Is .060 to much for a 302?

stephen4785

New Member

Dec 14, 2003

321

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0

Fort Worth Texas

Feb 21, 2004

#1

• Feb 21, 2004

• #1

I just took my motor out of my car becasue it had low compression on 2 cylinders.It had just been rebuilt.I thought it was a stock 289 with a .030 bore.I tore it apart and found out that it's a 302 with 351 heads,roller rockers,and has been bored out .060 over.Is .060 to much?Iv heard old mechanics tale's that if you bore anything .060 or higher it'll run hot and you cant bore it out more than .060.

 

NKau

Founding Member

Dec 15, 2001

1,346

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37

Jefferson, WI

Feb 21, 2004

#2

• Feb 21, 2004

• #2

.060" is about the furthest that a 302 can be overbored (I've heard of .065").
You shouldn't have any problems.

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

17

89

Dallas, GA

Feb 21, 2004

#3

• Feb 21, 2004

• #3

The cylinder walls are quite thin on the 302 from the factory. I know a guy that recently dropped a valve and sent the valve throught the cylinder wall, I was suprised how thin it was. 60 would be pushing it, any more would be getting really thin.

 

W

wildstang347

New Member

Jan 2, 2004

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Feb 21, 2004

#4

• Feb 21, 2004

• #4

definitely wouldnt want 2 bottle feed it or put a supercharger on it........it would be lucky 2 see a few passes with boost.

 

1

1BAD89GT

New Member

Jan 2, 2004

87

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Oklahoma

Feb 21, 2004

#5

• Feb 21, 2004

• #5

Its pushing it i wouldnt recommend if its a daily driver it will run hotter.

 

PURESTREET5006

New Member

Apr 1, 2003

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In the tech line for tear down"AGAIN"

Feb 21, 2004

#6

• Feb 21, 2004

• #6

I have a .060 over 302 but it's a 69 302 block without any over heating problems with the limited street miles that i do drive the car,but my buddy has a.060 over 91 block and he have no issues what so ever with his 310 cid.

 

banditmwp

New Member

Jan 9, 2004

218

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Opelika/Auburn, AL

Feb 21, 2004

#7

• Feb 21, 2004

• #7

.060 is probably a bit much...

semi-interesting :OT: story....

I was working at Advance Auto Parts and one day this crackhead looking guy came in, wanting to buy some carb float scales. His story was that he was balancing the floats on a Holley 1100 double pumper he was putting on a Ford 460 bored .120" over...I thought "Yeah, and your brain is bored .120" over...here's your pot scales!"

 

88stangmangt

Active Member

Nov 25, 2003

2,332

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48

Stafford,VA

Feb 21, 2004

#8

• Feb 21, 2004

• #8

^^^^^^^^^^^^^^^ baahhahahaah D@mn stoner's.