When to replace 918s
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When to replace 918s
I have a set of 918 valve springs on my car that have well over 20,000 miles on them and very many 1/4 miles trips (go to the track every weekend) When should you replce them i am going to pretty soon but i was just wondering.
#4
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Originally Posted by VINCE
What cam? Personally I would change them ASAP with 20k miles. I learned the hard way..
As Vince said, he learned the hard way. 918's should be changed out every 15K IMHO because while being a decent spring, they are a SINGLE spring, so if one breaks it's potentially fatal to the motor. Reason being, it doesn't have an inner/outter spring to hold the valve up in the event of a break...
918's are cheap dude, 100 bucks and 2 hrs of your time are worth it..
josh
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Originally Posted by White98Z
I have a set of 918 valve springs on my car that have well over 20,000 miles on them and very many 1/4 miles trips (go to the track every weekend) When should you replce them i am going to pretty soon but i was just wondering.
15K is a waste, IMO, for mild setups/rpms and mostly street use. It really all depends on the setup and useage though....
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15K is a waste, IMO, for mild setups/rpms and mostly street use. It really all depends on the setup and useage though....
JMO
Josh
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Originally Posted by Damian
Rebuilding your shortblock because of a broken spring/dropped valve is more of a waste. For 100 bucks and two hours of time, I do not see taking safety measures to keep your motor alive being a waste...
JMO
Josh
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Josh
I put my setup together without the intention of ever messing with springs again (at least not for a long, long time). That's why I chose a mildish cam, Ti retainers, stock valves, and no higher than 6300/6400rpm upshifts. Car sees no track time, all street miles. 50K should be no problem.