This is topic Huge difference from 302 - 306? in forum Tech Talk at Northern California Ford Owners  .


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Posted by QwikStang (Member # 2933) on :
 
with heads, cam, and intake package....how much hp difference is there between a 302 and a 306? Does the bore really give a ton of hp?
 

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Posted by 87 Saleen (Member # 1549) on :
 
about 4
 

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Posted by MR GO FAST (Member # 2088) on :
 
one is bigger than the other?
 

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Posted by QwikStang (Member # 2933) on :
 
You guys aren't helping any. Should I build a 302 or should I bore it to 306? How big of an improvement is a 306?
 

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Posted by MR GO FAST (Member # 2088) on :
 

quote:

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Originally posted by QwikStang:
You guys aren't helping any. Should I build a 302 or should I bore it to 306? How big of an improvement is a 306?

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sorry. 306 if built correct will make more power if compared to the same builder with the same parts.
 

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Posted by JohnB (Member # 969) on :
 
The wear on your block (the bores) will determine whether or not you'll go 306. It's an over-bore size, you'll see no difference in the HP department.
 

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Posted by stoauto (Member # 2803) on :
 
no hp difference in boring your block, its simply just that.
 

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Posted by Yellow94GT (Member # 431) on :
 
In a word, no.
 

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Posted by racercosmo (Member # 1864) on :
 
You may have some gains on the top end, it would probably only be noticeable on a dyno. As it was said earlier, if the cyllinders will hone, it isn't worth the cost to bore it.
 

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Posted by Jeff S (Member # 371) on :
 
There is no real difference between a BUILT 302 and a BUILT 306. However there can be a big difference in power between a STOCK 302 and a BUILT 306 shortblock.
 

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Posted by DropTopFox (Member # 1689) on :
 
doesn't matter, if you get a new block it will be a 302 if you reuse your block it will be a 306 and you'll see the same numbers
 

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