Holley sniper efi
Racer
Joined: Jul 2015
Posts: 396
Likes: 101
From: Lehigh Valley Pennsylvania
I did just what you said and had 97psi and blew in tank line and connected back and got 40psi. Pump is sucking strainer closed. Draining tank now so I can drop it and put new strainer on. Thanks for your reply to my frustration Sir. I feel better now at least knowing whats wrong.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 175
Likes: 12
From: Jacksonville NC
EFI Sniper
Put 175 miles and vette today and man it runs great. First 70 mile in stop and go traffic in city and I checked mpg and it got 17.8 and still in learn mode so hope it get even better.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
Put 175 miles and vette today and man it runs great. First 70 mile in stop and go traffic in city and I checked mpg and it got 17.8 and still in learn mode so hope it get even better.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
I am going to do the gas tank and the Holley ignition too. The whole thing.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 175
Likes: 12
From: Jacksonville NC
Efi
it's the best upgrade choice I've made for the vette. I'm very pleased so far and it's just getting better and better the more I drive it. Great start up, great throttle response, great idel with this 512 lift cam and no overwhelming fuel smell like*the quadra jet had.
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Racer
Joined: Mar 2017
Posts: 324
Likes: 60
From: Torrance Ca
Racer
Joined: Nov 2011
Posts: 285
Likes: 36
From: Cedar Park TX
Can you get a different radiator hose? may be get a kit and build yourself one?
Drifting
Joined: Jul 2012
Posts: 1,255
Likes: 297
From: Slovenia, EU
2017 C3 of Year Finalist
Burning Brakes
Joined: May 2004
Posts: 996
Likes: 13
From: Dallas TX
"The Sniper EFI System comes with a built in fuel pressure regulator, factory set at 58.5psi. We recommend at least a 3/8” feed line and 3/8” return line"
Since Holley recommends a 60psi @ 50gph fuel pump for the Sniper then you will probably be right on the edge of overworking your fuel pump when your engine is at idle.
From Grumpys:
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
From the Holley EFI manual:
"The Sniper EFI System comes with a built in fuel pressure regulator, factory set at 58.5psi. We recommend at least a 3/8” feed line and 3/8” return line"
Since Holley recommends a 60psi @ 50gph fuel pump for the Sniper then you will probably be right on the edge of overworking your fuel pump when your engine is at idle.
From Grumpys:
"The Sniper EFI System comes with a built in fuel pressure regulator, factory set at 58.5psi. We recommend at least a 3/8” feed line and 3/8” return line"
Since Holley recommends a 60psi @ 50gph fuel pump for the Sniper then you will probably be right on the edge of overworking your fuel pump when your engine is at idle.
From Grumpys:
Drifting
Joined: Jul 2012
Posts: 1,255
Likes: 297
From: Slovenia, EU
2017 C3 of Year Finalist
Put 175 miles and vette today and man it runs great. First 70 mile in stop and go traffic in city and I checked mpg and it got 17.8 and still in learn mode so hope it get even better.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
Before I could not lock tourqe converter up unless I was doing at least 70 or it would buck a little bit, but with the Holley Sniper system it can lock up as soon as 45 and it is smooth as butter. What a difference so impressed. I used the factory fuel line 3/8 and 5/16 return line and no issues at all works perfect. Best money I've spent for any upgrade.
If anyone is on the edge of pulling the trigger on the sniperits a great investment if you are going to be driving it! If it's just a once or twice a year car just keep your money and quadra jet.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
The return at the top isn't a problem. The lack of anti-slosh plates in the factory tank is. Whenever the fuel level is low it sucks air in tight turns. I lived with it for a while and then spent the $$$ on a custom tank with slosh plates and in-tank pump.
Drifting
Joined: Jul 2012
Posts: 1,255
Likes: 297
From: Slovenia, EU
2017 C3 of Year Finalist
Found this setup! Good thinking!
https://www.corvetteforum.com/forums...post1591586870
I have a 71 so that would work for me!
https://www.corvetteforum.com/forums...post1591586870
I have a 71 so that would work for me!