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Holley Sniper EFI Installation | 1967 Chevelle
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- เผยแพร่เมื่อ 3 ส.ค. 2024
- In this video we install a Holley Sniper EFI system with the Hyperspark distributor on a family member's Big-Block Chevelle. This is our first time working with the Sniper system and created a step by step guide on how we installed, wired, and test drove the system. This installation happened over several weeks due to traveling and other projects so bare with us! Any questions feel free to ask them in the comments!
00:00 Introduction
00:31 Remove Battery & Drain Fuel
00:55 Removing Carb & Distributor
02:09 Installing Hyperspark
02:43 Plan Electronics Mounting
04:21 Fuel System Modifications
08:13 Oxygen Sensor
09:21 Fuel Pump Connections
16:10 Engine Bay Wiring
17:58 Temp Sensor
18:50 Wiring Overview
20:26 First Start
20:46 Ignition Timing Baseline
22:23 Take It For A Spin
24:44 Final Wrap-Up
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Questions? Feel free to comment below or check out our website at retroformance.co
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*Videos are for entertainment purpose only, any repair or fix represented or shown may not apply to other applications. Please, do not try this stuff at home...
Great video. I’m planning on doing this to my 66 396 El Camino. This hit all the right issues I felt I would run into. I did read the comments. And I’m glad to hear I may not need the return fuel line. And the temp sensor should be on the intake. I’ll take that as lesson learned. I wish you had discussed the performance before and after. Also. When the motor was running and driving you should have cut the music. Otherwise great video. Thanks.
Hey thanks! For sure the video wasn’t perfect, but we tried to show a good step by step. I guess thats what the comments are for! People chiming in on different ways to do things, hopefully it helps others as well. Hope your El Camino upgrade goes well!
Ohhh, baby!! Nice job men!! Ben, your cinematic skills are great. Thanks
Thanks Pete! We’ve had a lot of help over the months so its nice to see it getting better!
Great quick step by step, so many people don't show some of the steps.
Thanks! We tried to make it something people could follow easily.
great video. well edited. went ahead and sub'd for some more. btw, you can just go "set static timing" and it'll lock the timing to whatever you set while on that screen. you'll wanna set to something you can read easily on the balancer.. i usually do multiple to be 100% across a few RPM ranges in case you have to adjust dwell/delay. and the other dude was right, it says on the product page for that pump - Fuel pressure is internally regulated to 58 psi eliminating the added expense and effort of purchasing and installing an external fuel pressure regulator - no separate return line is required because this module returns excess fuel right inside the tank!
Wow good to know! Thanks for the insight and info. Hopefully your comment helps someone not spend the time running a return haha
I think folks just set at a different position in the 60s. The steering wheel is way closer to you is the big thing versus a newer car.
Clean car
Thanks! We love it!
That looked like a Holley retrofit pump you installed which does not need a return as it should do all the work itself as far as pressure regulation.
Thanks for the feedback. Interestingly, when we called Holley and asked about this pump before ordering, the tech told us we needed a return line to use with this system. And the instructions with the kit also mentioned needing to add a return line. 🤷🏽♂️
@@Retroformance Thats bananas which is different from what I was told. The pump I used is the 12-308 though so there may actually be a difference.
@@kelleys81 that is odd! I guess maybe both ways are right? 😂
@@Retroformance seems like i remember it could be run return less but wouldnt support certain engines fuel demands if done that way. I could be talking out my ass but seems like I remember reading that.
Any problems with the Sniper off camera? I've seen other videos with people having problems with the sniper and having to return it to Holley for an exchange or they just end up putting a carburetor back on.
Customer has had no complaints so far! Only thing we struggled with the car was some funky wiring separate from the Sniper. I think the car could use a new main harness, but most of the time we need to operate within the customer budget.
I don't understand why they need a tube on the return line fitting , they are not sucking fuel out you are putting it in . ???
nice video. fun little car too. that music has gotta go when that engine is singing its tune though..lol
Thanks for the feedback! And so true! We were hoping to get the car back this summer for some real microphones and raw noises!
You know with that fuel pump module you don’t need a fuel return line, it has one built in. There is also an easier way to check base timing.
You need to look at Holley efi tanks or tanks they have one for chevelle
When we called the tech before ordering this pump, we were told it needed a return line, maybe this wasn’t true then.
@@RetroformanceI think ya should always run a return line keeps gas cooler, among other things
Have the same style unit in my nova. Self regulated no return line. Works absolutely perfect.
@thruitallauto2538 actually a return line heats the fuel. More line and friction from tank to motor back tank. One of the few reasons why most new LS motors have no return line
15 degrees after or before tdc ?
Before tdc
@@Retroformance is that the base timing for that engine in general or does holley have to be set that? Thats a confusion for me. Im doing a buick and going to add the cam driver to the stock hei. Stock it runs at 12 btdc. Ive got to read up on it more.
Should’ve pressure washed that fuel tank before doing anything.
My left ear got all the info but the right feels a little left out. Your return line Does not need a tube going to the bottom of the tank.🤣 It just needs to make it to the tank. gravity will do the rest. Your temp sensor I would argue is in the wrong location. Too close to the exhaust. electronics do not like being that close to that much heat. You are trying measuring the water temp, not the exhaust port on the head. Why not put in on the intake on a water jacket plug? Otherwise good video.
Thanks for the info. And you are right! Honestly I can't remember why I put it in that location. This video was done on the side over a month and a half. Looking back, I can't remember. So far it hasn't been an issue.
If you’re going racing Holley is way to go. For daily or weekend driver Edelbrock Pro Flo 4 far superior. Easier. Constant tweaking not needed like Sniper. Can be tuned quite extensively but not like Holley. Pick depending upon how much you want to mess with it and type of driving.
"1-10" after the collector", you say? that's weird, because my instructions say 6-10" lol.. i feel like someone drilled the hole before double checking and y'all just went with it lol. it'll probably work just fine. if anything you won't get a good blend of all 4 tubes. also, that clamp thing that comes with the sniper is trash.. throw it away and never use it.
Not to mention they never cleaned off the rust where they welded that O2 bung.
Hack install with all that rubber hose & zip ties. Did you really not clean off the rust off the header when you welded the O2 sensor bung? Smh...
Ps... Nice fanny pack.
I’ll call you next time and have you make me a one piece hardline!
Thanks, holds the Tascam for Audio
@@Retroformance I've done 100's of hard lines for cars! Plus I do believe that much rubber hose is not legal if you ever head to a drag strip... Kinda shows why it's never a good idea to use that much rubber hose for fuel lines.
Annoying music.
Thanks! Feel free not to watch 👍🏼
All that work for what? You won't get any better gas mileage. All you 've done is increase the likelihood of more gremlins you'll have to haunt down when the system goes awry. And it will go awry. $2100 for system, not including installation. $3,000 down the drain. Stick with carb, save your hard earned money.
turn off the annoying music.