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Anyone running >.630 lift

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Old 05-22-2005, 05:52 PM
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Default Anyone running >.630 lift

I was wondering who was running .630 lift and greater. (1.7 rockers)

What set-up are you using for the rest of the valvetrain? What springs/longevity issues are you having? Have you been able to run the motor high in RPM without valvefloat issues?
Old 05-22-2005, 06:00 PM
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don't you already have a post in this section concerning this?

sorry i don't have anything to add here, just curious about that.
Old 05-22-2005, 06:04 PM
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Originally Posted by cyphur_traq
don't you already have a post in this section concerning this?

sorry i don't have anything to add here, just curious about that.
No it turned into a 1.8 rocker arm discussion, this thread is for 1.7 rockers and .630 lift.
Old 05-22-2005, 06:08 PM
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i replied in other post but.. .639 .646 hydraulic roller 408. Manley dual springs, crane lifters, comp pushrods, stock rockers.

Motor has not been run yet, i am still putting the car back together.
Old 05-22-2005, 06:21 PM
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Originally Posted by Spinmonster
No it turned into a 1.8 rocker arm discussion, this thread is for 1.7 rockers and .630 lift.
gotcha
Old 05-22-2005, 06:23 PM
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I'm running 630/640ish lift on my PRC Platinum spring kit & AFR 225s What you thinking about building?
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Old 05-22-2005, 06:30 PM
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I'm 630 lift on the exhaust side, 1.7 y/t's and comp 977's.
Old 05-22-2005, 07:11 PM
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I was running a .651 LSK Comp lobe in a 346. It wasted my comp r lifter though.
Old 05-23-2005, 01:10 AM
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Originally Posted by DAPSUPRSLO
I was running a .651 LSK Comp lobe in a 346. It wasted my comp r lifter though.
What is a LSK Comp lobe?

I see some use it and it is interesting that the applications are widespread. I am trying to maximize variables for my new 402 build-up.

Jason98TA I will be in touch for the heads.

For those of you that use this lift are you experiencing and issues with excessive spring wear? How high do you wind the motor? How often is it checked? I know that some of you are constantly into your motors but just curious as to what limits there are in some areas. With the springs I have the crane duals rated (BY THEM) for .650 lift. That is free torque for those that wish to deal with the spring issues.
Old 05-23-2005, 01:11 AM
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Originally Posted by SiL3NtXWS6
i replied in other post but.. .639 .646 hydraulic roller 408. Manley dual springs, crane lifters, comp pushrods, stock rockers.

Motor has not been run yet, i am still putting the car back together.
Definitely keep us posted. What are the other cam specs?
Old 05-23-2005, 01:55 AM
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I havent run mine yet still sitting in the shipping crate, cam is .6307/.6222 231/242 114*LSA 111*ICL. PP Gold Springs, Morel Hyd Lifters, TR Pushrods and Stock rockers, stuffed into a forged 347ci chunk of aluminum waiting to be fed some mild doses of nitrous. Cant wait.
I am going to guess depending how long the springs see the higher rpms, and the frequency of those visits will determine how long they will last. Like any other spring, if you keep it rev'd for long durations you'll lose longevity.
Old 05-23-2005, 05:37 AM
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635/627 here. I'm using the PRC dual springs, TR pushrods, stock lifters and rockers. I barely have any miles on this setup but I'm not expecting too many years of life out of these things.
Old 05-23-2005, 05:51 AM
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732/734 Jesel Solid Lifters, Jesel Mohawk Rockers, Comp 944 Springs
Old 05-23-2005, 07:33 AM
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Originally Posted by Spinmonster
What is a LSK Comp lobe?

I see some use it and it is interesting that the applications are widespread. I am trying to maximize variables for my new 402 build-up.

Jason98TA I will be in touch for the heads.

For those of you that use this lift are you experiencing and issues with excessive spring wear? How high do you wind the motor? How often is it checked? I know that some of you are constantly into your motors but just curious as to what limits there are in some areas. With the springs I have the crane duals rated (BY THEM) for .650 lift. That is free torque for those that wish to deal with the spring issues.

Lobe#, Dur. @ .006", .050", .200", & Lift w/1.7 rocker
2124 265 215 142 .629"
2125 269 219 145 .632"
2126 273 223 149 .636"
2127 277 227 153 .639"
2128 281 231 156 .643"
2129 285 235 160 .646"
2130 289 239 164 .649"
2131 293 243 168 .653"
2132 297 247 171 .656"
2133 301 251 175 .660"
2134 305 255 179 .663"
2135 309 259 183 .663"
2136 313 263 186 .663"


These are the LSK lobes. I believe they are in the new master catalogs. Very very agressive. The 239 at .050" LSK lobe is bigger then the 242 at .050" XE-R Lobe by the .200" number.
Old 05-23-2005, 07:44 AM
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Originally Posted by Spinmonster
I was wondering who was running .630 lift and greater. (1.7 rockers)

What set-up are you using for the rest of the valvetrain? What springs/longevity issues are you having? Have you been able to run the motor high in RPM without valvefloat issues?
Over .630" lift with this set up...

AFR 205 Heads
Titanium Super Seven Retainers
Gen-4 Dual Valve Springs
Hardened Push Rods
Stock Rockers



Works great!

Ed
Old 05-23-2005, 08:03 AM
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.646 lift on both intake and exhaust here. Isky springs. No valve float up to 7600. This is with a hydraulic setup.
Old 05-23-2005, 08:46 AM
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Originally Posted by BTL FED
732/734 Jesel Solid Lifters, Jesel Mohawk Rockers, Comp 944 Springs
DEAR LORD
Old 05-23-2005, 09:18 AM
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Originally Posted by DAPSUPRSLO
Lobe#, Dur. @ .006", .050", .200", & Lift w/1.7 rocker
2124 265 215 142 .629"
2125 269 219 145 .632"
2126 273 223 149 .636"
2127 277 227 153 .639"
2128 281 231 156 .643"
2129 285 235 160 .646"
2130 289 239 164 .649"
2131 293 243 168 .653"
2132 297 247 171 .656"
2133 301 251 175 .660"
2134 305 255 179 .663"
2135 309 259 183 .663"
2136 313 263 186 .663"


These are the LSK lobes. I believe they are in the new master catalogs. Very very agressive. The 239 at .050" LSK lobe is bigger then the 242 at .050" XE-R Lobe by the .200" number.
So the initial ramp rate is 50 but increases as the lift increases? My Xer cam is a 49 ramp rate. This cam is a 50 by the same (.006-.050 lift formula). What lifters do you use? It must pull great down low for a huge cam.
Old 05-23-2005, 09:36 AM
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Was wondering if you guys would know is .600 lift too much for afr 205cc heads milled for a 11:1 CR with .041 gaskets? Will i have piston to valve problems?
Old 05-23-2005, 10:45 AM
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Originally Posted by 1999TransamWs6
Was wondering if you guys would know is .600 lift too much for afr 205cc heads milled for a 11:1 CR with .041 gaskets? Will i have piston to valve problems?
Depends on the timing events and the lobes used but mine had plenty of P/V with milled AFR heads and using the .040" thick Cometics on a stock GTO shortblock...

Ed


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