Oversized Vavles

[spooledup]

im lookin for 1.5mm oversized valves for an rb25 head anyone know where to get titaniun vavles??? and will i have enough piston to valve clearance if i use standard length valves and the tomei 2.8L stroker???

[bigmikespec]

Yes and maybe. Hope you got deep pockets, not only won't they last long but you are looking at $300 each for a valve.

[JKR-32]

Yes and maybe. Hope you got deep pockets, not only won't they last long but you are looking at $300 each for a valve.

f*ken ouch!

[spooledup]

im not worried about the funding... im pretty sure ive found sumwhere to get em from... just hoping this build will work. 2.8L stroker, 260 duration 10.5mm lift, 1.5mm oversized valves... twin 35/40s and a comap ratio of about 8.4:1

[N1GTR]

Hope you've got grip sorted out, youll need it.

I looked at getting oversized valves made up last year. Best bet is to send an RB26 one to whoever youre going to use, then tell them to work from that as a base. Once youve got them done, give them to your machinist with the rest of the motor and then he can cut valve reliefs while doing dummy assembly.

Why use Ti though?

[spooledup]

Hope you've got grip sorted out, youll need it.

I looked at getting oversized valves made up last year. Best bet is to send an RB26 one to whoever youre going to use, then tell them to work from that as a base. Once youve got them done, give them to your machinist with the rest of the motor and then he can cut valve reliefs while doing dummy assembly.

Why use Ti though?

im going for a big power build... something close to the HKS drag 33, i want it to hold together

[UWISSH!]

heaps of people are making big power like that without titanium valves tho

[N1GTR]

^^^Yeah thats what i was getting at.

Get some Naprec valves in there and spend the money somewhere else is my vote. Please keep us updated though sounds like an awesome project

[zebra]

Ti Valves will last 1500ks at best before they need to be thrown out and have the seats re cut.

[T04GTR]

titanium aftermarket valves are not the best for longevity. if you are after some exceldyne do alot of the nascar stuff. or you could try ferrea

[bigmikespec]

Ferrea are awesome and is what I got. Ti valve unless you want to rev to 10k and it to last a short period of time is the biggest waste of money. $300 each mate I have the quote if you want to see it, by the way there are 24 of them. Custom made from US same people that do the top NASCAR shit. Naprec is also no good.

Titanium is only weight saving you can rev it higher (less mech losses as valve train light).

Those cams are very short duration too for twin 3540s and lots of revs and power.

[hkssam]

guys wot you think about BC stainless over-sized valves ?

[zebra]

Titanium is only weight saving you can rev it higher (less mech losses as valve train light).

.

Not as big of an advantage in an RB being that the valve train is very light...well compared to a pushrod motor anyway

To the guy above...I heared mixed reports about the BC valves, some of them are just rebranded quality brands, some are of lesser quality