CamaroRick

iTrader: (24)

I have the stock L92 valves in my heads, I am planning on swaping the lifters out and figured while I am in there I will look into installing titanium valves for added valvetrain stability. i basically have 2 questions. Will they hold up to the ocassional n2o 300 shot? and where are they available for purchase? i have read that the stock LS3's are a little lighter but they wont hold up to the spray.

stock = 106grams
hollow = 91grams
ti = ?

1.8t

I thought I read that while you can use TI valves on the intake side for F/I and Nitrous applications, that you are much better off going with a SS valve. I could swear I have read of some failures on the intake side of things with power adders like this regarding titanium valves from too much heat.

Hans Grüber

iTrader: (2)

I've been wondering about getting Ti valves for my L92 heads as well.

The only source I've found would be custom valves from Ferrea and thats $1000+ for just the intake valves alone.

Anyone know of a cheaper alternative?

AU N EGL

isnt the idea of using Ti intake and Sodium filled exhaust valves to run higher sustained rpms? 6600 to 7500 rpms.

Light valves, light wt springs and retainers reduces the likely hood of valve float.

with these light wt valves, IIRC you want to keep valves lift under .600 too

SS valves are still to heavy for high rpm use. but many ppl use SS valves to keep costs down.

Ti or Sodium filled valves are for NA applications, not FI or N2

Or something like that


I have them in my 243 heads

Robin L

We use Ti Valves in our 440" LSX engine. We spray about 500 shot. Because the valves are 6.300" long they are custom made.

They are about $100 each for the valves.

I would think that there are some valves that are close to the size of the LS3/L92 that could be cut down to save a little money.

We use Ti on Intake and Exhaust. We spin this close to 9000 RPM

Robin

Hans Grüber

iTrader: (2)

@ Robin L

What manufacturer did you use?

Robin L

I get them through Pro Power Parts in Fort Lauderdale Florida. I work with Dale Metlika.

I am not fond of the manufactuer. They were kind of arrogant when I talked to them at SEMA.

I just ordered another set of valves. They are for the GMPP Large Port LSX heads that I have. 2.250 and 1.600

Give Dale a call, he can help you out.

Robin

ddcarter

iTrader: (14)

Manley also makes Ti valves. Just bought a set for my LS7 heads. They are about eight hundred for the intakes.

1lejohn

iTrader: (9)

Ferrea also make valves for the L-92 LS3 heads. I ran the GM LS6 valves for years with no problems with N2O. I' m going to use the stock LS3 intakes they are lite and buy the exhausts , the stock ones are heavy. I posted the weights of the GM valves in another thread.

njc.corp

del-west?

Hans Grüber

iTrader: (2)

I presume that you bought your heads unassembled?

Would it now have been cheaper to get a set of the OEM Del-West valves from the dealer?

Can you post the weight of the valves?

Richard@WCCH

iTrader: (3)

Going with titanium intake valves can get real expensive for a number of reasons.
First, manufacturing titanium valves for the LS1,2 & L92 heads poses a real difficulty. The base design of the these valves leaves a very short tip length. As a result it's not possible to insert a hardened tip and there is not an adequate amount of room to install a lash cap. If you grow the valve tip length to .290" long then a hardened steel tip insert can be used. This doesn't solve all the problems however, because growing the tip length posses rocker geometry issues. The answer to correcting the rocker geometry is to machine and install a shaft rocker system whos assembled height can be adjusted to correct the geometry.
Titanium valves should recieve some type of coating to increase their wear life. Chromium nitrite, DLC or PVD coatings cost $. PVD coating for example costs approx $300.00 per set. On top of the $800.00 that makes for an expensive set of valves.
In short, stick with your stainless valves unless you're real serious about buzzing your engine.

Good luck,

Richard

CamaroRick

iTrader: (24)

i found this posted a while back

76TALS1

Precision Engine Parts has LS3 / L92 2.160 coated Ti valves for less than $90.00 ea. available through most machine shops. Can check weight tomorrow.



PEP Ti Coated 2.16 = 67.2 grams

1cdub

iTrader: (5)

any news on the Ti weights?

See5

iTrader: (53)

LS7 Intake Valve -77.0 g
LS7 Exhaust Valve- 71.7 g
Retainer- 11.1g
keepers pair- 2.6 g
Stock L92 intake-108.6 grams -- Some non magnetic alloy
Manley 11620 -119 grams- Intake- The Manleys are solid SS
Manley 11621-92 grams- Exh
LS3 intake -89 grams – hollow stem alloy
LS3 exh same part# as L92 Exh- alloy

ddcarter

iTrader: (14)

I did buy the heads unassembled from a forum member.

It was cheaper to buy the Manley. I got them from TSP. I did not weigh them before I had them assembled. I wish now [I] would have had them coated. Did not know about that at the time.

camarols1

iTrader: (17)

FWIW ~ The GM LS9 titanium intake valves are about $80 each (GM part# 12605524)

CamaroRick

iTrader: (24)

Anyone have any more info on these valves? Will they hold up to nitrous since they are already used in a blown engine from gm?

CamaroRick

iTrader: (24)

boght a set of LS9 valves, the scale i have only measures in kg, so the weights i have are + or - 5grams.

Stainless valves 125g +-5g
Stock L92 valve 115g +-5g
LS9 ti. zr1 valve 75g +-5g

the ls9 valves are the same exact height as the stock ones, but the grove the keepers sit in are a few mm's lower than the stock and stainless valves.