Combination help I'm trying to build a 400sbc street/strip - 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 08-15-2012, 12:38 AM
Registered User
 
Join Date: Jul 2012
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Combination help I'm trying to build a 400sbc street/strip

I'm trying to build a street/strip 400sbc been looking at allot of forums and asking questions just trying to reach out and get a few pointers/routes to go wanna be at least 11.1 compression.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-15-2012, 04:52 AM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
You can set it up for 11:1 cr with pump gas but the cam would need to be on the edge of being streetable (big cam). And big cams require lots of stall and gear. What are you gear and stall converter plans?

If you plan to use pump gas and drive it on the street I would limit cr to 10.5:1. There isn't much gain in power going that extra 0.5 cr but it does cause lots of tuning issues.

Read this 406 combo. makes almost 500hp with 87 octane.

Chevrolet 406 CI Engine Build - Chevy High Performance
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-15-2012, 06:20 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 28
Posts: 8,611
Wiki Edits: 0

Thanks: 15
Thanked 273 Times in 255 Posts
Fwiw 500hp is about the reliable limit of a stock 400 block, even at that id do a partial block fill and be sure to use light components, a long rod, and a perfect balance job- assuming your wanting some longevity.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-15-2012, 08:38 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,347
Wiki Edits: 0

Thanks: 289
Thanked 703 Times in 679 Posts
what car and what E.T.s are you looking for? start with the heads and work from there.Whats been done to the cars suspension and gearing,what tires?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-15-2012, 11:02 AM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,656
Wiki Edits: 0

Thanks: 3
Thanked 399 Times in 346 Posts
Quote:
Originally Posted by Jtaylor88 View Post
I'm trying to build a street/strip 400sbc been looking at allot of forums and asking questions just trying to reach out and get a few pointers/routes to go wanna be at least 11.1 compression.
Why so much compression? In and of itself 11 to 1 is easy to get, but what is the goal of the engine and what is the rest of the configuration you're thinking about?

Bogie
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-19-2012, 11:13 PM
Registered User
 
Join Date: Jul 2012
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
my plans are a street/strip type combination Im gonna bore it over to a 406 and its going into a monte carlo ss i think i wanna change the 3;73 gears some say i might need a stronger rear this is my first engine build
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-19-2012, 11:55 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,347
Wiki Edits: 0

Thanks: 289
Thanked 703 Times in 679 Posts
JT,what kind of car? what transmission is in the car?Are you going to race it as a bracket car? what bracket? Is your budget small? How much time do you have to build the motor?Are you doing all the work yourself?
please answer the questions so you can get started,,
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-20-2012, 06:59 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,463
Wiki Edits: 0

Thanks: 2
Thanked 323 Times in 320 Posts
11:1 is too high for pump gas.

You want 10:1 to 10.5:1 for 92 octane pump gas.

406 with 64cc cylinder heads use a -18cc D dished piston

406 with 70-75cc cylinder heads use a -7cc flat top piston.

Get this right.

(based on a O decked block)

Any of the good NAME BRAND 195cc to 230cc aluminum cylinder heads will get it done.
Brodix, AFR, Profiler etc.

Dual plane RPM or single plane Vic JR manifold, your choice.

Use a 750-850cfm carb.

Use 5.7" connecting rods.

Camshaft: Cool Crane street strip mechanical Saturday Night Special
F-244/3454-2S-6 Crane #110921 Can use 1.5 or 1.6 ratio rockers

Your 3.73's are fine w a short 26" DOT drag tire Get a 10" 3500+ stall converter.
1-5/8" 1-3/4" haders dual exhaust

The rest is easy.

Last edited by F-BIRD'88; 08-20-2012 at 07:16 AM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-20-2012, 07:17 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,463
Wiki Edits: 0

Thanks: 2
Thanked 323 Times in 320 Posts
You do not need a "block fill"

Monte rear end:
Replace the stock GM differential with a new 7.5" Auburn Gear or Eaton Posi.
All thats required is replaceing the posi (swap the ring gear onto the new posi diff and resetting the ring pinion gear back lash.
(.006" to .012" for used gears)
Get a drive shaft loop and some Airlift Air Bags (Drag Bags)
Replace the stock driveshaft universal joints with new. You are good to go for 11sec 1/4 miles.
A rebuilt th350 trans and 3500 stall is your best bet.

Last edited by F-BIRD'88; 08-20-2012 at 07:33 AM.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-21-2012, 08:27 PM
Registered User
 
Join Date: Jul 2012
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Its Gonna Be A Street/Strip 1987 Chevy Monte Carlo Ss Mostly Going To Be Driven As A Weekend Hotrod That Packs Power If I Have To Mixed Gas Thats Fine My Budget Is 6-7k
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-22-2012, 11:13 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,463
Wiki Edits: 0

Thanks: 2
Thanked 323 Times in 320 Posts
You will find over time that building a street/strip motor with more compression ratio than what the local street premium pump gas will support gets old real fast. Why build a motor that needs expensive fuel and or retarded spark timing to avoid knock and engine damage that decreases real street performance and shortens engine life?
It's not nessessary.

With your budget you can go to a similar duration Crane mechanical Street roller cam.
Build it with a real 10.5:1 compression ratio. You will go fast on the street and at the track without the fuss.
You can build a mean mean , fast street/track performer around a 10.50:1 compression ratio using the AFR 195 Street Eliminator heads
and a Crane street Roller.

Excessive compression ratio is one of the most common mistakes.

Last edited by F-BIRD'88; 08-22-2012 at 11:21 AM.
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:
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
street/strip s10 build HELP kennyhammond Hotrodding Basics 2 12-14-2011 08:46 PM
383 stroker build (street/strip) polkiewicz Hotrodding Basics 5 11-04-2011 10:57 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
350 Street/Strip Build (Need Advice) Dreadhead Engine 22 11-04-2010 12:52 PM
350 Street/Strip Build (Need Advice) Dreadhead Engine 2 11-04-2010 10:00 AM


All times are GMT -6. The time now is 05:50 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.