Didn't want to loose an update with the couple issues I have had recently. It is much better, but not perfect yet.
I am using a combo of the progressive linkage and throttle extension. It now has a lazy roll in which is exactly what you want for everyday driving. The jerkiness at low rpm is gone because all 4 are not firing. I have the secondary jets coming in at 50%. MPG is between 16 and 19 gong to and from work on a combo of back roads and 60 mph driving. Still shooting for the low 20's
The secondaries are consistently coming back to 2/3 percent and sometimes 0. I do still have to knock it down to get it to 0 most of the time. Holley has given me a couple programing changes to see if it works. I will have to play with or get a tune sent to me to smooth out when the two other injectors fire.
Getting happier and happier with it as I iron out the gremlins. I do think Holley should have solved most of these on their end.
1950 Chevrolet 3100 (Ol' Roy) 1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
It's impressive how much better the progressive linkage makes it. You would think it would come that way, but I guess they want to make that extra money. Glad it worked out for you.
1941 Chevrolet AL 3/4 Ton previous Portsmouth Ohio Fire Dept 1959 Chevrolet 3100 1966 Chevrolet C10 "Sunoco Truck" 1986 Chevrolet C20 Crew Cab 454 lowered 6" 1991 Chevrolet R1500 Suburban LS 6.0/4l80e swap lowered on Qa1 coilers 1994 Chevrolet c1500 lowered 2/4 on 17x11 Billets 2000 Chevrolet Silverado 1500 full custom on air bags.
Have had the new sniper II on for a bit this winter. Seeing my wife backed into the garage door and completely screwed things up so we can't keep heat in the garage I decided to see how the sniper does in the cold. Been very cold last couple weeks. Inside of garage was 10 degrees this afternoon. Let the pump cycle and it fired immediately. Idled to 1300 for 10 seconds and then came back below 1000.
Will it be possible for the idle to be dropped to he specs for that engine?
It is for the most part. Short period of time it's under 1k. After a couple min it's at 800. When warm it's at 700. If I set the idle at 650 it struggles to get it below 680
Ferris, did you order the Holley master kit? I found the instructions are somewhat vague. The fuel regulator was not tapped for the supplied bolts. There is not enough fuel line (tank is under bed) for 2 runs. Discrepancy in instructions. 1 page says fuel pump colored wire is negative, another page says same wire is positive. Lots of fittings but no direction on where they go. My friend and I spent 3 hours going thru all this and now have a plan. Luckily friend is putting efi in his camaro, so required extra fuel line and other misc hardware, costs will be split.
I took a brave step and left the comfort of close to home and took the truck to a training.
Had 3 hrs of straight hwy. Did between 65 and 70 whole way. Achieved 18.5 mpg. I am going to mess a little more with timing and afr to see if I can hit 20 on way home.
Discrepancy in instructions. 1 page says fuel pump colored wire is negative, another page says same wire is positive. t.
I did this and when I tried to fire it wouldn't. Scratched my head on it for a while. Cracked unit fuel line and got nothing on prime. Put fuel down the line to the pump. Nothing again on prime.
Tried switching the wires and walla, fuel to unit.
Talked with Ferris today. Sent him a pdf on which is pre filter and which is post. Supplied instructions did not state which one is pre or post. Thru some internet sleuthing, I found a pdf from holleys website that has parts list and cross reference part # for the filters. Parts list states which is pre and post filters. The supplied instructions show a diagram of pump and filters. Pre is 40-100 microns, post is 10 microns The supplied pre filter is 20 microns, per Wix part numbers.
Take note Holley your instructions needs proofreading and user tested
I did get her running for a short time until some mechanical issue popped up. Will explain in next post.
Mechanical side of installation on holley sniper 2. I'll caveat this 383 has been sitting for 7 years It was winterized and in heated storage. Before starting iI put fresh oil in. Fogged cylinders and poured oil on valve lifters and springs. Fresh plugs
Used starter to get oil pressure.
Only 2 issues surfaced. 1. Had to buy fuel pressure regulator and fitting 2. Fuel regulator bracket screws interfered with mounting the regulator. Used pop rivets to mount bracket to firewall.
Cycled key for fuel pump to check for leaks. None yeah!! Set parameters in handheld control box. Hit starter and immediately fired up. Idle was way to high. 2000 rpm....had to set lower idle on throttle body.
Ran excellent great throttle response.
Noticed a clicky clack rocker noise. I'm glad this noise occurred. We pulled valve cover off to tighten loose rocker.
And there in the oil gully were what looked like small worms. What ??? Finally figured out they were valve stem seal retainer springs. Only found 4 in each bank These are vortec heads. Only thing we could figure out is the seals had dried out. So pull headers, plug wires, disconnect sniper electric system. Use compressed air in each cylinder at tdc and replace seals.
I GOT A VORTEC WORM INFESTATION.
Last edited by Canine man; 04/09/202512:40 AM. Reason: Nomenclature
I watched a Youtube video on the Sniper install compared to the FiTech install a couple of days ago. He complained about the instructions. He said he ended going to their website and downloaded a much more detailed installation manual. He might have said he paid for the download. He brought up a lot of the same issues that you did with the kit. I'm sorry but I don't remember what his channel was. You might be able to search it. He complained that he bought the Sniper 1 a week before Sniper 2 came out and they didn't tell him. I think he said the FiTech was $800ish and the Holley was $1200ish. It seems to me he threw the Fitech away. I know nothing about EFI.
