I'm going to rebuild my ITR engine and get race head work from Alaniz to run on street/track with stock cams and 9100 rev limit.
Now that i have valve train off i wonder to upgrade valve springs with a new Toda set that i can have for free, or else keep my old stock ITR springs with 85.000 hard miles on.
Will the incresed spring pressure of Todas absorbe consistent power and be overkill for stock cams, also if with extended rev limit?
What's safer to use Todas or the old stocks?


Modified by paulITR at 4:10 PM 11/21/2003

 

If you're planning on revving past the factory rev limit, then it's highly recommended you upgrade your valvetrain accordingly.

 

if you can get them for free....why are you posting this...go install some valvesprings

 

NEW itr valve spring are known to be safe until 9100-9200 rpm on stock cams.
Excessive spring pressure isn't good because it could wear faster rocker arms, cam lobes, timing belt and plus take off some hp on all the powerband.
But upgraded springs might avoid valve float at high rev (over 8000 rpm) and save from an overrev.
So the reason i ask for is because my ITR valve springs have a lot of miles on and i'm not shure of their efficiency.

 

back from the DEAD!!! im wondering if its is worth swappin out the itr valvetrain for toda springs when putting in toda A's..do the A's make enough power up top to rev past the stock redline with a just a mugen HG to bum the compression on an otherwise stock ITR motor(IHE)?????