| Hope you get that block check out first before boring it out that wide. Most pro shops and good building shops will look through 10, 20 blocks to fine a good solid one that you could bore 0.30 over. Any machining to the bores for any high performance engine should be done with a torque plate installed and torque to specs. This will simulate any distortion of the bores from the cylinder head being torqued. A block may seem like a rigid piece, but is actually quite flexible. If the shop that is machining your block does not have torque plates, find a new shop, they are obviously not a performance orientated shop. When boring, you want the least amount of oversize that will get the engine to clear, do not think that boring it to the maximum size to get the most cubic inches will make more power. Thin cylinder walls flex more, loose ring seal and loose power. Make sure that the bores are machined in relation to the crankshaft centerline, this is something that machine shops rarely do unless you specifically ask for it. What this does is make sure that all the bore are the same in relation to the crankshaft centerline. The bore alignment has a large effect on where the piston is at certain camshaft positions. It's not good for performance if every piston reaches peak velocity at different cam lifts and the opening and closing of the valves are not all at the same pistons positions. The remaining metal will be removed in the honing process. Once you know for sure what the bore size will be, you can then get pistons of that size. As far as the GT28's. HKS GT 2835 is GT28 turbine with GT35 52 trim compressor. [ http://cherrypicker.tripod.com/turboupgradeforvg30dett/id4.html ] After all that, tune, tune and tune. :)
 STAGE V++++
Going to XV+ and beyond :) Yellow Z STAGE II
Going to XI+ |
22:46:56 09/16/03
