Whats the biggest Valve size i can go?

[GoLfMan]

im taking a pre emissions 8v head into work to do some work on it.

whats the biggest valves i can go for a 1600 head, it will also be sporting a grumpy cam but yet to decide on the specs.

[gldgti]

I think...

maybe 38mm intake and 36mm exhaust.

i think.

that would give you 38+36 = 74mm, and the bore on the 1600 is what? 79mm? something like that?

[GoLfMan]

so what the general formula?

[ontarv]

i've 40.5 and 36 in mine



they just fit

[Jmac]

Geez thats a squeeze man cool!!!!
Jmac

[GoLfMan]

i've 40.5 and 36 in mine



they just fit

that is AWESOME
cheers man you just gave me an idea

[Preen59]

that is AWESOME
cheers man you just gave me an idea

His exhaust valves would be bigger than your inlets, wouldn't they?

[GoLfMan]

His exhaust valves would be bigger than your inlets, wouldn't they?

at this present time yes LOL!

im aiming for 130hp i recon so i can compete with valvers

im also going to deck the head just a little to bring the comp up.

the 1.6 head can go on a 1.8 bottom end can it not?

[Preen59]

at this present time yes LOL!

im aiming for 130hp i recon so i can compete with valvers

Thought so.

130hp? That's easy.

[GoLfMan]

Thought so.

130hp? That's easy.

really !!!!

the 1.6 head can fit on a 1.8 bottom end cant it? what hp should i be aiming for then?

should mention that im going to deck the head to raise comp JUST A TAD