351 Swap EFI Intake Fitment - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 19 Old 04-07-2019, 09:54 PM Thread Starter
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351 Swap EFI Intake Fitment

Lots of old & not very much new information on what 351 based intake combos fit with what size hood in the fox chassis.

*** Hp/torque numbers & single vs dual plane comments need not apply here.

Can some of the 351 corral squad members here post an updated intake / elbow / throttle body / hood combo that you personally use.

It would also be a great opportunity for you to show off your goods if you have up to date pictures

Thanks,
Layzie

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post #2 of 19 Old 04-07-2019, 11:04 PM
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They'll go under a stock hood with the right mounts and K-member spacers. I didn't want to do that, went with a Cervini's 4" hood. Super victor EFI with 6016 elbow and a copy of an AFM 4" power pipe (home-made). Car's in for paint, so no pics other than a poor pic of it unpainted.

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post #3 of 19 Old 04-07-2019, 11:59 PM
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Wondering also. Got a 408w on a stand with a trickflow r-series intake. Running a 2 steel hood and dont want much more if possible. Hoping with 3/8 intake spacer, trimming the bracing on the hood, and vert mounts might make it work. If not, hopefully no more than a 3 cervini.
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post #4 of 19 Old 04-08-2019, 12:25 AM Thread Starter
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Quote:
Originally Posted by toddturbo View Post
They'll go under a stock hood with the right mounts and K-member spacers. I didn't want to do that, went with a Cervini's 4" hood. Super victor EFI with 6016 elbow and a copy of an AFM 4" power pipe (home-made). Car's in for paint, so no pics other than a poor pic of it unpainted.
Supervic
6016 elbow
4 customfab.

Thanks for sharing. Get us some pics when the paint is done


Quote:
Originally Posted by Black93coupe View Post
Wondering also. Got a 408w on a stand with a trickflow r-series intake. Running a 2 steel hood and dont want much more if possible. Hoping with 3/8 intake spacer, trimming the bracing on the hood, and vert mounts might make it work. If not, hopefully no more than a 3 cervini.
Reason for getting an up to date thread of this.

Lots of 351s here. Hopefully they will all chime in soon as well.
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post #5 of 19 Old 04-09-2019, 06:43 PM
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TFS 351R intake here, some brand of poly motor mounts on MM K-member, engine mounted 1" back, either 1/2" or 3/8" K-member spacers, 2" Steeda/Kaenen cowl hood. It just clears - the hood touches the breather nipple on top of the TB.
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post #6 of 19 Old 04-10-2019, 09:33 AM
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This is a Cougar but I know fitment in a Fox Mustang is similar.

Edelbrock # 29245 Super Victor EFI 351W Intake 6.25"
Edelbrock 3848 elbow 5.04"

Combined height above china wall = about 11.4"

Height above engine mount pads on block = about 20":



(useful because one can put engine mounts in engine bay, put a flat plate across them, then place extended tape measure at approx spot of elbow and close hood onto tape measure tab to get available height)

Fits under stock flat hood.

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post #7 of 19 Old 04-11-2019, 01:42 AM Thread Starter
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Great information cougar!

Whos next?
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post #8 of 19 Old 04-11-2019, 03:02 PM
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What is the purpose of this thread? Are you trying to see what path you want to take with build? Or just hood fitment? I have a 9.5 deck with a TFS Box R intake, procharger f1c, 2.5” Boss Inc hood, AJE tubular K, solid mounts. Would any of my measurements help you?
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post #9 of 19 Old 04-12-2019, 12:10 AM
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Box R heavily modified, Boss Inc. Hood, Energy Suspension Mounts, 90mm Accufab...
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post #10 of 19 Old 04-12-2019, 11:12 PM Thread Starter
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Quote:
Originally Posted by AtomicCoupe View Post
What is the purpose of this thread? Are you trying to see what path you want to take with build? Or just hood fitment? I have a 9.5 deck with a TFS Box R intake, procharger f1c, 2.5 Boss Inc hood, AJE tubular K, solid mounts. Would any of my measurements help you?
Atomic that aftercooler is just


Me personally, I researched the box R & Found the information I needed to talk myself out of it due to fitment issues. Realized that it took an absurd amount of time to come to that conclusion since so many posts were scattered and outdated. Wished there was an updated thread on it and that is the purpose of this thread.

My hood is 2.5
Since Im on the street I fear the marriage between drop mounts & longtubes. Im most likely going to go with the pro-m intake as they state it is only 5 and flows the same as a supervic. Then use a 4bbl with a carb hat to fender well MAF. Thus equaling 12 of total heigh needed.

Should fit just fine.


There is a member here who is selling reduced height milled spacers for the box r. Hopefully he chimes in as well.

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post #11 of 19 Old 04-12-2019, 11:13 PM Thread Starter
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Originally Posted by turboLXstang View Post
Box R heavily modified, Boss Inc. Hood, Energy Suspension Mounts, 90mm Accufab...

Do you turn that engine over much? Its looks.... beautiful
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post #12 of 19 Old 04-13-2019, 06:34 AM
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Originally Posted by turboLXstang View Post
Box R heavily modified, Boss Inc. Hood, Energy Suspension Mounts, 90mm Accufab...
Beautiful!! Get some dust on that engine.....making us look bad!

