400 chevy short block with 97 vortec heads????? - 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 08-12-2010, 10:57 AM
jkelly334's Avatar
Registered User
 
Join Date: Jun 2009
Location: eufaula,al.
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
400 chevy short block with 97 vortec heads?????

i own a 1997 chevy z71 pickup with a 5.7 liter vortec 350 engine. I recently owned a 400sbc engine that has been bored .030 with flat 4 valve reliefs. wondering if i could use the short block in my truck and still use the factory fuel delivery system,which is throttlebody injected.if so what would be a nice performance camshaft? Thanks.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-12-2010, 11:10 AM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 9,400
Wiki Edits: 0

Thanks: 29
Thanked 471 Times in 428 Posts
A 400 with flat top pistons and 64cc heads(which the Vortec heads are) will put compression ratio over 11.25-1, way too high for pump gas. Your stock TBI and computer won't like the additional 50 cubes either, you will need a custom computer chip or a chip reflash to even make it work.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-12-2010, 11:33 AM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 937
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
Trust me on this, the regular TBI system is NOT Vortec friendly. We replaced a 95 TBI 305 with a Marine Vortec long block, used a Vortec dual plane intake, and a Holley TBI adapter, (just like the Projection one), and it took bigger injectors, a custom burned chip (twice), and still only ran barely acceptable @ idle. Now out on the road, it ran GOOD, plenty of power, much better fuel mileage than the 305 ever got, but at idle, it would stall, or almost stall, randomly, and all too frequently. We put a Holley 600 carb on it and it ran GREAT, but the 4L60E trans didn't work, so I had to switch it back. It's possible that an adjustable regulator and more fuel pressure may have cured it, or at least made it better, but the owner, my old boss, traded it off when the trans went bad. Not saying you won't be able to make it work, but be prepared for some tuning issues.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-12-2010, 12:36 PM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
I thought the 97 Vortec engine used Multi Port injection, not TBI?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-12-2010, 01:05 PM
Registered User
 
Join Date: Feb 2010
Location: Ohio
Posts: 112
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
'97 aint TBI (not stock anyway)

My 406 w/ vortec heads, comp XE268 cam, 9.2:1, with 454 TBI and 17-18# fuel pressure (needed additional inline pump) ran great. Performer RPM intake and adapter plate-ran fine. On the edge of needing higher stall converter than the GM police car converter (couple hundred rpm over stock). Custom chip with EGR turned off. Very torquey thru middle rpms-great hi-po pickup engine. Very mild lope @ idle.

'93 1500 truck.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-12-2010, 01:12 PM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 937
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by SSedan64
I thought the 97 Vortec engine used Multi Port injection, not TBI?
You are exactly correct sir, I didn't even think about that. The one I was referring to was a 95. 97 would be Multi-port. I know Vortecs work very well with mild bigger cube motors, but with 4 v.r. flat tops, I agree with ericnova72, it would probably have too much compression. Being a 97, (OBDII), you should be able to do your own programming though.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-12-2010, 01:22 PM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
Yep, much easier with MPI. Would definitely need 14-18cc D-Dish pistons.
With the 4VR pistons Cr would be about 11.7Cr, w/0 Deck & .040" gasket.
With 14cc Dish = 10.6Cr
18cc = 10.15
20cc = 10.00
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-12-2010, 02:50 PM
jkelly334's Avatar
Registered User
 
Join Date: Jun 2009
Location: eufaula,al.
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thank for the correction. It is Multi-port Injection. So would it work with dish top 20cc pistons and programmer

Last edited by jkelly334; 08-12-2010 at 02:57 PM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-12-2010, 03:23 PM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 937
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
Be sure it's the D-shaped dish though, that way, you keep the squish and quench,
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-13-2010, 01:57 PM
FastOrange's Avatar
Registered User
 
Join Date: May 2010
Location: Canada
Posts: 236
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by SSedan64
I thought the 97 Vortec engine used Multi Port injection, not TBI?
not quite MPFI, but CSFI, still it will not like the new engine.
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
the history of chevy v8's savman1 Hotrodders' Lounge 43 03-02-2012 06:57 PM
Building A 302 Chevy Scorpio Shaping Flow Hotrodding Basics 6 01-16-2007 05:55 AM
Chevy Small Block Heads druss32 Engine 17 05-10-2006 08:35 PM
97 350 vortec install into 1981 chevy 4x4 gnrlewis Engine 1 10-27-2005 09:17 PM
chevy 400 block??? chevelle434 Engine 8 02-14-2005 12:05 PM


All times are GMT -6. The time now is 04:32 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.