vt3.8lt wrote:have decided to just get those manley ones and have them resized to what i need thanks eveyone for your help hopfully i can get this build finnished up and get this thing back on the road
They are about the heaviest valve available for the V6. ZZP ones are a bit lighter and also offer a not so massive exhaust valve which may stave off vsr better, can't remember the exact difference in weight sorry. You'll also need new valve guides as the stem is a bit narrower than stock. I've never had one of these valves give up though which is why I like to use em on anything good
Ah ok the weight im not really concerned about with the lift and duration of my cam it wont hurt them to be a bit heavier but i got a hold of sicsix and hes gonna see what he has available for me to use with this thing i did notice that the stems needed to be replaced if i have to go in that direction it probably wouldn't hurt anyway with the rest of the parts ive put in this thing a few guides wont really hurt hopefully i can find somethong otherwise it will be those ones or some custom made manley ones but they will take 4weeks to make
vt3.8lt wrote:the zzp valves would be good but are way to expencive and the intence racing ones would be good but from my measurements are to big ??? so im still stuck without valves for this build atm i might have to get some made perhaps but i would prefer not to have to
That $64.99 price tag was for a set of six you do realise ?
They are SI brand valves, which I bought a set for my super6 heads. The only concern for you is they say something about not being suitable for Turbo applications. Not sure why this is as they are Stainless valves. Best option is probably the Manley Severe Duty Stainless Valves from Intense Racing. You will probably need to get your valve guides sleeved anyway with bronze guides.
ok i thought that was for just one but if there no good for boost then there no good to me anyway i probably will go the manley ones if sicsix hasent got anything on hand for me to use im just waiting for him to get back to me tomorrow
vt3.8lt wrote:ok i thought that was for just one but if there no good for boost then there no good to me anyway i probably will go the manley ones if sicsix hasent got anything on hand for me to use im just waiting for him to get back to me tomorrow
Yeah it's odd cause they sell them for Boosted Supercharged V6's, but then say not suitable for Turbo Applications
I don't know actually. I was thinking maybe that because the exhaust flow of a turbo has to push the turbine wheel around there is some extra heat from back pressure ?
Or maybe I am way off.
OZ38 wrote:I don't know actually. I was thinking maybe that because the exhaust flow of a turbo has to push the turbine wheel around there is some extra heat from back pressure ?
Or maybe I am way off.
Cheers
That sounds right to me. Pressure and temp are proportional to each other. Law of thermodynamics.
I thought it would have something to do with the extreme heat but as vlad stated they influence each other ill find out what valves sicsix uses tomorrow hopefully they'll be suited to whst im looking for if not custom super duty manley ones it will be
I spoke with the guy from sicsix performance today and he has a set of oversized manley stainless valves there i have decided to use so that sortes that thanks for the help guys it has been an interesting discussion
