5.4L AUSSIE BOSS 290 INTAKE TEST

[@GlennEverittMasterofMachines]

I had a dyno shop here in Aus for 25 years (got out in 09) and we specialised in the Boss 4V engines along with the Turbo Barra and the GM LS engines. Our primary R&D car for Ford was an FPV 290 Ute. With only bolt-ons, tuning, etc, and a well set up car running the factory 4spd auto trans (4500 stall with a Heavy Duty lock-up clutch), at 3700 pounds race weight we ran an 11.6 @ 116.9mph. Completely stock internals (unopened) and Naturally Aspirated. Working with our chosen cylinder head guy, Dave Webb of AFD (Airflow Dynamics), we both thought the intake runners were a bit on the large side for the stock engine, so we reduced the crossectional area throughout by approx 20%. The result was interesting, and we lost no power anywhere whatsoever, right up to the 6700rpm limit we had set, and we made a little gain between 3500 to 4500rpm but only about 3 - 5hp. We never got to try a further reduction but a have a feeling it would have been beneficial on this engine to pull some much-needed power under the curve without sacrificing too much upstairs if anything at all. Another interesting point was that I visited the foundry that cast the prototype and spotted the same manifold in his office on display, and to my surprise, he told me that there was only ever this one prototype/size and configuration created and tested.

[@BRob1320]

I'm in Manor, if you have any parts left or at all for a 2v or feel like tinkering with a 5.4 2v Pi engine or if you ever wanted to play with the Coyote. I have a 2nd gen ready to be built. 🙂

[@fascistpedant758]

Your adjustable intake is cooler than a tunnel ram. Have you ever compared different runner diameters?

[@richardholdener1727]

not on the mod motor

[@jaydnisevil]

FG Barra Turbo next mate, love your stuff.

[@CallofDoobie585]

No barra in the states. Send us some!! Lol

[@MafiaboysWorld]

@@CallofDoobie585 There's already plenty there, just find Adam LZ. 😉

[@jimmyalvarado3109]

Yep Barra good pick.

[@Brock_Landers]

PLEASE send us some Red Top Barras!

[@Brock_Landers]

@@MafiaboysWorld Adam's 350GT is BADASS!

[@elonmask50]

We don’t “get” some of the coolest stuff, we “designed” it, we may well ride Kangaroos to work, but we make lots of cool things when we get there, just curious if we didn’t also change our 4V heads as well, fabulous video as usual Richard, luv your work.

[@richardholdener1727]

I think I demonstrated my love and respect for the Australian hot rodders-if you think I indicated anything else-that's on you!

[@elonmask50]

Richard Holdener, indeed, and I certainly wasn’t having a go at you, I love the fact that you go to the trouble of even testing our aluminium bits at all, unfortunately most Muricans, think that we get all our go fast bits from the US, most still believe that the Barra is just an old 250 motor from an F150 with a touch of new paint. Our now dead car industry turned out some wonderful things in their go fast departments, look what GMH did with that old 3.8 Buick stinker they ran in the Commodore for years, unfortunately they forget how to make daily drivers that people wanted to buy, again, luv your videos, I have learned so much from them, and even this episode about RPM, I was always told that RPM was limited by conrod speed in Metres per second, regards Mike.

[@Flitzer514]

@@elonmask50 I thought the big thing in Australia was to modify Toyota 1UZ motors or Nissan VK motors?

[@GlennEverittMasterofMachines]

Kermit Stanbach , far from it. Most of our high performance market here in Aus is based around the LS, the Barra Six turbo, the 5.4 Ford and Coyote V8 and a whole range of other stuff, including old school Ford, Chrysler, GM Holden and Japanese performance like Rotaries, Fast Fours and Sixes, etc.

[@elonmask50]

Kermit Stanbach, absolutely, we Mad Max the shit out em!

[@mrbrad4637]

I've had a BOSS 290 in my FG XR8.. but I crashed it unfortunately 🥺😫... I currently have a 2008 BFII XR8 with only 55,000km in the clock with the BOSS 260 and I love it 🤤🤤😍

[@jonschmidt176]

im running a boss 290 intake manifold on my twin turbo 5.4 4v. I cut and relocated the throttle body to the front. running a LS 90mm throttle body on a holley stand alone setup. Its a great intake setup for sure. I thought about switching to mmr billet coyote intake manifold with adaptors.

