383 EFI or 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 11-21-2009, 07:48 AM
Registered User
 
Join Date: Jul 2009
Location: Veneta,OR
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
383 EFI or Carb?

I have been thinking about this for a long time. I have a couple of different set ups. Engine specs are :

383 2 Bolt
9.5 Compression
Patriot 190 cc Aluminum Heads, 62cc
218/224 @.050 .495/.502 lift 112 lsa, 110 ICL
Edelbrock 3594 fuel pump
Shorty Headers with 2.5" Y into single 3" flowmaster no cat

This is a 1 ton 4 by 4 truck. It came factory with TBI injection. the last set up had holley tbi with fuel pressure turned up alittle. I ran lean. this is waht i have for induction:

1. Edelbrock rpm intake with holley 2" thottle body
TBI chips chip
65 LB Injectors

2. Edelbrock 3501 mpfi for tbi system ( got a great deal on ebay its brand new)
29lb injectors
holley 502-6 as air valve ( no injectors)


To make the 3501 kit work proper, I am going to have to buy a different computer to run in port firing. Learn how to tune it, etc. I wanted to keep it fuel injected because everybody i talked to said it wouldnt run right. Now I just want to get it on the road. I like the idea of fuel injection, i am not sure i like the idea of tuning it. So to the question, which system should i go with? Will a carb out perform efi? What would u do? Money is not behind my thinking. Just want some input on what the other hotrodders think. Thanks in advance.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-21-2009, 08:34 AM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 59 Times in 56 Posts
There is no carb that comes close to injection, hands down. However if you don`t want the hassle of tuning it and just want to get it on the road then by all means stick a carb on it, tune it, and be on your way. You answered your own question on that one.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-21-2009, 08:43 AM
Registered User
 
Join Date: Jul 2009
Location: Veneta,OR
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for the reply.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-25-2009, 11:51 AM
Registered User
 
Join Date: Jul 2009
Location: Veneta,OR
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
So I decided to go with the multi port. I went to put on the intake this mourning, and the middle bolt holes are off. I think the patriot heads are drilled like the old sbc heads. Can I widen these hole out? Thanks for the replys.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-25-2009, 12:27 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,085
Wiki Edits: 0

Thanks: 17
Thanked 333 Times in 313 Posts
Quote:
Originally Posted by DoubleVision
For milage and responsiveness There is no carb that comes close to injection, hands down.

Carbs still make more power- varrying from only a little to a significant amount.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-25-2009, 07:02 PM
Registered User
 
Last wiki edit: Hand cleaner Last photo:
Join Date: Jun 2008
Location: Houston
Posts: 170
Wiki Edits: 3

Thanks: 0
Thanked 2 Times in 2 Posts
you should be able to slot the holes and use washers under the bolts with some silicone.

you may want to look into the EBL for the ECM.
http://www.dynamicefi.com/


Quote:
Originally Posted by ap72
Carbs still make more power- varrying from only a little to a significant amount.
i hear a lot of people say that, but the fastest cars are fuel injected

Last edited by Soul_Hunter; 11-25-2009 at 07:44 PM.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-25-2009, 11:00 PM
zildjian4life218's Avatar
Listen and Learn
 
Last wiki edit: DIY junkyard electrical fan controller
Last journal entry: SBC 305 Twin Turbo
Last photo:
Join Date: Dec 2008
Location: WNY/Rochester, New York
Age: 25
Posts: 1,648
Wiki Edits: 7

Thanks: 44
Thanked 9 Times in 9 Posts
I wonder why top fuel run fuel injection if carbs make more power? If you want a bolt on and go carb is the way but if your after the quality of cold starts, idle, tuneabilty, flexibility, economy, and performance i would go fuel injection. I love going to the track and seeing people sitting in their car changing the timing and pulse width by just sitting there using a laptop and not spilling fuel by changing the jets. There is no way a regular dist with vacuum and mechanical advance and a carb can account for all the different operating conditions of an engine. just my .02 but i have lots to learn still
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-26-2009, 11:42 AM
Registered User
 
Join Date: Jul 2009
Location: Veneta,OR
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the replys. Yeah I think i keep it injected. I am still working on the maniflod, try to mak it fir those patriot heads. Those top fuel race cars would have to be injected because of the boost. Just a thought, thanks again.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 11-26-2009, 12:12 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,840
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Quote:
Originally Posted by ap72
Carbs still make more power- varrying from only a little to a significant amount.
Not in all cases, you cannot make a blanket statement like that. Just like anything the EFI system can be sized to take maximum advantage of all a particular engine is capable of and do it over a very wide RPM range to boot.

Vince
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 04-10-2010, 07:17 AM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Massachusetts
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have a Holley Multi-Point Fuel Injection system for sale with a 950 commander computer.

http://www.hotrodders.com/ads/showproduct.php?product=7308

Thanks,
Rob
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 04-10-2010, 04:02 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 59 Times in 56 Posts
Even so this is a bit of a older post, it don`t bother me any what AP says if he`s right or wrong, he seems to like letting me know if he thinks I`m wrong about something and it`s cool, even so i`m not in competition here.
AP`s a good kid and he`ll get wiser as he ages, I have hope for`em lol.
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
Converthing EFI to carb (s-10) help... ForceFed86 Hotrodding Basics 5 10-13-2009 12:31 AM
1988 ford efi to carb swap specifics? kunstler Engine 8 03-24-2007 09:28 AM
CARB. VS. EFI khaotic89GT Engine 5 05-19-2003 04:39 AM
S-10 wiring 2.8 EFI to 350 carb S_10_HELP Electrical 2 02-23-2003 07:12 AM


All times are GMT -6. The time now is 06:42 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.