Opinions on EFI? - Chevelle Tech
EFI Caution: Beyond here be monsters...

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post #1 of 31 (permalink) Old Jul 14th, 19, 12:08 AM Thread Starter
Scott Scheffer
 
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Location: los angeles ca
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Opinions on EFI?

Hi all,
I have a 67 El Camino, and although the body work isn't completely finished, out of boredom, I switched to the mechanical end of things. I bought a gen1 350 and had a machine shope bore it out twenty thousands, put in flat top pistons, and I'm about to put Vortec 062 heads on it over the next couple of days. I changed the stock valve springs to accommodate a nice retrofit roller cam with .480 intake and .487 exhaust lift, and with the roller lifters and roller rockers I think it has potential to run nice.
I'm pretty set on fuel injection. I've only done a quick couple of google searches and really don't know much about efi and now I'm wondering about the wide price range. I'm looking to make this thing into a nice driver. I'm 64 tomorrow, so not really interested in racing, but would love it to run smooth, and be gutsy when leaving the red light.
Any opinions on an EFI set up? Would love to hear them so I can get started with some serious shopping. I'm - like most people - trying to do this as inexpensively as I can, but at the same time I don't want to be disappointed in the outcome.
Thanks a lot for any opinions - I love this forum!
Scott
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post #2 of 31 (permalink) Old Jul 14th, 19, 12:34 AM
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Chris
 
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If you have to buy a carb, don’t waste your money and go get a Holley sniper 650 setup.

I put on a Holley super sniper 1250 on my ride, logged 4200miles in a road/race week trip that varied from 1000-14000ft. I never had 1 glitch to speak of and my fuel mileage went up from 8 to 17 depending on the speed I traveled. It started every time I crank the key. It never flooded, vapid locked, and boiled fuel. Self learning function made everything a breeze.

Would I recommend it... highly!
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1968 Beaumont
502 big block
Stock looking, definitely not stock sounding
HP and ET not determined yet!
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post #3 of 31 (permalink) Old Jul 14th, 19, 6:38 AM
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Ed
 
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Re: Opinions on EFI?

Start with fuel, tank-pump-wiring-lines. After that think of budget left for efi. That part can add up quick, if you are a cheap bastard like me, I used 1994 Buick Roadmaster plastic tank, Corvette return pressure filter, nylon lines and fittings, and a new factory pump. So that only added up to a couple three hundred bucks on top of the EFI itself. And fuel is %90 of the work, the EFI itself is simple.

1967 El Camino Malibu - Deepwater Blue
ZZ4 350, FiTech 600 complete!,Roadmaster tank, 700R4, Underdash A/C in progress, JGC Steering, 1990s truck serpentine.
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post #4 of 31 (permalink) Old Jul 14th, 19, 7:01 AM
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Rick
 
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Re: Opinions on EFI?

Go with an in-tank fuel pump. Not an inline fuel pump. The inline pumps have a tougher time pulling fuel out of a tank and people seem to have more problems with fuel pressure and delivery at the engine fuel rail.

Rick

1970 El Camino under Reconstruction - 5.3L LS VORTEC Engine and 4L60E Transmission
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post #5 of 31 (permalink) Old Jul 14th, 19, 7:21 AM
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Jeff
 
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Re: Opinions on EFI?

I'd leave the Quadrajet in there and install a 1/4" return line if you don't all ready have one..
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post #6 of 31 (permalink) Old Jul 14th, 19, 11:10 AM
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Quote:
Originally Posted by hydro462 View Post
I'd leave the Quadrajet in there and install a 1/4" return line if you don't all ready have one..
Exactly 👍
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post #7 of 31 (permalink) Old Jul 14th, 19, 12:09 PM
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Justin
 
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EFI was one of the best decisions I’ve made on this car. The sniper is great. I also like the the edelbrock pro flo 4 set up.

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #8 of 31 (permalink) Old Jul 14th, 19, 1:59 PM
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Greg.
 
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Re: Opinions on EFI?

Holley Sniper http://www.jegs.com/i/Holley/510/550-516K/10002/-1 for my BBC when I get some more $$

If you want a cheaper route then one of these which will provide better Gas Mileage and good out of the Box setup

650 cfm https://www.jegs.com/i/Demon-Carbure.../1901/10002/-1

750 cfm https://www.jegs.com/i/Demon-Carbure.../1904/10002/-1

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/06/23
60' = 1.561
1/8 = 7.411 et / 90.18 mph
1/4 = ??.??? et / ??? mph


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post #9 of 31 (permalink) Old Jul 14th, 19, 2:05 PM
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Greg.
 
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Re: Opinions on EFI?

Do not know if you read this or not but it is a good read

https://www.chevelles.com/forums/89-...l#post11109540

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/06/23
60' = 1.561
1/8 = 7.411 et / 90.18 mph
1/4 = ??.??? et / ??? mph


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post #10 of 31 (permalink) Old Jul 14th, 19, 4:34 PM
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Re: Opinions on EFI?

