Page:
Home > Help Needed / General Tech Chat > safe overbore?

ed-moss

User Avatar

50 Posts
Member #: 7192
Advanced Member

bradford

6th Mar, 2011 at 08:07:24pm

i have a 1275 +20 over bored block (1293) im going to be boring it again.

whats the safe maximum that a block can be bored on a fast road/weekend worrior engine?

does anyone do a +30 decent turbo piston, or would i have to go to +40?

thanks in advance. ed

ask me tomorrow for discount

apbellamy

User Avatar

16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

6th Mar, 2011 at 08:09:03pm

73.5mm for 1380 is the max.

Next size up is usually + 0.040

Edited by apbellamy on 6th Mar, 2011.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

Rod S

User Avatar

5988 Posts
Member #: 2024
Formally Retired

Rural Suffolk

7th Mar, 2011 at 07:48:57am

Get your machine shop to check first that you don't have one of the blocks that were sleeved (linered) at the factory.

Lots of the A plus ones were.

Rebore limits are a lot lower on the liners (or they have to be taken out completely and new ones fitted).

Schrödinger's cat - so which one am I ???
Home > Help Needed / General Tech Chat > safe overbore?
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: