Good recipe for a 500 hp sb 400 chevy - 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 01-29-2005, 01:17 PM
Littlered wagon's Avatar
New Member
 
Join Date: Jan 2005
Location: newyork
Age: 47
Posts: 26
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Good recipe for a 500 hp sb 400 chevy

Anybody built a 400 sbc lately would like some good pointers on this build.I allready have flat top Wiseco pistons & 4340 5.7 H beam rods plus a 284 crane hyd.roller cam any thoughts

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-29-2005, 01:32 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,895
Wiki Edits: 5

Thanks: 20
Thanked 258 Times in 211 Posts
My thought is, that tis belongs in the engine forum, so I am moving it.....................and welcome.
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-29-2005, 01:41 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,130
Wiki Edits: 0

Thanks: 25
Thanked 267 Times in 250 Posts
The secret is good cylinder heads!! Aftermkt. Good flow numbers.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-29-2005, 02:01 PM
Littlered wagon's Avatar
New Member
 
Join Date: Jan 2005
Location: newyork
Age: 47
Posts: 26
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Oops rookie computer user
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-29-2005, 03:19 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
It is going to really depend upon what you want to do with the engine and how much you want to spend.

Is it a street engine? Will it burn pump fuel? What are your budget concerns? What kind of vehicle are you going to put it in?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-29-2005, 03:55 PM
Mad Maggot's Avatar
The lean mean donut machine
 
Last photo:
Join Date: Aug 2004
Location: Red Deer, Alberta, Canada
Age: 31
Posts: 386
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
With that cam, take a set of AFR 195cc heads, an Edelbrock RPM Air Gap manifold, a 750cfm carburetor and a good exhaust system with headers and you should be well on your way.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-29-2005, 04:47 PM
OddRodder's Avatar
CORNFED and INBRED !?!
 
Join Date: Jan 2003
Location: Springfield, MO.
Age: 53
Posts: 612
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I would go with Dart Iron Eagles (200cc). On the street, with premium fuel, you should be able to run close to 10to1 compression with flat tops and a tight quench (around .040) without detonation problems.

Last edited by OddRodder; 01-29-2005 at 10:58 PM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-29-2005, 10:29 PM
Mad Maggot's Avatar
The lean mean donut machine
 
Last photo:
Join Date: Aug 2004
Location: Red Deer, Alberta, Canada
Age: 31
Posts: 386
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I don't know about the Iron Eagles... they don't really flow all that well. You would be challenged to make 500 HP with a set of those heads, unless you use a very aggressive solid roller cam. Chevy Hi Performance Magazine did a flow bench comparison of all the major heads, and the Iron Eagles were quite short on the numbers.

http://chevyhiperformance.com/techarticles/41598/

A good rule of thumb is with roller cams, you generally multiply the .500 valve lift flow number by two to get a horsepower estimate. For 500 HP you will need a 250cfm head.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-30-2005, 12:26 AM
bracketeer's Avatar
489 Lemans
 

Last journal entry: Street Legal
Last photo:
Join Date: Dec 2004
Location: Courtenay, BC, CehNehDeh
Age: 55
Posts: 2,139
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Dart Iron Eagles (200cc). On the street, with premium fuel, you should be able to run close to 10to1 compression with flat tops
He said 400 not 350.
64 cc 11.2 to 1
70 cc 10.8 to 1
72 cc 10.6 to 1
stock head 10.2 to 1
__________________
[URL]http://members.shaw.ca/g.body.building[/URL]
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-30-2005, 12:27 PM
firestone's Avatar
http://teamrfc.gospelcom.net
 
Last photo:
Join Date: Nov 2003
Location: Fenton MI
Age: 32
Posts: 1,743
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I agree with the AFR 195's. Anything less, and you will be really hard pressed to get 500 hp.

Adam
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-30-2005, 12:36 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
You will be hard pressed to make 500 horsepower period with pump fuels. I know everyone is going to argue the point, but I would think 450 horsepower is going to be more realistic.

A top engine builder could do it, but it would take alot of intricate work to extract that much power out of it without bumping the compression up considerably or using a touch of nitrous.

