Thoughts on this Hyd Roller in a 383 + TKO - 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 07-21-2011, 07:49 AM
Big Mouse's Avatar
Stroked Z28
 
Last photo:
Join Date: Oct 2006
Location: Escaping the rat race...
Posts: 230
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thoughts on this Hyd Roller in a 383 + TKO

I'm thinking about putting a Lunati 60112 Hyd Roller (cut on the small base circle) in my 383. This is a "rowdy" street car that will get occasional track time.

The cam specs are (Intake/Exhaust):
231/239 @ 0.050"
282/290 Adv.
0.535/0.550 lift
110 LSA / 106 ICL

The engine is a 10.4:1 stroker 383 sbc ('69 4-bolt 010 block and 5.7" rods). Flat top pistons w/ reliefs. Edelbrock RPM heads and intake. Holley 650HP carb, Headers + Exhaust. Tremec TKO600 (0.64 OD) with 3.73's and 29" tires, MSD Ignition. Rev Limiter probably around 6250 - in case I miss a shift...

Is this cam about right for my combo? Will I be OK cruising at 60 mph in OD at 2k RPM's? 110 vs. 112 LSA?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-21-2011, 09:27 AM
Clint Cummins's Avatar
Registered User
 
Join Date: Jul 2011
Location: Any City, USA
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hey,

My first concern would be the edges of the rod bolts touching or striking the cam lobes because of the larger stroke 383 crank.

Hopefully one of these guys have done a similar build to iron the details out.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-21-2011, 10:23 AM
Big Mouse's Avatar
Stroked Z28
 
Last photo:
Join Date: Oct 2006
Location: Escaping the rat race...
Posts: 230
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Clint Cummins
My first concern would be the edges of the rod bolts touching or striking the cam lobes because of the larger stroke 383 crank.
I'm currently running a small base circle hydraulic flat tappet - which seems to give me plenty of clearance. So, hopefully, all will be well with the new cam.

I'm having my machinist double check everything - just to be safe (including clearances, valve-train geometry and piston-to-valve clearance). FWIW, the engine is coming out to investigate low compression on one cylinder - so it's a good time to make the change. There are about 1k miles on the setup right now.

I just want to make sure this cam will pull pretty well down low. I also want to cruise at 1800 to 2000 RPM's - and I want the OD to work for this... Lunati assures me it will. I'm looking for some street experience to confirm.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-21-2011, 10:50 AM
Clint Cummins's Avatar
Registered User
 
Join Date: Jul 2011
Location: Any City, USA
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Big Mouse

I just want to make sure this cam will pull pretty well down low. I also want to cruise at 1800 to 2000 RPM's - and I want the OD to work for this... Lunati assures me it will. I'm looking for some street experience to confirm.
That cam with 231/239 @ 0.050" will be somewhat over-cammed for an engine cruising at 1800 to 2000 RPM's...

The reference for that cam = 3,000-7,000 rpms power range...

Reference link:

http://www.crankshaftcoalition.com/w..._compatibility

I am not for sure the 3.73's and 29" tires is going to help enough.

Does this help any?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-21-2011, 10:58 AM
Clint Cummins's Avatar
Registered User
 
Join Date: Jul 2011
Location: Any City, USA
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hey,

Does Lunati have a similar cam in the 221/229 @ 0.050" 2,000-6,300 range?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-21-2011, 11:05 AM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls/Suncrest, WA
Posts: 5,250
Wiki Edits: 9

Thanks: 105
Thanked 133 Times in 124 Posts
Quote:
Originally Posted by Clint Cummins
hey,

My first concern would be the edges of the rod bolts touching or striking the cam lobes because of the larger stroke 383 crank.

Hopefully one of these guys have done a similar build to iron the details out.
You said you're using a small base circle cam, you're good there. If you want good throttle response from cruise, rethink the cam.
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-21-2011, 11:47 AM
Big Mouse's Avatar
Stroked Z28
 
Last photo:
Join Date: Oct 2006
Location: Escaping the rat race...
Posts: 230
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Yes, it helps. Thanks so far guys.

