Valvespring at 7000 RPM

Nascar engine from 7 years ago. 7000rpm with a .700 cam lift.

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High Perfomance valve spring testing 10K RPM
PAC Racing Springs in-house dynamics testing, utilizing a high performance SpinTron tester. This video shows a Nascar style performance dual spring. This spring shows good dynamic behavior even at 10,000 RPMs. The visual analysis is a useful tool to detect dynamic behavior of valvetrain components at extreme engine RPMs.





Overhead Cam at 14K RPM
This video shows an operational cutaway of a BMW S1000RR — a 193HP superbike — bumping against its 14,200RPM redline. A cam and valvetrain at 118 cycles per second is an amazing sight (and sound)





Inside a V8 at 1000RPM
Partially rebuilt GM Holden HQ 253ci (4.2L) V8 being tested for oil pressure. No valve gear or heads, but lifters sitting in place above the camshaft. Built for learning / enjoyment only, not my usual profession, so I don't claim to be an expert :-)





Upgrading Valve Springs Jay's Tech Tips #23
We're back today with a new Tech Tip from Jay as he explains what we need to know about valve springs!




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