Slant Six Supercharged! 1971 Plymouth Duster At Mopars in the park!

In today’s video we feature a bad ass 1971 Plymouth duster, that has a built slant six with a supercharger that makes over 600 hp and 550 foot pounds of torque. Steve Nitti has owned this car since new. One owner. It quarter miles in 10.50 seconds at 121 mphs.
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#Mopar #1971PlymouthDuster #Dustersupercharged

[@Riverdeepnwide]

Steve, beautiful concept and work with a great personal storey behind it. Nice! 👍🏻

[@BoostedDilly]

I definitely agree!

[@xmo552]

@@BoostedDilly I know these are older wheels, could you tell me what they are?

[@user-fl2ei2bz2c]

A ten second slant six? Much respect!. Nice!Incredible job done in that car.

[@toddcooper2563]

I'm 59 years old and I have been a MOPAR fanatic since I was a teenager. The nicest MOPAR that I've owned was a '69 Dart GT 340 with a 904 tranny and it was sweet, but I was a Slant Six enthusiast back when it wasn't cool. Years ago I read an article in Hot Rod Magazine and a German engineer was asked what he thought was the best engine ever built, and his response was the Chrysler Slant Six! Let's face it folks, that engine is just about bullet proof. The featured Duster is a sharp car, but the '66 Baracuda Fastback really got my attention!

[@billjamison2877]

In my opinion, for what it's worth, the Slant MoPar Six is probably the most "bulletproof" engine ever produced! You just Can't kill it!!!!!! MoPar or no car

[@BoostedDilly]

You definitely can’t kill a slant!

[@JxH]

Not quite. I had a 1972 Dodge Dart with a 225 Slant Six, and when it came to me it was already burning oil very badly. I had the engine replaced by a local repair shop with a Sears catalog rebuilt long block. After that, and with perhaps more regular oil changes under my care, it was reliable. The rear axles were not, as I kept breaking them over and over again.

[@HEMIPOWER604]

I only ever had the 1 225 in a 67vc valiant wagon, it had been to the moon and back and still it drove beautifully. Then I gave it to my clown mate,.....

[@trillrifaxegrindor4411]

usually because they cant get out of their own way,highly overrated other than in this case...this car is incredible but 99% of slants are hot garbage

[@davidgwin4540]

I bought a 69 dart back in 2006 for $900 American bucks with a slant 6. Ran on 5 cylinders but it was somehow dependable-ish. Long story short I took a gamble taking it to Mexico from California for an entire weekend! I depended on my Mopar pride and it didn't let me down with a burnt valve. But to be honest I do feel stupid for doing that. Girlfriend at the time just bought a new civic and didn't want to risk theft in Mexico on that new Honda I guess. So we risked it in a half ass car I bought 2 weeks earlier that ran on 5 out of 6 cyl

[@MrTheHillfolk]

Big fan of going a different route to go fast than the typical obvious v8s. Well done.

[@ditzydoo4378]

You sir are my hero... I have a big soft spot in my heart for the mighty leaning tower of power 225 Slant-Six... The 70 Challanger I drove has a factory stock 225 and would get over 30 mph, and still smoke the Goodyear wrapped Cragars with ease.

[@BoostedDilly]

A 70 challenger with a slant would be killer! Don’t think I’ve ever seen one

[@Trapper50cal]

I CAN NOT BELIEVE that he squeezed 600 out of that...that's an accomplishment, as is running 10.5's.

[@roadskare63]

I had a 71 225...nana's car....i could only afford to prop in a 2bbl carb...it faked a lotta cars out after i painted it black cherry black, but always ran out of top end ....but i loved her...will always miss her too...KUDOS on the custom build man!!

[@ChefLaRue]

Great video! Love that someone took the slant 6 to it’s capacity. Well done.

[@IRONHEAD12701]

Always loved the slant 6. Great little engine.