[@brentmeredith5295]

Richard the the boss 315 engine on the series one fg falcon GT had a twin blade throttle body from factory if you are looking for one . In Australia you could get the 5.4 in 260,290,302 and 315 kw

[@dataminetk]

Yella Terra also do an aftermarket upper plenum for the BOSS manifold adding a twin 60mm TB. It also adds a bit extra plenum volume and fixes some cylinder to cylinder fill mismatches the factory plenum lids have. In the aussie location the TB is on the left side of the car (as you look at it, passenger side for us, drivers side for the US) meaning teh rear cylinder on that side has the least air flow. some people have also tried the front TB input (used as an OTR style from a intercooler), and twin TB's one on each side (seen done for both n/a and twin turbo setups).

[@michaelboyd2708]

Dataminetk I was goin to say the same, you can also by a spacer to lift the top up 10mm to also help cylinder to cylinder air flow.

[@olazy9525]

All the boss motors in aus have these intakes. alot of us put a forward facing intake plenum with twin throttle bodies on it. seems to work the best :) loved your video mate.

[@TomMarquis66]

Richard I have a Shaun Hyland aluminum 6.0l block with a ford 5.4 racing crank (5.8l total),running a Boss 290 intake with a custom upper 1000cfm oval throttle body. It also has custom cams and long tube tri y headers. The chassis dyno indicated 580 hp and similar torque at the flywheel. I think a greater plenum volume might help and would like to see what a 1 in space would do. I also like your twin inlet idea. Btw there is an Aussie company that makes a front inlet upper. There is also an individual throttle body intake. I would live to see that dyno'd!!!

[@chucksgarage7165]

So.... I think Richard's homemade intake was the best of them all? Wow!

[@deanstevenson6527]

Chuck's Truck : It was. The 16 version of Richards made the most power with the least revs: 449 hp at just 6100rpm. I was taught to look only at the rpms required to make peak power, which is called the Hilth Method of data assement. Generally, most bench racers and dynomometer operators understand that carrying another 200 rpm to make another 15 hp is fine, but another 200 rpm extra to make only 2 hp more is not an efficiency win. The trends are more important than the peaks. The power peak Richard made on the second longest of his custom intakes made that 449 hp from a 330 cube engine at just 6100rpm. Not carrying extra revs means VE and BMEP have improved, but Ai is a real quick sanity check. If you take engine cubes, multiply it by the peak power rpm, and divide by indicated gross dyno horsepower, you get a number, 4484 in the 16 runner test case. That is an Aspirations Index (Ai) as defined by two Australians, the late F1 engineer Phil Irving and the still alive touring car engineering guru, Larry Perkins. Richards second longest Rube Runner gives the lowwst Ai of 4484. Revs are traded off against Horsepower. Lowest number Ai constant wins. Always. Mr Holdeners Second Longest 16 inch 'Sub' twin throttle body beast "wins" by that statistical rule.The SMH was 2nd. Boss 290 equal by a narrow margin, about 4714 each. 330 x 6300/ 448 hp for the Boss 290. For those worried about mid range torque losses, Variable valve timing can control that.

[@DrinkinDaJuice]

You are incorrect when you state that "Variable valve timing can control that." as the 5.4L DOHC modular V8 has absolutely no variable valve timing, nor have any models of the Modular DOHC 5.4 ever had that feature. It is not something that can be added into the engine either, obviously.

[@justinwright6611]

It’s becoming much more of an international dyno channel. Which is great.

[@denisohbrien]

I have an example of piston speed limit... I run a rover 1.4l K-series (an engine found in the MK1 lotus elise but probably completely unknown in the USA) at 8000rpm I could run the engine all day every day. When racing, due to gearing I used to run it to 8400rpm so I didnt have to change to 5th. after aprx 5 passes (1/4 mile) it would push the gudgeon pin out into the cylinder wall, it would run fine but obv itd burn oil fur fun. yes technically its a conrod issue(press fit pin) but was directly related to piston speed. The reason I cite this example, is the pistons jsut a slug, I suppose so long as it doesnt seperate into two it has no reall limit, the limits always whats around it, rods, pin, rings etc.

