Well Manny id rather see you backing up Nick than anyone. You and George are awesome msinstays to the team. And Manny was very patient!

I had a 66 model 383 build was : 30 over trw 383 magnum replacement pistons 60 thousands in the hole unbalanced rotating assembly, 140 pounds of cylinder pressure, 69 906 heads cut 28 thousandths and a street port and polished stock valves, purple shaft 484 lift and 284 duration cam, crane roller tip aluminum adjustable roller rockers, edelbrock torker 2 intake with a street port and polish , 750 holley mechanical secondary carb, hooker 17/8 headers, 727 torqueflight tci 3,000 street fighter converter, dana 60 rear 4:56 gears in a 83 dodge ram short bed 3,600 pounds without driver through the exhaust, hoosier quick times tires and pump gas best 12:50 at 109 mph back in the early 90s never dyno tested and probably lower 9 compression ratio with that cylinder pressure i as well as a lotta other people at the track was pretty impressed with the performance i think with the right parts a 383 mopar is a pretty stought little cubic inch big block !!!

Hi Nick, I'm running a 230 in my 1953 Chevy truck.. love it..

Over revved.

What's cranking compression psi? That'll reveal why its soo soft. 0.050 in the hole is ridiculous, that should've been rectified during the build, that'll destroy quench which is not good. Didn't see him degree the cam to varify it's installed correctly, that can be a huge problem as well.

Maybe the dyno isn't right

i waited all day for the engine to get started and what the hell all i can hear is the dam radio

Hello why are you fastwording the video, thats rediculous.

this advertisement on fast phone charge, don't charge any faster than any other charger

Hey Nick, did you mic the cam for specs?

i have a radio george

It's so hard to watch this guy

Chevrolet v6 engines in the late 70’s early 80’s also had cam failures! Ask me how I know.

This young man is getting a great lifetime of learning from this Man. WOW!

This is why I watch Nick, not when things are easy but when they are not. I learn more in ten minutes from Nick and friends than anybody else

Can you build a Dodge Nascar small block I believe it's a R7 motor or something like that

So you have an airflow issue. A poorly done valve job can kill airflow. Im sure seats sunken too far can also effect air flow. They say anything withing 1" off the seat is the most critical for airflow, discharge coefficient etc. You'll get it whooped Nick.

Be interesting to measure & see exactly where top dead center actually is, and degree the cam. Mopar non-hemi engines like a narrow lobe seperation angle 104-108 in my opinion. Whatever it is, Im sure you'll find & correct it.

I have faith Nick will handle it. This is real life & Nick is such a wonderful person. Pleasure to watch him work.

Good show Nick . I'd sure look at the cams specks compared to builds that produced wear on the headrest . I always preferred a hundred eight separation with duration that fits his overall use case . Thanks T/C/E

A modern Coyote powered mustang will walk a HEMI. The golden age of horsepower is now

Do people try and find their matching number hemis there were so few I’m sure there are guys driving with each other’s engines.

Love this engine. Love the odd intake manifold(s), and the supremely well balanced HP and torque. THIS is the mill Mopar fans should rave about, not so much the Hemi. One thing that seemed odd to me is that the air cleaners made it run leaner - I would have thought that restricting the intake air flow would have made it run richer.

Well ??? What else can you do for higher numbers ??? I'm kinda disappointed... In light of all the modern science ... Was kinda expecting higher numbers !!! In my youth I quickly found out that the Hemi Game was all about the Dollars !!! As a farm boy and after granadeing A 69 Street at 149mph I still managed to coast into trees and avoid the tickets . That were well in excess of the value of the 69 super chicken !!! I quickly found parts well out of my reach and wallet size !!! It's really good to see that these pieces of Automotive Magic are still alive !!! Especially since my small wallet has difficulty even keeping a 4 banger alive !!!

I'm kinda curious what a "Chill Can" for the Fuel would actually do ??? Old school chill can is a coil in a can of ice ... Heard between 10 an 25 horses ??? Then there's the water injection or other liquids ???

Nick pull off the heads put new seats in and set them up correctly.

Nick back off preload on hyd. lifters this will fix it. Valve train geo. is bit off.

Billet cams are really good

I went through this last year with hydraulic flat tappet cams. Both lobes being wiped and lifters having the entire top ground off! I went to a roller, that fixed the problem.

Mopar deck height almost always need machining and degree a camshaft can make a big difference in power, I did 340 8 years ago spent good money machine shop the heads got everything done degree camshaft made more then stock but used more modern cam profile.

Lifters are to high keeping valves open at high revs.

It's not that Nick unfortunately all the parts nowadays are garbage

Would it be the lefter rods being to short.there for giving a short stroke on cam.

In 75 I had Hubert Sester in Port Albernie build me a 383 for my 70 Charger RT/SE 4spd. That 383 was incredible it gave the Charger uncatchable status according to the town prosecutor in Courtenay bc

Awesome 👍👍

Cork valve cover gaskets are junk. I always use neoprene gaskets.

i just knew the ignition was gonna fix it. power levels sure are flat.

i would check the connecting rods.They may be a hair to short,Back in the day a friend did some mopar over, i cant say which,but it was a dog after words,come to find out it was wrong connecting rods not bringing piston all the way up

Everyone knows that money is always a consideration when reworking a older car or trucks power plant. But spending cash on another set of parts cost without knowing how much is left on the bone. The original heads can not only be reworked but upgraded with new and larger seats and valves and the ports can be opened to match checked by a flow bench. Compared to the starting point of where they are now. That 383 can match or surpass a 440 no problem. I know if it was my engine i would reset the starting point on those heads and be ready for the next rebuild. That's the most important thing when dealing with a numbers matching engine, Keeping it all together and making the most of what you have.

She is a keeper😮😮😮

Why not do a compression check? Leak down? Maybe the cylinders aren’t machined properly or the rings are gapped correctly?

Who cares if its loud!!! It sounds f**king Awesome 😯😯

miss marked crank gear.

Um, WOW! Cast iron heads, manifolds and pump gas equals 400+ HP? Unbelievable! I think I might stroke my teener out! What cam what that again?

All I can think is, she's just not breathing

George can you stop putting this noise in the background

I have owned and driven three 383 powered 1968 Mopars. Absolutely loved all of them.

I have a 71 Cuda drag car that was built in ontario as a drag car I purchased it as a roller and have been running it with a 318 set up for nitrous. My Son and I are going to put a new style Hemi in it. Always wanted a Hemi Cuda it will be the next best thing. Were putting a 440 in my 73 Duster the Cuda is next winters project I'm giving my Son the small block for his Ramcharger Mudbogger

You're the best friend 🧡

Viewer has said it . Could it be a manifold restriction ?