Fuel Injected 500

[spyderman]

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

[Chrome]

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

[davesdeville]

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.

[The Ape Man]

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.

[davesdeville]

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.

[drmenard]

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.

[Chrome]

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

[davesdeville]

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...)

[Chrome]

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...

[terrible one]

I'm doing Megasquirt. It looks intimidating.

[Chrome]

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...

[terrible one]

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

[davesdeville]

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

[terrible one]

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.

[Chrome]

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.