[Diy_efi] efi conversion

[Gene Holtzclaw]

Paul, thank you for responding. I am not sure of the part number on the 
injectors as I went to a parts store, looked through the injectors that 
potentially would fit, and then backed into the parts book to see what they 
came on. They were the GM 3.1 litre, the GM 4.3 liter, and the Ford 5.0 
litre. The way the Lucas throttle bodies are made would make it extremely 
easy to make a small bracket to hold two injectors in side by side. The 
three seperate throttle bodies are plumbed as to interconnect for vacume 
reading across an average of all three. I would like to mount the mechanical 
injection distributor but gut it and in essence use it as a fuel rail with 
the fuel lines feeding each injector as to keep somewhat of the original 
appearance. I've looked at the megasquirt controllers but they appear very 
much for the techies. I'm not putting it down, its just that i've done 
several ground up restos and a couple of engine transplants and feel as 
though I can do most anything within reason and am not scared to scrounge 
salvage yards for acceptable stuff. My question is in injector sizing 
because it seems that fuel pressure and timing would be more a factor in 
conversion than size of injector. Or am I over simpifing it? Anyway, as far 
as controllers are concerned, it looks like a GM of a mid 90's v-6 will work 
and put the leads on the injectors as needed to correspond to firing order. 
comments?






From: Tlsalt at aol.com
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>To: diy_efi at diy-efi.org
>Subject: [Diy_efi] efi conversion
>Date: Sun, 16 Mar 2003 09:42:03 EST
>
>Gene Holtzclaw wrote,
>
>I have just joined this list to gather info on converting to EFI. I have a
>2.5 litre Triumph(TR6). I also have a Lucas PI unit. Other than having
>mutiple butterflies as a negative, what would be advice as to where to 
>start
>in gathering needed parts to convert to EFI? I have found that the GM 4.3
>litre injectors will fit the Lucas bodies with very little modification. I
>would like to convert with the hope of adding a turbo after getting my
>conversion worked out. My goal is to keep the under hood look as original 
>as
>possibe.
>
>Hello Gene,
>
>You first need to decide what ECU to use for your conversion.  I would use 
>a
>MAP based system with that manifold on a road car.  You will probably have 
>to
>build a small plenum and hook it up to each runner after the throttle 
>plates
>to get a stable signal for the MAP. Most aftermarket ECU's can use GM 
>sensors
>and you'll need a coolant temperature sensor, air temperature sensor, TPS 
>and
>MAP.  The small Ford TPS can be adapted to many throttle shafts, it fits
>right on a Jaguar TB. There are two different models with different 
>rotation
>directions. What size are those injectors (are they 0280150221)? I have a
>list, if they have numbers on them. The injectors should be sized to the HP
>of the engine, which will change if you are considering a turbo.  That 
>engine
>is around 150HP, so you will need around 15 lb/hr NA and maybe 24-26lb/hr
>with a turbo. You will also need to change MAP sensors when going to a 
>turbo.
>Most of the common EFI injectors have similar sized orings. Is there an
>insulator in your manifold or are you planning on running the injectors
>directly in the metal? You will need to make up a fuel rail to hold down 
>the
>injectors. On a straight six it is best to feed the rail from both ends and
>take the pressure regulator feed from the middle. You can also go with hose
>barb injectors and connect to the rail with fuel hose.
>
>Paul
>
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