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moparcanuk
pro stock


Reged: Nov 23 2007
Loc: Orleans, Ontario
Anyone dyno a completely stock 69 440?
      #6112281 - Thu Jul 29 2010 07:15 PM

I know the official rating is 375HP. Just wondering that the true HP rating is.

--------------------
Bernie

Remember when your cup holder sat next to you in a mini skirt and tank top?



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vdriver
super gas


Reged: Dec 07 2003
Loc: Leucadia, Ca.
Re: Anyone dyno a completely stock 69 440? [Re: moparcanuk]
      #6112416 - Thu Jul 29 2010 08:22 PM

http://www.moparmusclemagazine.com/techarticles/mopp_0104_buildup_1969_440_magnum_engine/index.html

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moparcanuk
pro stock


Reged: Nov 23 2007
Loc: Orleans, Ontario
Re: Anyone dyno a completely stock 69 440? [Re: vdriver]
      #6112442 - Thu Jul 29 2010 08:40 PM

Thanks.

--------------------
Bernie

Remember when your cup holder sat next to you in a mini skirt and tank top?



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GTX MATT
Waiting...Still Waiting..


Reged: Jun 05 2006
Loc: CT
Re: Anyone dyno a completely stock 69 440? [Re: moparcanuk]
      #6112671 - Fri Jul 30 2010 12:38 AM

The thing that dissapoints me with that test is something that JohnRR pointed out, apparently that dyno was very friendly until recently, I believe it was something like 10 percent. I looked into it and he was right.

--------------------
Plymouth is out to win you over this year!


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BigDaddy440
enthusiast


Reged: Jul 23 2005
Loc: California
Re: Anyone dyno a completely stock 69 440? [Re: GTX MATT]
      #6112706 - Fri Jul 30 2010 03:04 AM


This probably won't help you, but I dyno'd a fairly stock 440 on a chassis dyno years ago.

440, .030" over, KB pistons, Mopar .474 lift cam, stock 906 heads with upgraded valves and springs. Performer RPM intake, 850 carb, and 1 & 7/8" headers.

Made 305 rwhp and nearly 600ft lbs or torque on the dynojet dyno.

Eventually, I went with a bigger cam, and edelbrock heads and made 360rwhp.

-dan

--------------------
1969 A12 Roadrunner


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GTX MATT
Waiting...Still Waiting..


Reged: Jun 05 2006
Loc: CT
Re: Anyone dyno a completely stock 69 440? [Re: BigDaddy440]
      #6184968 - Wed Sep 08 2010 03:26 PM

Quote:


This probably won't help you, but I dyno'd a fairly stock 440 on a chassis dyno years ago.

440, .030" over, KB pistons, Mopar .474 lift cam, stock 906 heads with upgraded valves and springs. Performer RPM intake, 850 carb, and 1 & 7/8" headers.

Made 305 rwhp and nearly 600ft lbs or torque on the dynojet dyno.

Eventually, I went with a bigger cam, and edelbrock heads and made 360rwhp.

-dan




How much torque?

--------------------
Plymouth is out to win you over this year!


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JohnRR



Reged: Jan 20 2003
Loc: U.S.S.A.
Re: Anyone dyno a completely stock 69 440? [Re: GTX MATT]
      #6185260 - Wed Sep 08 2010 06:03 PM

Quote:

The thing that dissapoints me with that test is something that JohnRR pointed out, apparently that dyno was very friendly until recently, I believe it was something like 10 percent. I looked into it and he was right.




Don't you hate that ??? ... nevermind it was REBUILT , I'd like to see a LO MILEAGE survivor engine on the pump , something with under 5k miles or so ...

I think MM mag has me blocked, the link will not completely load ...


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JohnRR



Reged: Jan 20 2003
Loc: U.S.S.A.
Re: Anyone dyno a completely stock 69 440? [Re: BigDaddy440]
      #6185266 - Wed Sep 08 2010 06:05 PM

Quote:


This probably won't help you, but I dyno'd a fairly stock 440 on a chassis dyno years ago.

440, .030" over, KB pistons, Mopar .474 lift cam, stock 906 heads with upgraded valves and springs. Performer RPM intake, 850 carb, and 1 & 7/8" headers.

Made 305 rwhp and nearly 600ft lbs or torque on the dynojet dyno.

Eventually, I went with a bigger cam, and edelbrock heads and made 360rwhp.

-dan




I think you are right , that won't help , what was stock about it , SOME of the castings ??


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GTX MATT
Waiting...Still Waiting..


