Holley Sniper Install Questions

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Holley Sniper Install Questions

Post by Demoman » Fri Mar 12, 2021 12:04 pm

Getting ready to install a Holley Sniper with a Robb MC Surge Tank setup.

It is being installed on a 91 GW that is currently stock. My question is what vacuum/vapor lines have you removed or didn't need with the sniper set up?

At this point I plan on removing the air pump system as it is currently not even hooked up and the bowl vent to the canister.

I'm not sure what else can also be removed or what has to definitely stay other then the brake boost, interior controls and the possibly vacuum advance.

What have others done regarding this installation with the vacuum and vapor lines?

Thanks in advance for the information.

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Re: Holley Sniper Install Questions

Post by 1979bettywhite » Fri Mar 12, 2021 1:32 pm

I can't comment on the vacuum and vapor lines as I did not change anything there.

I can recommend getting a progressive linkage from EFI System Pros. Also, try to find a fixed orifice PCV valve. You can search here and find my post about tips for the Sniper install.

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Location: North Carolina

Re: Holley Sniper Install Questions

Post by Milktruck » Mon Mar 29, 2021 6:55 pm

Hey I’ve got a sniper install on my stock 360. I just had to reset my settings. Now I have a miss/backfire at higher rpm (highway speeds). Would you be able to share your timing settings for me to set a new baseline? I’m running the full hyperspark setup
1988 Jeep Grand Wagoneer

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