[Diy_efi] Audi EFI conversion?

[Bill Shaw]

> 
> Bill, that was quite a thread on the Ferrari chat re MegaSquirt, did anybody
> ever try it?  

I don't know of anyone that tried Megasuirt on a Ferrari.  They seem to be
at opposite ends of the spectrum,  cheap engine controller and expensive
exotic cars.  I've seen Motec and other top $ controllers on Ferraris but
not MS.  Doesn't mean it hasn't happened,  I just haven't seen it.

> Same problem of long CIS injector reach on the Audi, so you've
> given me something to look into, for sure.  Nice that the Audi manifolds are
> threaded for a brass insert into which the CIS injectors are pressed.

Yes,  same threaded inserts in my recently departed '81 928 and the k-jet
Ferrari V8s.

I don't know what the Audi intake looks like,  but I was looking at the 308
intake runners when I had them off a while ago,  thinking about upgrading
from k-jet so I could add some boost.  I haven't done a detailed analysis
yet,  but I was thinking that I might be able to fill the existing injector
hole and machine a flat and a bung down lower on the runner to accept a
newer GM style injector,  like on my Z28 LT1.

Bill

> 
> Ernie B.
> 
> 
> ----- Original Message -----
> From: "Bill Shaw" <b.shaw at comcast.net>
> 
> 
>> Hey Ernie,
>> 
>> The CIS injectors are quite different from the efi injectors.  There is a
>> company that makes an adaptor to convert CIS to EFI bitzracing.com,  but
>> the
>> efficacy depends on the design of the CIS system.  It is basically a bung
>> to
>> replace your CIS bung that is machined to take the efi injector.  Unscrew
>> the CIS injector retainer,  screw in the adapter,  install the new
>> injectors, and build up the rest of the fuel system.
>> 
>> http://www.bitzracing.com/products/injector_bungs/injectorbungsdetails.html
>> 
>> It looks like it would work well on my Porsche 928 (I've owned both CIS &
>> EFI 928s) but might not work so well on my Ferrari,  reference the
>> following
>> thread on FerrariChat:
>> 
>> http://www.ferrarichat.com/forum/showthread.php?t=76848
>> 
>> Once the fuel side is settled,  you need to work out the sparky side of
>> things.  Megasquirt is one possibility,  but only controls the fuel.
>> Junkyard EFI is another.  I've had pretty good luck with the '749
>> controlling both spark & fuel,  others have done well with different GM
>> ECMs.  If you're EFI'ing the turbo Audi the 749 is worth a close look.
>> 
>> Bill
>> '84 928s 5 sp. Vortech/749
>> http://p-928.home.comcast.net/749.html
>> 
>>> From: "Ernest Buckler" <ebuckler at icehouse.net>
>>> 
>>> Ernie here, long time lurker, owner of EFI motorcycles and a couple of
>>> Audis
>>> ('86 5000, and '89 200 Turbo 2wd) that I'm thinking really need EFI to
>>> replace the messy K-Jetronic constant-flow stuff.  I have a small machine
>>> &
>>> welding shop, thus can make brackets, drill  & tap ports and holes, etc.
>>> I'd really like to be able to build a fuel map on a PC, datalog, etc.,
>>> even
>>> tho I know v. little about the process - but figure I've gotta start
>>> somewhere, eh?
>>> 
>>> Without a Search Engine for group archives, I'm lost; can anyone direct
>>> me
>>> to info on converting an Audi CIS system to EFI, if anyone has done this?
>>> The inspiration for this hypothetical project derives from noticing that
>>> the
>>> O-ring kit for Audi CIS injectors also was spec'd for a whole long list
>>> of
>>> true EFI vehicles as well - meaning that one of these EFI injectors (to
>>> be
>>> selected) should plug right in to the Audi ports...?   I'd need to make a
>>> fuel rail,  adapt a TPI and some sort of air flow measurement hardware,
>>> plus
>>> adapt the Audi temp sensors to the new ECU, also to be selected per
>>> suggestions.
>>> 
>>> Thanks in advance,
>>> Ernie B.