Reged: Jun 05 2006
Loc: CT
Re: Anyone dyno a completely stock 69 440? [Re: JohnRR]
      #6185489 - Wed Sep 08 2010 07:44 PM

Quote:

Quote:

The thing that dissapoints me with that test is something that JohnRR pointed out, apparently that dyno was very friendly until recently, I believe it was something like 10 percent. I looked into it and he was right.




Don't you hate that ??? ... nevermind it was REBUILT , I'd like to see a LO MILEAGE survivor engine on the pump , something with under 5k miles or so ...

I think MM mag has me blocked, the link will not completely load ...




I agree 100%, none of the resto cams actually replicate what stock was that I know of, and even if they do we probably dont know since we dont have the actual @.050 figures for the stock cams (although I do understand someone measured an A12 cam) and none of the "stock replacement" pistons deliver stock compression. I guess someone just needs to find a really low mileage original engine to test on a good dyno.

--------------------
Plymouth is out to win you over this year!


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RUNCHARGER
I Live Here


Reged: Jan 20 2003
Loc: Kelowna B.C. Canada
Re: Anyone dyno a completely stock 69 440? [Re: moparcanuk]
      #6185492 - Wed Sep 08 2010 07:45 PM

I've seen a few sheets on stock 68-70 440's and they are usually right around the 375. But of course no one races dynos.

Sheldon


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BSB67
top fuel


Reged: Feb 19 2005
Loc: Prospect, PA
Re: Anyone dyno a completely stock 69 440? [Re: RUNCHARGER]
      #6185585 - Wed Sep 08 2010 08:19 PM

Chrysler (Direct Connection) rated the 440 4bbl (no year specified) at an estimated 270 to 330 hp. FWIW

--------------------

500" NA, Eddy head, pump gas, exhaust manifold with 2 1/2 exhaust with tailpipes
4150 lbs with driver, 3.23 gear, stock converter
11.68 @ 120.2 mph


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Drummer 1-3/4
Not Cheap!! Just Thrifty!!


Reged: Jan 30 2003
Loc: Not here, bro!
Re: Anyone dyno a completely stock 69 440? [Re: moparcanuk]
      #6186342 - Thu Sep 09 2010 10:11 AM

FWIW, two different magazines over the years built what they said were "blueprinted" 440 Magnum engines and tested them on two different dynos. Both made about 350 HP and around 370 torque, IIRC.

Want a legit replacement for an OEM 383-440 HP cam? Speed Pro #CS661.


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Anonymous
Unregistered



Re: Anyone dyno a completely stock 69 440? [Re: BSB67]
      #6186361 - Thu Sep 09 2010 10:20 AM

Quote:

Chrysler (Direct Connection) rated the 440 4bbl (no year specified) at an estimated 270 to 330 hp. FWIW




That would have been net horsepower at the flywheel; gross would be higher - although not necessarily as high as advertised horsepower.

Hot Rod magazine dynoed a 67 383 4-barrel back in the day. Advertised horsepower was 325. They got 280.


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Anonymous
Unregistered



Re: Anyone dyno a completely stock 69 440? [Re: ]
      #6186477 - Thu Sep 09 2010 11:32 AM

I had a bone stock '71 440 with measured 9.5:1 compression, stock rods, pistons, heads, valves intake, crank etc.

It did have a 750 vacuum secondary 3310 Holley, 1 7/8 headers and a MP .528 mechanical cam. It put out 318-320 HP at the rear wheels and right at 400 HP at the flywheel.

Keeping that in mind I would say the 350, 375 and 390 HP gross factory ratings were dead on!


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ragtop
super street


Reged: Jan 22 2003
Loc: MA
Re: Anyone dyno a completely stock 69 440? [Re: ]
      #6186640 - Thu Sep 09 2010 01:21 PM

Did Mopar Muscle do a similar dyno test on a Hemi, 440-6, or 340 Six Pack? I have seen there tests on the 340-4, 440-4, and 383-4. Thanks.

