hydraulic roller cam/mechanical roller lifters - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-27-2010, 01:29 AM
Registered User
 
Join Date: Mar 2010
Location: atlanta ga
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hydraulic roller cam/mechanical roller lifters

Who can answer this for me. Sbc 350. 96 chevy vortec heads all stock. comp cams 500 lift hydraulic roller cam. crane pop up mechanical roller lifters. erson roller rockers 1.5. i have this in my engine. runs fine. Will these solid lifters eventually damage my cam because its not hydraulic on hydraulic?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-27-2010, 02:12 AM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 7,732
Wiki Edits: 0

Thanks: 12
Thanked 162 Times in 148 Posts
You will need to keep on top of the lash settings and not let them get loose, keep them tight in the .006"-.012" range so they don't get beat to death by the lack of a lash take-up ramp that is not present on the hydraulic lobe profile. Pretty much the tighter, the better as long as you are not holding the valve off the seat when it should be closed.

I have to ask, why are you doing this??

It is hit or miss as to whether you get the combo right. I know folks are doing this for some rules restricted racing classes but the parts are carefully picked by the cam designer, they don't just do this with the average off the shelf hydro roller stick. Spring rates, valve weights, pushrod stiffness, base circle run-out, etc are all important, the guys doing this right are most often getting the parts Spintron tested to make sure they all play nice together.

Unless this is fully scienced out..., and from your description it doesn't sound like it is,... it will beat the valvetrain to death, including the needle bearings in the roller lifter. It is disaster waiting for the right time to happen.

Last edited by ericnova72; 04-27-2010 at 02:57 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-30-2010, 03:24 PM
Member
 
Join Date: Nov 2001
Posts: 437
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 10 Posts
Hyd roller cam / mech roller lifters

I have done this on three engines with no adverse effects. The Hyd Roller cams I used are billet steel and work fine with the Mech Roller lifters. I noticed a slight performance gain but not a big difference.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-01-2010, 07:57 AM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 1 Time in 1 Post
I think you're asking for trouble without lash ramps on the hyd cam. I think it will run fine, but you are absolutely punishing the valvetrain.

You're also asking for trouble using .500" lift on stock Vortecs. Sounds like you have way too much cam for the valvesprings - both in their lift capabilities and seat pressures.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
hydraulic cams/lifters brian12c Engine 4 03-07-2005 08:46 PM
Hydraulic Lifters Vista Cruiser Engine 8 02-19-2004 10:09 AM
Street Hydraulic Roller Vs Flat Tapet Hydraulic bigjoedo Engine 3 11-25-2002 04:06 PM
hydraulic roller lifters hvyeqpmech Engine 2 09-01-2002 12:23 PM


All times are GMT -6. The time now is 09:22 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.