FaceBook 572 Hemi on the DYNO - Bargain or Bomb?

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[GuillaumeBourdeau-pd]

Dear Mr. Nick, I thought I would comment since I was told my name was mentioned in this video. First off, this 572 Hemi ran like a Rolex when my partner first built and tested back in late Dec. 2020.
The engines original owner wanted the look of dual in-line Holley's that would be easy to start and drive to Tim's and C&C, hence the reason why I built (& tuned) the twin Holley 600's.With 10.6 comp ratio and 205 psi cranking it ws a great match for pump 91. This engine idled at 1, 050 rpm with 17" hg, and approx. 13.8 AFR, made a very respectable 724 TQ and 735 HP with about a 12.7' ish AFR with pump non Ethanol fuel, it was actually pretty good on fuel, a testament to the machining & build quality.
But, after months and years of the engine sitting and not really being used, pump fuel with Ethanol takes it's toll on any carb, be it zinc or aluminum, just not Holley's LOL. I had to "visit" the shop to "clean & fix" the new carbs due to corrosion/varnish that can bugger up a Holley or any carb real quick. I have no idea why the distributer was removed and installed 180 off ? I guess the carbs could of (should of) used a rebuild.
If you have any Holley's you are tossing away because they are older than 3 years, please let me know, I'll drive to your shop and be glad to take them off your hands, I'm serious on that. By the way, it's a solid roller.

[mrutherford]

When I saw flames out the exhaust and intake I knew it was 180 off

[todddenio]

If it went through that much gas that fast I would be wondering about the oil being washed with gas and change it

[twodogs]

Check the Oil, Make sure that lost fuel isn't in the Pan.

[kmrumedy]

This is one of the best episodes ever!! Great for viewers that love to learn. Can't wait for follow up video. I'd also check the oil for gas. All that gas went somewhere.

[TheWatsonclan]

this was like amateur night, lucky there was no significant damage to this engine

[dougbaran]

It’s out 180, never take anything for granted.

[tommontague]

180 off....Power valves blown from back fires, Ck the oil level...full of gas?...Good video!

[Bigeu]

The typical drawback of a carburator on a highly cammed engine, you have to open the primary throttle blades quite a bit to allow more air into the engine to get it to idle decently. For those that do not know, that will expose more of the idle transfer slot than it needs to be, usually .040 max opening. When that happens, its allowing more fuel into the engine and the idle mixture screw adjustment becomes inaffective. The fix is to open the secondary throttle blades just enough to get the primary throttle blades back into adjustment, then your idle mixture screws will become effective once again, its a wee bit tricky, but it can be done.

[davidcaskey]

I didn't watch live but when I saw backfires I thought it's out 180 degrees! Been around long enough to check timing every time!

[paulangelotti]

looks like it 180 out won't hurt to check it out...never ever take it for granted

[MightyJoesGarage]

As soon as it backfired the first time I’m unsure why the timing wasn’t checked, I was screaming pretty loud to check timing but nobody heard me haha

[blinkie]

Looks forward to the next episode when Nick has worked his magic and this 572 Hemi will be running as sweet as a die. George you got some great shots when it was back firing up the chimney, wow!

[TechnikMeister]

Its at this stage when you realise that chrome will not get you home. Down here in Australia, every hour on that dyno costs $200, running or not. It's called tie up time.

[williamturner]

Hello Nick, this intake manifold was originally a Keith Black manifold that was designed for boat racing.
But it is a mystery that they kept the exhaust heat provisions.
In an old "Mopar Performance" issue they did a very short article on this manifold.
If my memory serves me correct their is another article that is on Google where the owner of a Hemi car had problems with fuel distribution, with this manifold.
He ended up going to a different manifold and the problem went away.

[robertbennett]

It's been sitting for three years says everything, never even fired up in three years, everything dries up, specially those big ass carbs, street bikes, motorcycles do the same thing everything dries up, hoses, fuel lines, my sons Honda sat for five years and I knew, so we just replaced everything, a 572 hemi that's a monster I love it, Nick will do his magic and I can't wait to see it when he's done

[chrisbaughman]

In my opinion it looks like someone took it apart tried to fix whatever was wrong with it even though they had no idea how to fix it got frustrated and said screw this ill sell it on Facebook marketplace for whatever i can get for it. Most mechanics with a dyno would find out it was from Facebook marketplace and not even touch it. I like how nick gives anything a fair chance looks like an old fashioned dyno party love when nick gets on the dyno. I'd be concerned about what the inside of that engine looked like nick mentioned the spark plugs where not only the wrong ones but wet if it's wet due to any water the cylinder walls could be full of rust and need to be honed out and the camshaft could be warped or have flat spots definitely needs to be gone through by the owner

[pedricktownperformance]

I only use alcohol rebuild kits for gas carburetors anymore. The green accelerator pump diaphragms hold up a lot better to pump gas

[joeljenkins]

Yes!!! I remember (I HOPE I'm not butchering his name) meeting Gétan at Carlisle last month, along with all the fantastic guys who accompanied Nick there. And yes, Gétan's 70 Roadrunner is a SWEET piece!! Great week, guys!!!

[capicolaspicy]

I can't believe how much you assumed things were right after finding the first two errors! I would have questioned the cam and timing areas, that's the only thing that will shoot sparks out the carbs and the exhausts! Sparkles going to the wrong cylinder and/or at the wrong time! And then the 2nd time you eyeball the distro you see it is 180 They could have changed that distro BEFORE it went to weren't there, therefore we DON'T know. Can't count how many times I've had an engine sitting for year, outdoors even, and both fuel and carb accelerator pumps had dried out diaphragms. Dump some fuel in the output side of fuel pump and in the accel pumps and literally about18 out of 20 would awaken and work fine.