Setting Valve Spring Installed Height, More V10 Progress & Our Mk8s! - Ford V10 4V Ep. 9 

Loved the walk arounds, love the engine build. You two are very smart amazing kids. Years ago I built a corsair motor for a pipe buggy. Put Nissan Maxima port fuel injection on it with a escort throttle body, Chrysler turbo, gm 4.3 distributor. That was lots of fun. Keep up the great work and have fun!

Who went checking Craigslist for Lincoln's after this? Haha

Always loved the Mark viii platform. Awesome sleeper cars and you can find them for next to nothing. I have a teksid block out of one of these cars waiting to get built. Picked it up for $30 because some one didnt know what they had. You guys keep up the good work. Can't wait to hear that v10 fire up!

Heroic work! Big into Mark 8 back in the day.. Amazing getting 27MPG on the highway back in 93! There was a bigger brother, the Navigator DOHC 5.4 which was a taller deck/Longer stroke block but only 8 cylinders. The V10 I believe took the Long Stroke 5.4 block and added two more cylinders which gave it 6.8L. That V10 balance shaft in the drivers side head is very wierd. The 5.4 heads/cams interchange with the 4.6 mark 8/Cobra mustang version. Ford learned the value of gasoline washing the backside of intake valves. The Modular DOHC heads used independent Primary and Secondary intake runners, but only the backside of the primary intake valve is washed w/gasoline. The secondary intake valve gets pretty dirty after 50K miles, the reason why the coyote went with a single intake runner (BIG) for both intake valves with a single injector hitting both valves.

Holy crap. That mark8 is so sick. I’ll bet That thing would be an amazing drift car. Long wheelbase is a plus. Great build on both cars.

You guys are schooling me on the DOHC modular. I've wondered about a Mark VIII with proper springs instead of air suspension; sort of an upscale Mustang. Keep the vids coming!

Mark 8s are great, cant beat that sound with full exhaust 👌

Nice lincoln !!! That luxury cobra

Its a shame this buildseries doesnt get more views, yeah the videoproduction could be a bit better but the knowledge conveyed in the videos and the whole build concept is just insane. Gotta love the yt algorithm

Never underestimate a man and his 3D printer

I cant wait to see where this channel is in a few years!

❤ the Mark VIII's! Always wanted one. Bucket list item I guess... wish I could be doing what you guys are now. Just stumbled upon your channel, I dig it boys! Can't wait to hear that v10 come to life for the 1st. Time... I have questions... Love the vehicle you chose to put it in as well! 💯 Great job and good luck! Waiting for the next episode to drop.

the shop must be freezing balls, glad you still decided to make the video.

I have had a mark viii for a daily for 6 years now still love it and will get another one when this one is done

I've only had three of them hope to get another one of these days. Would love to have had a manual swapped into them.

I have a 97 mark 8 with a tr3650 swapped in it! I like your guys marks they are sweet!

Had a Mark VIII and converted it to springs, loved that car. You guys bring Ford enthusiast to a whole new level!! I want that 4v 6.8l for my F-350

Nothing short of inspirational fellas 👏

Yall should make custom "40 valve" badges for various locations on the coil covers and on whatever vehicle you put this in! 😂

Please more videos!!!

Another great video, keep up the great work gents. Loving it

Oh and awesome videos every time. I am always blown away by the work you too do. Keep up the great work

These guys are amazing!

I just got myself a Quarterhorse as well!

very cool mark8s!!!

Great to see you ticking off the list 👍👍

It would be safer to just do a new valve seat job to move the valve seat face into the head or get crower to make a smaller install height valve spring instead of removing material from a surface that is protecting the head surface from the valve spring as it will not take much for the valve spring to destroy the head once the seal surface has busted due to fatigue this is a known problem on the aussie ford barra turbo 6cyl

I like the mark8 I like the mark7 a bit more. Both are sick Lux cars. I had a Lincoln LS that was nice too.

Love y'alls vids man... your (collective) aesthetic and performance ideas/styles are right up my alley... I'm just coming from the GM side! I have so many ideas akin to what y'all do, just have never finished any of them, props for acting and getting stuff done... maybe I'll be able to get one of my wacky projects done sooner or later.

