Horsepower Upgrades and Dyno Tests! Chrysler 440 V-8 Engine | Redline Update

How much HORSEPOWER and TORQUE with our Redline Rebuild V-8 make on the engine ? And what occurs when we make a couple of "Day 2" upgrades to the leading end? See and discover! If you have not currently, watch the full engine and car time-lapse construct video here:

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Davin heads down to Pinnacle Competition Engines to dyno our newly rebuild race automobile engine. After doing a couple of pulls on the dyno to get standard
HP and torque numbers, he then starts to make incremental upgrades to the leading end of the engine to see just how much more power we can squeeze from this hunk of iron. Upgrades consist of headers, electronic ignition, new consumption manifold and carburetor, and finally some roller rockers to complete things off.

0:00 – Intro
2:03 – Engine startup, check timing, heat up
4:18 – First dyno pull and results
5:59 – second dyno pull and results
7:27 – Changing timing
10:29 – 3rd dyno pull and results
12:50 – Header "upgrade".
15:26 – fourth dyno pull – with headers.
16:58 – Updating to MSD electronic ignition.
18:39 – fifth dyno pull – with headers and MSD ignition.
20:23 – New consumption manifold and carburetor.
21:50 – 6th dyno pull – headers, MSD ignition, new intake and carbohydrate.
22:24 – Adjusting timing, carburetor tuning … needs more fuel!
22:42 – 7th dyno pull – more fuel, adjusted timing.
25:03 – Roller rocker upgrade.
26:51 – 8th dyno pull – with new rockers.
28:20 – Adding our fancy headers!
30:08 – Last dyno pull – our headers, new carbohydrate and intake, roller rockers, MSD ignition.
31:00 – Wrap up and summary of results.

#RedlineRebuild #Horsepower #enginerebuild #dyno #neverstopdriving #redlineupdate.

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Horsepower Upgrades and Dyno Tests! V-8 Engine | Redline Update

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About the Author: RareCars


  1. Would have liked to learn what the AFR was before and after the headers. In my experience, they tend to lean things a little and that can add some power if it doesn’t go too far. Also, did the detonation changed with the headers?

  2. *DAVIN!*
    First off, thank you Hagerty for putting out this sort of content, *especially* with *Davin* !
    As an old geezer type with a lifetime love affair with Mopars (especially 440s), I could have probably
    saved Davin a little time with what to set things at, what carb/intake, etc. but it all worked out fine.
    A couple nitpicks, of course – the TQ wasn’t on any Mopars until 1971 (not the late 60’s as you said)
    and probably a better carb to start out with for the stock “street” baseline would have been the Eddy
    AVS2 800cfm, which is fairly similar to the original AVS carbs 440s had in the late 60’s.
    TQ’s were emissions carbs, not the greatest for use here.
    Still, all said – I’m very pleased with the results and yes, 440’s LOVE headers (and dual plane intakes).
    Distributor initial at about 10BTDC, all in at about 35-36BTDC and feed it decent gas and you’re good
    to go, especially with a vintage Mopar electronic ignition conversion on it.
    Thanks guys!
    – Ed on the Ridge

    1. Ed, do you watch Donnie Laws too? I believe I’ve seen you there, but also SRC and Steve Mags channel. I live over here on the Plateau in Morgan Co.

  3. I have to admit, I really enjoyed seeing Davin try to wring out more power on the Chrysler 440 engine that was rebuilt in the timelapse video.^^

    It shows how different parts and ignition tuning can affect the engine’s output.

  4. A lot of work has been done! I never thought that so many horses could be obtained only by ignition. Probably this is a feature of large motors. On “chainsaws” with a volume of <130cu, the increase is extremely small, even in percentage terms.

  5. Sweet!
    The 383 in a truck we played with made the most torque with about 4 deg initial timing. That was the “seat of the pants” dyno with an edelbroken carb and an “RV” cam grind. Made for a fun rig.

  6. Wow!! The sound of a big block MOPAR hitting the big numbers is incredible. Can’t wait to see what your next project is.

  7. I like the dual plane intakes for the bottom end. Headers over stock exhaust always. Good stuff Davin!!

  8. this was very cool! love to see the back to back comparisons and data analysis. interesting tests for sure. great video keep up the hard work!

  9. There is no mistaking the sound of a 440. Such a beautiful low end grunt! And that torque curve. Those motors were just power. Pure power!! What a great build. I never miss these. :0)

  10. Nicely explained and shown for those not very mechanically inclined.
    Excellent job. ๐Ÿ‘Œ๐Ÿ™‚๐Ÿ‘

  11. Roller rockers are more accurate with the ratio and over stock rockers, the engine may have picked up valve lift. If so, that would also account for some of the horsspower increase with the roller rockers. This is one of the most thorough dyno testing noting the addition in horsepower with each addition. Thanks for spending the day doing this and the day editing and uploading. Great job.

  12. All terrific stuff overall! Davin….i was most impressed with what you & your staff were able to achieve given the “stock” engine results – – over 400hp on old/rebuilt plain-jane big block with stock pieces. Awesome!

  13. this was a cool upload. seeing power addersโ€™ performance results real time is actually priceless. Iโ€™d love to see Davinโ€™s Red Chevelle come back around for something. the โ€˜66 & โ€˜67 Chevelle in Malibu trim is my all-time favoriteโ€ฆand this coming from the son of a Pontiac Man with 3 โ€˜64 GTOs

  14. Great job guys! I wonder what fuel injection might bring to the game? Any idea what class this jalopy might compete in? Very interesting thanks for doing what you do!

  15. Excellent content. Really enjoyed the whole build of this 440 Mopar. You guys did a great job with this episode, showing the difference how much each change made a to the previous with real data. The stock numbers were quite impressive as well. Hats off to the machinist & mechanic!
    Well done & keep up the good work. Cheers๐Ÿ™‚

  16. WOW, Rusty old headers for the win !!!! Awesome 440. Those secondaries on that thermoquad sound wicked! ๐Ÿ‘Œ๐Ÿ‘Œ๐Ÿ‘๐Ÿ‘๐Ÿ˜Ž๐Ÿ˜Ž

  17. Excellent video. You should have used the time honored Edelbrock Performer RPM intake. I guarantee it would have gave exceptional torque and horsepower, especially compared to that outdated unit.

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