Big Block Chevy Horse Power Build - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans Advertise
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 12-23-2010, 06:05 PM
d^2 d^2 is offline
Registered User
 
Join Date: Dec 2010
Location: Townsend
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Big Block Chevy Horse Power Build

Howdy

I am looking at building a Big Block Chevy for my '72 GMC 3/4 ton 4X4 with

factory A/C and posi traction. What cubic inch motor would be best to get

good fuel economy AND horse power? Is it possible to get

good economy and be able to run on pump gas? Will a 396 w/ 9.6:1

compression get better economy than a 454 w/ 9.6:1 compression? How can

I get over 400 horse power out of a 396 w/ a mild cam?



Thanks













    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-23-2010, 06:10 PM
matts37chev's Avatar
& matts38chev
 

Last journal entry: Try again
Join Date: Jan 2009
Location: Shelton,Wa.
Posts: 2,668
Wiki Edits: 0

Thanks: 186
Thanked 125 Times in 110 Posts
ive always gone with the bigger the motor is, the less pedal you need to make it go.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-23-2010, 07:10 PM
Registered User
 
Join Date: May 2009
Location: S/E Michigan
Posts: 650
Wiki Edits: 0

Thanks: 0
Thanked 10 Times in 10 Posts
You can use a smaller cam and heads on a 454 and get 400hp, the same HP from a 396 will require bigger heads and cam(more fuel use). MPG will be more related to low cruise rpm(overdrive) and good vacuum signal.
Reply With Quote Quick reply to this message
 
  #4 (permalink)  
Old 12-23-2010, 07:36 PM
matts37chev's Avatar
& matts38chev
 

Last journal entry: Try again
Join Date: Jan 2009
Location: Shelton,Wa.
Posts: 2,668
Wiki Edits: 0

Thanks: 186
Thanked 125 Times in 110 Posts
sounds like the perfect time for a peanut port headed 454
and that should be easy to find
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-23-2010, 08:56 PM
Banned
 
Join Date: Jun 2005
Location: St. Louis, MO
Age: 34
Posts: 9,527
Wiki Edits: 0

Thanks: 20
Thanked 405 Times in 378 Posts
You need to be more specific with your goals/combo. I may consider a stock 454 with an rv cam and headers to be perfect for your application, or a $25,000 very well built and tuned 572.

Desired mpg's? Budget? Truck details?



Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 12-24-2010, 03:31 PM
Member
 
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 55
Posts: 4,018
Wiki Edits: 0

Thanks: 0
Thanked 26 Times in 26 Posts
here you go.

http://www.chevyhiperformance.com/te...ild/index.html

a 385HP 396 build.

do the same with a 454 and make 440hp due to 14% more engine.

I use a 396 and a 454 in my c10 truck (not at the same time). Both engines are built the same way (mild) and the 454 has noticeable more power and gets better mpg (1 mpg better) as compared to the 396.

As for BBC's, I recommend that you build a 454 and use some good cylinder heads.

FYI, good fuel economy and big block chevy don't belong in the same sentence. My 4200 pound truck with a 3.08 gear and th400 trans gets 8 to 9 city and 12 to 14 highway (depending on speed). I would guess a 3/4 ton 4x4 would get 6 to 7 city and 9 to 10 highway with a bbc.

If you need 400hp and good mpg then you would be better off building a late model LS engine.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 12-24-2010, 03:44 PM
techinspector1's Avatar
Member
 
Last wiki edit: DynoSim combinations
Join Date: Oct 2005
Location: Zephyrhills, Florida, USA
Age: 77
Posts: 16,982
Wiki Edits: 326

Thanks: 1,919
Thanked 2,830 Times in 2,117 Posts
Quote:
Originally Posted by 454C10
As for BBC's, I recommend that you build a 454 and use some good cylinder heads.
Roger that. Start with the larger 4.250" or bigger bore. The smallish bore of a 396 cannot possibly allow the flow that a larger bore can due to shrouding of the valves.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 12-24-2010, 06:03 PM
d^2 d^2 is offline
Registered User
 
Join Date: Dec 2010
Location: Townsend
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
383

Howdy

Thanks for all them there speedy replies. Would I be better off with a 383

stroker? What type of fuel economy would I get with a 700R4 behind it?