I had a 97 cougar and a97 tbird I always wanted a Mark VIII. Supercoup manual pedals would work for your swap too.

great job guys,very cool v10 .i love me a mark 8 LINCOLN!!!!!!!!!!!!!!!!!!

You guys are awesome

Great content!

Love this platform I love my mn12

I'm super jealous of your diy bushings in the manual swapped mark 8. As the owner of a 1993 5.0 HO Thunderbird w/ 3:73s, my rear suspension is almost identical in layout. Do you have a video on how to make the suspension and subframe bushing molds or could you possibly sell the molds. I'd definitely be interested as I have spent a small fortune on getting every bushing for the rear in poly except for the subframe and the rear diff mount.

AAHHHH YOU SULTS! YOU FINALLY SHOWED THE MARK VIII!!!!!!! YAS!!!!

So the real question, which MK8 is getting the V10? or is there another MK8 coming haha

I am very interested in seeing a video on how you made the bushings for your Mark VIII. Also, the Explorer stubs for a 31 spline upgrade is brilliant. Never would have thought of that. They are identical left and right, correct?

Grafting heads together by welding them around is a terrible idea. The heads will crack in a very short time because they carry huge stresses, and their main reinforcement is the connection between the water-oil channels and the pins. In your project there is unwelded. The heads will crack quickly and worse, you will probably damage the block. Each head bolt presses it against the block with a force of about 120 tons. You have a joint there on these very screws, which will cause them to be pushed apart when the screws are tightened - like a wedge in wood. The material adhering to the weld will be thermally worked out very quickly and will crack because it is heterogeneous. You can weld the camshafts, they will work. Camshaft supports too, but it won't work with the heads. It would be faster and safer to make a new cad design by scanning these heads with a laser and producing them from a single piece of aluminum. In a moment, you'll run into the cost of machining these welded heads anyway, it's a waste of money. In addition, you did not take into account that the longer the head, the greater the tendency to expand along the length, and the engine block is cast iron. These materials have different thermal expansion. Simply in the world sooner or later such a welded head will turn out of banana. There is an engine called VenturiMotori VMsystem, it has separate (from 4 to 6) heads for each cylinder and each of them is screwed on washers. Each head on this engine is self-contained. It has a separate oil artery and a separate water artery. These are heads on pushrods with a camshaft in the engine block. In the form in which you presented it, the correct operation of this engine is impossible. Really, I advise you well, make new homogeneous heads, do not play with grafting two heads into one using a welding machine. It really won't work the way you imagined it to.

You need more views

The Coyote has the same bore spacing as the 4.6/5.4. I wonder if those heads would work?

I am also using the mt82 for my V10. Did you use any sort of slip joint or was it fine because the car is IRS? I have been thinking of using a guibo fitting on my diff to hopefully ease any shock loads on the gear box and diff.

Aye yo dnag i want a Mark Viii

Can't wait till you guys take the quad valved V10 back to the machine shops that said it couldn't be done....make sure you show their faces from the time you walk in the door to when they actually see it running with the hood open ....of course... maybe have one of your friends they don't know go in so they have no idea whats in store when they come outside .....lol

Bro I literally have an MT-82 swapped crown vic!!

I'm very curious about that tensioner modification, is there a write up about what it does ect? I'm only aware of the backwards secondary tensioner

You should have used Thunderbird SC pedals it would have been much easier with absolutely no it would have been boat and proposition

those mark 8's can be bought cheap! my dad loved that car and had 3 of them cause he could pick them up for a few grand. not sure what they go for now, but they get no respect.

What are you going to put the V10 into?

What trans you guys gonna run ?

Where you located in Michigan

I really wish people would stop using polyurethane bushings. They are just a gel and they cold flow and squeak. To switch to manual on a Mark VIII just use a Thunderbird SC setup and hydraulic cylinder for the clutch. For me it's delrin/aluminum bushings or rubber, no poly ever.

It needs a two step check out my 351w f150 or foxbody 2 step on my channel it’s a blast lol

Delete that third cat!! You’d be surprised in the output gained!

It's a shame you keep saying you need to add to the spring height. You actually need a thinner shim to increase installed height. You seem to be good with the lathe, why didn't you just cut down the ones you had? Then you wouldn't be so concerned about financially recovering from this😂😂😂