bore limits of blocks???

what is the max bore limits of the different 2.2 blocks ? I have several different year blocks that need boring but I can not find any info on the safe limits. any help on this would most helpful.

i dunno.. i recently had mine bored .20 over.. i have a 90 tII block..

someone should know

[GLHS0658]

I read in the Mopar 2.2 FWD book...10 year old version

.040 overbore maximum

It did not specify different blocks though
T1/T2/common blocks

[rusty26]

donovan's site says it is ok to resleeve the block as long as the machine shop uses the proper sleeve. check with him to see if he does the service.

I would hate to have sleeves put in. I have one block that the piston has .75 on the top and one that has1.0 stamped on top. they both need to be bored, are they useless?

[spoolboy]

It depends on how much core shift your block has.

In general, less is more here. Too much overbore makes the block really thin between the cylinders and leads to cracks if used for racing.

With the right block, an overbore in excess of .060" is possible, but I wouldn't do it unless I wasn't going to run the engine hard or maybe run it naturally aspirated. You have to have the block measured for core shift (usually sonically) before you try anything over .040". You can probably buy another whole rebuildable engine from a salvage yard for the price of re-sleeving your block.

I remember some engines in an old Mopar book that displaced over 2.3 liters....

my machine shop was able to work with this

The newer editon MOPAR 2.2/2.5 books ays .039" or 1mm, is the maximum allowable overbore. Although MOPAR recommends limiting it to .030" maximum and .020" preferred. You're not going to gain tremendous amounts of hp going to the maximum anyway. You should only have the cylinders bored enough to remove abnormalities. Mine were bored 20 over, just what was needed and that was it.

[shadowdude]

i had to have my 91 2.5 common block bore to .040 because it was rebuilt once and bore to .030 .i talk with nurmeruose people including Mike demoss from FWM and he says that .040 is pretty much the limit for reliablity!seeing that the dude has done crap loads of rebuilds i say that would definatly be the limit,.040 with a torqu plate that is!