[@BoostedDilly]

Definitely

[@markusa5521]

That's rare like the charger I've only seen one with a slant 6 it was like a 70 or 71

[@IRONHEAD12701]

Guy in Long Island had a Dart with a worked up 225. Stroked, bored, big cam, 3-2-1 headers, holley 4bbl. Little 2 door was a straight line sleeper. In ‘85, during a show strength, he walked a brand new vette. Fun times

[@davidgwin4540]

I'm Mopar guy through and through or what have you, iv never been a 6 cylinder fan but ours have the greatest potential of all in this Era! That was just our economy engine back then, don't get me started on the v8's👍 great car

[@v.e.7236]

Back in the '70s there were no "special" parts for the slant-six, you made whatever you had work or you made it in your garage. They were very torquey engines, however, my best quarter mile was a lowly 13:36 at just about 110MPH, w/ a four-speed tranny - traction was a big issue w/ the crappy tires of the day. Everyone would laugh at me when I'd get to the drag strip, but quickly stopped laughing when I beat them and their V8s w/ my completely balanced slant-six w/ its 4.125" stroke and hand-ported heads w/ 1.72 ratio roller-tip rockers. Lots of time spent w/ a die grinder, before final assembly. Loved the sound of that six banger w/ the "modified" stock manifolds and home-built headers connected to glass pack mufflers and exiting out the side, just in front of the rear tire. Sweet music to my teenage ears.

[@ww748]

Actually Clifford Performance (6=8) started selling performance parts for the slant six in 1969. Intakes, exhausts, cams etc. were all availably by the early 70s and their line continued to expand. I purchased my 198-powered ‘72 Duster in 1980, installed the dual long tube headers and a two-barrel intake manifold with “big” Holley, mild cam, flexible fan and early efi ignition. No idea how much power it added but it was a lot more fun to drive. Also, Mopar Performance had some hipo parts starting in the ‘60s, I remember the HyperPac intake, cam and maybe more, but Clifford had a bigger selection of parts and was cheaper when I was looking. The video car is of course stellar. And BTW, using Wallace’s ET calculator the ET and mph quoted in the video are right in line with 600 hp. Regardless of the actual hp, I’m sure it’s a blast to drive at the strip!

[@1cleandude]

These were awesome engines straight from the factory!!

[@tadinator1362]

Great to see the inline sixes getting some attention.

[@richardowen4558]

OUTSTANDING WORK! I tried to get my younger brother to get the slant six Duster just after I bought my Duster 340. I am glad you went with the supercharger over a turbocharger. Much better reaction. Fantastic 1/4 mile time!

[@dragshoe9339]

A ten second slant six? Much respect!

[@BoostedDilly]

Definitely!

[@daviddavid5880]

Pardon my French, but.... That is dope af. That is just super duper cool.

[@GaryVonPein-zw4ty]

I’d love to see some more videos of this beast 😍

[@josephtuleya5296]

great story ! my first car was also a 71 slant 6 plymouth duster ; mine was a low budget model mine had the 198 slant six with the dreaded 3spd standard shift on the column ; i bought mine with money i made from a paper route ; it also had the bench seat which i cut a small notch in the center of the bench in order to put a hurst floor shift in ; it sure was a great handling car and comfortable to ride in ;;; my biggest complaint was the 3speed standard on the column that was always getting stuck between gears ;; i took it to the dealer to get it rebushed and it worked great for about a month and the trouble started all over again ;;; i was in high school dating at the time and i paid 400 dollars for it i miss and love that car but the frame rusted away ; i purchased the shark tooth grille for mine also ; really looked nice ;; good luck with your car it really looks nice !!!!

[@CarsandCats]

Fantastic job! That is the nicest /6 I have ever seen. Gonna be honest, I didn't believe the owner's hp/tq numbers until he said what it ran. The numbers are spot on.

[@BoostedDilly]

When I do a follow up I’ll include the dyno sheet

[@oldman7452]

Ran my 1974 "Gold Duster" 225 Slant 6 for 20 miles with zero oil pressure. 5 quarts later....drove home with a lifter tick. My uncle and I swapped it out in 6 hours the next weekend. I miss that car 😪.

