*Help* Cam time Solid or Hydraulic???
Thread Starter
Team Owner
Joined: Feb 1999
Posts: 34,454
Likes: 665
From: Republic of Texas
*Help* Cam time Solid or Hydraulic???
Now this isn't a debate wether or not solid is better than hydraulic or vice versa. What I'm asking is wether or not I NEED a solid cam and lifters.
My Setup:
Mark V 454 H.O. bored .060+
502 rectangle heads w/ 2.19/1.90 valves 118cc/ 325cfm
Stock 454 Forged crank
Forged GM "I" beam "Dot" rods 7/16 bolts
TRW forged 10:1 pstons
Dual plane intake with (either a 850/950 cfm carb)
Now I want this motor to turn no more than 7,000rpm , and would prefer it to pull to roughly 6,500rpm.
My question is will a hydraulic cam and lifter pull to 6,500/7,000rpms? Or will it float the vales? The Gen V has a no-adjustable valvetrain and I would have to make mods to run a solid where as there will be no trouble to run a hydraulic. I already have a spare set of hydraulic lifters so all I would need is a cam, where as I'll need everything for the solid. Could I get in the vicinity of 600hp w/ a hydraulic? I planned on running a 292S Solid from comp cams, but looking and the cost and beinifits I'm not sure.
Can anyone help I need to buy a cam VERY soon.
:cheers:
[Modified by Corey 68, 10:43 AM 5/7/2002]
My Setup:
Mark V 454 H.O. bored .060+
502 rectangle heads w/ 2.19/1.90 valves 118cc/ 325cfm
Stock 454 Forged crank
Forged GM "I" beam "Dot" rods 7/16 bolts
TRW forged 10:1 pstons
Dual plane intake with (either a 850/950 cfm carb)
Now I want this motor to turn no more than 7,000rpm , and would prefer it to pull to roughly 6,500rpm.
My question is will a hydraulic cam and lifter pull to 6,500/7,000rpms? Or will it float the vales? The Gen V has a no-adjustable valvetrain and I would have to make mods to run a solid where as there will be no trouble to run a hydraulic. I already have a spare set of hydraulic lifters so all I would need is a cam, where as I'll need everything for the solid. Could I get in the vicinity of 600hp w/ a hydraulic? I planned on running a 292S Solid from comp cams, but looking and the cost and beinifits I'm not sure.
Can anyone help I need to buy a cam VERY soon.
:cheers:
[Modified by Corey 68, 10:43 AM 5/7/2002]
Drifting
Joined: Mar 2001
Posts: 1,396
Likes: 6
From: Indiana
Re: *Help* Cam time Solid or Hydraulic??? (Corey 68)
You can get hydrualics to rev by using anti pump-up lifters, but you need to set them at zero lash, so you would still need the adjustable rocker set up.
Thread Starter
Team Owner
Joined: Feb 1999
Posts: 34,454
Likes: 665
From: Republic of Texas
Re: *Help* Cam time Solid or Hydraulic??? (tsw71)
You can get hydrualics to rev by using anti pump-up lifters, but you need to set them at zero lash, so you would still need the adjustable rocker set up.
Drifting
Joined: Mar 2001
Posts: 1,396
Likes: 6
From: Indiana
Re: *Help* Cam time Solid or Hydraulic??? (Corey 68)
Sorry. I meant adjustable valvetrain. You should be fine with the hyd at 6500, but anything beyond is pushing it. Still though, I would go with solids. With all the money that you have in the motor already, another couple hundred dollars for a good piece of mind and better upper rpm performance and reliability is worth it.
Instructor
Joined: Apr 2002
Posts: 115
Likes: 0
From: Pg county MD
Re: *Help* Cam time Solid or Hydraulic??? (Corey 68)
Go Solid. You won't float the valves if the springs are stiff enough. Your problem with the hydrolic (spelling) be that there isn't enough oil pressure in any motor to keep the lifters "pumped up" with 7000 rpm on the tach. that'll cause erratic lift and duration at the Rpm's you and crazy engine event at those speeds are not good usually. This is just a personal opinion. I'm sure some of the more experienced engine builders will chime in :chevy :chevy :chevy
Pro
Joined: Feb 2002
Posts: 543
Likes: 0
From: nyc ny
Re: *Help* Cam time Solid or Hydraulic??? (Corey 68)
hydraulic roller cam set, with matching valve springs and lifters. the only way to go, meaning buy the package , matching components working in unison. Call the cam company you are looking into and ask them what works and give them as much info on the engine and trans rear gear ratio. and what you want as far as performance wise. and before everybody gets in my neck the hydraulic roller set up was just an example of how you could go, there is no one size fits all here :lol:
[Modified by One GM A Tech, 7:33 PM 5/7/2002]
[Modified by One GM A Tech, 7:33 PM 5/7/2002]
Safety Car
Joined: Jul 2001
Posts: 3,921
Likes: 2
From: York PA
Re: *Help* Cam time Solid or Hydraulic??? (One GM A Tech)
hydraulic roller cam set, with matching valve springs and lifters. the only way to go, meaning buy the package , matching components working in unison. Call the cam company you are looking into and ask them what works and give them as much info on the engine and trans rear gear ratio. and what you want as far as performance wise. and before everybody gets in my neck the hydraulic roller set up was just an example of how you could go, there is no one size fits all here :lol:
[Modified by One GM A Tech, 7:33 PM 5/7/2002]
[Modified by One GM A Tech, 7:33 PM 5/7/2002]
everything should be matched
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Burning Brakes
Joined: Mar 2001
Posts: 1,211
Likes: 5
From: Nashville TN
Re: *Help* Cam time Solid or Hydraulic??? (Corey 68)
I vote for solid roller set ups as ideal, solid lifter flat tappet as second. The picture tells my story with a hydaulic roller. I am not running a solid LT-1 spec cam.
