1nzfe valve and valve springs

[fnkngrv]

Originally Posted by Jason@SportsCar

No way they are floating at 7000. We spent a lot of time tuning our car for the 2016 Runoffs at Mid-Ohio, and ran to 7800 with OE springs, no issues. In our Daytona motor last year we used the BC springs and ran to 9000, but as has been said we gave up VVTI control over 5000rpm because the pressure could not overcome the springs - going back to stock spring in that engine as well.

Peak power with my cams is around 7200-7500rpm, one engine has a regrind, the other has the 9.5mm Jun cams.

You need proper engine management.

^^^^^^This

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