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View Poll Results: Which Intake for 347 Build?
Bronco 5 62.50%
Mountaineer/Exploder/"Cobra" 3 37.50%
Voters: 8. You may not vote on this poll

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Old 01-13-2013, 09:33 PM   #1
Sloride75
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Truck or Mounty Intake for 347 build?

Well, my 86's 302 is getting tired. I've already pulled a junkyard 5.0 out of a 98 Mountaineer and plan on building a 347 out of it. The goal is to have a 300-350hp and 350-400tq for daily driving, towing and offroading. I've done quite a bit research and reading. I plan on using the GT40P heads, and doing a MAF conversion, mostly with parts I've already pulled. I will probably use a TwEECer to get it dialed in, when the time comes. I'm in no rush, as the current motor is still getting me to work and back (most of the time, haha).

I've read that the stock 5.0 Truck/Bronco intake is good. I've read that the stock Mountaineer intake is good, and is basically the same as the Cobra intake.

So my question is, will the stock Bronco intake feed a 347, or should I use the Mountaineer? I would prefer to use the Bronco intake, to avoid having to deal with throttle and, more importantly, TV cable linkage issues associated with a different intake. But if the "Cobra" intake is going to net "huge" gains over the Bronco intake, I'll go that route.

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Wide ratio AOD
9" rear w/ 4.11's
35" BFG Muds
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Old 01-16-2013, 08:41 PM   #2
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Bump. Really guys, over 100 views and no replies or votes? No opinions? Not even ridicule from the 351W crowd?! I know some of you are running 347's; what intake are you running?
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Old 01-16-2013, 08:59 PM   #3
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Originally Posted by Sloride75 View Post
Bump. Really guys, over 100 views and no replies or votes? No opinions? Not even ridicule from the 351W crowd?! I know some of you are running 347's; what intake are you running?
Okay Sloride

, since you're looking for comments and critiques I'll give you my two cents on your combo.

I've always read here that while the 5.8 stock truck intake leaves plenty to be desired, the same is not true of our 5.0 truck intakes.

They're supposed to be great for low end torque production and almost as good as aftermarket intakes at the top end (where our trucks rarely operate BTW).

I have no idea how much these fancy dew, higher rpm intakes cost, but I imagine they ain't cheap. I also know your GT40 heads ain't gonna recondition theyz-sef's for nuthin' neither !

You take that cookie jar money from both of those proposed "N-Deavours" and git yersef' a pair of brand new (ready to bolt on) AFR-165 aluminum cylinder heads and you'll be further ahead muh friend.

-brand new castings, valves, guides, seats seals, etc. True bolt-on

-aluminum means you still use 87 octane at nearly 9.65:1 compression

-you get that compression boost to help mileage and power

Articles here;

http://www.airflowresearch.com/articles_sbf.php

and specifically here;

http://airflowresearch.com/articles/article087/A-P1.htm

prove you get 100 hp AND 100 ft/lbs of torque with NO other changes. Even using the stock cam. Your GT-40s ain't-a-gonna git you anywhere near that !

These heads don't just beat ALL others at the high end, they beat EVERYONE right off the valve seat at low lifts (where trucks operate)

You asked

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Old 01-16-2013, 09:29 PM   #4
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Bronco intake.
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Old 01-17-2013, 10:50 PM   #5
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I dont have any experience with the performance of the truck 302 intake. When I was researching an intake upgrade for my 5.0 Mustang, I read over and over how the truck intake was awesome for the low end. IIRC, the hot ticket was a truck lower with a Hartman upper. Back then, I ended up going with the explorer setup. It was bolt-in.