Stock block 306, V1 T-trim, AFM B-451 cam, TFS Twisted Wedge, Holley Systemax, A1000, Snow Meth, TKO 600, Team Z, Strange, MM, Lakewood and Moser helps me go forward fast.
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post #13 of 19 Old 04-13-2019, 06:46 AM
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Quote:
Originally Posted by Layzie View Post
Quote:
Originally Posted by AtomicCoupe View Post
What is the purpose of this thread? Are you trying to see what path you want to take with build? Or just hood fitment? I have a 9.5 deck with a TFS Box R intake, procharger f1c, 2.5” Boss Inc hood, AJE tubular K, solid mounts. Would any of my measurements help you?
Atomic that aftercooler is just [IMG class=inlineimg]/forums/images/Corral_net_2015/smilies/tango_face_surprise.png[/IMG]


Me personally, I researched the box R & Found the information I needed to talk myself out of it due to fitment issues. Realized that it took an absurd amount of time to come to that conclusion since so many posts were scattered and outdated. Wished there was an updated thread on it and that is the purpose of this thread.

My hood is 2.5”
Since I’m on the street I fear the marriage between drop mounts & longtubes. I’m most likely going to go with the pro-m intake as they state it is only 5” and flows the same as a supervic. Then use a 4bbl with a carb hat to fender well MAF. Thus equaling 12” of total heigh needed.

Should fit just fine.


There is a member here who is selling reduced height milled spacers for the box r. Hopefully he chimes in as well.
You are right about the pain it is as far as fitment goes. Also about dealing with mounts which turns into header clearance issues. After my build was done, turns out my headers hang waaaaay too low, but is what it is for now. Sucks spending $1,200 on a pair of Kooks just to find they hang unnecessarily too low, but I’ll address that soon.
Sounds like a cool build and update us with pics of that setup.
That members name is blue351. I am actually using one of his 1/2” spacer. He make a real quality piece. Fit and finish are top notch. It helps alleviate some clearance issues, but only so much.

Stock block 306, V1 T-trim, AFM B-451 cam, TFS Twisted Wedge, Holley Systemax, A1000, Snow Meth, TKO 600, Team Z, Strange, MM, Lakewood and Moser helps me go forward fast.
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post #14 of 19 Old 04-13-2019, 10:28 AM
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I'm gonna be self-serving here and re-post the info from another thread so it's all in one place:

Quote:
Originally Posted by Enhanced quote by Cougar7.0

These are all heights above the china wall:

Holley 300-242 Hi-Ram = 11.41"

Supervic + 3848 elbow = 11.29" + gasket (~11.4")

TFS Box R (5L - lower = 4.625") = 12.25" (peak)

TFS Box R (5.8L - lower = 5.375") = ~13"

For the Box R, a thinner spacer can gain up to 3/4" (pretty sure distributor clearance becomes an issue below 1/2" lower, so you're looking at 12.5" height)

Note the "Box-R" like the Hi-Ram has it's height pretty far forward, which makes the height issue significantly worse. For instance, I have a SuperVic + 3848 (~11.4" or about the same as a Hi-Ram), but when measured at the location where the Hi-Ram peaks, I only have 11.25" there Mustang hood-slope maybe be a little different than a Cougar, but not significantly. Guess y'all are lucky Mustangs look OK with a big cowl hood.
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post #15 of 19 Old 04-13-2019, 11:12 AM Thread Starter
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In place of the elbow has anyone looked at using a carb hat for Naturaly Aspirated or FI?

The elbow gets bashed for its unequal dist of air yet there is no mention of the hat style design.. it may be better or worse.

Perhaps Ed and Tmoss will make their way here and shed light on the topic.

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post #16 of 19 Old 04-13-2019, 11:47 AM Thread Starter
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Sounds like a cool build and update us with pics of that setup.
Yes I will. I also plan to document it all.

Everything arrives next month. It will be a lot of work as my car is bone stock so literally the entire full 351 swap Along with every single supporting mod (no mater how big or small) will be in my garage. From the radiator, to engine to trans to rear end all the way to the exhaust tips And not skipping a single thing in between.

Once done I will take to a Dyno (just for fun) and post a guess the numbers thread and plan to give away a prize to the winner. Something big like a custom Ed cam or new headers or cash.
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post #17 of 19 Old 04-15-2019, 12:43 PM
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Quote:
Originally Posted by Layzie View Post
In place of the elbow has anyone looked at using a carb hat for Naturaly Aspirated or FI?

The elbow gets bashed for its unequal dist of air yet there is no mention of the hat style design.. it may be better or worse.

Perhaps Ed and Tmoss will make their way here and shed light on the topic.

Well, I'm gonna give my opinion.

Those carb hats are for boosted carb designs. They have the advantage of blowing into 4 venturis which helps straighten the airflow some. They generally are shorter and flow less than typical 4150 EFI elbows (I've seen 650 CFM quote for a shortie and 900 CFM quoted for a taller high flow version.) Some carb hats do have internal dividers to help with distribution, though they create vortexes that can interfere with a carbs boosters.

EFI elbows like the Edelbrock 3848 I use flows about 1100 CFM and has a divider in it to help with airflow distribution - see below:

NO FIN:

WITH FIN:


I can't find this sort of information for carb hats other than some have dividers to help equalize flow up to 1300HP (I guess they recommend removing above that power level due to the vortex issue and boosters, an issue you won't have. So, if you do use a carb hat, try to find one with a divider in it to help with air distribution.
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post #18 of 19 Old 04-15-2019, 06:44 PM Thread Starter
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And I was told to get one without a divider.....


Hmm maybe this is why Ed makes those "under the breath" posts about forgetting the 4150 all together for a 400" + SBF and going with the 2828 4500 flange... OR then maybe we will be in the exact same boat & wondering if a 4500 elbow is better than a 4500 carb hat and to divide or not to divide..


Ohh the madness!!!

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post #19 of 19 Old 04-15-2019, 11:38 PM
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It was out getting some dust on it over the weekend...
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