Fuel Injected 500
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 7 1 2 3 4 5 6 7 LastLast
Results 1 to 15 of 99
500, 472, 425, 368 Discussion, Fuel Injected 500 in Cadillac Engine Technical Discussion; I recently bought a '75 Caddy 500 and I am looking for a good way to put an updated FI ...
  1. #1
    spyderman's Avatar
    spyderman is offline Cadillac Owners Member
    Join Date
    Sep 2005
    Location
    Minnesota
    Age
    41
    Posts
    17

    Exclamation Fuel Injected 500

    I recently bought a '75 Caddy 500 and I am looking for a good way to put an updated FI system on it. Is there a good company that does it or if a company makes an updaed manifold to fit new injectors....Please Help


    Thank you in Advance


    Check out My Project:
    http://www.1953buick.com

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Chrome's Avatar
    Chrome is offline Cadillac Owners Member
    Join Date
    Aug 2005
    Location
    Kansas City, ks area
    Age
    50
    Posts
    37

    Re: Fuel Injected 500

    Well, if you're technically inclined, join this group: http://autos.groups.yahoo.com/group/megasquirt/
    It's a totally homebuilt FI system. You can buy a PC board and parts kit from them if you want, or not. All the information to build the system is there and free.
    If you really want to push your technical skills, you can go here:
    http://autos.groups.yahoo.com/group/megaspark/
    Electronically controlled ignition...
    I used to belong to these groups, and probably will join them again, as I want to build a multi port FI for the 368 Hearse I'm buying.

    The megasquirt is versatile enough that there is even one guy (IRC) that has on on a motorcycle... So there is a project I could use too...

    Good Luck

  4. #3
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    26
    Posts
    7,971

    Re: Fuel Injected 500

    If you know how to do the rest of the system, great. The options for manifolds would be:

    -Stock manifold drilled for injector bungs (cheapest but a PITA to drill properly I'd imagine)
    -Stock FI manifold, 1976 only and IIRC maybe 1% of cars had that option so it's RARE.
    -Bulldog cast aluminum single plane manifold, which has places to drill for injector bungs easily.
    -Boogieman from Potter, which is a good manifold but not sure if it will clear a stock hood if that's what you're working with.

    Wouldn't bother with the Edelbrock 2115 especially since you're doing FI.

  5. #4
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
    Location
    Southern NJ
    Age
    51
    Posts
    2,096

    Re: Fuel Injected 500

    Options for manifolds also include 425 F.I. manifolds which are the same except for some EGR differences and will work on the 500. They are not too difficult to find if you know where to look and are not in a hurry. Someone made an adaptor to use a Fode 460 manifold on the 500. IIRC they made a port injected 460 for trucks. Maybe there's one waiting in the truck boneyard near you.

  6. #5
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    26
    Posts
    7,971

    Re: Fuel Injected 500

    I knew I was forgetting something. The adapter plates for the 460 work, in fact a friend of mine is designing a cross ram FI manifold for the BBF in one of his mech. engineering classes that I could run on a 500 with those plates.

    I forgot about the 425 FI manifolds but they're pretty dang rare too.

  7. #6
    drmenard is offline Cadillac Owners Enthusiast
    Automobile(s): 95 fleetwood 81 deville
    Join Date
    May 2003
    Location
    Massachusetts
    Posts
    953

    Re: Fuel Injected 500

    The stock F/I intakes are rare.. But Al at MTS had some on ebay and did not sell them.. So if you give him a call I'm sure he's got some with throttle body.
    There are many aftermarket computers that will run your car just fine.. from a built it yourself for a few hundred... to $1000 to $3000 ready to go systems.

  8. #7
    Chrome's Avatar
    Chrome is offline Cadillac Owners Member
    Join Date
    Aug 2005
    Location
    Kansas City, ks area
    Age
    50
    Posts
    37

    Re: Fuel Injected 500

    Or you could just buy the Holley 4bbl throttle body kit... It's under $1000

    http://www.holley.com/data/Catalogs/Holley(137-182).pdf

  9. #8
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    26
    Posts
    7,971

    Re: Fuel Injected 500

    But why even bother with TBI when a well tuned quadrajet will do just about the same thing for 1/3 the cost? If you want FI, MPFI is the only way to go. (Well, unless you can do sequential MPFI...)

  10. #9
    Chrome's Avatar
    Chrome is offline Cadillac Owners Member
    Join Date
    Aug 2005
    Location
    Kansas City, ks area
    Age
    50
    Posts
    37

    Re: Fuel Injected 500

    That's true, but it is a fi option...
    Personally I'd rather do the Megasquirt with the manifold of my choice, but with mine I'll probably stay with the stock quadrajet and do some tinkring... Gotta love tinkering with carbs...

  11. #10
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    23
    Posts
    1,631

    Re: Fuel Injected 500

    I'm doing Megasquirt. It looks intimidating.

  12. #11
    Chrome's Avatar
    Chrome is offline Cadillac Owners Member
    Join Date
    Aug 2005
    Location
    Kansas City, ks area
    Age
    50
    Posts
    37

    Re: Fuel Injected 500

    Yeah, but where else can you have a laptop sitting on the seat beside you as you adjust your fuel curve, injector timing, and everything else associated with it...
    Then kick in the megaspark and adjust everything having to do with spark...

    Yeah, it does look intimidating tho, prolly why I haven't started on it yet...

  13. #12
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    23
    Posts
    1,631

    Re: Fuel Injected 500

    Yeah Chrome, tell me about it. I am so looking forward to that.

  14. #13
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
    Join Date
    Aug 2003
    Location
    Albuquerque, NM
    Age
    26
    Posts
    7,971

    Re: Fuel Injected 500

    Nah, what's intimidating is trying to get a megasquirt control the injection of liquid propane. (exactly why I'm going for carbureted instead...)

  15. #14
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    23
    Posts
    1,631

    Re: Fuel Injected 500

    Haha dave until I got to the end of the post I thought you were going for LPG injection...the carb is always good, but I'm ready for something new. Aside from having no flat spots, etc like a carb and better fuel economy, I think I will have a serial cable coming into the cabin permanitly, and then just buy an old laptop, re-format it and put nothing but the Megasquirt software on there, and make that it's dedicated job.

  16. #15
    Chrome's Avatar
    Chrome is offline Cadillac Owners Member
    Join Date
    Aug 2005
    Location
    Kansas City, ks area
    Age
    50
    Posts
    37

    Re: Fuel Injected 500

    I have an old 486/33 laptop that I figured would be perfect for this application. You should be able to find something old on eBay cheap... The battery is junk, but I leave it plugged in all the time anyway.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

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.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting