Відео

The 400 is the most unappreciated, underrated engine ever made.

Good fucking God. I remember that article back in the magazine days about the plymouth arrow 383 with hemi heads and they said they ended up using 400 blocks, but they wouldn't last long with the technology of the time...they'd Rev em 10k. I'm assuming these blocks here are probably hard blocked and girdled. I also heard stories of big mopars cracking in the main webs and lifter area at around 7 to 800 hp. Obviously these guys know how to prep em for that. I've been wanting to build a 383 I have and do twin turbos or a blower for a street car and make about 800hp, but was worried it wouldn't last. Maybe I'm not so worried anymore.😃

Mopar Muscle!!! Thanks for sharing.

Geezus

Amazing Stuff‼️ The Lowdeck( use to Free if you want it) 400 Really is Something 👍👍

what kind of valve train was used to run at these rpm?

It's great to see a Mopar engine perform like this. My question is, when will the technology bleed down to a set of affordable heads that could be ordered off Jeg's, Summit, etc. There have been heads available for Chevy and Ford that produce good hp for years. Those of us dedicated to Mopar are left with no choice but to pay if we want to play. I have an altered that I refuse to put a Chevy in but can't afford the Mopar motor I want to put in it!

I filled my block to the bottom of the freeze plugs and used 4 bolt mains from pro gram specialist in Ohio ran 15:15 to1 alum rods and it lived unto i sold it 10+years dyno at Koffles 928 HP 800 Torque one 1050 carb

Good Lord.....9700 rpms...😬😳🤤...kinda made me pucker a little towards the end...😅

Oh God 400 inches and 1,000HP!

Definitely one of the best sounding engines on the dyno I've heard. Nobody in the past put faith in that 400 block.

Insane, i took my 470 to 7100 rpm on the dyno just to see how far the power fell off from peak power at 5800. My next build will be b1 headed for sure.

Man that is an impressive build. That short stroke Devil 👿 ! Well done sir.

Oh my!!! What an awesome engine!!! How much does something like this go for seriously?? I've been looking to replace my small block in my 79 Volare duster drag car with a big block that can rev to high rpm like this, I rev my small block to 8500rpm before I shift it but this thing seriously winds up!! Awesome stuff!!

A little Wayne county speedshop Darrel alderman/Scott geffrion action here!

Outstanding N/A power numbers. But i can understand why guys are choosing power adders. Same numbers can be produced with less RPM and longevity.

I can only imagine the thrill of dropping the clutch in this thing!!!!

Stock stroke 400?

They pulled my motor on the same dyno, it made 989hp. Rich Dave Scott built me a street motor with less compression less camshaft less cubic inch less money and made 80 more horsepower. 557 hemi sheet metal intake pair of 1050s. These guys are the top of the heap purely great people. Remember the Darrell Alderman day's 💪💪💪💪👍

Damn boys....that thing is stout!! 😅

That’s an incredible engine you built. I knew that 383’s and 400’s could rev like crazy. I wanted to build one with Hemi length rods. That gives you a 2-1 rod ratio. What did you use?

400 Best production engines! love them over a Hemi

That's FKN singing

Be fun in a street car... Oh yes

Thanks so much for sharing, what class do you plan to run with the Dart? I'll be a fan!

Wow amazing ! That is a killer engine, would love to see a video of it in a car , racing.

Many yeas ago I think there was some guys who ran a b1 Mopar around the Denton area . Nice to see a B 1 motor make power. Thanks for the video

That beefy Mopar 400 is just on the brink of exploding so many rpm's never seen before crazy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! thanks

Very impressive. Good job on the build. Nice numbers. Thanks for sharing. Take care, Ed.

Goddamn I had my headphones on it sounds crazy I was cringing lol!

That's absolutely amazing

Hi Neil. Man I dig this engine, I’ve probably watched it 10 times since you posted it. I like seeing a B1 head ran at these smaller cubic inches. I see the steel T&D rockers… what does the rest of the valve train look like? Do you disclose the cam specs, core size, lift, & duration…? Also what about the oil system? Have you looked at the bearings after running it at this rpm? Thanks for sharing. Kevin Griffitts

Wow that's awesome!

1000HP on 409 cubes!!!! Holy shit !!! Bad bitch right there 🤟🤟

Wow!!!!! 9500rpm is crazy!!!!

Koffel's Place, man I thought they were gone! Good to see you guys are still around👍🏼

Impressive. Would love to see specs

Cant see any numbers or voice on my vid. Cu in ? RPM. TQ. HP. Fuel curve. But sounds very strong.

Ho-ly shit! Congrats guys.

Love it , great build. What CR are you running ? It's hard to get a piston for a 400 block unless it is stroked. I'm rebuilding my 400 into a 500 and want to make 1400 hp with Predator heads. This sounds incredible !

Alot more load when the engine is in a car compared to a dyno

Mopar bb= boost l boat anchor

Wow!

Amazing. Happy for koffel family, they are great people!

WOW unreal / sounds like a prostock motor

That thing is no joke!

Wow! A big block turning those RPM's

WOW. On 2 bolt mains no less. I wonder what was done for bottom end stability, oiling, valve train to handle that kind of engine speed. Holy moly.

Pretty neat stuff.... that poor 400 Block though, curious to see how long it lives ?

Holy Smokes !!! What is that engine going into ???