[@beardbuilds5140]

Denis O'brien you would have had bores that looked pregnant! “Slightly” larger in the middle if you know what I mean!

[@Jubr123]

You can lower piston *Acceleration* with longer con rod and lower height piston (higher rod ratio), which is also improving the crank angles which reduces wear and force from the cylinder wall, and makes the same displacement engine to be able to rev higher without exploding it, and in some cases even gives you lighter rotating assembly, and also makes the compression stroke just a slightly “longer” like an half degree or so but anyways it theoretically helps with detonation issue 😁😅 So there is much “pros” in longer rods. 😁

[@denisohbrien]

@@beardbuilds5140 if you could post pictures in youtue comments id show you, yes driving 300 miles home from an event with the gudgeon pin riding the cylinder wall left an impression (but she always made it home) the pin was very wide, so even when it was contacting the wall on one side, it was still in the piston on the other, there was a slight little end knock but the tell-tale was the horrific oil consumption on that cylinder.

[@denisohbrien]

@@Jubr123 Id love to see richard actually test this, ive no knowledge of "domestic" v8's cause in the UK they just dont exist in decent numbers, but off the top of my head the subaru EJ25 and the nissan RB26 are both engines I know intimately and they both rev hard and both have very short rods. Now the EJ is famous for piston slap but id say thats more due to the tiny height slipper style pistons than the short rod. I agree from an engineering point of view, but interesting how it plays out in the real world.

[@anthonysgarage]

I know this is an old video, but I recently started following this Aussie fella "Gap Sauce". You're spot on with the Boss 290. I guess there's company called Yella Terra that makes a high flow upper plenum. He used the Yella Terra upper plenum with a GT500 twin 60MM throttle body. Seems to work really well.

[@sykcnt8012]

kzbin.info/www/bejne/nmrLhZehj92IbZI GAP SAUCE LINK, HE IS A 5.4 LEGEND!

[@mcjoneszin]

Do some testing on the Ford V10.. need to see one in a Mustang..

[@scottsigmon926]

Once again, looks like those guys at Ford knows how to design a intake manifold for the 4v engines!!!! For the money, can’t beat that stock intake and my choice if I had unlimited money, would definitely be the boss!!! Or maybe Richard’s custom made intake!!!!

[@markgregory1481]

Please do Coyote intake tests with the available adapters for comparison

[@bradpittman5075]

Would have been cool if during the weird ford years where they made a million different v8s if they just made the 5.4 for that time period. I am glad that they’re basically making coyotes now instead of two valve coyote three valve coyote and four valve coyote. Glad they just make coyote.

[@bradpittman5075]

Speaking of f1. I would love to learn more about the air spring for the valve spring. That would be cool.

[@dinosshed]

They have a pneumatic bag in place of a valve spring to eliminate coil binding and valve float from oscillating.

[@johnmckamy6398]

Piston speed is considered more for the life of an engine than a restriction.

[@dmc5681]

Yeah it’s an endurance thing, all endurance motors keep to 25-27 mean piston speed.

[@overlord5066]

I've got 3 of these intakes in my garage. Funny how stuff so rare and desirable in one country is just excess car parts in garage in another. My little unmodified Boss 260 runs a Vortech V3 side mounted blower at a mere 6psi at the top end, and a water to air intercooler, sitting pretty with a nearly 480hp :)

[@modularpowered]

Still have one you'd be willing to sell? With stock fuel rails?

[@OGskunkMASTA]

They make a dual 65mm plenum upper for the 5.4 BOSS intake, pretty common too. Just pricey hahah

[@jimmyalvarado3109]

Great video, were I live in Australia, the Ford Barra turbo 6 cyclinder is one of the favourite at the minute. Have a look.

