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Covalt - 85 Race Truck
https://slantsix.org/forum/viewtopic.php?f=6&t=56667
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Author:  Joshie225 [ Thu Apr 28, 2016 6:07 pm ]
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Good deal! I ran my '79 D100 long bed across the scale at work today and it read 3880 lbs with me on board. My truck has the A833OD and and 8.25.

Author:  Rick Covalt [ Sat Apr 30, 2016 3:13 pm ]
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Gave the truck an oil change and went back to 10/30 oil. I forgot that the truck takes over 6 quarts of oil to fill her up.

Set the timing back from 12 BTDC and 32 total to 10 BTDC and 30 total. It ran great but had a slight ping at WOT. I hope that eliminates it. If not I'll go to 8 BTDC.

I pulled a couple plugs and they looked just like this. Just a light brown. Hard to see on the picture but the insulator is the same color as the tip. This is not to light is it? Sorry, no A/F gauge yet. This is after @ 800 miles of driving with numerous wide open blasts.

Image

Author:  slantzilla [ Sat Apr 30, 2016 4:37 pm ]
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Honestly, reading plugs on a street car is pretty much a waste of time. All you are really seeing is mixture at idle. From what you describe it sounds lean. :D

Author:  Dart270 [ Sun May 01, 2016 7:59 am ]
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If you don't see little speckles of metal, then you are most likely safe. Hard to say if rich/lean with mixed driving, as Dennis says. If no WB-O2, then 1/4 mile passes (with backups) and a jet/rod change and more passes will tell you if it's rich or lean (at WOT).

Lou

Author:  Rick Covalt [ Sun May 15, 2016 6:59 pm ]
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Race truck made it's debut as a tow rig and at the drag strip today.

It towed flawlessly and with much more power it handled the hills great. It was a lot nicer to drive not having to get a big run on every little grade.

Micah (my son) raced it all day and pretty much babied it off the line but it ran great and knocked off a 17.55 @ 76 mph. Not bad at all for a flying brick with my mild build. With some carb tuning and a fearless driver like me :lol: it should run some 17.30-40. That is a drop of almost 2 seconds in ET form stock if memory serves me correct.

Also sold the black truck at the races today, so this truck is now my only truck! :lol:

Author:  Rick Covalt [ Fri May 20, 2016 6:17 am ]
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Also forgot to mention, that on Friday afternoon when I towed to the track with it for the first time, I also checked the temperature of the external transmission cooler. Greg Ondayko came over with his infared heat gun as soon as I got there and the temperature was 175-180F. Some folks were saying they might not cool enough, but that seems fine to me. May need to check it on a 100 degree day too. But for now I think I'm good.

Rick

Author:  Dart270 [ Fri May 20, 2016 7:30 am ]
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Sounds great, Rick. Actually, I don't think you want to run the trans much colder than that for best wear and performance.

Lou

Author:  slantzilla [ Fri May 20, 2016 8:58 am ]
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Fluid temp of 180 would be right where you want. :D

Author:  Rick Covalt [ Fri May 20, 2016 3:58 pm ]
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Thanks guys, that is what I was thinking. I am kind of excited about hitting the road in it to go to Bristol. I plan to put the 500 CFM boosters in it and some new metering rods and it should be ready to go 300 miles.

Rick

Author:  Rick Covalt [ Sat May 28, 2016 11:19 am ]
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I installed the 500 boosters into my 600 Edelbrock (Thanks Lou) a couple days ago, as well as going 2 steps leaner and the truck runs really great now. There was a soft spot when taking off under mild throttle that was completely eliminated. Seat of the pants feeI is just the same as before. I ran it about 65 miles of all local driving and I drove the speed limit the whole time. :lol: :lol: Mileage was 18.73. I know that is not enough miles to get a good check, but I was excited to see how it did. Next tank I will try and get a couple hundred miles on it before checking. I also went 2 steps leaner on the secondary side and left them hooked up.

I need to get another A/F gauge to really be able dial this in, but I am pretty happy. Going to have Ryan and Andrew Shank come over and give me a hand swapping in the 2.94 gears to cruise on down the highway to Bristol. Should be able to easily get 20 MPG.

While the rear is out I am going to swap the 11X3" brakes that are on my race car onto the truck which has 10X2 1/2" brakes.More to come. :lol: :lol:

Author:  Dart270 [ Sun May 29, 2016 5:17 am ]
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Nice progress!

Lou

Author:  Rick Covalt [ Wed Jun 15, 2016 4:02 pm ]
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Just got done my 2.76 (Thought they were 2.94's) gear swap for the ride to Bristol. Pretty sure I lost a full second off my quarter mile time, and all of it in the first 60 feet! :lol: :lol: Cruises nice though and mileage should be good.

Rick

Author:  Rick Covalt [ Sun Jun 26, 2016 1:29 pm ]
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Truck ran flawless on the way to Bristol on Friday. I filled up just before I hit the Interstate and ran 67-70MPH for about 380 miles. Mileage on the first fill up was 19.7.

I made 8 passes over the weekend and the best time was a 19.22 @ 71MPH with most in the 19.40-50 range. So with the gear change to 2.76 I lost almost 2 seconds and 5 MPH. Some of that was the air and some of that was the altitude I'm sure.

I am also pretty sure that A/C is going to be in my future for the truck. It is just to hot to drive for 8 or 9 hours in the August heat! Maybe I am just getting soft. :lol: :lol:

Rick

Author:  slantzilla [ Sun Jun 26, 2016 2:32 pm ]
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No, driving without A/C sucks. :oops:

Author:  Rick Covalt [ Mon Jun 27, 2016 4:56 pm ]
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Yeah, Ron gave me some info on a very reasonably priced A/C system. Pretty sure that will be on order! :lol: :lol:

Ran another 380 miles and 2 fill ups on the way home from Bristol today and the truck got 20.39 and 21.89 MPG. Can't be complaining about that. I am really happy with that!

Rick

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