Hey,

I have a recently built VQ35DE with the power goal of 600HP

• 2x Garret 2860RS
• Aiming at 17 PSI MAX

Bottom is a cosworth short block with the included parts:

• Cosworth Forged Pistons (95.5mm)
• Cosworth Forged H Beam Connecting Rods
• New Nissan Forged Crankshaft (81.4mm) v
• Cosworth High performance Rod and Main Bearings
• Cosworth High Performance Main Bearing studs

Now everything else is stock, including valve springs.
Does anyone know where can I find more information about the stock spring rate?
I am using LINK ECU and concerned about valve float due to the use of ignition cut/hard cut rev limiter with that stock top.
I'd be fine with 7000 RPM as the limit if that changes anything.

Thanks,