5.7 TBI to Carb? - 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 02-15-2004, 06:28 AM
S10Fan's Avatar
Garage Filler
 

Last journal entry: I need more time!
Last photo:
Join Date: Oct 2003
Location: Newport News Virginia
Age: 57
Posts: 302
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
5.7 TBI to Carb?

I have an 87 to 95 5.7 (350) TBI motor that I would like to convert to a Carburetor setup. The motor will be used in my 87 S-10. I realize Iíll need to make some changes to the fuel tank (fuel pump) and add an external electric pump but my main question is about the intake manifold. The 2 center bolts for the intake are at a different angle than earlier small blocks. Could I re-drill my intake (Edlebrock Performer) and make it work?

Thanks!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-15-2004, 06:46 AM
NorthStar's Avatar
Member
 
Last photo:
Join Date: Feb 2003
Location: Minnesota
Age: 51
Posts: 847
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I think Edelbrock makes a Performer intake for those heads about the only one to choose from nobody else does. Also you could run a regulator to lower your fuel pressure and not do anything with the gas tank. You would have to change some wiring on the relay though.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-15-2004, 10:52 AM
S10Fan's Avatar
Garage Filler
 

Last journal entry: I need more time!
Last photo:
Join Date: Oct 2003
Location: Newport News Virginia
Age: 57
Posts: 302
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Thanks for the advice. I was wondering about using a regulator on the existing fuel pump.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-15-2004, 04:03 PM
Seon's Avatar
Member
 
Join Date: Jul 2002
Location: Northern Ca
Posts: 275
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What distributor are you going to use? I hear that if you use an HEI, you'll need to change the gear?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-15-2004, 05:51 PM
Member
 
Join Date: Oct 2003
Location: Arkansas
Posts: 413
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
What distributor are you going to use? I hear that if you use an HEI, you'll need to change the gear?
You are referring to roller cam engines. If its hyd. cam it'll be fine.

If you already have the old style intake, you can elongate the center holes and it'll work just fine.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-15-2004, 05:55 PM
badknuckles's Avatar
you talkin to me?
 
Join Date: Nov 2003
Location: fort lewis, wa
Age: 33
Posts: 1,094
Wiki Edits: 0

Thanks: 3
Thanked 0 Times in 0 Posts
actually on the factory roller motors from gm you dont need a bronze distributor gear.
you could run a 4-5 pd regulator with the feul pump and you can re drill your intake to work on those heads.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-15-2004, 06:22 PM
S10Fan's Avatar
Garage Filler
 

Last journal entry: I need more time!
Last photo:
Join Date: Oct 2003
Location: Newport News Virginia
Age: 57
Posts: 302
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Thanks for all the replies. If you guys keep answering my questions this quickly I won't be able to put off doing the work! LOL!
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-15-2004, 06:23 PM
badknuckles's Avatar
you talkin to me?
 
Join Date: Nov 2003
Location: fort lewis, wa
Age: 33
Posts: 1,094
Wiki Edits: 0

Thanks: 3
Thanked 0 Times in 0 Posts
there is always something to keep you from working
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-15-2004, 06:42 PM
Member
 
Join Date: Aug 2002
Location: Las Vegas
Age: 64
Posts: 175
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I'm not trying to be impolite but may I ask why you are deep sixing the TBI? I'm scouring the junk yards, trying to gather all of the bits and pieces to install a TBI unit on my stock 455 Olds! Frankly, I'm more than sick of my carb. You don't know this yet but that TBI has spoiled you. With the carb, you get to pump the throttle several times in the morning and have clouds of sooty black smoke choke you while the auto is warming up. And untill it gets darn good and ready, the motor will sputter and beltch and cough and might even flat die as soon as you put it in gear. If God forbid, you don't give the carbed auto a good warm up and try to pull into traffic, you'll end up spilling your large coffee moca that you got from Starbucks, all over your pants (try and explain that huge wet spot when you get to the office!). Also, you won't be able to afford that morning Starbucks because of the degraded gas milage, costing you a few bucks more a week. Sure, you can get your trusty shirt pocket screw driver and tune the carb's idle screws and choke in the morning but why bother, we are out of the stone age, let the O2 sensor and the computer do the tuning for you and enjoy your coffee while your engine purrs like a kitten from start up to when you pull into your gagage at the end of the day.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-15-2004, 06:52 PM
bondo's Avatar
Member
 
Last photo:
Join Date: Nov 2002
Location: Chaumont Bay N.Y.
Posts: 960
Wiki Edits: 0