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quickd100
Mayor Dave


Reged: Jan 20 2003
Loc: nielsville, minn.
Re: Anyone dyno a completely stock 69 440? [Re: ragtop]
      #6187155 - Thu Sep 09 2010 06:25 PM

My current dyno mule is a standard bore 440 with 68/69 stock cast pistons. Unfortunately, the block has ALOT of taper in the cylinders. On most pulls it's all done by 4500rpm, (turns into a mosquito fogger as there is no ring seal by that rpm.)
Mods to the motor are a mechanical cam, .495I, .519E, 239/246@.050 110 centerline. 1-3/4" headers, 452 heads with good valve job and home pocket porting. Compression is 11.26-1. Fuel is E-85.
The first pulls were with a '77 cast iron intake and my 850 E-85 thermoquad. Timing was set at 37 degrees and it made 344.9hp@4319rpm. (as I said it had a tremendous amount of taper resulting in so much crankcase pressure it pushed the breastplate gasket up to the bottom of the intake manifold.)
I switched to the MP M1 intake, and installed a another vent to the crankcase and plugged the PCV so I didn't have all that oil smoke recycling through the cylinders. I got the motor to run up to 4425rpm and it made 396.3hp.
I played with the secondary air door and got that dialed in. On one pull I was able to get it to pull to 4800rpm, it made 437.3hp@4791rpm and 488.2 ft/lbs.@4577rpm.
I know this isn't a stock motor but I believe the factory numbers would be pretty close to those that were published. Dave

--------------------
Speak softly and carry a BIG (605) STICK


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BSB67
top fuel


Reged: Feb 19 2005
Loc: Prospect, PA
Re: Anyone dyno a completely stock 69 440? [Re: ]
      #6187238 - Thu Sep 09 2010 07:05 PM

Quote:

Quote:

Chrysler (Direct Connection) rated the 440 4bbl (no year specified) at an estimated 270 to 330 hp. FWIW




That would have been net horsepower at the flywheel; gross would be higher - although not necessarily as high as advertised horsepower.

Hot Rod magazine dynoed a 67 383 4-barrel back in the day. Advertised horsepower was 325. They got 280.




Yes, I think you're correct, net, not gross.

--------------------

500" NA, Eddy head, pump gas, exhaust manifold with 2 1/2 exhaust with tailpipes
4150 lbs with driver, 3.23 gear, stock converter
11.68 @ 120.2 mph


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70sixpkRT
super gas


Reged: Jan 20 2003
Loc: South San Francisco, Ca
Re: Anyone dyno a completely stock 69 440? [Re: BSB67]
      #6187248 - Thu Sep 09 2010 07:11 PM

Quote:

Quote:
--------------------------------------------------------------------------------


Quote:
--------------------------------------------------------------------------------

Chrysler (Direct Connection) rated the 440 4bbl (no year specified) at an estimated 270 to 330 hp. FWIW


--------------------------------------------------------------------------------



That would have been net horsepower at the flywheel; gross would be higher - although not necessarily as high as advertised horsepower.

Hot Rod magazine dynoed a 67 383 4-barrel back in the day. Advertised horsepower was 325. They got 280.


--------------------------------------------------------------------------------



Yes, I think you're correct, net, not gross.




To me, wouldn't gross be at the flywheel and net would be at the rear tires?

--------------------

440-6PK
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)

2000 Dodge Ram 4x4, 5.9
2002 Dodge Durango (wifes car)


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BSB67
top fuel


Reged: Feb 19 2005
Loc: Prospect, PA
Re: Anyone dyno a completely stock 69 440? [Re: 70sixpkRT]
      #6187285 - Thu Sep 09 2010 07:28 PM

No. Gross is flywheel hp on a dyno without any engine accessories. Net will be a flywheel hp with all engine accessories. Then there is RWHP. For each of those three, there is corrected, and uncorrected (actual) hp as well.

BTW - Nice car.


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StealthWedge67
Grammar Slammer


Reged: Jul 19 2006
Loc: Puyallup, WA
Re: Anyone dyno a completely stock 69 440? [Re: BSB67]
      #6188379 - Fri Sep 10 2010 10:33 AM

Not a 440, but I saw an article in I believe Engine Masters Mag about a year ago where they assembled a RR spec 383, and came up with exactly 335 hp!

Horsepower ratings are sooooo subjective though. Seems that Ma Mopar underrated back in the day, or rated at low RPM's for some reason. I.E.: Sure, a 67 solid cam dual quad hemi made 425 hp at 4200 RPM's (published)... BUT, what was it making at 6200 RPM??? (Likely in the 475 range). Chebbie ratings were always impressive, but the cars didn't go any faster than mopars with substantially less advertised HP. Everyone raves about the LS-6 450 horse 454, but where is it at the drag strip?, likely struggling to keep up with a 375-horse 440. Buick GS 455's were rated at 360 horse, but they would flat blister at the track! The only thing that really matters is: WHAT DOES THE TIME SLIP SAY?

--------------------
'67 Satellite - full trim street car - 11.81 @ 113.... and tuning.
Pump gas 452" low deck in a plain jane 383 wrapper.


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