mechanical fuel injection - 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 11-18-2002, 06:17 PM
Member
 
Join Date: Nov 2002
Location: Cocoa, Florida
Posts: 47
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post mechanical fuel injection

does anybody out their have any knowledge about mechanical fuel injection. I have seen several old units for sale enderle and hilborn, but I don't quite understand how the fuel is injected into the correct cylinder at the proper time. I know that the fuel is delivered via the pump to a distribution block. What tells this distribution block what cylinder to inject?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-18-2002, 06:56 PM
Member
 
Join Date: Aug 2002
Location: Yuma,Az.
Age: 53
Posts: 64
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

The Hilborns are constant flow. Don't know anything about the Ederle. There is fuel flowing to all the nozzles at all times. I worked with some 15 years ago. I am sure they have changed some. Some have up nozzles.(located in manifold) and some have down nozzles(located in the heads. Some also have both.Go to a sprint car show and talk to them about more specifics. Thats what they use. Hope I have helped.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-18-2002, 07:00 PM
xtreme off-road's Avatar
Member
 
Last photo:
Join Date: Sep 2002
Location: North Bay, Ontario, Canada
Posts: 131
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I've heard about this system too, and if memory serves me right, it is the cylinder pressure during the compression stroke that opens the injector.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-18-2002, 07:54 PM
46_stvblt's Avatar
Member
 
Join Date: Aug 2002
Location: las vegas
Age: 77
Posts: 225
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I have run both Hilborn and Crower inj which are both similar to Enderle and hvyequp is right, they are constant flow. the cylinder that needs the fuel takes it from the manifold. the way that you keep from flooding the engine is by way of a by pass jet that sends fuel back to the tank. beleive it or not, they can be tuned pretty good. almost streetable. Hope this sheds a little light on it for you.....GK
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-19-2002, 10:46 AM
SAE Member, ASE Master Cert.
 
Join Date: Aug 2002
Location: Twin Lake, MI
Age: 67
Posts: 332
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

The mechanical injectors do work quite well, even though it seems like they would flood the engine. The calibration of the system is done with a "pill", which is actually like a jet and it goes in the fuel return line to the tank. Just the opposite of a jet, a large pill makes the engine run lean and a small pill makes the engine run rich. Have used Hilborn injectors and they are very responsive when tuned correctly. The real pain is in getting the engine started. Since there is no accelerator pump circuit, fuel must be sprayed into the engine to get it started. This is why you may see crew members squirting gas into the injectors, while the driver cranks the starter. Ah, the good ol' days.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-19-2002, 01:29 PM
Member
 
Join Date: Nov 2002
Location: Cocoa, Florida
Posts: 47
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

thanks for the responses, it helps to clear up some of my questions.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 04-15-2010, 08:03 PM
Registered User
 
Join Date: Apr 2010
Location: MI
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
fuel pump requirement for hillborn

can the new high pressure electric fuel pumps replace the old crank driven ones when using a mech fuel injection unit such as a hillborn?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 04-15-2010, 11:24 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Vacaville, CA. 95687
Posts: 177
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
Highball

I have a set of Norden Injectors and used the set on a Wayne 12 Port Head on a 261 Chevy six. I supplied the fuel with dual Stewart Warner Electric Fuel Pumps and used an in line Fuel Pressure regulator. They always did the job but like it was mentioned starting could be a chore. I push started the car.
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:

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 10:37 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.