Miata Turbo Forum - Boost cars, acquire cats. - VVT cam gear failure, the next steps?

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- - VVT cam gear failure, the next steps? (https://www.miataturbo.net/engine-performance-56/vvt-cam-gear-failure-next-steps-84017/)

twpipe

Apr 20, 2015 12:27 PM

VVT cam gear failure, the next steps?

6 Attachment(s)

vvt 2001 run in on the track for couple years. appears intake cam gear exploded after first lap at Buttonwillow. no bad noises and no abuse since engine was built. Debating if VVT controller had anything to do with failure. Engine limited to 7200 rpm and no special abuse that day. I don't find any available aftermarket gear available so just back to stock?

EErockMiata

Apr 20, 2015 06:32 PM

Quote:

Originally Posted by twpipe (Post 1224907)

back to stock with 7k rpm redline.

twpipe

Apr 20, 2015 06:55 PM

I'm a long way from stock. Could be the hp, very light flywheel, AEM EMS, or rpm. Belt ripped lengthwise and across, so unlikely belt. One of the suppliers I called said it was his second call today on this item..... Dealer price is $ 660 and my race discount isnt up to date so I bought a used one. Actuator and gear only come together.

curly

Apr 20, 2015 08:52 PM

Wow, that's a new one. Can you upload some bigger pictures? Or am I the only one seeing tiny pics.

I'd install a Gates Racing belt, a new OEM sprocket, and make sure everything is actually torqued correctly.

y8s	Apr 20, 2015 10:11 PM

"engine was built" you say? Was this part touched?

twpipe

Apr 20, 2015 10:35 PM

4 Attachment(s)

The cam's were not modified, Low compression pistons, race seals and bearings, billet oil pump.

Twibs415

Apr 21, 2015 01:37 AM

what valve springs?

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