Why not sleeve cylinders to 4in use sbc pistons and stock 258 crank , it comes out to 4.812l and you avoid the expensive custom crank,pistons, and compression problems of the dino recipe 4.8
OlllllllO wrote:Ok this Has surely been asked but i cant find it
Why not sleeve cylinders to 4in use sbc pistons and stock 258 crank , it comes out to 4.812l and you avoid the expensive custom crank,pistons, and compression problems of the dino recipe 4.8
your thoughts?
Sleeving six cylinders costs a pretty penny so there's no such thing as a low buck 4.8. The alternative is to go for +0.060" pistons and a custom crank with a longer stroke than the standard 3.895" but that's also expensive.
Another option to consider is going .100 over 3.975 bore.
Although the 4.75 that this combination will give you won't get you to your magic 4.8 number, it'll be a lot less expensive to get you to a 290CI engine.
This is a popular build combination for my race Strokers without having to go to the expense of sleeving cylinders.
I just finished my 292 ci stroker. 060 overbore, scat 4 counterweight crank offset ground to 2 inch rod journals(now weighs 45lbs) which equals a 4 inch stroke. Machine shop charged $275 to offset grind and balance it a few years ago. Used chevy 250 6 inch connecting rods and .927 wrist pins and custom .927 pistons from autotec. Block was a big pain to get rod bolts to clear. I had to file webbing down on every cylinder. oil pan also needed to be hammered out majorly to get the girdle to not hit and this is with a thick one piece oil pan gasket. Yes the connecting rod to side of crank journals are .01 too much play but with the engine running and full floating pistons you can't here a thing and oil pressure is superb with a stock size oil pump(no reason it would not be). Heck of alot of work to go through but it's an option.
Here's a place not extremely far from me but I know nothing about them. Nice list of prices if it's up to date. $195 to offset grind, 150 to balance. I would have thought balancing would have been about 3 Times cheaper. $80 a cylinder to resleeve. http://www.rcgcncblocks.com/SERVICES.htm