top end kit for vipers

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whatryan

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Jan 31, 2008
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iowa
when should a u put a new top end kit in vipers i got 2100 miles on it and its still never been touch should i just do it to be on the save side the thing runs great just looking for some opinions
 
IMHO, 2100 is way to low to even worry about any topend work on a Viper. Not saying you'll have the same result, but I didn't replace pistons in my 02 until 9500 miles. Cylinders were perfect and pistons had minimal wear. Most will say I was crazy LOL, and they'd be right!! Pull a compression and leakdown test. Those will give you a good idea where you are as far as whats's needed. I've run Amsoil Interceptor since the second tank of oil. Seafoam every trip and at the end of the season. Hope this helped ya'.
 
Your good for now, when you hit 3-4,000 then she's time for OEM rings IF you want to keep peak performance and efficiency,you will have blow by by then.
 
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I've got 12,800km's and still perfect compression and runs strong. Thinking i might re-ring this summer but don't wanna touch something thats not broken!!
 
Yamasquaw said:
I've got 12,800km's and still perfect compression and runs strong. Thinking i might re-ring this summer but don't wanna touch something thats not broken!!
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thats what can get one in trouble. :)
 
whatryan said:
when should a u put a new top end kit in vipers i got 2100 miles on it and its still never been touch should i just do it to be on the save side the thing runs great just looking for some opinions
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Since you're looking for opinions, and at the risk of starting some good hearted debate; depending on the oil you're using, you're way too early for a re-ring.

IMHO - if you're using a high quality syn. oil with a chrome bore, you should have no problems going 6-8k without any measureable drop in performance or worry of catastophic failure due to excessive clearances.

Proper warm up and summerization as qualifiers.
 
I put in new rings at 3200 miles because I broke a stud on the cylinder when adjusting power valves (the previous owner must not have heard about these things called covers when trailering it). The cylinders were still cross hatched and everything looked great.
The question I have about compression checks, either differential or standard is can they be accurate with power valves?
I was told they give you a good idea but you don't know if the pressure is going through the power valve or the ring.
 
md11freighter said:
The question I have about compression checks, either differential or standard is can they be accurate with power valves?
I was told they give you a good idea but you don't know if the pressure is going through the power valve or the ring.
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All the power valve does is drop the top of the exhaust port at lower rpm's. The rings go past that point and the valve is no longer in play. Compression should be measured the same. You are looking for differential within 10% (5% or less is optimal). That said PV motors are as standard as non-PV motors on compression checks.
 
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