I hear of so many problems and issues with the Holley sniper systems, all areas. I am a former Holley carb tech, but do like EFI, and have 4 Terminator systems on my vehicles, and not one problem with any of them, as opposed to myriad issues, problems and unhappiness on both Sniper and FAST Go systems.

I am now working on solutions for the Sniper ignition systems that do not have an adjustable rotor to phase rotor and timing signal parameters.
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post #11 of 31 (permalink) Old Jul 14th, 19, 6:21 PM
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Justin
 
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Quote:
Originally Posted by Dave Ray View Post
I hear of so many problems and issues with the Holley sniper systems, all areas. I am a former Holley carb tech, but do like EFI, and have 4 Terminator systems on my vehicles, and not one problem with any of them, as opposed to myriad issues, problems and unhappiness on both Sniper and FAST Go systems.

I am now working on solutions for the Sniper ignition systems that do not have an adjustable rotor to phase rotor and timing signal parameters.
Dave, I’m on the sniper forum. I swear I see people posting their problems with the units most are user installed incorrectly. Ecu failure immediately, O2 sensor taking a hike, or stuck injectors. I don’t have any RF interference or anything but many others do.

1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s
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post #12 of 31 (permalink) Old Jul 14th, 19, 6:50 PM
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Re: Opinions on EFI?

Well, a simple solution was the ones for the Terminator, NOT the mega-expensive Sniper disasters. I get all sorts of horror stories from all sorts of people, owners, people working in the business that have installed all sorts of EFI systems, and ALL of them are fit to be tied irritated with the Sniper and FAST Go idoicy. then, there is no follow up with parts to make other than GM and MSD small distributors workable, that is left to people like me, as nobody else wants to figure it out for use with a Ford, MOPAR, even the International Harvester ones I have just figured out without adjustable rotors. Some people actually want to run a stock looking distributor in other than a GM engine.


One person seeking a solution to use a system on a GM engine just sent me the link to the install sheets from Holley. He has a shop that has done over 1K installs of various after market EFI systems, with no problems, and he is just mad crazy it is so backwards with the Sniper. He wonders why Holley didn't leave the Terminator system ignition setup in place, so it will work without massive hassles.


I used to work at Holley, and I am a friend of Doug Flynn, the person that has run the EFI department for a few years, great fellow, extremely knowledgeable.

Anyone remember the last ongoing "you installed it incorrectly, that is why it doesn't work" fiasco that still goes on, and, on, and...on? PerTronix Ignitors. NOPE, they ARE NOT an HEI, either.
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post #13 of 31 (permalink) Old Jul 15th, 19, 1:19 AM
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John
 
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Re: Opinions on EFI?

I installed a Sniper on my 70 El Camino SS, along with a new EFI tank and a Holley filter/regulator, Russell braided lines. It was installed nearly 2 years ago, and has been totally problem free. I am not running any timing control or power adders, I only have a HEI ignition. I think that the people who seem to have issues are not paying attention to some of the basics. It seems that quite a few of the problems seem to come from Radio Frequency Interference (RFI) Pay attention to where you run your wiring. If you are running any Sniper wiring next to or parallel high tension wiring... spark plugs wires in particular, running them parallel to devices such as MSD units, etc. Take the time to purchase some RFI shielding for wiring, it may help you from experiencing problems. Also ensure you have good power connections to your battery. I use a dual terminal Optima battery, I use the top posts with my OEM spring ring clamps, and my sniper power comes from the side terminals. I also removed and plugged all the wires I am not currently using, they can be literally plugged back in at any time if they are removed correctly . Lastly, ensure your exhaust system is tight with no leaks. If you have a leak before or at the O2 sensor it will never run right! I would also suggest, if possible with your combination to install the Sniper in it's basic configuration... EFI only, get it dialed in and then start adding components. Throwing everything at it from the start if you are not an expert will likely increase your odds to hav an issue. Bottom line is I would install another in a heartbeat... in fact, I talked a friend into doing one on his old CJ5 with a 304!
I hope this helps.

70 El Camino SS 396/TH400
67 Cutlass Supreme convert LS3/4LE85
65 GTO convert Tri Power 4 speed
65 Corvair Corsa Crown Conversion (Mid engine 350)
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post #14 of 31 (permalink) Old Jul 15th, 19, 1:28 AM
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I have a proflo 3 xt system and really like it. Has worked flawlessly for 2 years so far.
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post #15 of 31 (permalink) Old Jul 15th, 19, 12:34 PM
 
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Re: Opinions on EFI?

I have a full Holly Sniper system with Hyperspark Dist. on my 71K10 and love it. No problems with install but it wasn't a drop-in and self learn affair. I suppose it could have been but the base timing tables suck and I modified mine which took some tuning effort via the laptop and software vs. the hand held.
Someone stated earlier that they went from 8 to 17 mpg after installing EFI....this is possible only if the carb. was way out of wack to begin with. If your carb is tuned right you might see 1-2 mpg or none at all when going to EFI but the overall drivability will be greatly improved. The K10 fired up immediately and settled into a smooth idle immediately this winter with -23 (F) temps. It also ran great on an off road trip in AZ with Fourwheeler mag with temps nearing 100(F) this spring.
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