07-17-2012, 02:18 AM #1
Advice On Revving Stock Rods Too 9000rpm
Guys when do you switch over to Carrillo rods is it RPM issues or Boost issues.
Let say i want to rev my 4 Tech to 8900-9000rpm with a rev limiter at 9100rpm on stock rods with boost levels 14-16psi.
Can the OEM rods handle this.
07-17-2012, 02:55 AM #2
07-17-2012, 03:00 AM #3
07-17-2012, 03:38 AM #4
combination bends both
But is there a limit where things can run and can t run before upgrading rods...
07-17-2012, 04:46 AM #5
i have a similar question along the same lines if someone can help.
i have a 2012 rxpx with V-Tech stage 3 tune, and a 8800rpm limit.
the ski at WOT revs 86-8700 rpm which is fine.
however when it comes unhooked it momentarily peaks at 9200 approx (recorded on the Seadoo dash computer that records peak speed/rpm).
Is this ok?
07-17-2012, 07:12 AM #6
I'm running stock rods with a 9,200 limiter, and unhook 20Psi boost, and no issues with them. Have 80 + hrs so far @ 9.200 and turbo.
07-17-2012, 07:32 AM #7
07-17-2012, 11:09 AM #8
the thing that usually goes at high boost (25+psi) on any motor is rod bolts...this is usually associated with turbos since peak trq hits hard and fast. biggest problem with higher rpms is floating a valve.
07-18-2012, 04:02 AM #9
Running big boost you need to have the tune well sorted, the rods won't be as forgiving of detonation at big boost as they are at low boost levels, but with the right tune, rods will handle the boost. If an engine with big boost bends a rod you can always put it back to something like detonation.
Another way to think of it is, As long as that crank journal is not trying to push up while the rod is trying to push down, rod won't bend, (unless RPM are involved) this comes down to tune.
07-18-2012, 06:05 PM #10
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