[@BoostedDilly]

That’s crazy and awesome at the same time!

[@oldman7452]

@@BoostedDilly Hard to kill a Slant 6.

[@BoostedDilly]

Definitely is! I’m not new to Mopar, even though my content is on my Honda build. I have something special coming after I buy a house. That I can’t wait to start on my channel! We will be doing a follow up in the spring with this duster!

[@jimkoval4725]

I was at a car show years ago where they were doing an engine "blow". They drained coolant and oil from a Slant 6 in a old truck, then started it up. Damn thing ran for a friggin' hour. lol.

[@BoostedDilly]

That’s crazy

[@jonlennon3348]

I love this car,what a treat to even see it.

[@steveaustin7306]

My first car/apartment in 1980. Lots of memories. Wasn't like that though. Very cool

[@CJColvin]

Very beautiful build and beautiful Duster, I bet that Slant 6 can take a severe beating than any Ecoboost engine Ford makes with ease.

[@dorkwad100]

Just wow!

[@johnnaughton2364]

And proudly displaying the 225 decal!

[@robertsnyder5149]

Love your car and the leaning tower of power in it. 10-:56 is amazing and a very fast speed.

[@BoostedDilly]

Definitely is.

[@scrappyhustler7467]

My mother had a 67 plymouth barracuda and now my sister owns it but it's a trophy winner over 20 times best of show and still winning trophies and hearts alike every summer.

[@BoostedDilly]

That’s awesome!

[@zanestandlea8368]

Definition of Hot Rodding

[@BoostedDilly]

Definitely

[@masterwrench4252]

I bought my brothers 70 duster slant 6 auto, radio delete plate and "factory" add on underdash AC! I do was planning the big block swap. It had over 250K on it at the time. The reason I got it was he was trading it in and the dealer only offered him $300. I said (mind ya I had too many cars & bikes already) I'll give ya 500, right now! Did the deal on friday nite and on Saturday an acquaintance came over to look at a different car and falls in love with the duster. Who wouldn't? Body & paint were great, interior was good. Ran and drove ok. Dude! I gotta have it. Gave him a price to scare him off...$1500. "SOLD!" crap, should have gone higher. Well that's when things went south. Engine blew, he was pissed. I was a jerk for everything. All because I thought I could help my brother and my acquaintance...cars.

[@lukeiamyourfather3511]

My 70 340 Duster had the same gold paint.

[@arneminderman3770]

Beautyfull!!

[@hotchihuahua1546]

My slant 6 never let me down .

[@BoostedDilly]

A lot of people say that!

[@RudeMoparDude]

Great car with great story! 🤘🏼🔧

[@BoostedDilly]

Mose definitely!

[@fordssuck]

Thought I was Mr Badass when I bored my slant 6, put a Comp Cam in, Offy intake and Edelbrock 4bbl. Was beating up 5.0 Mustangs. But this is just the ultimate Slant Six hotrod

[@BoostedDilly]

His goal I believe is 9s with this one

[@markmark2080]

VERY nice, love the slant six and all those cars from my childhood.

[@clarenceghammjr1326]

Beautiful

[@clarenceghammjr1326]

Uncle Tony’s garage would love this

[@AtZero138]

Mopar A Bodies Forever!!

[@BoostedDilly]

Love the A body platform. I can’t wait to start building my duster

[@AtZero138]

@@BoostedDilly I have two in my life.. my ladies 68 model 270 still Slant6 and mine also Cali Built also model 270 now with 318.. well for the last 7 years it's been 318 powered.. cheers from Southern California Huntington Beach.. I drive my car everyday and Everywhere..

[@user-yv1fh3fc8y]

Very nice!

[@craigbush3951]

Nice Duster.....saw it at Carlisle this year

[@BoostedDilly]

That’s awesome! Thanks for watching!

[@d.s7741]

had a 1971 Plymouth Valiant and wanted to prepare it for the Minnesota Winter and put air shocks on the back and some Remington snow tires on it. That car "walked" through the snow of the 1991 Halloween Blizzard. The slant-six is a viscous engine.

