Chevy 400 smallblock - 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 04-18-2006, 05:09 PM
Registered User
 
Join Date: Apr 2006
Location: albany ny
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Chevy 400 smallblock

ok, I just got a late 70's smallblock 400 from my buddy.What could i do with this?. Its going in the 79 Camaro I have. I just want the car to be violent from a light but keep it as low budget as possible. I have acess to many smallblock parts, 350's mostly. I also heard the heads were junk on these motors. would bowtie heads help? thanks -Jake

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-18-2006, 06:10 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,988
Wiki Edits: 326

Thanks: 768
Thanked 1,026 Times in 858 Posts
Quoted from Car Craft, describing a motor combination.....
"That engine was a 406 ci small block with Vortec iron heads, an Edelbrock Performer RPM Air Gap intake, a 750 Holley double pumper carb and a mild Lunati hydraulic flat tappet cam. The single-pattern cam spec'd out with 230 degrees of duration at 0.050" tappet lift, 0.480" lift and a 109 degree lobe separation angle. The engine was also fitted with small 1 5/8" headers and on Duttweiler's dyno made an amazing 525 lbs/ft of torque at 3,500 and grunted out 471 lbs/ft at 2,300. Horsepower was acceptable with 428 at 5,000. The limiting factors to more horsepower were twofold. First, Vortec heads are exhaust port limited, so using a camshaft with about 10-12 degrees more exhaust duration and a little more lift would have helped. Second, to accomodate this additional lift, mods to the heads would be required with better valvesprings as well. You can purchase a set of Vortecs already modified with more retainer-to-seal clearance and better springs (PN SD8060A) from Scoggin-Dickey for $680 ready to bolt on. As for the cam, we'd go with a flat tappet hydraulic cam with specs of around 230/240 @ 0.050" with lift around 0.480"/0.510" and a 110-112 degree lobe separation angle."

If using 5.7" rods, you'd want to use a small base circle cam and longer pushrods. Using a KB168 Keith Black piston (22 cc dish), zero deck, 0.040" compressed gasket and the 64 cc Vortecs, your static c.r. would be 9.78:1

Remember to drill the Vortecs to match the 400 block steam holes and use a 400 head gasket.

Bolt a 2,500-3,000 stall converter to the back of this motor with a 3.73 gear in the rear.

Last edited by techinspector1; 04-18-2006 at 06:16 PM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-18-2006, 06:14 PM
Warrant's Avatar
72 Nova, 65 Rambler, 37 Chevy
 
Last photo:
Join Date: Dec 2005
Location: Utah
Age: 24
Posts: 337
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Im basically doing the same thing you are, at first I was thinking of going with Stout bottom end with vortec heads with about 10:1 CR, Comp XE274, with air gap and holley - thats 500FTLBS territory. But after researching it up and planing everything out, it seems that vortecs are a little pain and can drain your wallet fast, example: you need to get em machined for more lift or pay extra for them already set up, then you need self align rockers, and vortec intake which is more $$, then you need center bolt valve covers(which I think are soo ugly, but maybe on ur car wouldn't look so bad), and special bolts, and I even think you need a new alternator bracket on some of them, hell it practically goes on and on. So now I thinking of getting Sportsman or Iron Eagles, maybe even the lower cost TFS aluminum heads. Here is some good links that may help you, check out the price comparison of vortecs at the bottom page of the first link.

http://www.2quicknovas.com/vortecheads.html
http://www.chevyhiperformance.com/te...13/index1.html
http://www.chevyhiperformance.com/te.../148_0306_406/
http://chevyhiperformance.com/howto/97458/
http://www.chevyhiperformance.com/techarticles/76178/
http://hotrod.com/techarticles/66278/

the 383 combos probably will work even better on a 400, and notice the vortecs and how much power they make - stock! BTW upgraded lift vortecs are $500.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-18-2006, 06:20 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,988
Wiki Edits: 326

Thanks: 768
Thanked 1,026 Times in 858 Posts
"BTW upgraded lift vortecs are $500."

Nope, $680 for the pair.

Warrant, I can appreciate what you're saying, but the downsides you mention would be very much acceptable to me to bolt on a set of heads with the potential of the Vortecs. That's just my opinion.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-18-2006, 06:44 PM
Warrant's Avatar
72 Nova, 65 Rambler, 37 Chevy
 
Last photo:
Join Date: Dec 2005
Location: Utah
Age: 24
Posts: 337
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I agree, vortecs are amazing, huge power from a stock head without even messing with them (with the exception of the lift and pushrod holes to be enlarged) and pretty inexpensive too.

But again you could buy the vortecs for $680 and extra for manifold ~$30, covers ~#50, and rockers ~$130 and some other stuff. Thats pushing $900. And the Aluminum TFS 23* heads are 850-950 (I think). Their you can get benefits of weight savings and able to run more Compression

Its something to think about, just making suggestions and ideas

And I thought somewhere I saw that upgraded vortecs were $500 flat, maybe I read it wrong.

oh yea heres another link: http://www.chevyhiperformance.com/techarticles/46438/ It is a 350, but vortec and the TFS are tested on it...look through part I, II, etc.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 04-18-2006, 10:54 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,988
Wiki Edits: 326

Thanks: 768
Thanked 1,026 Times in 858 Posts
Quote:
Originally Posted by Warrant
I agree, vortecs are amazing, huge power from a stock head without even messing with them (with the exception of the lift and pushrod holes to be enlarged) and pretty inexpensive too.

But again you could buy the vortecs for $680 and extra for manifold ~$30, covers ~#50, and rockers ~$130 and some other stuff. Thats pushing $900. And the Aluminum TFS 23* heads are 850-950 (I think). Their you can get benefits of weight savings and able to run more Compression

Its something to think about, just making suggestions and ideas

And I thought somewhere I saw that upgraded vortecs were $500 flat, maybe I read it wrong.

oh yea heres another link: http://www.chevyhiperformance.com/techarticles/46438/ It is a 350, but vortec and the TFS are tested on it...look through part I, II, etc.
Thanks for that Warrant. Makes sense to me
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 04-19-2006, 02:17 AM
Member
 
Join Date: Apr 2004
Location: carmichael, CA
Age: 39
Posts: 91
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
you could do something thats not too popular and de stroke it with a 350 crank and make a 377. Thats what I`m building except I have a Scat crank with the 400 mains and a 3.5" stroke. I get alot of negative input about this motor but it`s what i want and it`ll run great.
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
chevy 400 block??? chevelle434 Engine 8 02-14-2005 12:05 PM
rebuilding my chevy 400 B-Body-MAN Engine 2 11-28-2004 08:19 PM
chevy 400 cid vortec tune port brnrubr Engine 1 11-20-2002 07:33 PM
Horesower for a 78 Chevy SB 400 sciaretta1250 Engine 3 11-14-2002 09:43 PM
Small Block Chevy 400 flexplate install novajohnb Engine 2 10-31-2002 03:53 PM


All times are GMT -6. The time now is 11:03 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.