Brian Crower Valve Spring Question

[theinteriorautomechanic]

Hi all I'm in the process of building my Yaris currently. Currently I am going all motor. I have done the following: AEM CAI, Weapon R Header, Tooter Intake Runner Extender, 2AZ throttle body, port matched intake manifold, 1ZZ injectors, and FTG Tuning Reflashed ECU with higher redline.

My question is with the increased rpms and (hopefully) more horsepower should I consider upgrading to Brian Crower Titanium Valve Springs and Retainers or will stock springs be ok? I'm planning on doing autocross and track days with it so dependability is super important.

[Turbiini]

i had valve float about 7000rpm na and 6800 with turbo.

[lani100]

Stronger springs are a must for reliability especially at higher rpm

[mitch9521]

Pretty much a mandatory upgrade if you plan on spinning it over 7 grand.

[remcafee]

also leave the stock crank pulley on if youre reving that high, lightened pulley will disintegrate

[Cletus Garfunkle]

I would only think about springs if I put a cam in the car. New springs and retainers could never hurt probably increase reliability a lil bit. I've never or don't think I've ever had problems spinning to 8k with stock springs or rods beating the sh!t outta it for 6 months. Have you thought about porting the head if you were to go through all the trouble to change springs? This is my personal opinion ofc. If you want to spend the time and money go for it learn something new in the process make it more reliable what's wrong with that!