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#2459693 - 03/01/18 09:25 PM ??? on boring 383 block
Smoparmike Offline
enthusiast

Registered: 01/06/04
Posts: 209
Loc: wisconsin
Generally is a 1970 383 block safe to bore 60 over? I know it should be sonic checked. I know each block is different core shift etc. Just wondering in general. This will be for a mild street car.

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#2459780 - 03/02/18 01:31 AM Re: ??? on boring 383 block [Re: Smoparmike]
calrobb2000 Offline
pro stock

Registered: 01/20/03
Posts: 1502
Loc: s. e. pa.
hi

maby /what size is it now ?

have you considered .040 os ?

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#2459790 - 03/02/18 02:50 AM Re: ??? on boring 383 block [Re: Smoparmike]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 30818
Loc: Bend,OR USA
Why take a chance work
Are you filling lucky whistling
_________________________
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2459813 - 03/02/18 06:48 AM Re: ??? on boring 383 block [Re: Cab_Burge]
fbs63 Offline
pro stock

Registered: 11/17/03
Posts: 1218
Loc: NW Indiana
Does it need to go .060 over? I always use the minimum over bore. I think the rigidity of the thicker cylinder wall outweighs the small cubic inch gain.

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#2459835 - 03/02/18 08:03 AM Re: ??? on boring 383 block [Re: fbs63]
Smoparmike Offline
enthusiast

Registered: 01/06/04
Posts: 209
Loc: wisconsin
Thanks for replies. Block is 30 over now. But has a pretty good ridge I would love it to only need to go .040. I'm taking to machine shop next week.

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#2459864 - 03/02/18 09:24 AM Re: ??? on boring 383 block [Re: Smoparmike]
Jerry Offline
master

Registered: 01/20/03
Posts: 6773
Loc: Warren, MI
the ridge isn't the critical part. bore taper is. once its checked the ridge could be removed with a minial over bore.
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#2459900 - 03/02/18 10:38 AM Re: ??? on boring 383 block [Re: Jerry]
Smoparmike Offline
enthusiast

Registered: 01/06/04
Posts: 209
Loc: wisconsin
I didn't know that. Makes sense though.

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#2459931 - 03/02/18 12:00 PM Re: ??? on boring 383 block [Re: Smoparmike]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 30818
Loc: Bend,OR USA
Originally Posted By Smoparmike
Thanks for replies. Block is 30 over now. But has a pretty good ridge I would love it to only need to go .040. I'm taking to machine shop next week.

Usually if you can feel the ridge, especially a big one, it will need more than .030 whiney I hope not, let us know what they find luck
_________________________
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2480126 - 04/09/18 04:45 PM Re: ??? on boring 383 block [Re: Smoparmike]
Smoparmike Offline
enthusiast

Registered: 01/06/04
Posts: 209
Loc: wisconsin
Block needed to go.060. Would not clean up at.040. Had it sonic checked and they are putting in one sleeve. This is for my kids car. Bought this motor when he was 13. Put in car and had oil pressure problems. Took it a part not a good as I would have hoped for. Live and learn. He turns 18 next week so hopefully this will be the last of problems.

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