[@HazeyAuto]

Want a bigger throttle opening on a BOSS intake? Check out Yella Terra’s website. They offer a revised top half that accepts a twin blade (used on some Shelby cars I believe) or oval single blade TB. Furthermore, they offer a supercharger kit that lives in the valley and doesn’t add any size to the factory intake!

[@smithy2]

I tried to buy 1 of the yella terra hats but they didnt need my business, i bought a better front mount job, 120mm throttle 😉👍🏼

[@BuffMyRadius]

Check out the stock Navi TB at 4:33, any chance this is the twin blade that you speak of?

[@HazeyAuto]

Stuart Marshall bigger again. It’s a twin 65mm Ford Racing unit.

[@MafiaboysWorld]

Alright Richard, who's the Aussie who slipped you a 290 intake? 🤔 You gotta ask whoever your contact is down here for the BOSS 315 intake off the FPV before we swapped to the Miami motor. 😎👍

[@chucksgarage7165]

260 - 290 - 315 Intakes? What are the differences between them?

[@MafiaboysWorld]

@@chucksgarage7165 From what I'm reading off all the old Aussie forums...none. 😁👍 Not between the 260 & 290 anyway. All internal differences (different comp pistons, different cams, valves). Trying to find the 290 vs 315 comparo. 🤔

[@MafiaboysWorld]

@@chucksgarage7165 Okay, same lower intake on all 3...from what I'm reading though it maybe different on the upper on the 315. 👍

[@michaelgray8543]

This is partially correct..BOSS260 and BOSS290 Upper plenums are the same but...the BOSS315 is built to accept a larger throttle body. We also have an aftermarket fabricated plenum lid that accept a twin 65mm Wipple TB. There are also some that have been fabbed to accept a TB either side or directly in front. Look on Ebay and you will find one. I am selling a BRAND NEW from Ford Australia 260/290 manifold without upper plenum.

[@MafiaboysWorld]

@@michaelgray8543 Thanks Michael for that info. 👌 I couldn't find that last bit why the 315 upper was different. 👍

[@Prestiged_peck]

Day 2 of asking for a triton v10 other guys episode (2 AND 3 valve)

[@chucksgarage7165]

Yes. Triton V10.

[@Prestiged_peck]

@@chucksgarage7165 theoretically it should make 25% more power than a 5.4 with the same bore and stroke but 25% more cylinders. Sadly there won't be much of a manifold choice.

[@xdefboy]

Love the sound of a v10

[@Prestiged_peck]

@@xdefboy who doesn't though

[@robsearles3875]

If you want a bigger throttle body opening for the boss 260/290 upper plenium find a boss 315 plenium from a fg 5.4 gt. They have a twin 60mm throttle body. Or u can buy aftermarket higher volume pleniums from aussie relatively cheap

[@stephenbell8337]

I have a 290 fg 2010 in Australia. It has 180000 klm. It requires regular servicing and tyres so far. Hehe 😋

[@danr9584]

Dorman should make a "replacement" manifold for the boss 290 like they do with the LS6.

[@jblack5323]

Hi rich. Can we get a video about your old Foxbody? With a timeline of when you bought it and all the mods you did.

[@danielthompson3849]

Yes but the f1 engines that reved to 20000rpm only had 42mm stroke with 90mm bore Needed the bigger bore to get bigger valves in so it would actually breath at that rpm

[@adambecker1604]

You should make a video comparing 4.6/5.4 intakes to the coyote intakes with the adapter plates for the earlier mod motors

[@MLFranklin]

The SuperRichie(TM) variable length manifold is sick. It would be cool to see that one with the injectors mounted up high on the runners to answer the charge cooling question.

[@richardholdener1727]

I did that too

[@marklowe7431]

The upper plenum on the Aus Boss manifold can be improved quite a bit with Yella Terra swap or modified for front entry dual throttle body. The front and dual throttle body mods have all been done before. You can buy them on ebay.

[@mchristr]

Jon Kaase was asked about the liabilities of his IHRA Mountain Motors. He said that although very undersquare, those engines got down the track pretty good. I guess.

