Low rise manifold and air filter for 2 bbl Sniper

[1975 DSE]

Recently installed a 2bbl 2300 Sniper on a stock 302. Now I have the engine out and it's getting converted to a 347 stroker. I am keeping the 2 bbl EFI. My question is, who makes a low rise manifold, dual plane, that will fit my 2bbl Sniper? Question 2, can I fit an aftermarket air filter with this setup? No body lift. No EGR.

I read all of the posts and most are 4bbl topics or for Broncos with a body lift.

 

[DirtDonk]

Actually, the more common four barrel manifolds don’t even need a body lift. Choices from Edelbrock, Weiand and others are low enough to fit a carburetor without a lift.
A 1 inch lift just gives you that much more room to work with and a little safety factor/fudge factor.
I just don’t think anybody makes or very few companies make a higher performance aluminum two barrel manifold. Perhaps some offering from a more modern Ford engine maybe?
A 95 or prior? Heck, even factory manifolds were often four barrel.
The most common alternative I think is to use the aluminum 4-barrel manifold, to save weight, and then use a 2-bbl adapter.
I don’t know that that’s the most efficient method, but it gets you your lighter weight aluminum manifold, and the potential for a four barrel upgrade in the future.

All that said, maybe somebody knows of a two barrel manifold on the market. I would think it would come from the race categories, but that might make it too high for hood clearance.

 

[Broncobowsher]

I don't know of any performance 2-barrel intakes. They are all about the same. Keeping the 2-barrel Sniper and running an adaptor to a 4-barrel intake will make clearance worse.

How is the 347 going to be built? What parts are going into it? I'm asking because just making it a 347 doesn't automatically turn it into a performance piece. You may end up with a poor mix match of parts that may not be as good as a regular 302 at the end of the day. Trying to keep the 2-barrel is an alarm bell in my head this may be happening.

 

[badandy73]

Know it's not the answer you're looking for but think you're going to be choking off that 347 with the 2-barrel setup. Would be easy to swap on a 4-barrel unit; harness/ sensors should all be the same just plug them in, reprogram the handheld and you'd be set.

That would also minimize your manifold height not having to run a spacer, etc.

 

[Broncobowsher]

That's why I was asking about the setup.
If there is a set of good heads, a nice cam, this is going to be a horrible running engine. The 2-barrel isn't known for high airflow. If you can't flow the air, the displacement will make the engine reach it's choke point much sooner. At which point a basic 302 is likely to out perform the 347. Doing the bench racing, the 347 should have a little advantage at low RPM where the airflow isn't enough of a demand. But a performance cam and heads could take that advantage away. At that point just do a 351.

 

[Johnnyb]

That's why I was asking about the setup.
If there is a set of good heads, a nice cam, this is going to be a horrible running engine. The 2-barrel isn't known for high airflow. If you can't flow the air, the displacement will make the engine reach it's choke point much sooner. At which point a basic 302 is likely to out perform the 347. Doing the bench racing, the 347 should have a little advantage at low RPM where the airflow isn't enough of a demand. But a performance cam and heads could take that advantage away. At that point just do a 351.

I disagree about some aspects of the statement regarding 2-bbl manifold/EFI. I think it will run great and provide low-end torque (or at least not reduce it). For max-performance at R's, 4-bbl is the way to go.

Here is the plenum I used: Spectre Performance 751 Passenger Side Low Profile Single Plenum Kit with 45°/90° Tube - Amazon

-JB

 

[1975 DSE]

Actually, the more common four barrel manifolds don’t even need a body lift. Choices from Edelbrock, Weiand and others are low enough to fit a carburetor without a lift.
A 1 inch lift just gives you that much more room to work with and a little safety factor/fudge factor.
I just don’t think anybody makes or very few companies make a higher performance aluminum two barrel manifold. Perhaps some offering from a more modern Ford engine maybe?
A 95 or prior? Heck, even factory manifolds were often four barrel.
The most common alternative I think is to use the aluminum 4-barrel manifold, to save weight, and then use a 2-bbl adapter.
I don’t know that that’s the most efficient method, but it gets you your lighter weight aluminum manifold, and the potential for a four barrel upgrade in the future.

All that said, maybe somebody knows of a two barrel manifold on the market. I would think it would come from the race categories, but that might make it too high for hood clearance.

I understand. Why make performance parts for a 2bbl when you can just switch to a 4bbl.

 

[1975 DSE]

I disagree about some aspects of the statement regarding 2-bbl manifold/EFI. I think it will run great and provide low-end torque (or at least not reduce it). For max-performance at R's, 4-bbl is the way to go.

Here is the plenum I used: Spectre Performance 751 Passenger Side Low Profile Single Plenum Kit with 45°/90° Tube - Amazon

-JB

That is what the shop says. I'll know in a week or so.

 

[1975 DSE]

I don't know of any performance 2-barrel intakes. They are all about the same. Keeping the 2-barrel Sniper and running an adaptor to a 4-barrel intake will make clearance worse.

How is the 347 going to be built? What parts are going into it? I'm asking because just making it a 347 doesn't automatically turn it into a performance piece. You may end up with a poor mix match of parts that may not be as good as a regular 302 at the end of the day. Trying to keep the 2-barrel is an alarm bell in my head this may be happening.

The shop is confident that it is being built correctly. Sniper 2300 specs show max horsepower to be 350.

 

[1975 DSE]

Know it's not the answer you're looking for but think you're going to be choking off that 347 with the 2-barrel setup. Would be easy to swap on a 4-barrel unit; harness/ sensors should all be the same just plug them in, reprogram the handheld and you'd be set.

That would also minimize your manifold height not having to run a spacer, etc.

I know at first I ordered a 4bbl by mistake and sent it back. The 2bbl is installed now. I will go back to the 4bbl as a last resort. And yes now I see the height problem with 4bbl manifolds...

 

[Broncobowsher]

The shop is confident that it is being built correctly. Sniper 2300 specs show max horsepower to be 350.

May be, but the intake is the choke point. Performance 2-barrel intake manifolds are an oxymoron. A 2 to 4 barrel intake adaptor on a 4-barrel intake would be your best bet for performance. But that adaptor takes hood clearance.

Now if you get outside of the bolt on fixes, aftermarket intake, mill the intake pad down. Weld on a plate that has the 2-barrel bolt pattern, probably mill that down as well as it will likely warp during the weld process. I bet you could shave an easy inch off the height by doing that. But it is labor involved (not just a bolt on) and requires access to tools and skill sto run those tools (aluminum welding, cast no less and milling machine)