302 Engine bored .40 over... to much??
#1
302 Engine bored .40 over... to much??
Went down to look at the cobra today to find out it has the original 302 cobra engine in it with the 347 stroker kit. My question is, do you think a 302 bored out .40 is to much?
#3
RE: 302 Engine bored .40 over... to much??
If you have a Mexican block, you should be able to safely bore it up to .060 over. The Mexican blocks are stronger because I guess they have a higher nickel content. Use this article to identify your block. http://www.oldwestracing.com/index.h...es/mexican.htm
I have read about people overboring their 302 engines .060 over, but I really don't know how well they hold up.
Other than that, the only way to be sure whether or not your block will hold up to a larger overbore is to have it sonic tested. All blocks are not created equal. Some small blocks won't do well with anything larger than a .030 overbore, and other blocks can withstand overbores of .060 and larger, provided the cylinder wall thickness is still within reason. Find a shop that will sonic test your block for you, and you'll know if overboring to .040 or .060 over is an option.
I have read about people overboring their 302 engines .060 over, but I really don't know how well they hold up.
Other than that, the only way to be sure whether or not your block will hold up to a larger overbore is to have it sonic tested. All blocks are not created equal. Some small blocks won't do well with anything larger than a .030 overbore, and other blocks can withstand overbores of .060 and larger, provided the cylinder wall thickness is still within reason. Find a shop that will sonic test your block for you, and you'll know if overboring to .040 or .060 over is an option.
#5
RE: 302 Engine bored .40 over... to much??
.040 over is not too much in my op. but im a displacement freak. .030 to .040 is not that much how ever it will promote heat but thats about it, and what is the price of the cobra, if reasonable price go for it. i do not recall a 302 block ever having weak cylinder wall the valley will split before the cylinders have integraity problem.
#7
RE: 302 Engine bored .40 over... to much??
The whole engine was redone. The 347 stroker kit was added along with it being bored .040 over. My dad tells me thats bad luck waiting to happen. He says that it could blow at anytime with .040 bored over. He says that 302's should NEVER be bored over .030. My dad knows quiet a bit about mustangs and mustang blocks, so im kinda stuck on what to do.
The car is $10,500.
Its a 1995 Cobra SVT w/ 347 stroker kit. (86,000 miles on it)
The car is $10,500.
Its a 1995 Cobra SVT w/ 347 stroker kit. (86,000 miles on it)
#9
RE: 302 Engine bored .40 over... to much??
ORIGINAL: StrokerSVT
The whole engine was redone. The 347 stroker kit was added along with it being bored .040 over. My dad tells me thats bad luck waiting to happen. He says that it could blow at anytime with .040 bored over. He says that 302's should NEVER be bored over .030. My dad knows quiet a bit about mustangs and mustang blocks, so im kinda stuck on what to do.
The whole engine was redone. The 347 stroker kit was added along with it being bored .040 over. My dad tells me thats bad luck waiting to happen. He says that it could blow at anytime with .040 bored over. He says that 302's should NEVER be bored over .030. My dad knows quiet a bit about mustangs and mustang blocks, so im kinda stuck on what to do.
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