Thanks






Hey, is that a 9mm? That's nothing compared to this 44 magnum.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 12-24-2010, 06:54 PM
techinspector1's Avatar
Member
 
Last wiki edit: DynoSim combinations
Join Date: Oct 2005
Location: Zephyrhills, Florida, USA
Age: 77
Posts: 16,982
Wiki Edits: 326

Thanks: 1,919
Thanked 2,830 Times in 2,117 Posts
Quote:
Originally Posted by d^2
What type of fuel economy would I get with a 700R4 behind it?
If you ask about fuel economy one more time while discussing big block Chevies and stroker cranks, I'm gonna double up and puke on my keyboard. HOLY JESUS!!!! Buy a freekin' Honda and have it over with. Enough is enough.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 12-25-2010, 05:43 PM
d^2 d^2 is offline
Registered User
 
Join Date: Dec 2010
Location: Townsend
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
383

Me Like Strokers

P.S.
Send me a picture when you puke
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 12-25-2010, 06:16 PM
Registered User
 
Join Date: Feb 2010
Location: new brunswick,canada
Posts: 98
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
build a 496 torque monster or a 427 screamer. im trying to decide which would be better for my mud monster right now lol have a 427 TD to play with.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 12-25-2010, 07:45 PM
Registered User
 
Last wiki edit: Mopar tapered axle rear brake conversion
Last journal entry: What I'm doing now...
Join Date: Jan 2002
Posts: 4,259
Wiki Edits: 49

Thanks: 0
Thanked 9 Times in 8 Posts
Quote:
Originally Posted by d^2
Howdy

I am looking at building a Big Block Chevy for my '72 GMC 3/4 ton 4X4 with

factory A/C and posi traction. What cubic inch motor would be best to get

good fuel economy AND horse power? Is it possible to get

good economy and be able to run on pump gas? Will a 396 w/ 9.6:1

compression get better economy than a 454 w/ 9.6:1 compression? How can

I get over 400 horse power out of a 396 w/ a mild cam?



Thanks
So is this the same 396 that you lied about in your other thread?? Oh, I'm looking at buying this motor is it priced right? Then it winds up being your motor and you're trying to sell it in the forums.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 12-26-2010, 12:13 PM
zildjian4life218's Avatar
Listen and Learn
 
Last wiki edit: DIY junkyard electrical fan controller
Last journal entry: SBC 305 Twin Turbo
Join Date: Dec 2008
Location: WNY/Rochester, New York
Age: 30
Posts: 1,786
Wiki Edits: 7

Thanks: 72
Thanked 27 Times in 24 Posts
I second the ls motor. The GM 6.0l lq9 makes like 385hp from the factory and I believe the lq4 makes a little less. On that horsepower tv they did a 6.0 with cam and intake and made close to 500hp.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 12-26-2010, 02:33 PM
d^2 d^2 is offline
Registered User
 
Join Date: Dec 2010
Location: Townsend
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Do the LS's have different motor mounts? Is the bell housing the same? What would it take to convert a truck set up for a normal sbc to a LS series motor?



Thanks
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 12-29-2010, 09:53 AM
Registered User
 
Join Date: Dec 2010
Location: Townsend
Posts: 45
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
Liar !!!!!
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:
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:
Insurance
Please select your insurance company (Optional)

Log-in



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
Need small block chevy build ideas would like around 500 horse ssmonte Engine 17 08-03-2011 02:25 PM
horse power torque estiment.72 chevy andrew400tpi Engine 4 11-19-2009 08:58 PM
327 build horse power guestimation inbredjedd Hotrodding Basics 2 07-11-2009 08:01 AM
How Much Horse Power Will I Make 350 Chevy davekreis Engine 5 03-02-2006 05:32 PM
big block buick horse power Al Combs Hotrodders' Lounge 2 05-23-2003 10:17 AM


All times are GMT -6. The time now is 01:02 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.