[@BoostedDilly]

That’s awesome!

[@GrantOakes]

WAAAAAAAAAAAAAAY cool!

[@tntgators]

Love it

[@pauljones2031]

That is a very stout /6!

[@shorty808100]

You build a small block V8 right and put a pro charger on it, it’s gonna make way more than 900Hp *( I’ve seen twin/compound turbo Honda, Toyota and Mitsubishi 4 bangers making over 1500Whp and run in the 6’s at 260 mph in the 1/4 then there’s Toyota’s straight six well there’s 2 the 1Jz and the 2Jz you can make 2000+Whp with those and go fast as hell )* I had a N/A 350 back on 1989 that was making a little over 1000whp *( NHRA Dyno’d it once on a protest to find out if I really was running NoS or not they could simulate a 1/4 mile run with there dyno and get the time from it which matched my on track times )* , for IHRA tracks I had a 500HP NoS kit and 3 15lb bottles of NoS in my trunk at my disposal, I miss being able to build a cheap bracket car from a junkyard car/engine and rear end now it’s gotta be all tube chassis all aftermarket everything nothing you use to build you race car and I mean nothing can be from a car that had a vin stupid clean air act, or you gotta buy a factory drag car that will run 7.9 at 180mph in the 1/4 they range from $112-144k they don’t have a cheaper slower version like say a bone stock car with just one race seat an 8 point roll cage it could be say a 10 sec quarter car that you could buy for around $15-20k for the bracket racers that aren’t 1%ers on the income scale although I could build a nice funny car style Pro car for about $20k or less myself if I wanted to make it a pro stock or top sportsman about $30-35k dunno if I wanna do a car/truck or a dragster if I do a car/truck I wanna do something stupid like a pinto or a little chevy Luv pickup or maybe a Chevy Monza Spyder with a stroker 427 SBC should look nice between the frame rails and make tons of power N/A or supercharged, if I wanna run NoS I’ll have to change my pistons to 8-1 from the 15 or 16-1 ones I’ll be running with the blower

[@masonjarhillbilly]

The Leaning Tower of Power. Kudos for being different.

[@paulinaz9386]

in high school had a '70 Duster that was lemon twist yellow. 225, 3 on the tree that my dad bought new. wish l still had it!!

[@BoostedDilly]

Love lemon twist!

[@Ihitthings3]

That’s a sweet Duster! I concur with your final statement.

[@sdmoparmaninsd6713]

600 is a littttle optimistic considering the likely weight of the car and the trap speeds but still pretty neat none-the-less

[@jayjaynella4539]

Love the blue color of the Cuda. Melts my heart!

[@BoostedDilly]

Was a very beautiful color!

[@briandale8386]

I had a 76 nova with a 250. I hardly ever got beat out of the hole .

[@stevesloan6775]

That type of supercharger delivers the best drivability

[@jasonbennett9995]

Mopar mean old Plymouth's are rad God bless from Canada eh nice job brother I love it

[@donparker1823]

What a great story! I love this.

[@williamwarner3982]

That much power without an intercooler and running a hot air intake. Dayam

[@apismellifera1000]

I saw a video where someone installed a turbo onto a slant 6 and it was doing 9s on the 1/4

[@tipeneuriti5489]

Hi Steve great job you've got the much envied Mopar

[@scrappyhustler7467]

If Mopar had to compete with the Buick grand national but this would be a slayer 👌

[@steelwheels327]

Wow!!i would've loved to hear her purr!!

[@BoostedDilly]

Next summer we will, gonna meet up with Steve for a follow up

[@caribman10]

Chrysler should have done a Paxton option to 8 lb.+ boost before they stopped using the 225.

[@BoostedDilly]

I don’t disagree! Would have been something Rad

[@woodhandle]

Hoooh boy #DreamSlant, hope mine can stack up. Nice car, nice vid!!

[@ezrabrooks12]

BEAUTIFUL DUSTER!!!!!

