Sniper EFI

[Kodiak]

I have the Blueprint 427 with sniper efi and started the wiring and confused on how to wire up the blue fuel pump wire. Not sure what to cut and splice into. Thanks .

[wallace18]

You can run it directly to the pump + terminal or splice it to the tan wire that goes to the pump from the RF wire harness. I personally use it to trigger the RF fuel pump relay. That way the inertia switch and all stay working. RF = Ron Francis wire harness.

[RBachman]

Dittos!

You can run it directly to the pump + terminal or splice it to the tan wire that goes to the pump from the RF wire harness. I personally use it to trigger the RF fuel pump relay. That way the inertia switch and all stay working. RF = Ron Francis wire harness.

[Norm B]

I didn’t like the idea of a relay triggering a relay so I removed the Sniper one from the circuit. The Sniper has a small blue fuel pump trigger wire that makes a ground when required to run their relay. I wired that into the ground circuit of the existing fuel pump relay setup. A hidden switch was put in the trigger wire for maintenance and security purposes.

HTH
Norm

[Blitzboy54]

I ran the blue wire directly to the pump and then ran the ground through the inertia switch. 6 one way a half dozen the other.

The only difference is if you have a in tank fuel pump. I would have tied into the RF if I did since it's already connected and in the back of the car.

[Papa]

I pulled the tan fuel pump wire out of the plug where the rear harness connects to the main harness behind the dash and connected the Sniper wire there. You will need to do something different with the inertia switch if you want that to function as intended.

If you want to use the RF fuel pump relay without the concerns of triggering it from another relay, you can remove the relay that is part of the Sniper harness and take the (-) output from the ECU that goes into the Sniper relay and use that as a negative control by splicing it on the inertia switch (-) side of the RF relay.

[D Stand]

Here is an attached wiring diagram I created that might help. I removed RF relay, relocated inertia switch and ran sniper output right to my pump. I might add a separate hidden switch like other have for maintenance and/or extra security


151729

[Kodiak]

Thanks for all the help lots of options wiring the fuel pump.

[RJD]

Another thing to consider if you're planning to run additional electronics like a USB port, seat heaters, etc - if you use the Holley Sniper relay to control the fuel pump, it frees up the Ron Francis fuel pump circuit. You can remove the Ron Francis fuel pump relay and repurpose the Ron Francis fuel pump circuit at the fuse box to power something else. In my case it powers my USB ports, since the radio circuit powers my stereo and the heater circuit powers my seat heaters.

[MyBucketList]

Not sure if this is the right place to ask the question... as I am relatively new to the Forum and still waiting for my MK4 arrival (late October). However, saw this post on Sniper EFI and thought perhaps some might have advice in this general area.

Setting the picture... looking at BluePrint 306 and have recently been reading up on Holley Sniper EFI Kits. Looks like the full Sniper kit with in tank fuel pump is running around $1750 depending on the vendor. I see that the BP 306 also comes with the EFI option (that happens to be a Sniper)... but adds a $2K to the carbureted price (not sure if that includes the the in tank pump). So, that has me wondering whether to it is better to go with the carbureted motor and change out the carb for the EFI myself to save a little money... or just pony up and get the installed Sniper from BluePrint. After watching the Sniper videos, I am not afraid of the install. I do image that would screw with the warrantee (which is a significant advantage of the BP engine package). I guess an alternative would be to run the stock carb set up for the 3 years then change to whatever the latest and greatest EFI kit is at that point. Great idea of I was patient... but I want my cake and to eat it to... so to speak. Part of me also says that a modern Holley carb is still going to be a great performer and not give me many reasons to make me swear at it... so am I really going to regret not getting the EFI. ???

That being said... are there any experienced Sniper adders/users that could lend a machete to my intellectual thicket? Perhaps even someone who has gone down the same path and cares to share their experience?

[nucjd19]

Not sure if this is the right place to ask the question... as I am relatively new to the Forum and still waiting for my MK4 arrival (late October). However, saw this post on Sniper EFI and thought perhaps some might have advice in this general area.

Setting the picture... looking at BluePrint 306 and have recently been reading up on Holley Sniper EFI Kits. Looks like the full Sniper kit with in tank fuel pump is running around $1750 depending on the vendor. I see that the BP 306 also comes with the EFI option (that happens to be a Sniper)... but adds a $2K to the carbureted price (not sure if that includes the the in tank pump). So, that has me wondering whether to it is better to go with the carbureted motor and change out the carb for the EFI myself to save a little money... or just pony up and get the installed Sniper from BluePrint. After watching the Sniper videos, I am not afraid of the install. I do image that would screw with the warrantee (which is a significant advantage of the BP engine package). I guess an alternative would be to run the stock carb set up for the 3 years then change to whatever the latest and greatest EFI kit is at that point. Great idea of I was patient... but I want my cake and to eat it to... so to speak. Part of me also says that a modern Holley carb is still going to be a great performer and not give me many reasons to make me swear at it... so am I really going to regret not getting the EFI. ???

That being said... are there any experienced Sniper adders/users that could lend a machete to my intellectual thicket? Perhaps even someone who has gone down the same path and cares to share their experience?

I have the BPE 347 with Holley carb. It fires up immediately and comes to idle with no problems in Alabama at near sea level. It runs like a champ with no hiccups or sputtering. I was just telling my wife how happy I am I went with the carb option. clean and simple. I am a carb guy from years past with history working on my weber on my 1978 fj40. That being said I have tacked up the EFI wires behind the dash just in case I decide down the road to go EFI.

[Papa]

A couple of thoughts for you to add to your decision process.

If you go carb and then want to swap to EFI later, it will add some complexity. EFI runs at 60psi and a carb is about 7psi, so different pump depending on which way you go. The Sniper has a built-in regulator. You can run the Sniper in a return-less configuration, so it may not be necessary to run a return line. You will want to increase the size of the fuel lines for the Sniper to 3/8". Wiring is much easier with the body off the car. You'll want to plan for the O2 sensor when you decide on headers. The new ball-swivel headers from Factory Five will do the trick and will work with either carb or EFI.

I doubt that the warranty would be affected if you want to swap over to EFI, but just double check on that with BluePrint first.

Dave

[rich grsc]

All most no one changes from EFI to carburetor. Do it now and just don't think about having to make changes in the future

[CaptB]

A couple of thoughts for you to add to your decision process.

If you go carb and then want to swap to EFI later, it will add some complexity. EFI runs at 60psi and a carb is about 7psi, so different pump depending on which way you go. The Sniper has a built-in regulator. You can run the Sniper in a return-less configuration, so it may not be necessary to run a return line. You will want to increase the size of the fuel lines for the Sniper to 3/8". Wiring is much easier with the body off the car. You'll want to plan for the O2 sensor when you decide on headers. The new ball-swivel headers from Factory Five will do the trick and will work with either carb or EFI.

I doubt that the warranty would be affected if you want to swap over to EFI, but just double check on that with BluePrint first.

Dave

Just went through this with Blueprint, they are fine with the swap but I believe they want you to purchase the Sniper through them for warranty.

[Blitzboy54]

I built a 306 that was dyno'd with a carb and vacuum distributor. I then switched it to a sniper setup with the hyperspark ignition system. My engine so far has run flawlessly. You can have them dyno the motor with whatever they want and ship it to you without those parts and add later if that saves you money.