Sniper installation
#1
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Hello.i have an 7.4mpi at the moment in my donzi 21, and im building a ~600hp 454 stroker by the side of it.
The 600hp engine is getting a sniper efi.
But im thinking of installing the sniper on the mpi engine first, just to get all the plumbing, sensors, electrical etc fixed and tested, so when the new engine is finished it will just pop right in.
got an imco exhaust so 02 bung will be easy, hell i might gain a few mph also.
From my understanding ill need a dual plane intake and a sniper kit, fuel pump etc.
However, what intake should I go for, i have closed cooling and no salt-water, so I'm going for an aluminum/car intake. And can anyone see if this is a round or oval port? Engine is in the boat and would love to start ordering parts.
![](https://cimg3.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1072x1920/received_1245385275840296_5e7b7988750efc64a108a19771ee716263f0bb58.jpeg)
The 600hp engine is getting a sniper efi.
But im thinking of installing the sniper on the mpi engine first, just to get all the plumbing, sensors, electrical etc fixed and tested, so when the new engine is finished it will just pop right in.
got an imco exhaust so 02 bung will be easy, hell i might gain a few mph also.
From my understanding ill need a dual plane intake and a sniper kit, fuel pump etc.
However, what intake should I go for, i have closed cooling and no salt-water, so I'm going for an aluminum/car intake. And can anyone see if this is a round or oval port? Engine is in the boat and would love to start ordering parts.
![](https://cimg3.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1072x1920/received_1245385275840296_5e7b7988750efc64a108a19771ee716263f0bb58.jpeg)
Last edited by Alexanderlindahl; 06-01-2022 at 01:15 AM.
#2
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From my menory, and reading, It should be the vortec oval port heads.
Ive been digging around the internet, and some people say that the sniper Efi works best with a single plane intake, and low rpm loss isnt as bad as a carbed app.
So should i go for a weiland track warrior / holley strip dominator rather than a Street warrior dual plane?
or, should i break the bank on one of these and "reuse" on the new engine?
https://www.holley.com/products/engine/intake_manifolds/carbureted_intake_manifolds/fabricated_sheet_metal/parts/835161
Ive been digging around the internet, and some people say that the sniper Efi works best with a single plane intake, and low rpm loss isnt as bad as a carbed app.
So should i go for a weiland track warrior / holley strip dominator rather than a Street warrior dual plane?
or, should i break the bank on one of these and "reuse" on the new engine?
https://www.holley.com/products/engine/intake_manifolds/carbureted_intake_manifolds/fabricated_sheet_metal/parts/835161
Last edited by Alexanderlindahl; 06-01-2022 at 02:11 AM.
#3
Platinum Member
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From my menory, and reading, It should be the vortec oval port heads.
Ive been digging around the internet, and some people say that the sniper Efi works best with a single plane intake, and low rpm loss isnt as bad as a carbed app.
So should i go for a weiland track warrior / holley strip dominator rather than a Street warrior dual plane?
or, should i break the bank on one of these and "reuse" on the new engine?
https://www.holley.com/products/engi...l/parts/835161
Ive been digging around the internet, and some people say that the sniper Efi works best with a single plane intake, and low rpm loss isnt as bad as a carbed app.
So should i go for a weiland track warrior / holley strip dominator rather than a Street warrior dual plane?
or, should i break the bank on one of these and "reuse" on the new engine?
https://www.holley.com/products/engi...l/parts/835161
#5
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Single Or dual? I feel torn about it.. The boat is light and easy to get on plane, so I don't need the torque badly. I cruise between 3-4000 rpm mostly.
#8