dkbykesdk

iTrader: (13)

best crank an why, how much?

DAVESS02

iTrader: (30)

I've owned both a lunati and an eagle. The lunati had an oil shed coating, finer machining on the weights, and tapered leading edges on the weights. It was also way more than the eagle.

AU N EGL

What are the weights of each crank?

Interlizer130

callies dragonslayer

White_Hawk

iTrader: (3)

Other than the stroke, I don't see a lot of reason to go forged. Hell, the stocker can do 9's all day. I would get the cheapest crank you can.

-Geoff

ReiKo

Just go Eagle...

Robin L

Weight is not a huge factor for us. We need stength. The Lunati is a little heavier in all the right places.

We looked at the Callies next to the Lunati and went with the Lunati.

We could not get some of the options that we wanted on the Eagle.

I have an LS3 with a TVS 2300 that will get a stock stroke Lunati forged crank very soon.

Robin

JBM

iTrader: (15)

No reason to ever go with Eagle. Especially if you have a manual. They have yet to resolve the issue with the piolt bearing not fitting tight enough.
Compstar is THE budget crank.

White_Hawk

iTrader: (3)

Stock is the budget crank unless you need some stroke.

-Geoff

dkbykesdk

iTrader: (13)

stroker 4"

LS6427

iTrader: (2)

How many stock cranks have broken? Anyone know of any?

How about a broken forged crank?

I've got a Cola crank, its supposed to be one of the best cranks ever made. But they dont make them anymore, too bad.

JBM

iTrader: (15)

Its not about the crank breaking. It is more about build quality, tolerances, and features.

LS6427

iTrader: (2)

Its ALL about the crank breaking, thats the only reason people buy forged cranks for big power builds. No matter how well a stock crank is built or how well the builder preps it and installs it, it will snap like a toothpick with too much power/torque.

I'm just curious if anyone actually knows about ANY kind of cranks breaking. Seems to be a seriously rare event, no matter which type of crank is used.

JBM

iTrader: (15)

Wrong. People buy an after market crank for the longer stroke. Find me someone who rebuilt a 346 and didnt use the stock crank. The stock crank is not the weak point of the bottom end. I'll wait for the snapped toothpick picture when there is one.

lilred1995vette

iTrader: (19)

go with either crank besides the eagle, they have problems with poor oiling holes. imo

lilred1995vette

iTrader: (19)

That about factory cranks is not true in any way, i know some drag engines for class racing and running 10k rpm and do fine! Most people go aftermarket for strokers!

ReiKo

I know of a few...
Never seen a Eagle crank have poor oiling holes... Is this your experience or hear say?
There's a huge difference in running a assembly at 10k rpm @550hp then running a assembly 7K @1,500+hp...

Gen414

iTrader: (38)

While the stock GM crank is strong, and can handle it's fair share of a beating, and is NOT the weak link on a stock bottom end, if you do become a real "player" and start making some power, you will break the stock crank eventually. A Forged steel crank is stronger. Most people that plan on high 10's, can get by on the stock crank, no question. And YES, I do know that alot of people are running quicker ET's with the stock crank. All I am saying is, WHY? When you start making serious power, and sstart running low 10's and quicker, why would you risk it? Has anyone seen what a broke crank will do to your motor? I have. It's not pretty, it CAN take out your whole motor. Block, rods, pistons, cam, water pump (yes, the water pump). I had a crank come apart on me, and did just that. It also took out my oil pan, and STARTER. Yep, when the crank let go, ripped a rod apart and slung the rod through the block and knocked the starter clean off. Broke the mounting lugs. When it spilt the block, it seperated my water pump in half as well. Now, I am NOT saying that can't happen with a Forged crank either. I am saying again, that the Forged crank (and just quality parts in general)gives you better insurance again Carnage like that. Winberg, Scat, Lunati all make killer cranks by the way.

I went with Eagle in my motor, as it was the cheapest Forged crank, and I used an Eagle in my Ford, and I beat it with 1000HP for a couple seasons with good luck.

Tom@SpeedInc

iTrader: (5)

The best 4" crankshaft under $1,000 IMO is Compstar IMHO

Keyed, the chamfurs are done nicely and you can buy it in 2" journal

LS6427

iTrader: (2)

There are plenty of stock cubed forged bottom end engines. Stroke is NOT the only reason to use a forged crank....its for more strength.

Boosted 346's are limited to their power/torque output because of the stock crank. I know a couple people that went forged pistons and forged rods with sc'ers and turbos, they are limited by what the stock "cast" crank can handle. Otherwise they would turn up the boost and make 1,200 hp. instead of 700 hp.