I would probably use a compression ratio of 9.5:1 (true), a set of fully ported Vortec iron heads, a healthy hydraulic roller or flat lifter cam (108 lsa, .520 lift range, and about 235 deg duration @.050 with a little extra on the exhaust side.) Either a Performer RPM or Victor Jr, and minimum 750 Holley type carb. Cam specs given here are ballpark.

I would arm it with a very small nitrous kit to achieve the 500 horsepower mark.

An engine like the one listed above would be very streetable, make good torque, and run on pump fuel, and would be economical to build.

That's how I would do it, but there are other ways, depending upon your tastes and wallet size.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-30-2005, 01:21 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 37
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
500 is easy on pump gas. All it takes is 9.5:1 or higher compression, a good set of heads, a good cam, and all the bolt-ons. 400s put out a lot of power and torque. A lot more than a similarly built 350.

The 400 kind of reminds me of my 5.0. They are both pretty restricted from the factory. All it takes is a little more breathing and they wake up fast.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-30-2005, 02:33 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally posted by lluciano77
500 is easy on pump gas. All it takes is 9.5:1 or higher compression, a good set of heads, a good cam, and all the bolt-ons. 400s put out a lot of power and torque. A lot more than a similarly built 350.

The 400 kind of reminds me of my 5.0. They are both pretty restricted from the factory. All it takes is a little more breathing and they wake up fast.
I'll disagree with you. It's not just a matter of slapping a bunch of parts together to get that kind of power. At least the dyno I've used never saw those kind of power levels on street 400's.

Most circle track engines I've built (and I'm talking about 11.5:1-12.0:1 compression, a baseline Comp 285B-6 race cam, World 200 Sportsman heads and tricked up carb usually made around 450 real horsepower. Maybe our dyno was too conservative (Stuska), but I think that horsepower numbers are thrown around these days quite arbitrarily. Too many pie in the sky desktop dyno numbers or inflated magazine articles out there in my opinion.

500 is not super easy to get on a STREETABLE 400 small block. I'm not saying you can't do it, but you won't do it really cheap and you'll have to really tweak it and work with it.

If you have spent any time around a race shop with a dyno, you would figure that one out in a real hurry. I've seen many "powerful" engines disappoint their owners. I think it's a product of hype when it comes to quoted power figures.

Take into accouunt that the factory street hemi with mega-flow heads, solid cam, 10.25:1 compression and two four barrells only produced an actual 475 horsepower, or the LS-6 454 spewed out an actual 450 horsepower.
(pretty accurate numbers), I've dynoed some muscle car engines for muscle car drags, and can attest that those numbers were pretty accurate. A 400 small block is not quite the foundation of a hemi or rectangular port 454.

I'm not trying to be argumentative here, but I see all of this talk like it's easy to do it, when it's not quite that easy.

It's going to disappoint some novice engine builders when they barely make 400 ponies and they thought they woud make an easy 500.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-30-2005, 02:44 PM
OddRodder's Avatar
CORNFED and INBRED !?!
 
Join Date: Jan 2003
Location: Springfield, MO.
Age: 53
Posts: 612
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Still need to know what littlered wagon plans to use this engine for? The easied way to accomplish the goal of 500h.p. is as NAIRB suggested, with a mild engine and a small shot of N.O.S. But, if you want to make an honest 500+ h.p. with motor only, this is a good article to duplicate!

http://chevyhiperformance.com/techarticles/90719/

I agree that dyno results are sometimes confusing, different numbers from different machines, throw in chassis dyno's that measure the rear wheel h.p. and things get even more confusing!

Last edited by OddRodder; 01-30-2005 at 02:50 PM.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-30-2005, 03:01 PM
Mad Maggot's Avatar
The lean mean donut machine
 
Last photo:
Join Date: Aug 2004
Location: Red Deer, Alberta, Canada
Age: 31
Posts: 386
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I agree with NAIRB that making 500 streetable horsepower is difficult, but with a 400 SBC, a big roller cam and some great flowing heads should get the job done. Of course, it may require a high stall and maybe a vacuum pump for the accessories, but it will still remain streetable. When building a monster motor like this, you can't skimp on anything and you'd better be prepared to shell out a lot more cash for it than you may think it would cost. Retro-fit roller cams are very expensive, as are the AFR heads.
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



All times are GMT -6. The time now is 12:32 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.