[@Randy-lf2dp]

Nice i like 340 with manual trans. Demon or duster

[@BoostedDilly]

Yes I like the 340 in a duster too, but to keep it original and bill it. Nothing better!

[@tipeneuriti5489]

Hi brother 225 I had 2 Ap5 Ap6, Aussie models

[@calvincrews3885]

Who needs a V8 engine if you want a slant six cylinder engine that you can have fun with performance parts and parts are reasonable and cheaper than a V8 engines including the LA Magnum and hemi motors too

[@skybumifly]

Love it! Really making me miss my '71 Demon right now.

[@BoostedDilly]

Tell me about the demon! What were the specs on it!

[@hatersaywhat8986]

I can only imagine the conversation he had with the injector clinic (?)

[@sock979]

Just freaking awesome I can't wait until I'm able to do my straight 6 bill but it's going to be a Ford 300

[@FJ80Coop]

Yepppppp,it's a MOPAR world !!..😁

[@BoostedDilly]

Definitely

[@23toxsick]

Hell yeah slant six love this motor

[@joenewman6494]

Nice car my first car was a 1965 dodge Coronet with a slant six everybody thought I had a v8🤣

[@BoostedDilly]

They are underestimated

[@davesnothereman7250]

Very nice build.

[@nzsaltflatsracer8054]

Too bad we got music when you got to the interesting part. Amongst my R/T's I have a factory Plumb Crazy slant-6 70 Challenger that I over bored .160" & built a blow through turbo setup with a Q-Jet carb. It was the first car I bought when I arrived in the US back in 87.

[@BoostedDilly]

Will be doing a follow up this coming spring with some out door content! And sounds pretty rad!

[@ericraupp3673]

Spend so much on a inline 6. Why?

[@nzsaltflatsracer8054]

@@ericraupp3673 It saved a rare matching number Challenger, turned it into a silent 350hp cruiser & gathers more people at a show than any other belly button cars. I have a 70 R/T Challenger, a 70 Cuda & a 70 R/T Coronet but prefer to drive the sleeper.

[@BoostedDilly]

@@ericraupp3673 Because he wanted to keep his car original but wanted to go fast. Typical dusters get the 340 swap and go. Something unique and different.

[@biggerbehindthetrigger2814]

That's what I'm building. I have a 65 Plymouth Valiant wagon that's going to be a dragster with a 225

[@BoostedDilly]

That’s badass! What’s the goal Et wise?

[@biggerbehindthetrigger2814]

@@BoostedDilly I'm hoping for low 10's high 9's. I get my chassis certification on May 28th. That's when they will be at my local dragstrip. I hope it passes.

[@BoostedDilly]

@@biggerbehindthetrigger2814 Good luck!

[@biggerbehindthetrigger2814]

@@BoostedDilly I plan on going broke with it.🤣

[@BoostedDilly]

@@biggerbehindthetrigger2814 😂😂

[@markusa5521]

Cool story

[@peterbilt8799]

Awesome job Steve!!!

[@walterfurian8806]

Would put a lot of cars to shame. Love it !

[@BoostedDilly]

It definitely does’ it’s a pretty rad car!

[@carnut7615]

Pretty sure I caught a glimpse of this car at the MCACN show last week, the 225 was a bulletproof engine just never had much power, I never heard of one blowing away a small block V8 before.?.

[@Imnotyourdoormat]

Uncle Tony seen this?........

[@BoostedDilly]

Who?

[@Imnotyourdoormat]

@@BoostedDilly Tony DeFeo of UTG Uncle Tony's Garage

[@BoostedDilly]

Oh UTG no I don’t think so

[@Imnotyourdoormat]

@@BoostedDilly Well, he needs to. I've been with him a long while so I'll be telling him about it. Great Car!!!

[@BoostedDilly]

Definitely! Tell him I said Hello! Big Mopar guy myself/ I got a duster I’ll be digging into once I buy a house!

[@cindys1819]

OK, few questions: Fist how big is the engine? How much boost are you running? What kind of head work? What are the cam specs? What internals are you using? What did you do to the 904BTW, GREAT JOB....

