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440 Bore Question. #311533
05/08/09 09:56 AM
05/08/09 09:56 AM

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Anonymous OP
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I have a 1972 440 that I am planning a rebuild for. Is there any problems or issues with boring this block .060 over? This is a street engine only. Will probably never see a drag strip.

Thanks,

Re: 440 Bore Question. #311534
05/08/09 10:04 AM
05/08/09 10:04 AM
Joined: Nov 2003
Posts: 34,866
Lincoln Nebraska
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RapidRobert Offline
Circle Track
RapidRobert  Offline
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Joined: Nov 2003
Posts: 34,866
Lincoln Nebraska
Most likely you would be good but I(myself) would have it sonic checked, the price is not prohibitive & then you will know for sure that your foundation is SOLID & it gets a person in the mindset of not assuming anything which sooner or later will end up biting a person in the a$$ usually at the most inopportune time.


live every 24 hour block of time like it's your last day on earth
Re: 440 Bore Question. #311535
05/08/09 10:09 AM
05/08/09 10:09 AM
Joined: Nov 2005
Posts: 1,865
San Angelo, Texas, U.S.A.
1968RR Offline
top fuel
1968RR  Offline
top fuel

Joined: Nov 2005
Posts: 1,865
San Angelo, Texas, U.S.A.
If it will clean up, you may consider boring it .055" over instead of .060". The piston selection is better for .055"-over than it is for .060". It sounds crazy, but it's true...

Good luck.


"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
Re: 440 Bore Question. [Re: 1968RR] #311536
05/08/09 10:22 AM
05/08/09 10:22 AM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
Too Many Posts
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Marysville, O-H-I-O
sonic check it. you want at least .150 on the major side.

although some shops will tell you they know of guys running huffers, nitrous, etc. on .100

the shop that did my block tried to talk me out of the sleeve when the cylinder wall was .128, but once they understood that I wanted .150 they were happy to do the work (and increase my bill )


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Re: 440 Bore Question. [Re: 70Cuda383] #311537
05/08/09 10:32 AM
05/08/09 10:32 AM
Joined: Jan 2003
Posts: 73,560
U.S.S.A.
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JohnRR Offline
I Win
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Quote:

sonic check it. you want at least .150 on the major side.






, have it checked first to see how good it is at the bore it's at now , the major thrust side is not the only place you should be concerned with it's thickness .

Re: 440 Bore Question. [Re: JohnRR] #311538
05/08/09 10:39 AM
05/08/09 10:39 AM
Joined: Jan 2003
Posts: 19,677
Niles , Ohio
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therocks Offline
Its Lost
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Posts: 19,677
Niles , Ohio
Unless its been bored or has a bad cyl Id bore it .030.Then if it needs bored again your can recut it.Cheaper than having to sleeve it if it needs bored again.Rocky


Chrysler Firepower

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