ejbta2

I am using comp 1.75 rr with a 228/230 .571/.573 lift cam and pac 1218 beehive valve springs good for .600 lift and shifting at 6500. I am experiencing valve float. Do I need dual springs? If so I was looking at Lunatis 73925k1 with 153 seat pres. and 400 open pres. with 379 spring rate from Summit, should these work, they are good for .660 lift.

JakeFusion

iTrader: (7)

You need more open pressure than that ~440 open. Brian Tooley Racing Max Pressure springs or PRC springs would be the ones to get.

boostit5.3

iTrader: (3)

i was gonna say the same thing brian tooley platinums should be perfect for you. how ever im running the psi max life 1511 they are good to .630 lift. they are a single beehive that use all factory seats and retainers.

JakeFusion

iTrader: (7)

Not the Platinums. Max lift. You need more open pressure than the Platinums. Beehive springs are NOT ADVISED with aftermarket roller rockers.

boostit5.3

iTrader: (3)

your nuts, did you see the baby cam he is running? why would he need more than the platinum?

boostit5.3

iTrader: (3)

and beehive springs arent advised with roller rockers? why not lol.

here's the link to the spring kit great price!

http://www.briantooleyracing.com/660...retainers.html

Gray86hatch

iTrader: (83)

Ditch the rockers. Stockers are perfect for your cam.

I run the lunati kit on two engines one is 250ish .660 shifted at 7200 just over 60 passes and 1200the miles springs are still perfect.
Other engine has 11,000 miles on it last two summers 230ish .600 springs checked great.

Tim

boostit5.3

iTrader: (3)

actually he has these on sale for 209

http://www.briantooleyracing.com/660...retainers.html

ejbta2

My cam should be beehive friendly, but the rr are wanting more spring pressure thus the valve float. But I want to keep the rr because I have a lot of $ tied up in them and I don't want to remove them. So I was just wondering witch springs to buy and how much pressure is needed for my application. I will be looking at the PRC from Texas Speed.

Mirko76

Really, I went to look at

JakeFusion

iTrader: (7)

Heavy *** roller rockers. They weigh a ton and need a lot of open pressure to control them. If you know of some beehive springs with more than 420lbs of pressure (or that can be shimmed to have that sort of pressure, then run those). Maybe PSI 1511?

Either way, I'd ditch the roller rockers and run the stockers and the springs you have would be fine. Mismatched parts sigh. The roller rockers aren't really better in any scenario unless you're at .650 lift and/or are looking for every last HP.

boostit5.3

iTrader: (3)

the brian tooley platinums are still a double valve spring, not a beehive.

boostit5.3

iTrader: (3)

my psi 1511's have 370 open pressure 384 spring rate and his pac 1218's have 318 open pressure. if he was just starting to be concerned with valve float at 6500 i think the psi's might be up to the task. (single beehive ftw! lol) i will add that i am also using stock rockers on my motor with my springs and the cam is .221 .228 .581 .588

boostit5.3

iTrader: (3)

but i got a good deal on my springs off the classifieds if i was buying new those tooley springs are the way to go, i bought some chromoly pushrods from him for 90 dollars shipped brand new try finding them cheaper and better quality!

JakeFusion

iTrader: (7)

I know the BTR springs are duals. I'm just saying the BTR Max Pressure springs have 450lbs of open pressure specifically to deal with roller rockers. Tooley himself recommends the Platinum springs and their 400lbs of open pressure for stock rockers.

boostit5.3

iTrader: (3)

i think you got it backwards, your not suppose to use the stock rockers with that much spring pressure, thats why he recommends roller rockers if using the extreme lift springs. if it was a bigger cam and then you add in the roller rockers i would say go with the extreme lift set, but why spend the money. its just unnecessary load on the valve train when you have too much spring. it even says here you can use the stock rockers with the extreme pressure springs but its reccomended on track only.

"".650" Lift Dual Spring Kit for LS engines using roller rocker arms, or track only applications using stock rockers"

boostit5.3

iTrader: (3)

if your looking into texas speed just give them a call, they'll know what you need to run.

JakeFusion

iTrader: (7)

Sigh. That's exactly what I said. The platinum are for stock rockers.

Max Pressure 450lbs open = roller rockers
Platinum 400lbs open = stock rockers

boostit5.3

iTrader: (3)

they are not "specifically designed for roller rockers" like you said....

and i still think the extreme springs wont match good with his setup, too much spring. unnecessary ware on valves, rocker arms, pushrods, lifters. buts its w/e, everyone has an opinion this is just mine.

JakeFusion

iTrader: (7)

TSP springs have more open pressure FWIW. You should try to run as little spring as possible. The OP could shim the springs he has to see if that fixes it. Or run the PSI 1511s. Or just go back to stock since those are the best anyway.

And I still stand by my assertion that if you're going to run heavy over the nose roller rockers, you need a lot more spring pressure than you'd otherwise need, regardless of lobe design. It just comes down to the mass the spring is trying to control.