<VV> Re: Information about Mega Squirt on a Vair?

[jwcorvair at aol.com]

Thanks for the information Marty. That's exactly the type of information that I was looking for. Also, thanks to everyone that replied. There is a lot of good information out there. I'm especially intrigued by the ideal of the Yamaha throttle bodies.
 
Some have asked that I post more information about the engine, so here goes. The engine conists of a 1966 case with 1964 pistions/cylinders and 1964 turbo heads. The current carb is a Rochester four barrel on a two runner intake manifold. Sorry, I don't know the jets as I did not set up the carb. Ignition is stock, but I have not put a timing light on it to see what the timing is set at. I need to get the car ready for winter, which means fresh oil and plugs as well as checking the timing. The car runs pretty well with very little tip-in (but it is there), okay mileage on the highway (about 20) and lousy mileage in town (about 14).
 
My goal is better driveability, improved ecconomy, while maintaining a reasonable level of performance. I think that I can accomplish this with an FI system. I could probably do this with any combination of carbs, but I am intrigued by the idea of installing an FI system.
 
Regards,
 
Joe White
 
-----Original Message-----
From: vairparts <martyscarr at gmail.com>
To: fastvair at yahoogroups.com
Sent: Wed, 28 Sep 2005 21:13:37 -0000
Subject: [fastvair] Re: Information about Mega Squirt on a Vair?


JW-

I used two Holley throttle bodies on my Megasquirt installation.  
These TBs are aftermarket replacements for the GM 4 cylinder engines 
that have a single TB.  They use the typical GM TBI low pressure fuel 
delivery of approximately 13 PSI.   The TBs were adapted to some dune 
buggy type manifolds that I got from a friend.  

The fuel pump I used was an external pump from a TBI Subaru.  It's a 
small pump that fit behind the sheet metal close to the fuel tank.  

I added a 3/8" fuel delivery line, and used the existing 5/16 line 
for a return line.  I modified the fuel gauge sending unit for the 
additional line, added a tank sock to fit the 3/8 line, and put a TBI 
type fuel filter in the engine compartment. 

The base VE table for Megasquirt will start and run the car.  You can 
create a new VE table if you have some HP and torque numbers by using 
the built in VE table generator found in Megatune.  If you have a 
wideband O2 sensor, the VexMe software at 

http://www.jaypsc.co.uk/vexme/   should help (haven't tried it yet).

Read the tuning portion of the MegaManual several times, and get a 
friend to drive the car while you work the laptop.  Megasquirt has 
built in data logging, and using MSTweek300 and a wideband sensor you 
should be tuned in no time.  Be sure to save your configurations and 
it helps to keep a log of changes you've made.  

The whole Megasquirt project has been a lot of fun, and the support 
forum over at http://www.msefi.com is great.

regards
Marty Scarr

--- In fastvair at yahoogroups.com, jwcorvair at a... wrote:
> Hi,
>  
> I am considering installing a Mega Squirt fuel injection system on 
my Porvair. I have looked at their web site and the system seems to 
be pretty straight forward in the installation and setup. However, 
before I commit to this project, I'd like to find out how others in 
VV/Fastvairs might have set up their engines. I have questions such 
as:
>  
> What throttle body did you use?
> What fuel pump?
> Did you replace all your fuel lines?
> What did you do for the injection mapping? (Basic starting point)
>  
> The Mega Squirt system is essentially the control unit and it is up 
to the builder to assemble the mechanical pieces. As such, a builder 
has an extensive range of components, either new or from salvage 
cars, that might be used. So, if you have some experience you would 
like to share, please let me know.
>  
> Thanks,
>  
> Joe White (62 Sedan, 66 Porvair)
> Boulder, CO
> CORSA, RMC
> 
> 
> [Non-text portions of this message have been removed]




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