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-   -   Forged Crank? (http://www.jeepgarage.org/f51/forged-crank-57783.html)

JeepFreak12 04-04-2013 12:30 PM

Forged Crank?
 
Does anyone know where to find a forged crank for my 99 4.7L. I know when they came out with the H.O. it had a forged crank. The motor I'm building will be fully forged internals and i can not find a crank to save my life! Also I'd love it if it was a stroker crank but i think I'm pushing my luck lol

GreenWithEnvy801 04-05-2013 09:43 AM

Re: Forged Crank?
 
I may be mistaken, or told wrong.lol But from what I understand they are all forged.

jeep0086 04-05-2013 10:56 AM

Re: Forged Crank?
 
i bought mine on ebay under a company that specailzes in the 4.7. the one in the pic below is the part number u need. if it doesnt end in the #509 then its not forged and dont waste ur money. the HO's are the only ones that came forged. ive never heard of someone breaking a cast crank. forged is just extra insurance if ur building a boost motor like mine.
http://i953.photobucket.com/albums/a...psea74d44b.jpg

JeepFreak12 04-05-2013 11:58 AM

Re: Forged Crank?
 
I know the regular 4.7 cranks are crack forged but i thought there was a difference. Maybe not lol

JeepFreak12 04-08-2013 02:14 PM

Re: Forged Crank?
 
Jeep0086, did you mean ending in 409? Your crank in the pic says 409 but you typed 509. May be a typo or your trying to trick me lol. And what rods and pistons are you running? P.S. i also dig the ARP bolts/studs!

mandio23 04-08-2013 03:41 PM

Re: Forged Crank?
 
I was running a cast crank on my old boosted engine without issues, acutally the crank was the only thing left in one peace... but that's a different story lol

JeepFreak12 04-08-2013 04:42 PM

Re: Forged Crank?
 
Ouch, What happened? lol As of right now she wont be boosted. Just .030 over, cam, ported heads, '08 intake, Injectors, and so on. Maybe a small turbo soon. But everything internal is forged.

mandio23 04-08-2013 05:45 PM

Re: Forged Crank?
 
3 broken rods, 5 melted pistons and a 5inch hole on the engine block.
At first I thought it was the boost/nitrous combination I was running but when we pulled the a/f logs we notice the fuel pressure dropped instead of increasing... the paxton/aeromotive fuel regulator failed and it cost me an engine.

JeepFreak12 04-08-2013 07:26 PM

Re: Forged Crank?
 
Wow that sucks!! Hope you got everything back together now.

mandio23 04-08-2013 07:50 PM

Re: Forged Crank?
 
yes it is and better than the old one

JeepFreak12 04-08-2013 08:47 PM

Re: Forged Crank?
 
What are your specs? Hp rating and so on also..

mandio23 04-08-2013 11:55 PM

Re: Forged Crank?
 
never been dyno...

block set up (lighter than stock)
cp/carrillo billet rods
custom forged manley pistons (3.72- 60over)
custom stroke crank

heads
custom ferrea intake exhaust valves- 2.02, 1.58
race/boost port and polish
110 springs
solid lifters
218 cams,

f&b throttle body
Paxton 1000/2000 (currently on 2000)
Nitrous- 150

and more... its a never ending list.


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