Anyway, I would use the Bronco intake just to aviod having to re-route throttle cable, TV cable, intake tubing, etc. Also, 347s are torque monsters. In a heavy Bronco, you want the torque more than the HP.
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Old 01-18-2013, 10:27 AM   #6
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Bronco Info: 1994 Bronco Eddie Bauer edition, 302 MAF, E4OD
Get yourself one of these......$680 @ Summit or Jegs


One of these...$18.00 @ summit


A set of these... $28.00 @ Summit


Then one of these...$349.00 @ Jegs


A set of these AFR HEads....$1500.00 @ Jegs


One of these......$300.00

and a custom tune for $250

One of these.....$225.00 @ Jegs


Then hold on to the wheel.
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Old 01-18-2013, 10:31 AM   #7
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Aint it funny how one thing leads to another, then another, then another
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Old 01-18-2013, 05:15 PM   #8
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There is no need for an aftermarket Ford truck 302 intake.
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Old 01-18-2013, 06:28 PM   #9
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Theres no NEED for any aftermarket part, its all a matter of WANT.
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Old 01-19-2013, 09:23 PM   #10
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Quote:
...from both of those proposed "N-Deavours" and git yersef' a pair of brand new (ready to bolt on) AFR-165 aluminum cylinder heads and you'll be further ahead muh friend...
By "both", do you mean heads and stroker?

Great links, thanks!

Quote:
prove you get 100 hp AND 100 ft/lbs of torque with NO other changes. Even using the stock cam.
100 hp at 6200 rpm and 100 ft/lbs at 4300 rpm

Quote:
Your GT-40s ain't-a-gonna git you anywhere near that !
Nope, but I don't plan on spinning it that fast either!

Quote:
You asked

I did, and I sincerely thank you for the reply!!!

I figure I'm gonna rebuild the bottom end, might as well spend a (relatively) little more and make it a stroker. I think my stated goals are (relatively) conservative, and the ole iron heads should support it. I figure this way, if I ever do want to get crazy with it, I can swap the heads later...but doing so would also, I think, require new throttle body, new injectors, fuel pump, etc.

Thanks again for the input!
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Old 01-19-2013, 09:25 PM   #11
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Originally Posted by Andrew James View Post
Bronco intake.
Thanks!
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Old 01-19-2013, 09:32 PM   #12
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Quote:
Originally Posted by jowens1126 View Post
Get yourself one of these......$680 @ Summit or Jegs

One of these...$18.00 @ summit

A set of these... $28.00 @ Summit

Then one of these...$349.00 @ Jegs

A set of these AFR HEads....$1500.00 @ Jegs

One of these......$300.00
and a custom tune for $250

One of these.....$225.00 @ Jegs

Then hold on to the wheel.
= $3350, and I haven't even touched the block or rotating assembly!!!
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Old 01-19-2013, 09:41 PM   #13
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Quote:
Originally Posted by Sixlitre View Post
and specifically here;

http://airflowresearch.com/articles/article087/A-P1.htm

prove you get 100 hp AND 100 ft/lbs of torque with NO other changes. Even using the stock cam. Your GT-40s ain't-a-gonna git you anywhere near that !

Sixlitre
That article really has got me thinkin...maybe I won't even change the cam, just add 1.7 rockers. What do you think, 347, stock cam, 1.7's, GT-40P's, MAF, and a tune good for 300hp/350ftlbs?
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Old 01-19-2013, 09:46 PM   #14
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Quote:
Originally Posted by scld1354 View Post
I dont have any experience with the performance of the truck 302 intake. When I was researching an intake upgrade for my 5.0 Mustang, I read over and over how the truck intake was awesome for the low end. IIRC, the hot ticket was a truck lower with a Hartman upper. Back then, I ended up going with the explorer setup. It was bolt-in.

Anyway, I would use the Bronco intake just to aviod having to re-route throttle cable, TV cable, intake tubing, etc. Also, 347s are torque monsters. In a heavy Bronco, you want the torque more than the HP.
Thanks! How did the explorer setup work out for you?
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Old 01-19-2013, 11:27 PM   #15
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A Solid 347 Stroker will run you north of $8000 properly put together to last and thats not including all the other things you need to do to properly support it. Like higher flow fuel pump, top quality fuel filter, top quality fuel lines, top quality fuel pressure regulator, larger injectors, Upgraded transmission to deal with the increased torque, re-building and balancing your driveshaft, beefing up your rear end, upgrading your brakes, etc, etc, etc, its a never ending cycle.

