Quote:
Originally Posted by R3b
I spent about 1.6k for my machine work from a really good shop and did the assembly myself, would be another couple hundred for them to do the long block. So figure out all the parts you and another 1.5-2k for full assembly motor with line hone, boreing, block hot tank/deck, crank polished, bearings cleared for block/crank, head decked, new valve guides, cleaning, dis/reassembly, and correct cam clearance.
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The difference here is that you had a KA built, which is cast iron and thicker than an SR20. When sleeving an SR every measurement in the block gets distorted, so instead of a simple hone (cheap process), you now have to re-size everything (much more expensive and labor intensive). A sleeved SR also has to be CNC milled to accept sleeves which again is a high cost process. Once you sleeve a block it also requires a unique decking process know as step-decking since you cant run a linear surfacer over the cast sleeves and aluminum block (this another CNC process.) Now comes the question of why sleeve, well you don't have to, if you stay stock bore size and run no timing. The SR is thin and gets hot, it warps and starts destroying itself when you force it to make power, that's why cast iron sleeves are used. That's why building a 500hp SR costs much more than a cast iron block like the KA's or 4G63's.