[@Matthew330ba]

We need another of these with coyote intakes on it. I run a boss 260 in my falcon with a coyote boss 302 on it. Surprisingly I picked up quite a bit of torque

[@Bluterus]

Lol the 290 intake rare in Australia. I threw one in the scrap bin recently. Checkout the Yella Terra intake plenum for the boss 290 intake. It can take a monoblade or twin 65mm. The boss 315 came out standard with twin 65mm

[@coolguy112286]

I wish this could be done again with a coyote intake! A cobra jet on a 5.4 would be cool!

[@madmod]

Boss 302 vs Boss 290

[@MrJak427]

Don’t laugh but how about some shoot outs with the 3v 5.4 with VCT working ?? Australia also used that engine and had a unique cast alloy intake for it I find it a better engine in stock form ( with twin exhaust) compared to the boss260 down here more torque

[@marklowe7431]

Get yourself a Boss 260/290 lower plenum, Yella terra upper plenum and a factory twin 60mm Ford and you have the ultimate.

[@ldnwholesale8552]

Longer the stroke the better torque and the less rpm needed. This for a production engine. 302, 327 350 Chev 302 351W 340 360 LA 351 400M. The 5.4 here in Oz has very little available simply to overhaul, or at least a few years ago. Huge heavy lump. And overshadowed by the 4 litre turbo 6.

[@MsKatjie]

Please correct me if I am wrong. They run less than a 4 " bore. To me, that is less piston surface area and increased valve shrouding and less low rpm torque? I wonder if the reason was to control detonation? They are known for timing chain adjuster o ring blow out, leading to dire problems for the valve train. The 3V 5.4 at 80 mph, in a 35 mph{ 110'} cross wind and air con on full; delivered 24.5 mpg. An imperial gallon is 4.5 liters. I thought that was great going. Cheers.

[@CosmosMBTS]

I am glad you spoke about pistons speed. There is still a lot of theory out there that just does not hold water when actually tested physically, but people still tell people you can't do something because of the theories. You bring a lot of important information to the community with your physical testing. Thanks again.👍

[@eaglewindspirit]

Make a variable sliding intake that can be manually shortened as the RPM goes up, it would be revolutionary. Then design a servo system with controller to auto vary the length using RPM and throttle input. Maybe can be integrated into ECU, maybe Holly would work with you to design it.

[@HPRaceDevelopment]

Bullshit on piston speed. The mechanical limit of rpm for endurance engines is piston speed.

[@fastmonaro05]

Good to see. Aussie Boss; Quad cam 4.6ltr heads, 5.4 Ltr block. Was a good engine.

[@richardgutteridge2127]

You can get them in Australia they are not that popular because everyone does the 6 cylinder barra motor because they are cheap, tough and can handle a lot of boost.

[@vr6swp]

German tuners try to put short cranks in everything. You can't tell them piston speed isnt the limiting factor.

[@AndyFromm]

Ford love ❤

[@lordhumungous7908]

I think the Boss 290 and the much more common Boss 260 intake manifolds are the same.

[@anotherfishguy1051]

You did all the dyno work for ford mag back in the day .seen alot of pics out of the mag in the videos .this engine did a 1000 way back then on twins .back then that was amazing .

[@travisabrahamson5092]

One day I hope to see couple junkyard hy35w Cummins turbos on the 4.8 or 5.3 . Interested to see how the internal wastegates workout.

[@ProjectFairmont]

Interesting. A 5.4 has a higher piston speed than my 521 (8.5L) BBF. I have played around with a 5.4 Lightning motor. A couple of nice things about these engines is the stout bottom end assembly and the very stable “small bore” piston. 4V heads, small bore and long stroke can be an excellent combo.

[@alexcorona]

The Australians got all the nice stuff. Wish we got the cross flow six heads and the Barra.

[@jmitchell513]

I know this is an older test but it'd be nice to see different coyote intakes ran on a Navi motor with the MMR adapter plates.. Especially since you mentioned the last test adapter plates hurt power.

[@erwinnijs1]

Piston speed affects engine life. That's why OE manufacturers have a self imposed limit on it. It is of no consequence to hot rodders, so long as the rods don't break.

