a rod or two so Im beginning my search for a replacement crank and full rod setup. Really just looking for suggestions and any other info you guys might have to offer. So far, I've narrowed it down to Eagle Specialty and this Scat crankshafts as they are fairly cheap. No leads on rods, but I'm open to advice there.

Note: Not really looking to stroke or destroke my motor. I found this one and was wondering if anyone's ran it before.

http://www.amazon.com/gp/product/B003N2RRTY?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=ATVPDKIKX0DER

And an alt. from Eagle Specialty:

http://www.amazon.com/Eagle-Specialty-Products-103503480-Crankshaft/dp/B000CNGOX2/ref=sr_1_fkmr0_1?s=automotive&ie=UTF8&qid=1448508788&vehicle=1933-47-865-------------0&sr=1-1-fkmr0&ymm=1933%3Achevrolet%3Aeagle&keywords=Eagle+Specialty+Products+103503480+3.48%22+Cast+Steel+Crankshaft+for+Small+Block+Chevy
« Last Edit: November 25, 2015, 09:33:32 PM by 1979mmx350 »
1979 C10 Scottsdale 5.7L 4spd

Offline Engineer

  • Senior Member
  • ****
  • Posts: 1396
Re: crankshaft selection ?
« Reply #1 on: November 25, 2015, 10:00:18 PM »
Might check on some of the go-fast forums. Eagle has sort of lost its reputation in the last few years.

If you threw a rod or two you probably need a new block as well.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5359
Re: crankshaft selection ?
« Reply #2 on: November 25, 2015, 11:38:06 PM »
There's a story here...!    How did it happen?   :o

In my DD I use a forged Scat crank and H-beam rods nestled in Clevite TriArmor coated H-Series rod and main bearings connected to forged Wiseco pistons, all supported by splayed steel four-bolt mains.  Oil pump pushes 90 PSI of Mobil 1 5w-50.  Yet, I rarely twist over 5 grand....

What's the intended future (ab)use for your truck?

I concur.  There's a very high probability the block is dead.   :(
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline 1979mmx350

  • Newbie
  • Posts: 38
Re: crankshaft selection ?
« Reply #3 on: November 26, 2015, 05:19:13 PM »
I have no tach and was gunning it up a slight incline in third as I was coming up to an overpass. I stopped at a light right before the cross way and started hearing a knock once I threw it in gear and began accelerating again. Ended up having to limp her home, but she made it.

As for intended use? Haul  and pull some major burnouts.
« Last Edit: November 26, 2015, 08:40:27 PM by 1979mmx350 »
1979 C10 Scottsdale 5.7L 4spd

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5359
Re: crankshaft selection ?
« Reply #4 on: November 26, 2015, 10:48:46 PM »
So you didn't actually toss a rod.  If you're sure it's coming from the rotating assembly, drop the pan and take a careful look.  Did it lose oil pressure?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline 1979mmx350

  • Newbie
  • Posts: 38
Re: crankshaft selection ?
« Reply #5 on: November 26, 2015, 11:21:55 PM »
It sounds like there's a ton of crap bouncing around in the oil pan which lead me to believe I might be dealing with some type of bearing issue. Like everything blew apart at what was probably somewhere between 6500 and 7000 rpm.
1979 C10 Scottsdale 5.7L 4spd

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5359
Re: crankshaft selection ?
« Reply #6 on: November 27, 2015, 09:59:04 AM »
Better take a look inside before you commit to anything.  Sounds like you might be better off with a complete engine.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Engineer

  • Senior Member
  • ****
  • Posts: 1396
Re: crankshaft selection ?
« Reply #7 on: November 27, 2015, 11:08:42 AM »
Yeah. New GM replacement crate engines with warranty are very cheap right now.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline 1979mmx350

  • Newbie
  • Posts: 38
Re: crankshaft selection ?
« Reply #8 on: December 07, 2015, 05:10:02 PM »
If I simply went for a new block/pistons and swapped everything else would I have a decent running motor? Where else might my motor have wear/damage?
1979 C10 Scottsdale 5.7L 4spd