Mustang Evolution Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter #1
When I bought my car the guy claimed it was a 331 stroker... My question is I'm about to pull it to do work is there anyway to tell with the oil pan off what I'm working with or am I better off to ship it down to the machine shop thanks
 

·
Premium Member
Joined
·
3,444 Posts
1fstgt said:
When I bought my car the guy claimed it was a 331 stroker... My question is I'm about to pull it to do work is there anyway to tell with the oil pan off what I'm working with or am I better off to ship it down to the machine shop thanks
You would need to pull the heads and mic the cylinders to see what the bore is. You would also need to check the stroke. Don't know what you would be able to find taking the oil pan off.
 

·
Registered
Joined
·
50 Posts
You might be able to get the casting numbers off of the crank and look them up and it will tell you what you have with the oil pan off. Also with some stroker kits you have to notch the bottom of the cylinder bore for rod clearance. You can look and see if that has been done. Casting numbers would be the easiest way to tell without more disassembly.
 

·
Registered
Joined
·
1 Posts
On the top of the pistons it might say .030 meaning its bored. Then u just have to find out the stroke. That happened to me. Guy claimed it was a 347. Me being lazy ordered custom diamond pistons for a 347 without checking. Well then I found out it was actually a 331 so I opted to get the right crank to make it a 347
 

·
Registered
Joined
·
50 Posts
+1 about looking at the top of the piston for the bore size, I was thinking of a way without having to pull the heads to look. You can also look on top of most pistons for the part number to see what brand they are and if they are forged or not. You may be able to see the numbers with a bore scope through the spark plug hole, but chances are carbon buildup on the piston will make it difficult to read them as they are pretty small. A lot of pistons have the manufacturer logo cast into the bottom of the piston.
 
1 - 5 of 5 Posts
Top