406 9:5:1 - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-20-2011, 10:59 PM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
406 9:5:1

Can 406 sbc get 500 HP with 9:5:1 compression

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-20-2011, 11:10 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,884
Wiki Edits: 0

Thanks: 54
Thanked 628 Times in 558 Posts
Yes, but it takes a really good cylinder head and big cam to do it.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-21-2011, 09:07 AM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,059
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
Awhile back Car Craft magazine wrote an artical of building a 406 with 9.5 compression and got over 500HP with over 500ft lb of torque @ 4500.
I'm not to sure they used. I think Car Craft used AFR 227 Heads with 280H Comp. cam.

Last edited by lg1969; 03-21-2011 at 09:12 AM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-21-2011, 09:09 PM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
406 sbc 9:51

I'm building a 406 sbc . I'm going with pro 1 aluminum heads 200 intake runners and 64cc chambers ,with custom grind cam I'm not sure on the specs ,Srp pistons,egal crank 5.7 H beam rods and a dart air gap intake . I'm hoping to get 500hp out ,do you guys think this is possible ???
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-21-2011, 09:18 PM
Registered User
 
Last photo:
Join Date: Mar 2011
Location: hamilton ont. canada
Age: 39
Posts: 180
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i would lean towards 430hp unless you do some serious david vizard/smoky yunick blueprinting, exotic coatings and very loose bearings.

all the stuff that makes a outstanding race engine but hard to drive street car.

so i think 500 can happen it just all depends on how deep your pocket book is and what your going to use the engine for.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-21-2011, 09:31 PM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What I was looking for was a torque monster ill be on the street more then track . I had a friend tell me that it was impossible to get 500 HP out of a 9:5:1 engine... that's the combo my engine builder gave me so I hope that's what I get
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-21-2011, 10:04 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,884
Wiki Edits: 0

Thanks: 54
Thanked 628 Times in 558 Posts
I'd say your heads aren't big enough, 200cc is on the small side for a big 400. 215-230cc would be a better match.

The 200cc should get you to the 440-460 hp mark unported.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-22-2011, 08:08 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
If this is a street-bound deal, you'd be better off using the heads you have and build it for more torque lower in the power band than to use so much cam that the CR has to be high, looser stall, steeper gears, etc.

If the cam was chosen correctly, you'll have PLENTY of power for the street using those heads. 500 HP is just a number- do not get caught up in a "numbers game"! Build the engine to suit your needs and to hell w/the actual output- again, you will have plenty of power.

And you can tell your buddy that he's wrong on the 500 HP/9.5:1 CR. Like ericnova72 said- it can be done. You might not like the manners on the street, though.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-22-2011, 09:47 AM
OLNOLAN's Avatar
Registered User
 
Last photo:
Join Date: Apr 2009
Location: Louisiana
Posts: 1,082
Wiki Edits: 0

Thanks: 434
Thanked 120 Times in 99 Posts
Good Cookin

Check out this recipe;http://www.hotrod.com/techarticles/e...ine/index.html
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 03-22-2011, 12:26 PM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
406 9:5:1

That's a combo I wanted to go by but my engine builder told me that hydraulic roller were heavy so got me to go with a full roller cam . I believe its crower..
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 03-22-2011, 01:01 PM
psbaker75's Avatar
Registered User
 
Join Date: Mar 2011
Location: riverside, ca
Posts: 60
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Popular hotrodding has an article in the may 2011 issue describing a "streetable" 11.4/1 577 HP 407. Might give you some ideas as to which way you could go... of course it was built for the engine masters challenge, so budget will be a big consideration. Still, there are probably plenty of tips/tricks in there which you could apply to your build.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 03-22-2011, 01:10 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,884
Wiki Edits: 0

Thanks: 54
Thanked 628 Times in 558 Posts
Posting your actual cam specs would make power guesses a lot more accurate.

You do have the makings of a very good street torque engine, I agree with that. It just won't make your 500 hp target if you have to have that big #. Head porting could get you there but cost another $700+
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 03-23-2011, 05:31 AM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
406 9:5:1

I'm working on getting those cam specs
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 03-24-2011, 04:16 PM
Registered User
 
Join Date: Mar 2011
Location: nwi
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
406 9:5:1

My cam is 497 intake and 503 on the exhaust with 268/274 duration
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 03-24-2011, 04:25 PM
Registered User
 
Last photo:
Join Date: Mar 2011
Location: hamilton ont. canada
Age: 39
Posts: 180
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cutlass86
My cam is 497 intake and 503 on the exhaust with 268/274 duration
thats quite small for a big inch motor.

would make a great daily driver tho with excellent street manners.

without forced induction you wont meet your 500 goal.

you need something really hairy for 500 na

unless your duration numbers are at .50 but i dont think so with those lift numbers lift should be in the 550-600 in range depending on your rocker geometry
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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:
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



All times are GMT -6. The time now is 05:16 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.