Max bore for XPAG Block

[alan]

Planning to build up a 1466cc XPAG for my TC4372. Have spare "bannana" bock, and have read this will take TF 1500 sleeves and pistons. However before proceeding I would value any comments as I do not want to ruin a good block. I also will use TF valves, hard seats, Edney cam and Morris 10 head, front and rear seal conversions, and 1 1/2" H4 SU carbs.

[alan]

Hello,
can anyone give me feedback on their experiences in sleeving out an XPAG block to MG TF 1500 size? I have the parts, I'm ready to go, but I dn't want to make any mistakes!

[Steve Simmons]

I've heard that some blocks accept it better than others. It may be worth doing a thickness test on each cylinder wall to make sure you don't punch through. Also be sure to use stepped sleeves.

[Tom Lange, MGT Repair]

IN GENERAL, it is usually OK to open an XPAG up to +.100, without problems. I have an engine that has been done to +.120", without sleeves (it must be VERY thin...).

But even if you do break through into a water jacket, it's not the worst thing in the world. You may get slightly uneven cooling, but there should be no significant problem. Make sure you get a good machinist to install the sleeves; I like the kind with a lip, that can't move.

Tom Lange
MGT Repair