[@Elver_Galarga_jugo]

It may be ugly but damn does that intake work. May need to make me one and make a "Y" cold air intake

[@andrewcreed8534]

Tip from down Under with the boss 260/290 intake get the Yella terra duel throttle body and use a spacer inbetween the upper and lower plenum

[@adampayne235]

mentioned navi intake should be dual runner. but it does have a runner control.

[@hudsondonnell444]

Be your own BOSS. I'd like to see a larger front throttle body on the front.

[@jarebear58477]

Fix that squeaky ass desk every time you shake move your hands or body it squeaks.

[@goldar4846]

Richard, it would be worth measuring the restriction that the throttle body causes. You may find that increasing the plenum size gives a bigger gain than increasing throttle body size.

[@stevenstrawn5009]

Just an ugly motor maybee it performs just looks like crap

[@BuffMyRadius]

Thank you very much for testing this engine, it's a true junkyard gem! One question for you though, was the Navi intake run with the crossover open or closed? I've also run across a rumor that the supercharger from the Mercedes AMG M113k 5.4L can be mounted on the Ford 5.4 with a spacer. If anyone has any information on that I'd love to hear it.

[@ivancolesnic]

Where can I buy the Super Richie? Looks legit.

[@JosePerez-ki5zv]

How about 5.4 3v intake manifolds

[@guymarkshteinfeld673]

The bf falcon 290 comes with tiwn throttle and custom front feed

[@gtempo4673]

Hey mate ,I know I'm late to the show here but I have a 5.4 2v expedition in the philippines, I wanted to know if the boss intakes would bolt on or any of boss part can be used on the 2v engine at all? Would love to suit up my truck with stuff from home.

[@richardholdener1727]

it won't work on a 2V

[@mclongkock6678]

Late 5.4 fg falcon have different throttle body to that one. Im pretty sure the boss 290 have 90mm single throttle body. You have have the xr8 260 boss manifold which have the smaller throttle body then the real boss 290.

[@richardholdener1727]

thnx

[@timothybayliss6680]

It's not piston speed but piston acceleration that limits rpm. Once the rings start to flutter and break the seal your goose is cooked. This will limit you every time and goes up with the square of engine speed. This engine with its 4.165 stroke even at 7000rpm is maybe pulling 1500gs peak. A formula one engine will have over 4300gs peak with a lower mean and peak piston speed. Youre not measuring the important part.

[@richardholdener1727]

I understand the acceleration part very well since it has to stop and start-I didn't want to go into it that deeply-most use mean speed

[@CedricSimmons-s5k]

Hello and good evening i wish somebody made 4.6 to 5.4 intake adapters and do some test on the 5.4 2v

[@richardholdener1727]

most go Coyote intakes with adapters on the 5.4L

[@bobqzzi]

I would absolutely choose the Super Richie- by far the best intake in the test.

[@abaracskai]

BMW motors have a larger stroke and long rods and a few of their motors revved to 8000rpm from the factory.

[@akaitv6606]

Aussie Muscle ,can't beat it.How come you Yankees use 91 octane ,In Australia we can easily pick up 91 94 95 98 E85 At any local Gas station

[@richardholdener1727]

California only has 91-its higher elsewhere

[@911bowhunter]

Got a question if you can help please got a lq9 and thinking of putting 706 heads on it is this a good idea and will it bolt right on without issues being that it’s a lq9 2003

[@richardholdener1727]

compression will be high

[@supermotojunkies1211]

The fg falcon was a 315 boss and had a twin 60mm throttle body also you can get a front entry throttle body plenum

[@1jzae86]

Where can you find the front entry besides ebay.

[@smithy2]

The boss plemum was on backward, but as i have the boss260 (same manifold) this was the best episode yet 👍🏼 Question did you use the same fuel rail for all the manifolds? Being aussie buying yanky parts is a nightmare Taken the advice of bigger throttle body on the front

[@ZedTee77]

Yeah haha I was wondering if he had it backwards or the photo is mirror imaged. I’ve noticed a few photos show up mirror imaged.

