Valve sizes?

[MAXIBOY]

megane are 33mm that,s what i,ve got.

[BenR]

ex all the same.

16v in 30.7mm
willy in 31.7mm
meg in 33mm

[MAXIBOY]

cheers ben. i was wrong again. i thought willy,s and megane were the same. sorry for the confusion

[BenR]

no worries.

[DaveH]

Slightly off topic but if you were to, for instance build a big valve, gas flowed williams head, what size valves would you use- 33mm?

[MAXIBOY]

could be wrong again but i think you can go 34 or 34.5mm

[BenR]

I've got 35mm custom valves, but it takes a SERIOUS amount of work for each port to get the valve size to work. About one evening PER inlet port.

= not cheap.

for a daily drive the willy oe megane valves are more than fine.

[number1]

might need to get the slightly more accurate verniers out lol

Dave

[DaveH]

I've got 35mm custom valves, but it takes a SERIOUS amount of work for each port to get the valve size to work. About one evening PER inlet port.

= not cheap.

for a daily drive the willy oe megane valves are more than fine.

So would a willy head with 33mm inlet valves give a noticeable gain over standard and not need too much work?

[BenR]

appropriately modified yes, but a well modified stock valve sized willy head is perfectly good.