Upgrading to EFI

[sjfd04]

Well, finally decided to step up and change over to an EFI system.  With a lot of research, I made the choice to go with the Holley Sniper EFI.  I have also decided to go with a new EFI fuel tank, my tank is original and probably a good idea to replace it.  The new tank will have the pump in it and make the install easier and cleaner.  I ordered a custom 3/8 inch fuel line from The Right Stuff to replace the original 5/16 inch.  I will need to run a return line and have not figured that out yet.

I will take photos as I go and pass along any info that might be of help if anyone else decides to install the same system. 

Before I started to remove any parts, I installed a set of new Holley analog gauges in the empty space above the radio.  These gauges will interface with the Holley ECU.   The ECU will also control the electric fan on/off temps. 

[GS66]

I will be following along with great interest!

[sjfd04]

This guy has a system on his Riv, I think:

https://www.facebook.com/photo.php?fbid=2013547612217437&set=g.6864028574&type=1&theater&ifg=1

[GreatScat1965]

Well, finally decided to step up and change over to an EFI system.  With a lot of research, I made the choice to go with the Holley Sniper EFI.  I have also decided to go with a new EFI fuel tank, my tank is original and probably a good idea to replace it.  The new tank will have the pump in it and make the install easier and cleaner.  I ordered a custom 3/8 inch fuel line from The Right Stuff to replace the original 5/16 inch.  I will need to run a return line and have not figured that out yet.

I will take photos as I go and pass along any info that might be of help if anyone else decides to install the same system. 

Before I started to remove any parts, I installed a set of new Holley analog gauges in the empty space above the radio.  These gauges will interface with the Holley ECU.   The ECU will also control the electric fan on/off temps.

Can you leave the factory 5/16" feed line and run the new 3/8" line along side of it? The original fuel line should make a good return line. 

Jerry

[sjfd04]

Yes, that was the plan.  Reading instructions and they want you to use a 3/8 inch return.   I plan to call them and ask.  Thanks for the heads up.

[Rollaround]

What fuel pressure does the EFI require?

[sjfd04]

I'm thinking I saw 58 psi somewhere in the instructions.  I will double check.

[Rollaround]

Here's what I used on my LS conversion.  It's a filter and pressure regulator combo (58 psi) used on Corvettes. It mounts by the tank and returns excess fuel directly to the tank.  Not sure it it will work in your application but it eliminated the requirement for a return line for me. 
I'll for sure be following your install, I'd like to use the system on a BBC.


 https://www.speedwaymotors.com/Speedway-GM-LS-V8-Fuel-Filter-Fuel-Regulator-Kit-58-PSI,41791.html

[bobbybuick]

you can tune it to a much lower than 58psi fuel pressure im sure..i run static 38 psi on my t type

[elagache]

Dear Tom, Jim, Jerry, Kevin, Bobby, and mid-60s Buick owners with a taste for high-tech,

Well, finally decided to step up and change over to an EFI system. 
. . . .

Good for you! (and your car!) 

Before I started to remove any parts, I installed a set of new Holley analog gauges in the empty space above the radio.   

Nice job with setting up the gauges in that spot!  If you don't want air conditioning (or go with an under-dash unit) that a great use of that space!

I'm thinking I saw 58 psi somewhere in the instructions.  I will double check.

As the rest of the guys have said, it is most likely lower.  I believe that FAST and Holley are using the same ECU and other components.

Thanks for taking the time to document your conversion for us!

Cheers, Edouard 

[sjfd04]

A must when and if anyone decides to go with the EFI system, go with the heat shield type base gasket.  Look at mine when I pulled it off, in time, you will destroy the EFI base.

[sjfd04]

Today I started the install, located and drilled for the O2 sensor. Fabricated some clips and secured electrical leads to the top of bell housing and transmission.  I decided to locate sensor on the passenger side exhaust pipe, it was easier than working around the clutch linkage.  Not sure what needs to be done with the heat riser valve, if anything.  Throttle body is in place with heat shield, linkage was pretty easy.  Supplied fittings worked perfect, just needed to adjust the linkage arm.   Working out location for the relays and needed wiring. 

Spent the rest of the day installing gauges in the dash.  This required that the dash pad, glove box and dash bezel be removed.  Easy but time consuming.

[Brian]

You can run a 1/8" pipe tap down into the two holes in the top of the intake, then put pipe plugs in them to stop the exhaust flow to the base of the carb.  The exhaust will still heat up the intake, but no so much the carb base (or in your instance the EFI base). 

[sjfd04]

Thanks Brian, I will do that.

[Brian]

It will work the best if you can find some 1/8" pipe plugs with the recessed allen head in them.  The ones with a square on them are hard to install since the head will be down in the hole below the surface.