383 with a .060 over bored block? - Page 2 - Chevy Nova Forum
Visit our sponsor, National Nostalgic Nova
 
Steve's Nova Site is an automotive enthusiast website dedicated to the 1962 - 1979 Chevrolet Nova, Chevy II and Acadian automobiles. We work together to preserve, restore, drive, show, race and provide fellowship for these classic cars. This is one of the best places to find information about parts, rebuilding, restoration and racing. This website is not affiliated with GM, General Motors or Chevrolet in any capacity.

Go Back   Chevy Nova Forum > Body, Chassis and Mechanical > Drivetrain & Performance


StevesNovaSite.com is the premier Chevrolet Nova Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
Old 9th-December-2012, 04:54 PM   #16
DevilDeuce
 
DevilDeuce's Avatar

Title: Nova Junior Member
iTrader: (0)
Status: Offline
Join Date: Dec 2009
Location: new bern, nc
Nova(s): 1963 HT , Heidts mustang
Posts: 62
Well going off of what CNC blocks is saying . Its probably better to be safe then sorry. But, if i go and buy another block with a std bore. Will i have to get it sonic test also at .030 over? Thanks for all the info.

Sent from my SPH-D710BST using AutoGuide.Com Free App
  Reply With Quote
Sponsored Links
Advertisement
 
Old 9th-December-2012, 05:33 PM   #17
dealer-deuce
 
dealer-deuce's Avatar

Title: Nova Guru
iTrader: (11)
Status: Offline
Join Date: Jan 2010
Location: North Tacoma
Nova(s): A FAKE 63 NOVA
Posts: 740
Overbore

I would agree with CNC I had my 327 362 block sonic checked before I even
thaught of machine work. all blocks are different the biggest issue is casting
shift. cylinders walls can differ in thickness do to casting process some blocks
may only take the 30 overbore and some make take 60 overbore as long you
have it checked out and you have good thickness on the thrust of all of the
cylinders. I personally do not run my set up on the, track you can buy on those
fancy dart blocks to beat on I think there are plenty of standard bore 350
blocks out there for a decent price. make sure you buy top end enternal
parts for your build. I spent $6000.00 on top notch parts and machine work
it is rare block and plan on keeping it that way
  Reply With Quote
Old 9th-December-2012, 06:02 PM   #18
sbc1320
 
sbc1320's Avatar

Title: Nova Guru
iTrader: (0)
Status: Offline
Join Date: May 2008
Location: Houston,Texas
Nova(s): 1972 Nova -383
Posts: 10,687
Quote:
Originally Posted by DevilDeuce View Post
Well going off of what CNC blocks is saying . Its probably better to be safe then sorry. But, if i go and buy another block with a std bore. Will i have to get it sonic test also at .030 over? Thanks for all the info.

Sent from my SPH-D710BST using AutoGuide.Com Free App
Mine is .030 and I beat on it hard. Can't get it to use any oil, just have to tow a gas station behind it. Put a little over 2500 miles on it since I built it a year ago.
__________________
72 Nova -383(11.70s) - Sold

Last edited by sbc1320; 9th-December-2012 at 06:18 PM.
  Reply With Quote
Old 9th-December-2012, 06:09 PM   #19
DevilDeuce
 
DevilDeuce's Avatar

Title: Nova Junior Member
iTrader: (0)
Status: Offline
Join Date: Dec 2009
Location: new bern, nc
Nova(s): 1963 HT , Heidts mustang
Posts: 62
Well safe is were i want to be. Im not much of the gambling type, especially when 4-5 grand is at stake.

Sent from my SPH-D710BST using AutoGuide.Com Free App
  Reply With Quote
Old 9th-December-2012, 06:40 PM   #20
sbc1320
 
sbc1320's Avatar

Title: Nova Guru
iTrader: (0)
Status: Offline
Join Date: May 2008
Location: Houston,Texas
Nova(s): 1972 Nova -383
Posts: 10,687
Quote:
Originally Posted by CNC BLOCKS View Post
Going by core shift is a poor indicator from what I have seen.
You can see the coreshift in my freezeplug boss' and front cam area. I only had to clearance one side of the block's cylinders for my stroker.
__________________
72 Nova -383(11.70s) - Sold
  Reply With Quote
Old 10th-December-2012, 08:29 AM   #21
CNC BLOCKS
 
