Strictly Performance ' The small valve talk for ls engine cylinder heads '

Sorry for the long video but in this video I talk about the ls1 engine and the valves you can switch to get every little piece of power

[HeadFlowInc]

Chamber shrouding of the larger valve.  You would need to port/modify the chamber to unshroud the valve to correct the issue.
One full point of compression i.e. 9.00-1 vs 10.00-1 equals roughly 8% power increase/decrease  JD

[dalethomas]

You need to do some research on valve curtain area and throat diameter/area and you will see whay the larger valve will flow more and make more power.

[utahcountypicazospage]

241 come on any ls1 99 and up they are better because of the way they are poured should have triangles at the end if one side

[shawnlibby]

I got 241 on 04 gto 5.7 I would like to have some wisdom to hop them up

[utahcountypicazospage]

You should run I with nothing changed but your valves

[impalaSSRealMechanic]

What are you trying telling me is that i can fit ls1 valve on my 862 truck head ?? 

[jqpublic]

So you are saying a 1.89 intake valve in a LS1 head will have increased flow and make more power? .Do you have any thing to  document this swap, like flowbench numbers or dyno results or E.T. at the strip ?

[Colt_R]

Oh man you really are wayyyy off!! Do some research bud. All you high end aftermarket heads have bigger valves for more air flow. Your logic is incorrect. They open up the valve seat on the head when using bigger valves. It’s real simple bigger valve(bigger hole) more air can come through.