The Stovebolt Page Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Helping out ...


EVENTS

Check in for status!

Jump over to the Events Forum, to post events -- new ones or the ones we have been enjoying for some time.
Look to see what's been cancelled or postponed.

Encourage one another!

Stovebolt Site Search
 
Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
9 members (63stepsideLB, Bread, MOTOXFAMILY, Flatblu4748, Cozsum, Chris McKenna, 1 invisible), 191 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums50
Topics120,616
Posts966,879
Members43,723
Most Online1,229
Jan 21st, 2020
Image Posting Policy
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
Max overbore on a 235?
#1150611 Wed Feb 17 2016 05:54 AM
Joined: Feb 2001
Posts: 1,130
D
Dusty Offline OP
Shop Shark
I'm contemplating a '48 235 rebuild .

What max overbore is normal for this engine .

Thanks for your time smile

Re: Max overbore on a 235?
Dusty #1150613 Wed Feb 17 2016 06:00 AM
Joined: Sep 2001
Posts: 30,337
ace skiver

http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0624.htm

Shop Manual says 0.040" oversize, but, I have seen people post that larger pistons are available and can be used. Someone will correct/confirm a max practical/available oversize.


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Max overbore on a 235?
Dusty #1150618 Wed Feb 17 2016 06:18 AM
Joined: Feb 2001
Posts: 1,130
D
Dusty Offline OP
Shop Shark
Thanks Tim , that's what I was looking for .

Re: Max overbore on a 235?
Dusty #1150776 Thu Feb 18 2016 05:04 AM
Joined: Feb 2015
Posts: 285
G
Shop Shark
I'm no expert by any means, but I have a 1955 235 bored .060" over. I found .080" pistons when looking to rebuild it and read about some.100" pistons being put in high performance applications, hut no one actually carried them.

Re: Max overbore on a 235?
Dusty #1150821 Thu Feb 18 2016 03:56 PM
Joined: Dec 2008
Posts: 1,473
P
Shop Shark
1/2" over is perfectly safe, everyone says so.

Re: Max overbore on a 235?
Dusty #1150822 Thu Feb 18 2016 04:02 PM
Joined: Sep 2001
Posts: 30,337
ace skiver
I have a 1961 261 that was .060 overbored in 1972 (my second engine rebuild).

It has been back in my Suburban for about 10 years.


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Max overbore on a 235?
Dusty #1150834 Thu Feb 18 2016 05:18 PM
Joined: Feb 2004
Posts: 20,885
H
Boltergeist
Millions of stovebolt engines have run for decades with .060" and .080" overbores. When boring a block for a sleeve, it's common to bore the cylinder 3/16"(0.1875") or 1/4"(0.250") oversize without hitting water, but an overbore that size would not be suitable to run a piston in. I have sleeved hundreds of cylinders without any issues, so it's possible to salvage a worn or damaged block as long as there are no cracks or holes in the cylinder wall in the top or bottom 1/2" to 3/4" of the cylinder.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Max overbore on a 235?
Hotrod Lincoln #1150847 Thu Feb 18 2016 06:07 PM
Joined: Mar 2005
Posts: 1,437
C
Shop Shark
Originally Posted by Hotrod Lincoln
Millions of stovebolt engines have run for decades with .060" and .080" overbores.


Mine's one of them (.080"). I will confess that before the rings seated it ran hot enough to make me nervous but settled down after break in.









1952 1300 Canadian 1/2 ton restomod

Photobucket

You Tube

Re: Max overbore on a 235?
Dusty #1254912 Wed Feb 14 2018 01:17 AM
Joined: Sep 2009
Posts: 14
M
New Guy
Just following up on this topic. I was talking to the machinist that is boring my 235. It is currently at .030 over and now he doesn't think that it will clean up at .040 over so it would have to go up to .060. Has anyone noticed a power loss due to boring it that much? Would I get more power out of it by putting sleeves in it? I plan on running a cam from Patrick's in it with dual exhaust, 2 carbs, and HEI ignition.


1954 Chevy 3100
Re: Max overbore on a 235?
Dusty #1254916 Wed Feb 14 2018 01:53 AM
Joined: Dec 2017
Posts: 796
D
Shop Shark
You will be fine at 60. I would even go .080 if need be but not more then that. But at .060 you can find pistons and rings so good to go.


Mike
Page 1 of 2 1 2

Moderated by  Woogeroo 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.4