emulator question

[Bruce Plecan]

-----Original Message-----
From: Jake Sternberg <chickens at ccwf.cc.utexas.edu>
To: diy_efi at esl.eng.ohio-state.edu <diy_efi at esl.eng.ohio-state.edu>
Date: Monday, October 12, 1998 9:53 PM
Subject: Re: emulator question


Can't say I know anyone that has run without the steam holes.  Everyone
winds up R+Ring the heads to vent em.  With air trapped around the top
of the cylinder bores, the ring seal goes away.    {last occurance 60 days
ago}.
   If you want to fill the lower 2/3 of the cylinders with concrete fine,
but the
top but needs to get rid of heat.  Same with the coolant around the intake
valves, but the ex valve area has to be able to get rid of heat.  If ya can
get
rid if the localizedhot spots-that is truely neat.  It's the lack of hot
spots
that makes most of the difference in my book.  Yes there is a slight %
of effeci, to be gained, but jeez there are easier ways to get it.
   If your racing F1 go for it but on a street motor this is getting to be
a real project for maybe a slight increase.
   I'm as odd as they come for running at 190dF.  I also run a thermostat,
and a 1/2" spacer plate that is machined like a thernostat gasket.  Under
that I run a Moroso Restrictor disc.  I experiment with the disc opening
to keep the flow just high enough that temps don't get out of hand at
sustained WOT.  Usually 5/8" opening with 3  1/4" holes.
  I'm sure someone with say that won't/can't/ work or this idea of "mine" is
better. The above is what works for me.
  I'd worry more about finding a recirculating thermostat up to the flow of
what you need, and get a couple free ponies that way.
  If these are a production cylinder head (the AL), I'd worry about the
valve seats falling out from the thermal cycling at these high temps.
  AL walks around pretty good.
Cheers
Bruce
>
>Thanks, I hadn't thought of that (although i haven't even picked
>up the motor yet, so i haven't thought about a lot of things yet).
>I intend to install an oil cooler radiator from an RX-7 that's in
>my parts bin.  It's the biggest oil cooler i've ever seen, and it
>fits perfectly behind my air dam.  don't worry, i'll put a rock
>guard and bendable bracket on it.
>I've been told that it's safe to run an engine like this, even with
>aluminum heads (this motor has iron heads of course) up to 300 degrees
>if i'm using this high-temp coolant.  What do you think of that?
>> From: "Bruce Plecan" <nacelp at bright.net>
>> Date: Mon, 12 Oct 1998 11:07:06 -0400
>> Subject: Re: 300 degree COOLANT
>>
>> >>> has anyone heard of a special type of coolant which
>> >>> boils at 300 degrees F instead of 212-250 degrees?
>> >>
>> Don't forget ya raise the coolant temp that much your oil temps
>> are going to be way high also.
>> Bruce
>
>
>VPP is for programming, so you can ignore it.  Basically, the wire
>leading to ~OE on the 27256 goes to the ~OE/VPP line on the 2732.
>There is no VPP signal from the ECM (it's not a rom burner) so it's
>really just the ~OE signal.  mail me if you need more.
>
>-jake
>
>> eprom, What lines for the 32k do I leave out, and how do I set up for
>> the 2732??  I have looked at both pinouts and the 27256 has separate
>> lines for ~OE and VPP while the 2732 combines them?  Thanks for any help
>> you can be...
>>
>> - --
>> Jason Weir
>> 88 Wrangler - 258 Chevy TBI
>> Fayetteville, North Carolina
>> http://home.att.net/~jweir/tbi/inject.htm  --- TBI Installation Page
>> mailto:jweir at att.net
>
>