2.4 crank pictures, opinions.

**Halon** · 07-13-2009

So as I said in a different thread, I am considering going with a stroker setup next year. I sourced a crank, but am a bit concerned about it. I haven't boughten it yet. The seller sent me pictures. Here's the pictures, and here is what he said. I was wondering what some of the experts would have to say about this. Also, this is a virgin crank.

Sending pics now. Make sure you look at them pretty close. It appears there is a little scoring on the center (thrust) bearing. I'm not sure if you are planning on cutting this crank or not. Let me know.

**Goat Blower** · 07-13-2009

It's really hard to tell if it will polish out or not, I sure wouldn't cut it. You really need to see it in person when it's questionable like that.

FattyBoomBatty · 07-14-2009

I don't know about the 4g6x motors, but my crank is .020 under all around and it's been working perfectly for years. Just had it polished and rebalanced last winter, no extra cutting, but it's fine again. So, if all you have to do is cut it, what other problems would there be?

Super Bleeder!! · 07-14-2009

some 4g cranks (usually the turbo ones) are nitrided. cutting a crank removes this nitriding, and its expensive to reapply and straighten the crank.

jhaan_dude · 07-14-2009

of coarse the g54b cranks dont have a problem! they weight like 80lbs! it looks like it had a catch of something on the journal, either bearing or debris, but it would take some "cleaning" to smooth it out. most likely it will NOT polish out.

FattyBoomBatty · 07-14-2009

my crank is forged and nitride hardened stock, so when I had it turned down it had to be renitrided. As I recall, it was less than 100 bucks. Maybe 70 or lower. Crankshaft supply did all the crank work though, so just call them, maybe ask if they can tell from the pictures what needs to happen.

**mx3twinturbo** · 07-14-2009

Quote:

Originally Posted by FattyBoomBatty

my crank is forged and nitride hardened stock, so when I had it turned down it had to be renitrided. As I recall, it was less than 100 bucks. Maybe 70 or lower. Crankshaft supply did all the crank work though, so just call them, maybe ask if they can tell from the pictures what needs to happen.

Agreed,

**Halon** · 07-14-2009

If the crank needs to be ground down, then I'm not interested at all. From the sounds of it, it sounds like there is a pretty general concensus that it more than likely will not polish out, and will have to be ground. So if that is the case, then I'm already not interested.

jhaan_dude · 07-14-2009

ask iceminion he has a few of them laying around. i know he has one thats been micropolished and looks great (sold it to him!)

FattyBoomBatty · 07-14-2009

Just out of curiosity, why don't you want to have a ground crank? Do they become significantly weaker or something?

**Halon** · 07-14-2009

Because I have a feeling it will slightly affect bearing clearances, which I'd rather try to avoid.

95talonracer · 07-14-2009

I didnt get that crank ready for you to check out today since I worked alot later then expected but am trying to have it ready by Thursday night for ya.

**Halon** · 07-15-2009

Sounds good. I'm in no hurry dude.

jhaan_dude · 07-15-2009

with a ground crank you get alot more bearing thickness. bearings arent as hard as cranks so they add squish room. in a stroker if you add a thicker bearing it allows the crank to have room to wiggle at high horsepower and rpms!

95talonracer · 07-15-2009

Quote:

Originally Posted by jhaan_dude

with a ground crank you get alot more bearing thickness. bearings arent as hard as cranks so they add squish room. in a stroker if you add a thicker bearing it allows the crank to have room to wiggle at high horsepower and rpms!

Why take the chance with a turned crank when you can get a perfect stock spec one and know it is good. If the regrind is off just ever so slightly then that was a big waste of money and time. Halon go for a stock spec, NON-ground crank. He has the time to find one since it is not anywhere near winter yet and that is when he wanted to do the 2.3 by what I understood.

jhaan_dude · 07-15-2009

i know, i was trying to steer him AWAY from a ground crank!

bob123131 · 07-15-2009

Hard to tell, but i would bet you can get buy with a polish, but if your worried about it just get it ground and use race bearings, most shops wont run them with hardened cranks anywase.

95talonracer · 07-15-2009

Quote:

Originally Posted by bob123131

Hard to tell, but i would bet you can get buy with a polish, but if your worried about it just get it ground and use race bearings, most shops wont run them with hardened cranks anywase.

I still wouldnt take a chance when pushing 550-600+ hp like it seems that he will be running.