Author Topic: Holley Sniper?  (Read 2815 times)

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Holley Sniper?
« on: March 31, 2023, 10:55:54 AM »
Hey guys, I recently installed a Holley Sniper on the mid 90's vortec 350ci that's in my 1984 Custom Deluxe.
So far so good. I can't really comment much because I now need a transmission. So I haven't been able to put many miles on it.
I didn't post this so you guys could tell me to go back to a carb. I've heard all that.
I posted it to see if anyone has a good experience with the Holley Sniper on their truck?
I did the fuel cell and new lines and everything except the Hyperspark. My install is clean and neat.
It fires right up and is running smooth. Unfortunately I smoked my 700r4 on the maiden voyage.
The cable. I know.
So, post up your Sniper stories?  ;D

Offline Scott91370

  • Newbie
  • Posts: 48
  • Newbie
Re: Holley Sniper?
« Reply #1 on: March 31, 2023, 01:44:55 PM »
I don't know anything about the Sniper kit but sucks about your transmission!  It's amazing how that little TV cable can kill the 700r4 so quick.

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Re: Holley Sniper?
« Reply #2 on: March 31, 2023, 04:26:06 PM »
Yeah, it does.  :P

Offline Shifty

  • Senior Member
  • ****
  • Posts: 1009
  • I bleed Bowtie red...
Re: Holley Sniper?
« Reply #3 on: March 31, 2023, 04:33:29 PM »
I don't have one, but I'd sure like to know more about them and your experience with it.
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

98 C2500 ext cab longbed

Offline JohnnyPopper

  • Senior Member
  • ****
  • Posts: 2588
  • Old Goof
Re: Holley Sniper?
« Reply #4 on: March 31, 2023, 10:02:45 PM »
Don't know anything about the H S, but man is that a clean and well organized motor!

It's F.I. right?
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Re: Holley Sniper?
« Reply #5 on: April 01, 2023, 06:34:32 AM »
Don't know anything about the H S, but man is that a clean and well organized motor!

It's F.I. right?
Thanks for the compliment.
Yes, it is electronic fuel injection.

It seems this system can be tempermental.
If things aren't just perfect it's not happy.

If I had a transmission I'd be able to tell you more.  ;D
« Last Edit: April 01, 2023, 08:52:38 AM by macr0w »

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Re: Holley Sniper?
« Reply #6 on: April 01, 2023, 06:36:55 AM »
It looks like a 4 barrel carb.
But, it's not.
This pic is from before I moved my temp sensors around and got black hose clamps for my vacuum stuff.  ;D
« Last Edit: April 01, 2023, 08:53:53 AM by macr0w »

Offline JohnnyPopper

  • Senior Member
  • ****
  • Posts: 2588
  • Old Goof
Re: Holley Sniper?
« Reply #7 on: April 01, 2023, 07:40:34 PM »
Were you the one that had to limp home that overheated and wouldn't shift thru the gears?

Love how you went the distance with the plug wiring at the cap! I'll soon be an imitator!
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline fitz

  • Senior Member
  • ****
  • Posts: 2084
Re: Holley Sniper?
« Reply #8 on: April 02, 2023, 05:35:13 AM »
Looking forward to updates once you get your 700R4 sorted out.

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Re: Holley Sniper?
« Reply #9 on: April 04, 2023, 08:33:57 AM »
Were you the one that had to limp home that overheated and wouldn't shift thru the gears?

Love how you went the distance with the plug wiring at the cap! I'll soon be an imitator!
Yeah, I barely made it home.  :P
I always make my own plug wires.
The lengths premade wires come in never fit the way I want them to.  8)

Offline JohnnyPopper

  • Senior Member
  • ****
  • Posts: 2588
  • Old Goof
Re: Holley Sniper?
« Reply #10 on: April 04, 2023, 01:27:08 PM »
Have you tried to drive it since, like even up the driveway?
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline David Staines

  • Newbie
  • Posts: 9
  • Newbie
Re: Holley Sniper?
« Reply #11 on: June 18, 2023, 03:08:58 PM »
My sniper is finally in. I'm having a bit of difficult with one of my fuel pumps (left tank), but everything else seems to be running smooth. Getting the dual tank setup to run correctly was a bit of a challenge but I found a youtube video that had an interesting solution. I did a twist on it and was able to get everything up and going. It's so nice to have insta start on this 20 year old 350.

Offline David Staines

  • Newbie
  • Posts: 9
  • Newbie
Re: Holley Sniper?
« Reply #12 on: August 10, 2023, 09:45:14 PM »
There were two things that bothered me:

1) The throttle was too sensitive. This is a common problem for most cars with a sniper. Fortunately, there is an easy fix that costs $10 from any car parts store. It's a throttle assembly extension. The Sniper II has this fix built in.

2) A loud air rush / wining noise at mid range and heavy throttle. It almost sounds like a belt squealing. The fix for the noise is to install a quad port spacer between the carb and the intake. I used a 1/2" spacer and the noise went away completely. There are some fancy ones on the market if you want to look for a bit of a mid-range performance boost.

Offline Scaryfastatx

  • Newbie
  • Posts: 55
  • Newbie
Re: Holley Sniper?
« Reply #13 on: April 04, 2024, 07:33:44 AM »
Nice set up, I had been considering going with a sniper for my truck but was waiting to see how the old 305 would hold up before plunking down some cash for EFI

I was reading up on the Sniper 2 seems really awesome especially now that they can control the later electronic overdrive transmissions

Offline macr0w

  • Registered Users
  • *
  • Posts: 123
  • Newbie
Re: Holley Sniper?
« Reply #14 on: May 09, 2024, 07:13:18 AM »
I was reading up on the Sniper 2 seems really awesome especially now that they can control the later electronic overdrive transmissions
Isn't it great that Holley comes out with a sniper2 that solves all the problems I had to work around just as soon as I get my sniper1 installed?  ::)