Quote:
Originally Posted by mattrobertsxn
THANK YOU FOR HELP
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1. Might as well do the oil pump if you tear it down that far.
2. Unless you have some crazy custom high compression pistons in it right now, there is no reason to get pistons that are lower compression than the factory pistons. You could even go up some as long as it is tuned appropriately and depending what fuel you're going to run. Since you already have aftermarket pistons I would keep those as long as they're serviceable.
3. A slipping clutch in of itself should not damage a transmission. Make sure you buy a clutch that is rated for more power/torque than you'll probably be making.
4. Springs and valves, that's really up to you. With a little research you'll find tons of KA's making 3-400+ on factory valvetrain with no apparent issues.
5. If no rod or main bearings were spun and no damage to the crankshaft, then there's no need to have the crank machined at all. You risk removing that hardened outer material of the crank journal and getting into the slightly softer stuff beneath. Best thing is have a trustworthy machine shop with a good background clean and inspect the crankshaft then go from there.
6. Again you should be able to reuse the crank, pistons, and rods if they are in good shape. Just need to re-ring the pistons with a new set of rings (Make sure to properly gap the rings for your piston/cylinder bore per the piston manufacturer's recommendation!) and a new set of bearings (also need to be measured properly, there should be markings on both the block and crank indicating the bearing tolerances for your specific engine, otherwise there's other methods for measuring bearing clearance). Also the piston wrist pin could potentially be replaced if it's worn.
7. As far as I know the best way to do the dual S13 exhaust cams is going to be with aftermarket adjustable cam gears. Doing it with the factory gear and compensating with the gear teeth is too inaccurate in my opinion and can leave you with some bent valves.
Additionally, look up WPC treatment. If you're going to invest the money in a full engine build, this treatment is very appealing for enhanced wear reduction and friction.