me to,, this is an engine that I built up as a short block in June of 2018,,

I believe that I have waited ling enough...

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Getting the slant motor that I call the HiNA going, it starts and runs but the AF meter shows full lean and the sparkplugs show rich.
I was thinking that I had an exhaust leak that was fooling the AF sensor-meter and as I had the sensor in one of the Hooker Long Tube collectors, it was only seeing three of the six cylinders, figured this was the time to build a good exhaust system that addressed all the issues.
See photos.
I added woven flex pipes to allow the motor and the exhaust to move independently. This will allow maintaining the sealing of the headers to the cylinder head and add to the working life of all the exhaust seals.
Also moved the AF sensor down stream to the Y collector to allow the sensor to see both exhaust streams.
Brought the exhaust exit out just in front of the driver side rear tire, a tribute to what my Dad did on his vehicles and the AAR Cuda's

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Yep, that is classic exhaust leak behavior for the AFR sensor. Hope that new exhaust works for you.

Lou

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Home of Slant6-powered fun machines since 1988

The new and better sealed exhaust system did not change the AF gauge from showing full lean. I got on the phone with the AEM Tech line.
They had me power up the gauge with out starting the motor, the gauge showed 14.7, then after about 20 seconds went full lean. Per AEM that
is good and shows that the gauge it self is functioning. They then asked that I do the 'rag test' basically remove the AF sensor from the exhaust section, wet a cloth with gasoline
and wrap the sensor with it. I did that. The gauge continued to show full lean, although the sensor did warm to where I could feel the heat.
Per the AEM Tech, the sensor warming was further evidence that the gauge itself was functioning but the fact that the gauge continued to show full lean is good evidence
that the AF sensor had failed. I installed a new replacement AF sensor and the all is good. The AF sensor is responding in a predictable way that will allow me to begin the tuning
and to finish the car.

Here is a video
https://www.youtube.com/watch?v=cfkw2ISgW-g

Prior to the video I probably had about 45 minutes of run time on the engine, maybe 5 starts from a cold engine ran to where it ran to normal operating temperature. That includes the initial cam break in and trouble shooting going through the MS3Pro setting trying to figure out why the AF gauge was showing full lean while the sparkplugs were showing a rich condition.

More good news is zero leaks, no oil, no water, nothing,, that's nice!

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

started and warmed the motor today,
used the MS Trigger Wizard to lock in the distributor timing
and also re lashed the valves, after that
did a cranking compression test:
#1 185
#2 180
#3 175
#4 175
#5 180
#6 180

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Gorgeous sounds, Mr. Truck. That is an excellent place to be with cranking compression for running on premium fuel. My 62 has 185-195 and it is a bit on the edge with 93. Sometimes diesels when I shut it off.

Lou

_________________
Home of Slant6-powered fun machines since 1988

Thanks

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Between: being retired, hanging with grand kids, playing golf and just generally having fun, still find the time to work on the 68 Barracuda.
Today finished the cold air intake.
I have gone through several cold and hot starts on the new engine and have started doing the MS3 tuning process. Its all still good.
The motor fires good, no leaks. The AF - VE responses to setting changes are predictable.
Looking forward to 2021.

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Looks good John!

_________________
Official Cookie and Mater Tormentor.

Mounted the GlasTek hood. Used a set of low tension springs from a FABO seller. The springs are a perfect fit to the weight of the hood. I am pleased with how well this has gone. I have a hood pin set and will install those after the final panel alignment.

https://www.forabodiesonly.com/mopar/th ... 1973177598

I have also fine tuned the revised front end look and functional alignment. I am going after the 69 Charger 500 flush head light appearance. I will retain the split grill of the 2nd generation Barracuda, with one of my goals being that the changes allow the OE grills to be re installed

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Nice work, John.
Lou

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Home of Slant6-powered fun machines since 1988

I see the look that you're going for, with the split grill it looks like maybe a 3/4 scale version of my kid's 72 fury with the hideaway headlite doors open
Now if y could engineer in the hideaways that would be something......... Just an idea.
Oh yeah the 68/9 chargers (other than the "500"s) had em too

Looks good John!

_________________
Official Cookie and Mater Tormentor.

Very nice indeed!

John, What cam did you decide to go with? If it is not a secret!

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

it is Oregon grind #1456. I called Ken at Oregon and gave him the cam duration and lift parameters that I wanted and that I also wanted a cam profile that utilized the large Mopar lifter diameter.
and that is what he came back with. Per Ken the 1456 was developed for a Ford circle track motor and it is stated on the profile sheets that cam requires a .875 or larger lifter.

advertised duration is I 329 E 338
duration at .050 is I 254 E 258
LSA 108
lift at valve 1.5 rockers I .560 E .567

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8