CNC BLOCKS's Avatar

Title: Nova Guru
iTrader: (1)
Status: Offline
Join Date: Aug 2008
Location: NORTHEAST
Posts: 751
Quote:
Originally Posted by sbc1320 View Post
You can see the coreshift in my freezeplug boss' and front cam area. I only had to clearance one side of the block's cylinders for my stroker.
I have blocks that sonic tested great but core shift was way off, I have alot of blocks that show no coreshift that have failed a sonic test mostly one cylinder will make them fail.
  Reply With Quote
Old 10th-December-2012, 08:33 AM   #22
CNC BLOCKS
 
CNC BLOCKS's Avatar

Title: Nova Guru
iTrader: (1)
Status: Offline
Join Date: Aug 2008
Location: NORTHEAST
Posts: 751
Quote:
Originally Posted by DevilDeuce View Post
Well going off of what CNC blocks is saying . Its probably better to be safe then sorry. But, if i go and buy another block with a std bore. Will i have to get it sonic test also at .030 over? Thanks for all the info.

Sent from my SPH-D710BST using AutoGuide.Com Free App
I have alot of blocks that are not good for .030 over that have no core shift. Its best to check.

I sonic test first before anything is done, for 40.00 dollars its good insurance.
  Reply With Quote
Old 10th-December-2012, 09:32 AM   #23
carjai
 
carjai's Avatar

Title: Nova Guru
iTrader: (4)
Status: Offline
Join Date: Nov 2008
Location: Lawndale, CA
Nova(s): 73 nova
Posts: 660
Quote:
Originally Posted by DevilDeuce View Post
Is anybody running a .060 block? I plan on going the aluminum head and roller cam and lifters route. Once i get my car together, I plan to drive it like I stole it. With that being said i want it to be reliable at the same time. Im not trying to throw money down the drain.


Sent from my SPH-D710BST using AutoGuide.Com Free App

I pretty much had the same build, my last motor was a 388, 340 block .060 over with 3.75 stroke. It ran great, and held up well. As far as hp numbers I do not know what they were. But the come was sportsman II heads ported by dr j . Lunati voodoo solid flat rapper cam(257/265@ .050 560/580 on 108). Had a plenum ported hurricane intake, flat top piston etc. Well cam broke in 3 places. Motor was destroyed. I would do it all over again with better parts to make a long story short. So you should be fine
  Reply With Quote
Old 10th-December-2012, 12:07 PM   #24
bowtie0069
 
bowtie0069's Avatar

Title: Nova Guru
iTrader: (0)
Status: Offline
Join Date: Jun 2005
Location: So. Cal.
Nova(s): 69
Posts: 10,082
Quote:
350 cylinder walls are plenty thick to handle .060 over
Quote:
I have alot of blocks that are not good for .030 over that have no core shift
I have a real mild .060" over 350 that runs well, but also runs hotter than my 600 h.p. 400.

I had a .030" over 350 block that looked great as far as core shift went, but it had a spot in one cylinder that was about .035" thick, and poured water into that cylinder; at first glance it looked OK, but a little stained area in the bore was thin enough to stick a screwdriver through! We sleeved that hole because it was a low buck build with a Chinese crank and KB hyper pistons, but it still ran 10.20's at 131 in a 71 Nova.
__________________
69 Nova 410" small block-Driven to track
6.39 E.T./105 MPH--6.11/112.89 w/N2O
bowtie0069.fotki.com/
  Reply With Quote
Old 10th-December-2012, 10:38 PM   #25
Baddbob

Title: Nova Guru
iTrader: (1)
Status: Offline
Join Date: Aug 2004
Location: God's Country
Posts: 1,217
A 350 bored .060 will run hot, A friend of mine bought a P.A.W. kit we assembled and it came with a .060 over block. Even with a 4 core radiator we had trouble keeping it cool in his 69 Nova but it ran good! 350 4 bolts are easy to find, I would do a .030 and that way you've got room for a .040 freshen up down the road.
  Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
350 bored 40 over help blueshirtguy Drivetrain & Performance 12 25th-September-2008 10:01 AM


Site best viewed set to 1024 x 768.

All times are GMT -4. The time now is 12:59 AM.

Custom Designed for Steve's Nova Site by: vBSkinworks

 
Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Lt

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.