Thread: Valves spring
11-06-2013, 06:12 AM #1
Good morning, I'm about to install the Vtech 8,375 rpm or 8,500 rpm but I have not clear when I change the valve springs to go absolutely secure.
Model: RXT 260 RS 2011
MODS: air filter 4 "SS Riva intake grate, catch can, Riva Gen 3 and pipes.
What I need (tell me if it is):
- Riva fuel pressure regulator?
- Valve springs?
- Vtech datalogger?
- O2 sensor?
-Solas prop or I can leave the stock prop?
Let's see if we clear entrre all necessary modifications for those who want to run between 8,375 rpm and 8,500 rpm.
P.D: I always run at sea
11-06-2013, 07:06 AM #2
If your rpms are going to surpass 8300 you need to, at minimum, upgrade to titanium retainers, then you are safe to 8500.
if you replace valve springs and retainers then you are safe up to 9000.
i just upgraded to Supertech valve springs and retainers.....
i would upgrade both springs and retainers if you plan on revving up to 8500, this is my opinion.
yes you should monitor AFR.
Yes you should data log
you out should verify your fuel pressure and install a FPR if your pressure is below 58 psi.
11-06-2013, 07:09 AM #3
11-06-2013, 07:49 AM #4
Don't spin stock valves over 8600. That's like sliding down a razor blade slippery slide using your balls as the brakes ...
11-06-2013, 08:55 AM #5
11-06-2013, 08:58 AM #6
11-06-2013, 09:09 AM #7
11-06-2013, 09:36 AM #8
why can't you spin stock valves past 8600? There are more than a few doing it. I have ran short bursts past 8600 on stock valvetrain although I risked my ski doing it.
11-06-2013, 09:39 AM #9
11-06-2013, 09:42 AM #10
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