Upgrading just one part of the system puts alot of stress on the other components. You dont HAVE to do all the other upgrades at once, you can wait for each to break and fix it then.
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Old 01-20-2013, 12:59 AM   #16
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Looks like the ol' pic 2 out of the 3 rule will come into play here.

Always like to see strokers in Broncos though!
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Old 01-20-2013, 03:34 PM   #17
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although i agree there will be more strain on the rest of the drivetrain, your not building anything insane here. I would stick to the stock bronco intake and do a gasket port job if your looking for that little extra. as far as afr vs gt40, i would closely look at the price comparison, you wont make that much more power with them (the afrs) but youll loose poundage and gain timing advance per octane. Also, if you decide to add boost (best hp/$ w/o question) down the road, aluminum will hod up much better.

i have a 342 stroker going in my stang (obv. built for higher revs but not a race motor), makes 390 rwhp with no boost, afr 185s, anderson out of box cam, and 590 rwhp with 11 pounds and a touch of meth cooling.
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Old 01-20-2013, 05:12 PM   #18
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Old 01-20-2013, 05:55 PM   #19
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Quote:
Originally Posted by Sloride75 View Post
By "both", do you mean heads and stroker?

!
Sloride

by both I meant adding the price of an only marginally better aftermarket intake and the cost of reconditioning used GT-40 heads together.

I meant I believed you'd find that those two costs, together, approached the price of a set of brand new AFR-165 heads (which would produce more power and torque than the GT-40 heads and aftermarket intake).

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Old 01-20-2013, 06:51 PM   #20
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Quote:
Originally Posted by Sloride75 View Post
That article really has got me thinkin...maybe I won't even change the cam, just add 1.7 rockers. What do you think, 347, stock cam, 1.7's, GT-40P's, MAF, and a tune good for 300hp/350ftlbs?
I'm no expert Sloride

but I do know that 347s are notorious (amongst Chev-a-lay circles) for producing WAY more power than you'd think they could.

As jownes says(cautions) they're also notoriously mo' expensive and have mo' complications (to build) than a stock block.

I'm an 86er, like yersef' and I "knows" your pains with them raised crown pistons. Some parts guy did me a favour when I replaced my longblock in 99', by spec'ing me a later block with normal pistons and open chambered heads.

No question, if you want to use any other head than your closed chambered E6 heads, you can't re-use that 86' shortblock, with them raised crown pistons.

So, yes being an 86er, you're in for a new later shortblock. The good news is you can purchase a replacement shortblock 302 for just over a grand all day long.

You can also grab a later truck engine used for very low dough and have a local machine shop recondition it or do the machining and you can assemble it. You "may" beat the cost of a shortblock or you may just have fun doing it your way. Either way, getting a newer year shortblock is dirt cheap.

Couple that with ONLY those AFR-165 heads and NO OTHER changes and you just built a uber-reliable 5.0 litre with an extra 100 ft/lbs of torque (and hp) for pretty cheap.

A lot of guys here told me the speed density is up to the task, particularly if you stick with your stock truck cam. Not having to go MAF will save you a pile of dough, complexity and keep you bone stock reliable.

After you get it running "surf city fine" with your speed density, then do some research, ask some questions and then maybe add your 1.7s later.

One mod that I'm doing, after reading nuthin' but good things about, is going to the later 4 squirter hole injectors.

They atomize the fuel charge FAR better than our 86' single hole injectors and they "bolt-in".

Most people are claiming at least 20-25% more mileage, better performance and less clogging than the earlier design.

I got an entire set of 8 out of a 95 Mercury 4.6 for $22.00 for the set and aims to install em' in the Spring.

Do some mo' research before you buy a $600.00+ intake that only delivers 5% improvements.

BTW IIRC the 86' had 165 hp and 280 ft/lbs of torque as is. Add them AFRs and that takes you to 380 ft/bs of torque with just a head change........no real mods, no computer change, no big expenses, no change to reliability......food for thought.

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