502 or 454 how to tell ?
#1
Registered
Thread Starter
Join Date: Jan 2003
Location: ohio
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
502 or 454 how to tell ?
I've come across a ski boat with a big block in it and the owner said he's not sure what the engine is. Is there a way to tell just by looking at it?
#3
Registered
Thread Starter
Join Date: Jan 2003
Location: ohio
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
#4
Registered
Thread Starter
Join Date: Jan 2003
Location: ohio
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
thanks
#5
Registered
Join Date: Dec 2006
Location: spokane wa
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
My gen IV 502 has the bowtie also but that just shows it's a GM performance " bowtie " block i think it could be either a 454 or 502 still . the dealer i got the boat from had it listed as a 454 , got her home stood on my head to see the merc s/n tag to find it was a 502
#6
SORE MEMBER
Platinum Member
Join Date: Apr 2004
Location: 29°50'49.74"N 95° 5'17.55"W.......TEXAS
Posts: 6,989
Likes: 0
Received 1 Like
on
1 Post
look for the casting numbers and go here http://www.mortec.com/
this site is an excellent source of info on heads and blocks
BBC numbers http://www.mortec.com/bbc.htm
My 502 is this one
10051107...454...............4-bolt, Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"
this site is an excellent source of info on heads and blocks
BBC numbers http://www.mortec.com/bbc.htm
My 502 is this one
10051107...454...............4-bolt, Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"
Last edited by Wobble; 05-08-2009 at 01:22 PM.
#10
Banned
Join Date: Oct 2006
Location: Bradenton Florida
Posts: 5,927
Likes: 0
Received 0 Likes
on
0 Posts
If some body bored the block ,,,it could be anything !!!
They where stock 454's and then what ever u made them !!!
Chevy gen 4 block !!
Mine is a 510 ci !!! so basically 8.4 liter !!
either way ,,bowtie gen 4 is ok ,,because u can bore out to 4.600 + !!!
Stock is i think was 4.350 or so ?!
Plenty of mat. to work with !! In case it ever break's.
I think the biggest u can go on a Gen 4 bowtie short deck (9.800) is 598 CI !!!!
They where stock 454's and then what ever u made them !!!
Chevy gen 4 block !!
Mine is a 510 ci !!! so basically 8.4 liter !!
either way ,,bowtie gen 4 is ok ,,because u can bore out to 4.600 + !!!
Stock is i think was 4.350 or so ?!
Plenty of mat. to work with !! In case it ever break's.
I think the biggest u can go on a Gen 4 bowtie short deck (9.800) is 598 CI !!!!
Last edited by DareDevil; 05-08-2009 at 12:52 PM.