DIY_EFI Digest         Tuesday, April 6 1999         Volume 04 : Number 213



In this issue:

	Re: Toyota Supra twin turbo and water injection.
	Re: EFI Head Volume

See the end of the digest for information on subscribing to the 
DIY_EFI or DIY_EFI-Digest mailing lists.

----------------------------------------------------------------------

Date: Mon, 5 Apr 1999 22:15:26 -0600
From: bearbvd@xxx.net (Greg Hermann)
Subject: Re: Toyota Supra twin turbo and water injection.

>How about a ZR1 Vette ECU driving 8 EFI boards - at least you can have 16
>pairs...
>Tom

Well--I had had dreams of networking three '332 boards---isn't it 16 timed
outputs per 332 processor? (And I think I have found some twin plug heads!)

Actually--one of the injectors is for the compressed "booster" air, one is
for water, and two are staged and for fuel. The air is a pretty simple
algorythm--a 60 (or so) degree squirt every 720 degrees, no change. The
water injector program would be pretty much like a standard, single fuel
injector program--follow engine air mass flow pretty closely. The other two
would be pretty much a parallel of what two staged fuel injectors do, like
on a ZR-1.

Too much coffee, and too much time on Nutscape here--it wuz contageous----
<grin?>

Greg
>
>Greg Hermann wrote:
>
>> >Use any sequential ECU and drive 8 EFI332 driver boards.   EEC_IV from a
>> >Mustang or GM's equivalent. You could add an rpm switch to the third
>>and fourth
>> >so it would idle on two.
>> >
>> >I suppose you want to program all 32 injectors.....
>>
>> But of course--how could it be otherwise, Tom??
>>
>> Greg
>> >
>> >just food for thought.  Sharpe

------------------------------

Date: Mon, 5 Apr 1999 22:24:14 -0600
From: bearbvd@xxx.net (Greg Hermann)
Subject: Re: EFI Head Volume

>I thought the aluminum vette heads and the early powerpack heads were
>the only ones with chambers that small.
>Any others?
>Shannen
>
>Mark Romans wrote:
>>
>> The stock cast iron head is 58.5?  Whoa, I thought it would have a bigger
>> chamber than that.  Thanks for the info.
>>
>> Also quench area is critical in preventing pre-ignition

Make that "DETONATION"!! Different animals.--Yeah, I'm being picky tonight!

Greg

 so he would rather
>> increase the combustion chamber volume than shim the head up.  Thanks again.
>> Mark

------------------------------

End of DIY_EFI Digest V4 #213
*****************************

To subscribe to DIY_EFI-Digest, send the command:

    subscribe diy_efi-digest

in the body of a message to "Majordomo@xxx.  

A non-digest (direct mail) version of this list is also available; to
subscribe to that instead, replace "diy_efi-digest" in the command
 above with "diy_efi".