Thanks: 7
Thanked 15 Times in 15 Posts
Quote:
I'm not trying to be impolite but may I ask why you are deep sixing the TBI? I'm scouring the junk yards, trying to gather all of the bits and pieces to install a TBI unit on my stock 455 Olds! Frankly, I'm more than sick of my carb. You don't know this yet but that TBI has spoiled you. With the carb, you get to pump the throttle several times in the morning and have clouds of sooty black smoke choke you while the auto is warming up. And untill it gets darn good and ready, the motor will sputter and beltch and cough and might even flat die as soon as you put it in gear. If God forbid, you don't give the carbed auto a good warm up and try to pull into traffic, you'll end up spilling your large coffee moca that you got from Starbucks, all over your pants (try and explain that huge wet spot when you get to the office!). Also, you won't be able to afford that morning Starbucks because of the degraded gas milage, costing you a few bucks more a week. Sure, you can get your trusty shirt pocket screw driver and tune the carb's idle screws and choke in the morning but why bother, we are out of the stone age, let the O2 sensor and the computer do the tuning for you and enjoy your coffee while your engine purrs like a kitten from start up to when you pull into your gagage at the end of the day.
Maybe, Just Maybe, S10Fan is a person who Knows How to Set-Up,+ Tune a Carb...............

Obviously You Don't fall into that catagory.......
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-15-2004, 06:58 PM
Member
 
Join Date: Aug 2002
Location: Las Vegas
Age: 64
Posts: 175
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I'd reply to your post about not having a clue as to the art of carb tuning but I'm too busy washing my coffee stained paints!
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 12-06-2004, 09:25 PM
chrisflock's Avatar
Member
 

Last journal entry: A quick trip
Last photo:
Join Date: Jun 2004
Location: wisconsin
Posts: 170
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by dallam1
I'm not trying to be impolite but may I ask why you are deep sixing the TBI? I'm scouring the junk yards, trying to gather all of the bits and pieces to install a TBI unit on my stock 455 Olds! Frankly, I'm more than sick of my carb. You don't know this yet but that TBI has spoiled you. With the carb, you get to pump the throttle several times in the morning and have clouds of sooty black smoke choke you while the auto is warming up. And untill it gets darn good and ready, the motor will sputter and beltch and cough and might even flat die as soon as you put it in gear. If God forbid, you don't give the carbed auto a good warm up and try to pull into traffic, you'll end up spilling your large coffee moca that you got from Starbucks, all over your pants (try and explain that huge wet spot when you get to the office!). Also, you won't be able to afford that morning Starbucks because of the degraded gas milage, costing you a few bucks more a week. Sure, you can get your trusty shirt pocket screw driver and tune the carb's idle screws and choke in the morning but why bother, we are out of the stone age, let the O2 sensor and the computer do the tuning for you and enjoy your coffee while your engine purrs like a kitten from start up to when you pull into your gagage at the end of the day.
That's an exact description of what most TBI engines (that I've seen) do.

And it is usually a lot cheaper to switch to carb than fix a TBI system, unless you can score a free one that actually works right.

TBI is great, except when it breaks. I mean, what happens when the ol' ECU gives out? And don't tell me they don't, because they do. All computer hardware does eventually; it's the nature of semi-conductor chips.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 12-06-2004, 10:35 PM
ChevelleSS_LS6's Avatar
Jeep XJ and a Javelin
 
Last wiki edit: Compression test
Last journal entry: August 9, part III
Last photo:
Join Date: Dec 2001
Location: Grand Rapids, Michigan
Age: 28
Posts: 1,610
Wiki Edits: 7

Thanks: 3
Thanked 0 Times in 0 Posts
dont tell me fuel injection isnt all its made to be. My '71 briggs 8hp starts faster than a puddle of gas and a dropped match, even when it's around freezing outside if the carb is tuned right and all.

My car takes about a second to start one it gets cranking, and that's a sequential f.i. car.

gas mileage and performance isn't terribly different unless the carb is mismatched for the engine or poorly tuned.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 12-07-2004, 03:52 AM
S10Fan's Avatar
Garage Filler
 

Last journal entry: I need more time!
Last photo:
Join Date: Oct 2003
Location: Newport News Virginia
Age: 57
Posts: 302
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Wow!
This thread is so old dust came out of my monitor! LOL!

I re-drilled the Edelbrock intake and it works just fine. After trying a few different carb combos I've settled on an Edelbrock 1407. The truck is a blast to drive and starts on demand.

Now it's time for bodywork.
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 04:56 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.