STOCK 440 Challenger RT Dyno Day | 440 Mopar Big Block Dyno |
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- เผยแพร่เมื่อ 22 ธ.ค. 2024
- Its dyno day for the 1970 dodge challenger rt! This car is sporting an original 440 HP from 1970. The engine has been rebuilt to factory specs with only a few minor changes. We will be running this car on the California Auto Workz dyno in Hemet California. Carburetion is controlled by a Proform 750 mechanical secondary, race series carburetor sitting on top of a dual plane aluminum intake. Exhaust is handled by a set of 1-7/8 long tube headers ran into dual 2.5 exhaust tied together with an xpipe and then entering into a set of chambered mufflers. The transmission is a 727 automatic and the rear end is a mopar 8-3/4 3.23 sure grip rear end, both original units. Today we will find out what a 440 mopar big block ACTUALLY does on a real dyno. This aint no motorhome 440, I hope it makes good power but we'll see!
#mopar #challenger #dynoday
My dream car in its dream year in my dream color. Dad has great taste.
I'd say so 😂
I would do a leak down...engine runs like its tired. Did that engine ever see the honing tank, I would bet the rings are not seating 100%..... she's huffing bad after the pull, beautiful car!
Sharp car, sounds good. If it feels like it runs good, don't trip on the digits.
So many comments obsessed with numbers on a screen, when in a real life scenario, those numbers mean nothing...
Ive also seen a 165 hp Honda civic that was strapped to a Dyno....and after about 4 pulls he typed in a few different digits and made it read 435 hp. Its not hard to make a Dyno lie
I totally get it. Plus not all dynos read the same so really its never apples to apples unless you use the same dyno on the same day
Not trying to a dick but the name of the game is to make hp not lose hp.. It's got a better carb,better cam ,better exhaust manifolds than factory...
😂 I don't understand. The engines came with a 750 from the factory. The performer intake is basically just an aluminum stock intake. The cam is just a stock replacement or slightly better cam. The only real upgrade was the headers. So to the wheels thats about where it should be if SAE is 375hp.
So, you're tell me..That intake is only for looks?? It's not better than the stock intake?? That carb isn't better than the factory carb?? The technology of carbs now a day is way better than back then..I'm not being an asshole..I'm just trying to understand your methods..
Air flow is airflow. They've done back to back tests on the performer and the stock intake. The performer is good for maybe 5 HP. Its still a heated low rise intake. The performer RPM is a better intake but it doesnt fit under the hood. I think this car would pick up power with a low rise single plane over this intake. The only difference between this carb and the factory 3310 was that this carb has mechanical secondaries and the 3310 doesnt. They were both downleg booster holley 4bbl carbs.
I will say this though, that dyno reads low about 30hp compared to other dynos. We tested it last year with noboltsleftbehind's challenger. So final numbers are a little higher.
@@nightwrencherperformance sounds about right.
So evidently the timing does affect the air fuel ratio
Sorry for the late response but yes, it does. The more efficent you make an engine, the more of the fuel that it will use up in the mix which means more power and less wasted fuel. I have a video of my charger with a turbo big block and the same thing can be seen but with boost pressure. More boost = more compression= more efficent burn = leaner
Your 271 horsepower at the wheels comes out to be pretty strong I think
It was probably closer to 300 because it was dynod in 2nd gear and not 3rd but its still lower than I would have liked. Definately needed more camshaft.
From dyno test I have seen a stock 440 375 horsepower actually makes about 330 horsepower net
This car was Dynod in a lower gear so if it would have been dynoed in the correct gear, the number would have come up closer to that.
The dyno session was a success and you accomplished what you took the car there for. Good tuning techniques and exactly what I would of done. The engine does seem a little underpowered but dynos are different. I have a 70 GTX with a warmed over 440 6 barrel. I would go back and compression test each cylinder. Also how many miles does the engine have on it? Seating the pistons can take a while.
Thats what I was thinking. The engine is actually fairly fresh. I didn't build the motor so I have no idea what compression ratio they built it to or anything.
440 Magnum 4bbl were 410 hp factory the 375 hp rating was low balled due to regulations but nonetheles...
I owned bone stock 440's in the 80's Dad,Uncles owned them brand new...I drove bone stock 440 Magnum cars and raced them against the exact same car ,same automatic,same axle ratio..The rebuilt cars more often then not were slower than the original cars..the rebuilt engines had bigger cams and some were just a cam swap others had more work and they ran slower than stock..Thing is most people never drove original ones just original ones running on 6 of the 8 cyl..Yes they still run and move pretty quick!
We ran stock vs modified/rebuilt 340's...360's..383's..400(the high performance version)..413...426 Wedge...and 440 Magnum/Super Commando/TNT and 6 barrel,6 pack.
My Uncle owned a Chrysler dealer back in the 50's to late 90's...I had the luck to drive the muscle era cars that were never abused..Albeit I started driving in the 80's,most guys who bought them used in the late 70's-80's ran cars that were slower than when stock..
Nothing ticked a guy we ran into back in the early 90's he had a 69 Coronet RT 440 magnum,nice lumpy cam but he couldnt outrun a 383 4bbl Newport that was 100% stock! Dont laugh that Chrysler ran 13.90's factory tow package and 3.55 gearing,high performance 383 4bbl...Ran 13.90's with 2 guys that were 220 and 280 lbs lol..
I think I ran into a similar issue with my 361. I did a cam swap and the car when slower and was a pig off the line. Lost too much torque for the stock 1600rpm stall converter
So less power than a 2005 4 cylinder? I thought these things were fast?
I don't understand why you would even comment.
Nobody cares about your Hyundai, even if it's fast, not because the car sucks, but because you do.
Your entire personality is whining on the internet. STFU
I would still like to see a naturally aspirated 2005 4cyl make 275whp 😂
I would like to see the torque figures for a 4-cylinder also
Must be 8.1 compression because my 413 made 307hp and 377lb-ft at the whels with 9.4.1
Now to get those wheels right
I'm trying!
would get an updated camshaft installed after leaving California
Cooool!!!
Good thing I'm not racing this one 😂
As he said h.p. is measured at the wheel...12-15 percent loss due to reciprocal mass, 160 h.p. 4 banger will 130 ish at the wheel😢
My 160hp Toyota V6 made 110hp at the wheels 😂
Hmmmmm…… seems a bit low considering it has headers. But just a hair. Those numbers put you at around 350-ish horsepower at the flywheel. Maybe compression is less than stock? Maybe the rings still need to sit better?
The drag strip will ultimately tell how powerful this car is.
Not bad, nice car seems a little low on power. But dynos can very greatly so can the enviromental conditions. Bottom line as long as you happy with it that is all that matters.
My dad was pretty happy after the fact. He said the car drove way better on his way home. He was never really interested in racing it, its just a cruiser for him so this is fine 😂
***Leave California Now!! While you still can.
I'm working on it, trust me 😂