[11MPG]

Titanium valve spring retainers? Worth the extra money or is it expensive overkill with a 224/230 0.609/0.607 cam?

 

[DirtyBlackHD]

Depends on what rpm's you plan on running, valve weights, etc.

 

[barrrf]

LOL - planning a build instead of just throwing parts it? Who ever heard of such a thing.

 

[2005_Silverado]

Depends on what rpm's you plan on running, valve weights, etc.

this

 

[11MPG]

Yeah barrrf. Took a step back and figured I had all the ingredients, but they weren't mixed right. Have the heads, and intake with 60 pound injectors. Needs a real cam. Called EPS with my goals and got a cam from Geoff ordered. After winter ends, pulling out the old 5.3 with 146k miles on it and taking it to Absolute Performance. Have them hone it out to 3.8 and stab in 11:1 pistons and new connecting rods. When I get it back I'll probably change out the lifters and put in new cromoly push rods.

Don't know the final rpm. Might peg the 6,800 mark, but not sure. Either way don't know how long till my trans is toast again.

 

[Hogg]

Overkill, esp. on any street engine. Might be advantageous on teh GEN 1, GEN 1E(Vortec) or GEN 2 LT1/4-L99, but teh GEN 3-4-5 engines alreaDy use Beehive style springs that use a retainer thats almost 1/2 the size of conventional SBC retainers.

peace
Hog

 

[11MPG]

Overkill, esp. on any street engine. Might be advantageous on teh GEN 1, GEN 1E(Vortec) or GEN 2 LT1/4-L99, but teh GEN 3-4-5 engines alreaDy use Beehive style springs that use a retainer thats almost 1/2 the size of conventional SBC retainers.

peace
Hog

Good to know. Thanks for the help.

 

[Hogg]

Good to know. Thanks for the help.

No probs, here is some specs from the highest revving EFI Vette engine, the 427 LS7. As you can see at the bottom under materials, it uses a titanium intake valve. I cant find out with certainty if teh LS7 uses titanium retainers or not?

2010 "LS7" 7.0L V-8 ( LS7 ) 06/05/2009
Type: 7.0L Gen IV V-8 Small Block
Displacement: 7008 cc (427.6 ci)
Engine Orientation: L=Longitudinal T=Transverse L
Compression ratio: 11.0:1
Valve configuration: Overhead valves
Valves per cylinder: 2
Assembly site: P.B.C. Wixom, Mi.
Valve lifters: Hydraulic roller
Firing order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x stroke: 104.8 X 101.6
Bore Center (mm) 111.76
Bore Area: ( cm2 ) ( total engine bore area ) 689.75
Fuel system: Sequential fuel injection
Fuel Type: Premium Fuel required
Engine Mass ( kg/lbs ) 206 / 454
Application: Horsepower: hp ( kw )
Chevrolet Corvette Z06 505 hp ( 377kw ) @ 6300 RPM SAE CERTIFIED
Holden Commodore
Application: Torque: lb-ft. ( Nm )
Chevrolet Corvette Z06 470 lb-ft ( 637Nm ) @ 4800 RPM SAE CERTIFIED
Holden Commodore
Maximum Engine Speed: 7100 rpm
Emissions controls: Catalytic converter
Three-way catalyst
Positive crankcase ventilation

MATERIALS
Block: Cast aluminum
Cylinder head: Cast aluminum
Intake manifold: Composite
Exhaust manifold: Stainless Steel
Main bearing caps: Forged steel
Crankshaft: Forged 4140 steel
Camshaft: Hollow steel
Connecting rods: Forged Titanium
Additional features: Extended life spark plugs
Ti Intake Valve
Extended life coolant
Oil level sensor
Oil Life System


peace
Hog

 

[Steve]

If you're going to rev to 6800 rpms I would get them. They aren't that much more expensive and a lighter valve train is never a bad thing when revving that high.

I went with the Brian Tooley ones on my Z06, great spring setup.

 

[DirtyBlackHD]

the ls7 does not use Ti retainers. it does use Ti intake valves from del west and Ti connecting rods.

6800rpm requires stable, light valvetrain. ie- you need PSI 1511ML beehives, Ti retainers, and a relatively light intake/exhaust valve. stay away from dual springs if you want 6800rpm.

On my LS7 I'm running 1511's, katech ls7 ti retainers(required for 1.850 installed height, not for use on your setup... try PAC instead), stock Ti intake valves, and aftermarket Ti exhaust vavles. I turn 7300 without issues. If I had better rod bolts, I have the valvetrain stability to easily reach 7800rpm.

You really should read superchevy's article with katech and LS7 valvetrain stability.

PS. Good for you going with EPS. You'll make HUGE gains going from a baby cam to a real(non-gmfs trend) cam.


FWIW while spec'ing my LS7 build, I weighed everything.
LS7 oem intake valve + retainer 87g
LS7 oem exhaust valve + retainer 83g
Katech Ti LS7 retainers are 6grams lighter than oem
my Ti exhaust valve + ti retainer 71g *excludes lash cap

oem retainers are ~10.5g
pac/manley(what you need) retainers are 5-5.7g

If you really want to go hardcore, oem valve locks are 10g. Ti valve locks are 5g.


high quality pushrods are a must at 6800rpm also. Trend is one of a few good brands. .080 wall minimum.... you could go .135 wall, or possibly increase diameter and go double taper but they are $$$$$$$$$.

 

[11MPG]

Heads are prebuilt from TrickFlow. Genx 205. I'm going to call them about speed. Good advice on the springs.

Main thing I'm worried about is the 2,600 stall. Have to see how it feels and if I can live with it. With the 4.88s and only a 33 inch tire it might be fine. Going with a bigger stall brings up the elephant in the room which is hammering the 10 bolt and the heat towing the camper small as it is.

 

[GREENSIERRA]

I shift at 6800 and run titanium retainers. any weight you can lose when revving high is a good thing

 

[ShredSled]

I have some new Manley ti's still on the card packaging if you're looking for some.