Quote:
Originally Posted by Clint Cummins
Does Lunati have a similar cam in the 221/229 @ 0.050" 2,000-6,300 range?
Well, of the manufacturer's suggestions, Howards and Crower come the closest to that range. The recommendations I've received thus far have clumped into two groupings:
  • 224 to 225 @ 0.05" INTAKE 230 to 232 EXHAUST (which includes Crower and Howards)
  • 230 to 232 @ 0.05" INTAKE 236 to 239 EXHAUST (which includes Lunati and Comp)

Howards seems to be in the middle with lower lift and longer durations on their cams --- and Howards INSISTS that I use the 112 LSA. Comp, Lunati, and Crower all said 110 LSA.

Howards suggest their 110245-12 cam:
224/230 @ 0.05"
280/292 Adv
0.501"/0.509" with 1.5 ratio
112/106

I currently have a 230/236 @.05" 274/286 adv .49/.49 hydraulic flat tappet. It does just fine cruising in OD at 1800 RPM's. It will accelerate mildly from there (no downshift for hills).

I want a roller equivalent that is one step up from my current cam (XE274h). Suggestions?

Last edited by Big Mouse; 07-21-2011 at 12:07 PM. Reason: I added more details to clarify my post...
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-21-2011, 04:56 PM
Registered User
 
Last photo:
Join Date: May 2008
Location: ohio
Posts: 1,461
Wiki Edits: 0

Thanks: 35
Thanked 42 Times in 39 Posts
I am running that exact lunati cam in my 86 s10 but mine is a 350ci and I have no issues with mine but I don't have overdrive like you do so cruising down the highway at 55mph I am around 2500 rpm.

I am running 3:73 gears with a 3000/3500 stall and if I am in drive in town and I am under 2000 rpm the engine does not do very well so I just down shift to 2nd gear when I need to but highway wise that cam is killer with a good setup.

I have very crisp instant throttle response and the torque is way awesome and with yours being a 383 it would be even more. As stated if your wanting to use the overdrive for highway you might want to go smaller on the cam. Mine does not like it under 2000 rpm very well and it will drive decent but not good.

Hope that might help out in your decision you could go with the next smaller voodoo cam the 60111 it would be a really good cam as well. Guarantee there would not be a big drastic difference in horse power between the 60111 and 60112 cams but there would be a mild difference in how it would run in your combo. The other options you have look good as others have stated as well.
Eric
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-21-2011, 09:16 PM
Big Mouse's Avatar
Stroked Z28
 
Last photo:
Join Date: Oct 2006
Location: Escaping the rat race...
Posts: 230
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
That is great feedback - thank you. I'm hoping the extra cubic inches will help me a bit. I'm also running a 4-hole spacer which may help boost the low end signal. Good stuff!
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-22-2011, 02:13 PM
Registered User
 
Last photo:
Join Date: Jun 2009
Location: Camaro land
Posts: 357
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
the 112 LSA will give you more vacume keeping the valves closed longer than a 110 LSA, so a 112 will have abit more low end torque for lower rpm crusing.. 110 still not bad but dont go lower than that, 109 and lower will be a little to much overlap and a little loss of compression as well
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 roller cam/mechanical roller lifters cutlassryder Engine 3 05-01-2010 07:57 AM
SBC Factory roller lifter retro on non roller block 383ram Engine 1 01-24-2009 07:16 PM
plz help,,,1988 vette 350 hyd roller motor can i convert it to hyd non-roller?? tiresmoke55 Engine 20 05-24-2006 01:51 AM
Which is better Hydrallic Roller or Solid,Mechanical roller dboyett38666 Engine 4 04-02-2006 08:59 AM
Hydraulic roller vs. solid roller cams? chanson Engine 2 11-21-2003 09:30 PM


All times are GMT -6. The time now is 10:21 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.