98TAauto

iTrader: (2)

hey everyone, im gonna go ahead and replace my old 987's on my TEA heads since they are a few years old and I think im getting some valve float with the F11 cam around 6k rpms

are they worth the cash or would 978's work fine with the 228/230 .595 114 cam? I know the golds hold .650 lift and come with retainers and etc also? I take they would also last a pretty good while so i dont have to replace them soon

any thoughts or comments would be great

Beast96Z

iTrader: (21)

Personally, I'd run the gold kit. The springs have been proven to hold some stout cams and have no trouble, so that should be enough reason there. If you have titanium retainers on your 987's, then you can sell those to recoupe some of your money...

98TAauto

iTrader: (2)

thank ya, i still run the stock retainers so i was wondering if i should go ahead and get the titanium ones or not

GuitsBoy

iTrader: (4)

Its a nice looking kit. I have one sitting at home. For the price, how can you go wrong?!?

PREDATOR-Z

I would run 918's with Tit retainers for a lighter moving mass and better harmonic control (less chance of valvefloat).

JNorris

iTrader: (4)

What is the weight of the 987/977 with Ti retainers, 918 with Ti retainers, and the TEA Gold springs?

John

98TAauto

iTrader: (2)

i take the 918's would make a lil more power than the duals? Im just iffy on those since I did have one break 3 years ago with their defect lol... i like the duals for the added insurance and the golds for there .650 rating

i think the 918's only handle .600 lift so thats pushing the limits

GuitsBoy

iTrader: (4)

The 918's will handle greater than .600 in real world applications. However, I too feel safer with a dual spring. If i had a race motor maybe i would try and get away with the lighter valvetrain. I know too many people that have broken valvesprings to run singles on my daily driver.

98TAauto

iTrader: (2)

thats exactly what I was wondering.. i drive mine on the street more than down the track at this time. So i definitly need something thats gonna hold hands down...

i know the tit retainers lighten the valvetrain, but do they really help to justify the price?

PREDATOR-Z

Effective Valve Mass Comparison


Steel Valve 125 g

Reg Spring 120 g

Steel Retainer 34 g

Steel Keepers 6 g

Effective Valve mass 205 g




--------------------------------------------------------------------------------

TI Valve 80 g

Reg Spring 120 g

Steel Retainer 34 g

Steel Keepers 6 g

Effective Valve mass 160 g




--------------------------------------------------------------------------------

Steel Valve 125 g

Beehive Spring 72 g

Steel Retainer 17 g

Steel Keepers 6 g

Effective Valve mass 154 g




--------------------------------------------------------------------------------

Steel Valve 125 g

Beehive Spring 72 g

TI Retainer 8 g

Steel Keepers 6 g

Effective Valve mass 145 g




--------------------------------------------------------------------------------

TI Valve 80 g

Beehive Spring 72 g

TI Retainer 8 g

TI Keepers 3 g

Effective Valve mass 98 g







Currently Available Springs


Part # 26915
Seat Lbs. 105 @ 1.8"
Open Lbs. 293 @ 1.8"
Rate (Ave) 313 lbs./in. 313 lbs./in.
Coil Bind 1.085"
O.D. 1.290/1.060"
I.D. 0.885/0.656"

Part # 26918
Seat Lbs. 130 @ 1.8"
Open Lbs. 318 @ 1.2"
Rate (Ave) 313 lbs./in.
Coil Bind 1.085"
O.D. 1.290/1.060"
I.D. 0.885/0.656"

Part # 26095
Seat Lbs. 180 @ 1.9"
Open Lbs. 4308 @ 1.2"
Rate (Ave) 357 lbs./in.
Coil Bind 1.170"
O.D. 1.600/1.185"
I.D. 1.145/1.030"

2xLS1

iTrader: (25)

Where did you get those weights. Here is what I have personally weighed on a OHAUS Triple Beam Scale with .1g resolution.
Stock steel retainer (beehive) - 11g
Comp Ti retainer (beehive) - 9g
PP Super 7 retainer - 9.5g
2 Stock locks - 2.5g
2 Super 7 locks - 6.8g

PREDATOR-Z

http://www.krcperformance.net/newcontent/beehive.html

I weighed mine and came pretty close

My moving Valve assembly is 127gr (LS6 valve, 918 (Blue), Tit retainer, steel keeper), not a triple beam though

Beast96Z

iTrader: (21)

The FMS lobes are just a tad easier on the springs than a XE-R. I wouldn't trust the 918's. Maybe if the cam was smaller, but it's just getting to close to the limits with a single spring. Plust the gold kit is cheaper and comes with titanium retainers.

XIII

I am no rocket scientist but intuitively (sp?) I don't think you can take full credit for the spring weight as you can with the other items listed. The entire spring is not moving so at the most you would be receiving only part of the benefit of the lighter mass, would you not? To continue this point, just off the top of my head, I would say that the 160 gram example you list with the Ti valve would be more advantagous than the 154 gram example with the steel valves due to all of the weight savings being part of the moving mass. This would also seem to mean that with equivilant spring pressure, the 160 gram example would be able to rev higher without valve float (everything else being equal).