[@BoostedDilly]

It’s a 225 cubic inch that is bored and stroked, Head was built, cam specs were kept secret, forged internals, and he kept the original 904, but it was built to handle 1000whp

[@Danthehistoryman]

The leaning tower of power !

[@Randy-lf2dp]

Nice i had slant 6 in my dodge aspen it had that lifter tick slanty eyed 6 they use to call mine reliable motor the slant 6

[@1sinister80]

I like all the old cars. GM Ford Crystler all made good stuff back in the 70s and before. Now it's only Ford for me if it's american made. I have had a lot of issues with Dodge and Chevy products since 2000 or so.

[@nunyabiz8887]

👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@quadsman11]

I'm a HUGE FAN of the torque monster straight sixes ! Especially those " Leanin' Towers of Power " ! Would love to be able to talk to you about an even crazier idea I have about building an even more insane concept SLANT 6 ! Would love to be able to follow up with you on so much of your details to if you would be willing Sir !?

[@BoostedDilly]

Will be doing a follow up next spring with him! He was pretty busy this summer

[@daviddaigle2419]

He's not wrong a bout six cylinders i smoked a mack 1 mustang I my 1975 AMC gremlin x 258 4 speed ad a 500 cfm holly and a slit header and del city ok was never the same

[@jimkoval4725]

Sharp machine. I would have liked a closer look at the engine.

[@BoostedDilly]

Definitely! Will be doing another video of the duster!

[@edwarriner1096]

If you ever decide to do something like this again get in conact with "CLIFFORD AIR RESEARCH." I am not certain they still make it new, but I do know that they made an intake manifold and pulleys to install a 4-71 "GMC PUFFER" on just about any 6 cylinder, including both of the "LEANING TOWERS OF POWER." Oh yeah they also made them fffeeerrrddds & shooooovies.

[@peterbilt8799]

Gotta remember that one " leaning tower of power "

[@MrTheHillfolk]

@@peterbilt8799 first time I seen it was in a magazine back in the 80s but it goes wayyyy further back than that.

[@richardturk7162]

Sweet Duster

[@gerrywood3584]

Bullet proof mill

[@peterkeeler7978]

Only one thing a graduate would fear more than seeing that in the driveway.......a gremlin or hornet.

[@user-ti2do2eu2j]

How much comp and bost

[@ldnwholesale8552]

How do you keep a crank in it??? I believe the numbers but also know slant 6s with only 4 main bearings on an iron crank. Which break at 300hp n/a when revved over 6000.

[@BoostedDilly]

I’ll ask him the next time I see him! Will be doing another video in the spring

[@danielkruger4305]

I'm fairly sure that I did the radio in that car.

[@joepearce3033]

Cool car

[@dannymostarac1799]

600hp😊

[@xmo552]

Look left🙄 Look right😒 Where's Uncle Tony?

[@BoostedDilly]

Unfortunately he’s not there!

[@voodoochild661]

I’d like to see a dyno run before I believe that 600hp number 450-500 will put you in the low 11s high 10s sounds more believable but either way bad ass car especially for a /6

[@BoostedDilly]

Dyno sheet was in the car.

[@CarsandCats]

It's a 10.50 car, numbers are spot on.

[@darrenjohnson3221]

His quarter mile trap speed would have to be 134 mph to have 600 horsepower I would say he is probably in the 120 mph trap speed for that ET of 10:56. That car is probably around 3200 pounds with driver if you add it all up it's not over 450 horsepower no matter what the so called Dyno sheet says sorry to bust bubbles but 600 horsepower out of any old school straight six isn't going to happen just bolting on a turbo or supercharger easier with the turbo though than the supercharger and possible with a turbo with a ton of boost but not with this car and it's supercharger nice car but it's definitely not 600 horsepower not even close.

[@thedukeof5a]

Did you find out how much boost he runs? Really impressive.

[@BoostedDilly]

I did, but I honestly can’t remember

[@peterkeeler7978]

Dad........l thought you said we were not POOR.........