[@smithy2]

@@ZedTee77 i commented then realised the manifold was backward, so technically the lids right, but na its backward the throttle should be the same side as the 710 cap, he's not using an alternator which would be the only problem

[@richardholdener1727]

different rails for each

[@smithy2]

@@richardholdener1727 oh ok, ive just been hunting for a pair for my boss manifold is why i ask

[@luciankristov6436]

I bought a 290 off ebay here in America. Absolutely badass intake. Paid 500$ for mine. Also rpm on these engines arent limited to the valve train, its the terminal piston speed due to the long stroke of the 5.4. The piston becomes unstable, and the skirt starts smacking the walls with some brutal force.

[@riccocool]

Is the 4.6 or 4.6 stroker to 5.0 better than a 5.4?

[@1jzae86]

Hey did you test the boss 302 intake swap by chance really would like to see the difference between boss290.

[@richardholdener1727]

only had the 290

[@thinkingmanhillbilly]

Have you ever tested a Ford 4.2 V6 I think it is the 12 port, I have one in my 98 E150 van.

[@richardholdener1727]

I HAVE NOT

[@mattstone881]

hello Mr. holdener! very nice to get to speak to you. so I'm new to the 5.4 4v motor. i have put one in my mustang. i am trying to find a good intake. i have been thinking on a voloicty coyote intake. could u pls tell me if it is a good or bad idea? i need to get the most out of the motor in the bottom end and med rang. I'm worried I want get the full power of my motor until I'm out of rpm....???? do u no anything about the intake I'm asked me about? the motor is stock other than a set of stage 2 I think may be stage 3 turbo cams.

[@richardholdener1727]

I've never tried running a Coyote intake with adapters on a 5.4L, but the intake itself works very well

[@mattstone881]

@@richardholdener1727 well I really could use some pointers on my 5.4 4v motor. one is what is a good rpm to shift at? also I no that if I go say 5000 and shift that extra rpm is throwed in there over it being a manual so I would actually be revving the engine around 5500 RPMs give or take. l am looking for about 400 to 500 on just motor. that's what I'm after. let me send a pic to u of what I've done got for the motor in building.

[@JosephCowen-fz8vj]

The Boss 260 and 290 were not the top of the line set up they were mid range , top end aussie 5.4 s had 307 and 325 kw ( the boss 260 and 290 are kw ratings ) so the 325 has 470 hp from factory ford ! And rare , please thousands of them in aussie wrecking yards, get a whole running Boss 290 and T56 six speed for about $3500 Australian or $2300 US .

[@richardholdener1727]

Very rare in the US

[@JosephCowen-fz8vj]

@@richardholdener1727 just a E bay payment away , they were everywhere in Oz !

[@9thgatedim273]

Do they have a carb intake kit for a 5.4 looking to swap one in my 56 ford fairlane

[@richardholdener1727]

sullivan does

[@fatherfirefighter7751]

Where are the 96-98 B head cobra intake videos?

[@richardholdener1727]

not up yet

[@fatherfirefighter7751]

@@richardholdener1727 Super excited to see it, I've always wondered!

[@NightWrencher]

Awustawwlia not australia

[@MustangCrazyMan72]

I have the Sullivan for my TT build

[@jcaj9002]

I think you can use Coyote intake on the 5.4

[@Spad68]

That would be interesting

[@jreydelacruz]

Boss 302 roadrunner manifold has adapter plates available.

[@michaelgray8543]

Yes. You can. I have a test comming up with one but it requires the use of MMR adapter plates.

[@baileyharding2211]

Aussie here, boss 290’s love high rpm with the things we do to them haha

[@richardholdener1727]

they are cool

[@OgamiItto70]

It may not be a good idea to pooh-pooh the idea that piston speed is a limiting factor when comparing pieces CNC'ed from billets of pure unobtanium, like Formula One engines, to average, sun-of-the-mill powerplants from Interstate luxo-barges designed to amble down superslabs at 1,250 RPM. How often do these "mountain motors" and Formula One mills get rebuilt? After each meet? Between races? What is the rejection rate on their reciprocating parts? What does John Kaase build his uncalculated-piston-speed engines for? Tractor pulls? Drag races? Or 24-hour endurance racing? The Baja 1,000? It seems like there's some pieces of the puzzle missing. That Sullivan, though! Even though it loses torque down low against the "stock" engine, those long, flat torque curves are what I like to see! Pretty good for a V8. Here's a question: What about runner length versus plenum volume? I've lost my copy of _The Scientific Design of Intake and Exhaust Systems._ What's the relationship?

