Hi everyone I am having Buschur Racing build me a new 2.4 lr block for my 04 evo. My previous block was a 2.4 with a oem 100mm crank manley I beam rods and manley 9:0 pistons. The new block will have a 10:1 compression ratio according to Buschur with I beam rods and manley pistons. I will be using the same head. My question is how much different will my tune be? Could I get away with the break in first 500 miles or so before I go get a new tune or would the added compression cause something to break?

 

Hmm this might be something I would ask buschur about they would probably be able to give you a better answer on this if you don't mind me asking what happened to your last built motor just give out or looking for more power ?

 

Thats kinda what i figured i will probably do is ask them. Yes the old motor gave out i broke #2 rod and it punched a hole in the block. not exactly sure what caused it to break.