vortec 406 street strip cam help - 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 09-28-2011, 12:04 AM
Registered User
 
Join Date: May 2008
Location: Seattle
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
vortec 406 street strip cam help

I have 1 1979 malibu with pretty much stock weight glass bumpers but added sunroof weight and stereo. No heater box. The car has 3.42 gears and an eaton posi in a grand national 8.5 housing. I have a 2500 rpm 12" stall and a 3000 rpm 10" stall. The exhaust is in the air as of size and primary size but I will be running an x pipe and pypes race pro mufflers. Now that you know about the car my plans for it is a street strip type of vehicle. Really fast street car weekdays weekend racer.
So now heres are the motor specs:
sb400 bored 40 over
9.9:1 compression
vortec heads set up for high lift
Performer rpm airgap
have a holley 750 vs. carb and a aed 950 ms carb
My cam choices currently are 2 Lunati voodoo solid tappet cams which are as follows:


Lunati Voodoo 60140
Adv. Duration:266/276
Duration @ 0.050" :233/241
Gross Lift:.505"/.520"
LSA/ICL:110/106
Valve Lash:.016"/.016"
RPM Range:2400-6600

and the other choice is
Lunati Voodoo 60141
Adv. Duration:276/282
Duration @ 0.050" :241/249
Gross Lift:.520"/.540"
LSA/ICL:110/106
Valve Lash:.016"/.016"
RPM Range:2600-6800

Need vacuum brakes and a canister is acceptable. Either cam will be used with 1.5 rockers. My last cam used in this motor was the lunati 60103 and it was ok just want alot more power. Liked the instant power of this cam and snappy throttle response but I ran 1.6 rockers on this cam
old cam
Adv. Duration:268/276
Duration @ 0.050" :227/233
Gross Valve Lift:.489"/.504"
Lobe Separation Angle / Intake Centerline:110/106
Valve Lash:Hyd/Hyd
RPM Range:1800-6200
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-28-2011, 10:16 AM
zildjian4life218's Avatar
Listen and Learn
 
Last wiki edit: DIY junkyard electrical fan controller
Last journal entry: SBC 305 Twin Turbo
Last photo:
Join Date: Dec 2008
Location: WNY/Rochester, New York
Age: 25
Posts: 1,512
Wiki Edits: 7

Thanks: 41
Thanked 6 Times in 6 Posts
Why a solid cam? That can be a poor choice for a street car.. I mean I personally don't want to be adjusting valves every couple weeks. I would think your second cam choice is a little big for stock vortec heads. Do some research on what kind of duration those heads like. Im running 236/246 @ .050 on my vortec heads and a lot of people told me thats more than the stock heads can support... especially at 170cc. You might want to look into getting some work done on the heads.. maybe larger exhaust valves to bring up that I/E ratio.... or maybe even a set of alum heads.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-28-2011, 10:30 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 28
Posts: 8,239
Wiki Edits: 0

Thanks: 12
Thanked 221 Times in 206 Posts
The first cam you selected probably wont be noticeably different from what you have now, but as already noted, your heads are what is choking you.

You can dump some money into them and have them ported out along with a valve job, or just buy a better set of heads.

Due to all the hype about velocity I see a lot of people running too small of a head for their power goals. While velocity is important, too much of it just creates choke.

When I do Vortec heads I usually end up with about a 190cc runner, and even that is small for a healthy 350.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-28-2011, 06:16 PM
Registered User
 
Join Date: Apr 2011
Location: ky
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i currently have a 406 sbc with procomp 210cc aluminum heads a lunati voodoo 60105 hydraulic camshaft with 10.5 to 1 comp. a 750 holley double pumper and this camshaft does everything its says it will do i shift at 6700 rpms and it gets there in a hurry. this engine is also in a 1981 malibu. i would reccomend this camshaft to anyone. it sounds really wild.

i have a 350 turbo with 3500 stall and 4.10 gears.

i set my intial timing at 24 degrees and this engine loves it
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-28-2011, 10:10 PM
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: Tri-Cities, Washington
Age: 67
Posts: 5,151
Wiki Edits: 9

Thanks: 86
Thanked 122 Times in 114 Posts
Quote:
Originally Posted by zildjian4life218
Why a solid cam? That can be a poor choice for a street car.. I mean I personally don't want to be adjusting valves every couple weeks.
That's old school thinking, it doesn't hurt to check them every six months or so. I run a custom grind Lunati solid roller, .590 lift, with the aggressive VooDoo profile, and haven't needed an adjustment for over a year, using ARP PermaLoc's. You'll have a little more noise, if that bothers you...
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
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
which cam for a street/strip 383 my87Z Engine 5 07-09-2011 02:43 PM
opinions on solid roller lifters for a street/strip car that sees more street time my87Z Engine 1 07-03-2011 11:52 AM
Rear End for street/strip Fnix Transmission - Rearend 6 11-07-2008 10:27 AM
street/strip converter fastfan Transmission - Rearend 10 08-25-2006 01:08 PM
350 or 383 for street some strip graham83oh Engine 3 12-30-2002 09:53 PM


All times are GMT -6. The time now is 02:37 AM.


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.