What size 3.4L Supersix exhaust and intake valves

[camaro_dakota]

Anyone know what size the bigger valves supersix uses in the 3.4L heads are? i have heads and i was interrested in gettin bigger valves. I know that Si makes valves but i dont think they are bigger but rather just stainless. Let me know if you have any info.
Thanks in advance,
Dakota
Ok i downloaded the catalog and saw that they are 1.80.... ok so anyone know where i can get them or if i can buy just the valves from supersix?

[ September 16, 2003: Message edited by: camaro_dakota ]</p>

[StudlyCamaro]

the si valves are larger than stock valves ;)

[viper98885]

I have done a lot of research on this and I really don't think that you'll gain too much out of those bigger valves. Tiago and I were in agreement on this about a year ago and I don't know where he stands now, but I would imagine that he feel the same as I do.

[StudlyCamaro]

i dont think that there would much advantage to the intake , but look at the stock exhaust and the si exhaust valves.. the stock valve looks like it would be a lot more restrictive than the si valve, but i have no actual #'s to prove anything.. so take my advice with a grain of salt

[Tiago]

<blockquote>quote:</font><hr>Originally posted by viper98885:
I have done a lot of research on this and I really don't think that you'll gain too much out of those bigger valves. Tiago and I were in agreement on this about a year ago and I don't know where he stands now, but I would imagine that he feel the same as I do.<hr></blockquote>


[img]graemlins/thumbsup.gif[/img]

[slacker69]

the intake valves they use are a 1.8 i didnt know they put in larger exshuast valves

You can just order the valves from Manley direct

[ September 17, 2003: Message edited by: slacker69 ]</p>

[KBeezy]

Its all about the flow. From the research I have done there is a 20% increase across the board for intake flow and 14% increase across the board for exhaust flow. [img]graemlins/thumbsup.gif[/img]


its all about the flow if you ask me. It DEFINATELY cannot hurt!

[Tiago]

<blockquote>quote:</font><hr>Originally posted by KBeezy:
Its all about the flow. From the research I have done there is a 20% increase across the board for intake flow and 14% increase across the board for exhaust flow. [img]graemlins/thumbsup.gif[/img]


its all about the flow if you ask me. It DEFINATELY cannot hurt!<hr></blockquote>


trust me you barely change any flow numbers.

[mattsv6]

you lose what you gain with a larger valve in the cast iron 3.4 heads. if you run a larger valve in a small chamber, it put the valve closer too the walls of the chamber. and you lose any good flow that was there with a stock valve. i think this is just wasted money!!! [img]graemlins/thumbsdown.gif[/img]

[StudlyCamaro]

<blockquote>quote:</font><hr>Originally posted by mattsv6:
if you run a larger valve in a small chamber, it put the valve closer too the walls of the chamber. <hr></blockquote>
w3rd.. the combustion chambers are tiny to begin with

now getting a custom valve made with the same diameter.. we may be on to something

[camaro_dakota]

thanks much for the info guys you hooked me up when i needed it. Im glad i got some responses a big [img]graemlins/thumbsup.gif[/img] to you all for helping me out i really appreciate it... and it saves me money :D
Thanks again,
Dakota

[merlinsrealm]

<blockquote>quote:</font><hr>Originally posted by Tiago:



trust me you barely change any flow numbers.<hr></blockquote>\\

I dont know if there is a difference between the 3.4 and 3.8 heads.....what I do know is there is a 10 cfm difference when using bigger valves on a 3.8 head....