16V Valves....

[totta Crolla]

(10-10-2015 02:52 AM)harkes Wrote:  So realistically there could be a whole 1-2 hp in choosing the right valves

Larger valves may be quite a different story.

[Jimmi The Kid]

I just disassemble my ported smallport head. I bought it long time ago really cheap, now I know why

The inlet valves are pretty much as new, nice and shiny. But the exhaust valves are worn out and the edges are sharp, because they are grinded down.

If I fit 7MGTE valves, will these require bigger seats?

[oldeskewltoy]

(01-14-2018 05:43 PM)Jimmi The Kid Wrote:  I just disassemble my ported smallport head. I bought it long time ago really cheap, now I know why

The inlet valves are pretty much as new, nice and shiny. But the exhaust valves are worn out and the edges are sharp, because they are grinded down.

If I fit 7MGTE valves, will these require bigger seats?

To know for sure.... check with a machine shop.

[corolla4agze]

Hi is there any bigger valves aveilible no more that "fit" stock seats. atlantic size is quite big to hi power turbo use. MRP had 0.5mm bigger stainless but not aveilible no more. Have been looking options.

[oldeskewltoy]

(09-22-2022 10:31 AM)corolla4agze Wrote:  Hi is there any bigger valves aveilible no more that "fit" stock seats. atlantic size is quite big to hi power turbo use. MRP had 0.5mm bigger stainless but not aveilible no more. Have been looking options.

16V valves.....
largest you can fit on a stock seat is 31mm intake, and 26mm exhaust. Any larger - especially on the exhaust side could prove to be an issue... if the exhaust seat gets too thin, the seat could possible fall out

As far as getting those sizes... Google search custom motorcycle valves


hope this helps......

[corolla4agze]

whit turbo engine the exhaust is weak point. Need look up some shops if just swap the "atlantic" size valves and seats. intake side will flow whit Boost, the ex is not that good

there is lot option in "atlantic" size on valves but the seat install is not cheap here near me.