well guy's i'm looking at picking a head up for a guy that has fully built it already. now it has TI crower valves. i will be boosting my motor so i need to know whats all going to need looking into. can they take the heat? how about wear? should these really be used in a FI setup like mine? i searched and i couldn't find any real solid advice. i'm also worried about valve seats and the TI valves wear in the valve guides.... someone enlighten me on this please

 

Assuming thats means titanium, solid titanium hates heat and slightly deforms, which is why its hard to machine. Titanium is lighter than steel pound for pound, but when its the same size as a similar part in steel, its only a little stronger. Titanium also disapated heat terribly vs steel; the reason you see sodium-filled valves on Ferarris and indy cars is because the material disapates heat well, not just because its lighter (adds no strength).

IMO SS valves are known to work, and sodium-filled valves are better if you can get them. But what do I know, metalurgy usually takes a back seat when it comes to aftermarket know-it-all.

 

yeah sodium filled valves have been around for along time

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">Titanium is lighter than steel pound for pound</TD></TR></TABLE>
Pound for pound it would weigh the same
sorry lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">
Pound for pound it would weigh the same
sorry lol</TD></TR></TABLE>

lol, I meant given the same volume its a tad stronger I was altering that sentance and overlooked that. If in doubt, look at Ti retainers - lighter, a little stronger, but also fatigue much quicker.

 

thank you for ur help on this guys. now my next question is how strong are stock keepers? do they ever need to be upgraded? also the valve seals where just replaced. i'll pick up some crower ss valves and i would like to know if it's better replace the seals again or not???

 

also the valve springs are orange??? what the hell are they??? anyone know?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">IMO SS valves are known to work, and sodium-filled valves are better if you can get them. But what do I know, metalurgy usually takes a back seat when it comes to aftermarket know-it-all.</TD></TR></TABLE>

I found this article regarding a blown engine due to old sodium filled valves commonly failing: http://www.80tq.com/EngineDamage.html

Thoughts?