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Comment by Michael Forte on October 30, 2017 at 10:13pm
Thanks for sharing this Eric! I see that the water temp sensor is screwed into the hole where the factory temp gauge sensor goes. Did you put that sensor somewhere else or just forego the temp gauge? I’m looking into getting one of these efi systems and started planning and assumed I’d have to drill a hole in the opposite head or put a tee in the crossover tube. Looking for ideas. Thanks,
Comment by Eric stolte on November 1, 2017 at 10:36pm
Michael the efi computer plugs into the the sensor and the handheld computer screen gives you the engine data you need such as temp, rpm,volt etc, so your dash gauge won’t work.
Comment by Clovis on November 1, 2017 at 10:53pm
Micheal are you a hands on guy when it comes to your car? Have you ever done major work such as this? I ask these questions because this is not a simple installation. Tuning it is also not so simple either. If you've done this before jump right in with both feet as it's very rewarding.
Your questions about the temperature sending unit tells me this may be a bigger project, automotive wise, than you've ever tackled before. I highly suggest you find a reputable shop that has done at least two of these installs before. I eat sleep and live for this kind of stuff all my life so I didn't even bat an eye when it came time to do it. Since everything was apart I also detailed the engine compartment and totally went through the comfort control system. I also rewired and added electric fans. This was done simultaneously with the efi install.
If you are thinking about doing it still read my posts, there are several, on the efi and comfort control installs. Happy building sir.
Comment by Michael Forte on November 1, 2017 at 11:20pm

Thanks Eric.  I want my factory gauge to work so I'll have to find another place for that sensor.

Clovis, I asked the question because I had been looking around my engine for a spare plugged off factory hole and wondered if Eric found one.  Looks like Cadillac only gave us one tapped coolant passage and used it for the dash gauge.  After I convert and the car is tuned, I'll be unplugging the handheld computer and using the factory gauge, so I'll need to make another hole.  I'll probably either tee off the hose fitting on the back of the crossover tube or drill and tap a new hole on the opposite cylinder head.

Anyway, yeah, this isn't my first.  I do all my own work except bodywork and upholstery.  I've converted several cars to EFI but this is my first Cadillac.  I'll have mine completely apart as well for a complete under-hood restoration.  No worries, just planning my attack!  LOL.

I'll check out your posts, thanks!

Comment by Clovis on November 2, 2017 at 1:19am
I don't think it's the best idea to drill into a head and tap it. If you look in my thread about emissions you can see the inline rad hose adapter I use for the thermally ativates vacuum switch. It came with a 1/4" hole but I drilled and tapped it for 3/8" pipe. Just a few buck on Amazon.
Comment by Paul Gostick on February 20, 2018 at 4:24am

Hi Eric I’m restoring a 63 Fleetwood Sixty Special in New Zealand running a rebuilt 390

My mechanic said I should look at fitting the Holley Sniper EFI system but your one looks good and by the reviews seems to perform well too and cheaper than the Holley.Is that the standard Cadillac manifold and can you give me tips on what linkages I need and what’s the canister model?

appreciate the advice not many 63 Caddy experts in New Zealand!

cheers Paul

Comment by Clovis on February 20, 2018 at 2:14pm

Paul read my thread on my fitech installation. You can also go the their website to see whats available. 

Comment by Anders on February 20, 2018 at 5:56pm
Comment by Eric stolte on February 24, 2018 at 10:46am

Paul I have the Holley EFI on my Pontiac,  it’s not the sniper  it’s the full system and I like the FI TECH better


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