06-10-2011, 07:59 AM #1
which pistons work best with what valve train upgrade?
i have heard alot of good things about the riva pistons!
i also read that some pistons will touch the valves if you upgrade the valve train!
i know some guys use the JE PISTONS. what are the pros and cons?
i know some guys use the CP PISTONS. what are the pros and cons
i know some guys use the RIVA PISTONS. what are the pros and cons.
and which valve train work best with each of these pistons. either riva or r&d?
i will be using the aftermarket rods with the pistons as well.
06-10-2011, 08:27 AM #2
I went Riva pistons and Riva valve upgrade paired with Carrillo rods, Riva outsourced the crank balance. Bore scoped at 10 hrs after rebuild - piston tops were pristine and I broke it in pretty hard.
06-10-2011, 08:46 AM #3
And I would imagine RIVA outsourced the pistons as well.. When it comes to pistons, most companies metallurgy is almost identical (2618 for forged).. What it comes down to is the dimensions. There's a bit that goes into a piston, but I would imagine most would be very very similar.
Quench, squish, piston deck thickness, Compression Height, etc are little variables. If your using a stock rod, your pretty much set with a compression height. I haven't done the math on a 1.8L(just picked it up 2 weeks ago), but most of my experience is from custom ordering pistons for high boost turbocharged small block fords(1200+HP), with custom crank and rod packages.
06-10-2011, 08:53 AM #4
06-10-2011, 10:25 AM #5
Rius racing has there own design of CP Piston that have a much deeper valve pockets. I have been using these pistons in engines I build for customers. They are more expencive than other piston sets. They come with rings and Heavy duty wrist pins. They have been proven in yamaha turbo engines making over 500 HP.
06-10-2011, 12:54 PM #6
- Join Date
- Sep 2007
- Gainesville, VA
I can't comment on CP pistons specific for Jet skis, but I've used CP pistons in all of my Drag cars, making 1000hp and they are stout. CP was started by engineers that used to work at JE. I would highly recommend any piston that CP makes/sells. I never had an issue with them. Manley or Carillo rods for Forged H/I beam. I wonder if anyone makes Aluminum rods for the SHO motors since most who do rebuilds spin to 8700-9000 rpms or more.
+1 for CP!!
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