Question about injectors on EFI'd 10 valve cars

[Dan Dwyer]

Thanks, Gerard and Marc for the quick replies:

My motivation for asking about interchangeability was to see if I could use
cheap used injectors from some other car, sourced on E-bay or similar.  I
recently started researching EFI and became aware of http://www.diy-efi.org/
.  They feature an open-source EFI management system called Megasquirt:
http://www.bgsoflex.com/megasquirt.html .  In any case, a Megasquirt group
buy is supposed to be coming up and I was thinking about joining.  I don't
know what hurdles I would run into implementing this but it seems well
documented and for $120.00, pretty inexpensive.

Newtsplace
http://www.newtsplace.com/90tq/fuelparts.html?select=fuel.html&subselect=fue
lparts.html says that digifant equiped VW Golf/Jetta digifant injector
inserts (P/N#037 133 555) will work to replace the CIS inserts.  Javad
http://80tq.com/fuel.html says that the 20v inserts work but I don't know
the part number (maybe the same).

It sounds like the Ford injectors work well for the fitment into the
injector inserts on the manifold side.  Do these injectors use the D-Jet or
L-Jet harness connectors?  What kind of O-Ring do they have on the rail
side?? (small or 14mm)  I am assuming that nobody is using barbed top
injectors for 034 or other custom application efi?

What are you guys using as differential pressure between your manifold
pressure and fuel rail pressure?  I am assuming that 43.5psi for the rail is
standard based on what little I have read.  This site led me to believe that
35lb/hr (370cc/min) injectors would be appropriate for a maximum output of
250 hp:  http://www.rceng.com/technical.htm   Does this figure seem
reasonable? How high can I go and expect a decent idle?  What flow rate is a
stock 20v injector??

Sorry I sound like a little kid.  "Why's the sky blue. Why this ..Why
that...Why."  In any case I appreciate all of the info from everybody.

Dan


----- Original Message -----
From: "gerard" <gerard at poboxes.com>
To: "Dan Dwyer" <dandwyer at hotmail.com>
Sent: Saturday, April 06, 2002 2:43 PM
Subject: Re: Question about injectors on EFI'd 10 valve cars


> Hi!
>
> I'm doing the same thing.
>
> You can use Ford injectors, they're made by Bosch. You basically want
> Bosch style injectors. I've only seen the stuff for Hondas and other
> Japanese cars online and the all look very short. From what I know the
> tube on the injectors needs to be about 14mm in diamater. I have order
> some Lucas injectors locally, but I've discovered they're actually made
> for Lucas by Bosch.
>
> It's quite tough to find big Ford injectors online. Well, you can buy
> them from the likes of Summit Racing, but they'll probably be aroud $240
> for 8 units. I watched eBay and found Ford coupe turbo injectors that
> flow 35 lbs/hr and you can probably find them at a decent price.
> Unfortunately, that Ford was a 4-cylinder so you'll most often see them
> in sets of 4.
>
> About 350cc/min to 400cc/min should be good for 200HP as far as I
> recall. I had the equation somewhere. I've opted for larger 550cc/min
> injectors which are well within the range of the required fueling for
> 230+ HP.
>
> If you check eBay for fuel injectors you'll be able to see the
> difference between the design of Japanese units and the Bosch units used
> in the Fords.
>
> I also went through this process and got told about $60-$100 is good for
> a complete set of used injectors. I just paid about $195 for my set of
> brand new Lucas units (52 lbs/hr!!).
>
> What kind of power you thinking of extracting?
>
> Also, the injectors seats you need to order have part number 037 133 155
> and should cost less than $2 a piece from your Audi dealer. If you want
> I can do a check to see if these are the very same units used in the
> 20-valve motor you speak of.
>
> G.
>