Quote:
Originally Posted by gofastman
LMAO! that was funny but theres no need to get worked up. I have never heard of any one overpowering a 4G63 block, my understanding was that generaly iron blocks dont need to be sleved, but I have limited knowlege on the subject.
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Depends. Honda F22 blocks (accords and some ludes) are iron blocks but still crack sleeves w/ some big power. It's because of the open deck design though, not the material. The open deck blocks weren't designed for 400, 500, 600+ hp. The problems is that the actual sleeves get too much movment and distortion because of the little (no) support that they have on the sides. They're only attached at the bottom of the sleeve leaving the top open. The closed deck engines (4g63's) don't have this problem because the closed cooling jacket (sleeves attached to the block at the bottom AND the top of the sleeve) gives added support where it needs it.... At the top. This is why the higher HP 4g's don't have this problem, because of the added strength and the sleeves not moving and distorting. Now, it would be a different story if the stock 4g sleeves were cracking from shear pressure (an assload of boost), but that's not the case here. Just a little write up incase anyone that has read, or is reading this thread is confused at all.