Max Rev limit with stock vavle springs?

[syn52k]

I am looking to spin my motor a little higher. I have a m20b25 that i currently spin to 6800K at 17 PSI with mega squirt on a stock cam. I had recently sourced a brand new IE 272 cam that i am going to put in but thought about upgrading the springs while i am in there.
Anyone have any recommendations or thoughts on stock valves with a 272 with forced induction? what is the highest i can spin with that setup? Should i upgrade my springs and if i do with a 272 what is the highest i can spin at? not sure if it matters much but i have a 3.73 rear.
Thanks!

[moatilliatta]

I don’t know the correct answer.

But, stock I wouldn’t go past 7K, and consider a softer limiter.

2nd, once the valve springs are done, you’re looking at doing the rockers too.

3rd, is what’s the dyno chart looking like, is it worth it?

[syn52k]

I forgot to mention i have new IE rocker arms with the cam as well that will go in while doing the install. As far as dyno is sort the reasoning for the question.