502 crank question
#2
Registered
ob,
Someone is probably going to proove me worng on this, but I didn't think there was such a thing as a cast 502 crank so I would have to say that yours is definitely forged ?
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
Someone is probably going to proove me worng on this, but I didn't think there was such a thing as a cast 502 crank so I would have to say that yours is definitely forged ?
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
#3
Platinum Member
Platinum Member
Your 390/502 has a forged crank.
There's no such thing as a cast 502 crank (as supplied in a motor sourced from GM). All cranks that came from GM in a 502 are forged. All pistons that came from GM in a 502 are forged (but there are several variations). All rods that came from GM in a 502 are forged and have 7/16 bolts. All heads that came from GM on a marine 502 are rectangular port (some crate motors had alternate heads).
There's no such think as a Gen IV 502. The 396/402/427/454/502 Std Deck GM Big Block is a MkIV thru around 1990, when the Gen5 was released.
MC
There's no such thing as a cast 502 crank (as supplied in a motor sourced from GM). All cranks that came from GM in a 502 are forged. All pistons that came from GM in a 502 are forged (but there are several variations). All rods that came from GM in a 502 are forged and have 7/16 bolts. All heads that came from GM on a marine 502 are rectangular port (some crate motors had alternate heads).
There's no such think as a Gen IV 502. The 396/402/427/454/502 Std Deck GM Big Block is a MkIV thru around 1990, when the Gen5 was released.
MC
#4
Registered
Your 390/502 has a forged crank.
There's no such thing as a cast 502 crank (as supplied in a motor sourced from GM). All cranks that came from GM in a 502 are forged. All pistons that came from GM in a 502 are forged (but there are several variations). All rods that came from GM in a 502 are forged and have 7/16 bolts. All heads that came from GM on a marine 502 are rectangular port (some crate motors had alternate heads).
There's no such think as a Gen IV 502. The 396/402/427/454/502 Std Deck GM Big Block is a MkIV thru around 1990, when the Gen5 was released.
MC
There's no such thing as a cast 502 crank (as supplied in a motor sourced from GM). All cranks that came from GM in a 502 are forged. All pistons that came from GM in a 502 are forged (but there are several variations). All rods that came from GM in a 502 are forged and have 7/16 bolts. All heads that came from GM on a marine 502 are rectangular port (some crate motors had alternate heads).
There's no such think as a Gen IV 502. The 396/402/427/454/502 Std Deck GM Big Block is a MkIV thru around 1990, when the Gen5 was released.
MC
330P motor was a Gen 6 block. Along with:
http://www.crateenginedepot.com/ZZ-5...P9419C604.aspx
#6
MC, All good information. I think he was calling the MkIV block the Gen IV. To further your post, in 1998 the Gen 6 block was brought into production by GM. My Merc 7.4L
330P motor was a Gen 6 block. Along with:
http://www.crateenginedepot.com/ZZ-5...P9419C604.aspx
330P motor was a Gen 6 block. Along with:
http://www.crateenginedepot.com/ZZ-5...P9419C604.aspx
You are correct. I was calling the mkIV the gen IV by mistake.