Xsi head tuning.

[Bedford126]

Will be running the head on my standard vtr bottom end. So is there anything worth doing to the head before its fitted? Like larger valves/springs/ect.... any advice would be good.

I am running a "port and polished" xsi head at the min but I'm not sure it was done by some one who knows what they were doing.

Any advice is welcome.

[SnakeVTR]

This is something i have been looking into aswell. Im sure you could get a better camshaft for that head and if you can get stiffer springs for that head then i would, i understand the XSI head already has a decent cam from standard but im sure you would benefit from something a bit more lairy.

Also i would'nt go for larger valves as this can mess up the flow or VE, big valve conversions are more for turbo charged engines were the oe valves are actually bottle-necking the airflow into the cylinder.

And get the head professionally ported and polished and flow bench/ tested if your going to the effort of tuning the head

[Sophia_Bush]

Port match both inlet and exhaust de shroud basics shouod be ok