[@richardholdener1727]

plenum volume has much less effect-watch the Kegalodon video

[@OgamiItto70]

@@richardholdener1727 Okay, been there, done that. That was interesting. I wonder if plenum volume is less critical on 90° "crossplane-crank" V8's because of the uneven firing order. Similar to how their torque curves are less influenced by exhaust primary tube length when compared to 180°-cranked V8's or inline 4's. Designers, mechanics and researchers talk about notable differences in torque curves of inline 4 motorcycle engines based on plenum volume. (I haven't seen the curves myself, though.) Or maybe the smaller the engine, the greater the effect. I've got some thinking to do...

[@brad3139]

Love these mod motor tests

[@chriswilkinson9581]

Just bought a boss 260 BA XR8. Stock makes a good sound. I think a dual throttle either side of the boss manifold would be best for air to each bank of cross flow manifold. Might look at fab shop for new ideas...

[@BigRick-uq8lc]

Richard do you think I could get away with 11.0:1 compression on a 5.4 Navigator motor on 93 pump gas. With the similar build as this one.

[@richardholdener1727]

YES-WITH NO BOOST

[@BigRick-uq8lc]

@@richardholdener1727 thanks

[@chefdan87]

The dual plenum adjustable intake looks like it was hobbled together from galvanized fence posts and other random stuff from around the garage.... Lol

[@themustangbrothers]

I have a 5.4 2v lightning motor swap. Have zero deck height piston from weisco. K1 rods, tfs heads and a gt500 blower adapted to it. Running 10.4:1 and stage 3 crower cams. I hope to put 650 to 750 to the ground. Its running about 21 lbs of boost

[@DBSSTEELER]

SuperRitchie FTW!

[@mickholgate3347]

Aussie here, love my Boss 290 with same manifold and plenum!

[@Parents_of_Twins]

The guys are Power Driven Diesel turned a 6.7 Cummins up to just over 8k. Of course at that point all sorts of stuff let loose. Can't remember the exact numbers but they did a calculation on how much force was on each rod bolt and it was something like 34k pounds. The reason this all happened is because the throttle stuck open and the piece that suppose to slam closed and kill all air to the engine malfunctioned so the driver had to put the truck in neutral and let her spin. That might be an example of piston speed being a limiting factor.

[@Parents_of_Twins]

kzbin.info/www/bejne/maDCknuXo75ke80

[@Parents_of_Twins]

According my calculator the piston speed was circa 112 ft/s or 34.1 M/s or 6710 ft/min on that engine when it let loose. That's a 4.88 stroke at 8250 rpm which is pretty close if I remember correctly to where the engine let loose. Fairly impressive really because wouldn't the rods and pistons from a 6.7 Cummins be heavier than those for say a 632 Chevy? This all happened a couple years ago so I might have some of the numbers a little off. I shared the video of it happening here. If you want to know the exact numbers they have a follow video where the walk through all the damage and the numbers.

[@barrywilky535]

That 290 is cool. I think the navigator intake is going to work best for a daily driver. I'm putting one of these motors in a 2000 f150 single cab stepside.

[@kylemilligan752]

I'm with Mr Holdener. I turned an all motor D16 honda 9500rpm over and over. It did wear out rings. New rings, and output would come back to the baseline. 3.54 stroke

[@knowbull5hit590]

Hey i think you were a little off about the cobra-R intake being the best factory DOHC 5.4 intake... surely you meant the fancy belt driven intakes found on the GT500 5.4 engines 😉 lol

[@salgreco3988]

As always Well done!

[@johnhazel9986]

Yes! Home made IR fuel injection. 'So cool. BTW what were the cam specs? When you are specifying runner length, is that valve-to-entry?