Going Hydraulic

[K.O. SWINGER]

I believe is valve train component weight is one of the most determining factors in valve train stability...do you think roller cams use such high spring pressures for no other reason than profile

Gotcha. I don't agree with you there. I feel component weight has an amount of bearing on stability, but no way is it on of the "most important". Not even close. IMO the most important factors in terms of stability (on a mopar) are the valve job - (setting the rocker geometry) and the pushrod. Not because of weight, but because of deflection.
My understanding is rollers use high spring pressures for several reasons: They are a little heavier individually; they have the added friction of the linkage; they have to follow a much more aggressive ramp on opening and closing; they have to maintain control of the spring harmonics over a much wider rpm range due to the expected higher rpm usage. I don't feel weight is a major concern given the last two.

disgust maybe I should just buy you A drink LOL

 

[273]

sorry 273 in my opinion based off running what I consider hot hyd cams on the street for 20 year or so you are asking a lot from a hyd set up, but yes its totally doable, but the cam specs needed to have that rpm capability and gears needed to match 456 or so well not much fun to me on the street I ran 430s at one time it was a great match for my cam but i don't like my car winding like that on the freeway!

I'll be running 4.+:1 rears gears don't really do any highway driving not much of a concern, but the trick right now getting a cam that will work on the track and still be fun around town.

 

[K.O. SWINGER]

I'll be running 4.+:1 rears gears don't really do any highway driving not much of a concern, but the trick right now getting a cam that will work on the track and still be fun around town.

well the sky is the limit on grinds but I am old lol=old school I like as much compression as i can use and then some, then saw it off a little with a healthy dose of duration it really helps at high rpms plus it sound b.a .I run lightly ported X heads m1 single plane and 850 TQ I like my cams on a 108 center around 235 to 245 @50 and lift in the 510 range that allows me to run stock hd hyd assemblies with never a problem ...I am running crane doubles 140 on the seat 300 on the nose. my sweat spot is 4000 to 6700 works for me :thumrigh:

 

[Arco440]

I can say i have used Rhoads lifters in my 440 for over ten years now.It does allow me to drive it at low rpms with very tame driving habits.but hold on once you stab it and get above 3000 RPM and if memory serves me right i think this is the cam that is in my motor but to be sure i will have to find my cam card.
http://www.summitracing.com/search/...treme-energy-cam-and-lifter-kits?autoview=SKU

 

[Babyblue66]

If your talking high r's and a little motor, the word hydraulic doesn't even enter the equation. And its not about weight savings. Its about valvetrain stability.