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Old 11-19-2019, 07:05 AM   #1476 (permalink)
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Old 11-21-2019, 04:54 PM   #1477 (permalink)
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Started on page one a few days ago and caught up last night. About lost it on the bed slat post. One skinny slat because math is hard lol.

On the air bags, the spring rate can be much more progressive than coils. There are quite a few variables to work with, but as said, adding some coolant to each bag would be a good start. From what I gather, your spring rate isn't ramping up quick enough to keep the dynamic force of all your weight off the bump stops. The liquid addition keeps your "piston" size the same while decreasing the internal volume so that the spring force raises quicker. Ping tanks do the opposite. My only concern is your suspension travel. If I remember right, you lost a little overall travel with the bags versus the coils and external bumps?

I don't remember what the exact front weight was and I'm guessing the bag kit was designed for a standard 450 cab that sees towing. 70 psi for ride height is not bad at all. The coolant trick is cheap and easy. If you need to remove the coolant, a flexible rubber or silicone hose on a shop vac makes it easy. Just leave a bit of an airway where you connect the hose to the vacuum so that you don't burn up your vacuum motor.

That's my $0.02 for now. Sweet progress on everything. I too love to see the truck in use as it gets built and pictures of the landscape and climbs are amazing.

Last edited by JNHEscher; 11-21-2019 at 04:54 PM.
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Old 11-21-2019, 05:52 PM   #1478 (permalink)
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Started on page one a few days ago and caught up last night. About lost it on the bed slat post. One skinny slat because math is hard lol.

On the air bags, the spring rate can be much more progressive than coils. There are quite a few variables to work with, but as said, adding some coolant to each bag would be a good start. From what I gather, your spring rate isn't ramping up quick enough to keep the dynamic force of all your weight off the bump stops. The liquid addition keeps your "piston" size the same while decreasing the internal volume so that the spring force raises quicker. Ping tanks do the opposite. My only concern is your suspension travel. If I remember right, you lost a little overall travel with the bags versus the coils and external bumps?

I don't remember what the exact front weight was and I'm guessing the bag kit was designed for a standard 450 cab that sees towing. 70 psi for ride height is not bad at all. The coolant trick is cheap and easy. If you need to remove the coolant, a flexible rubber or silicone hose on a shop vac makes it easy. Just leave a bit of an airway where you connect the hose to the vacuum so that you don't burn up your vacuum motor.

That's my $0.02 for now. Sweet progress on everything. I too love to see the truck in use as it gets built and pictures of the landscape and climbs are amazing.
Thanks for reading! I check yours whenever there is new posts

On the air bags, I "should" have more travel. Its a leveling kit, which should net 1-1.5" increase in height in the front. But I am only getting 2.5-3" uptravel before hitting bumps. Thats with zero PSI in them, the bumps may be a little taller and compressed a bit at that height.

On just highway I am not sure I am hitting them (not to full zero psi range anyway) off road yes.

I am reluctant to try to coolant as It seems like a bitch to get back out. Yes I can vac it out, but I want to try the ping tanks. I have all the parts, just need time and daylight....

Yes likely designed for a lighter front end. I am at 6200lbs, and about to add a couple hundred more with the bumper..... Running right about 75spi most of the time it seems.

And yes math is hard sometimes!!!!
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Last edited by Java; 11-21-2019 at 05:52 PM.
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Old 11-21-2019, 07:02 PM   #1479 (permalink)
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I think I gotcha.

The kit is supposed to level the front with rear because trucks with a tow package sit higher in the rear to compensate for tongue weight. You're sitting at your desired/leveled ride height in front at 75 psi, though? I was looking at the spring rate graph and think I saw you say that the theoretical pressure would be more like 90 which looks right to me. I'm starting to wonder if the bag mounts aren't the correct height. As much trouble as you had with the leaf springs, I wouldn't dismiss the idea lol.

I know that any given vehicle won't see nearly as much range of suspension motion on the highway as it would on uneven roads. 2.5-3" up does sound rather short for the amount of downforce the weight of your truck applies when it drops into a pothole or any such dip. That and higher bag pressure would ramp up the spring rate quicker as it were compressed to resist bottoming out much more. You could have so much weight that the front is still moving downward as your axle is being forced back up as it lifts out of a hole - even at slow speeds. Haven't seen your truck in motion so that's just an image in my head.

Off topic - I was surprised to see that your truck is as tall as our bus when it's aired up. This gives me bad ideas lol.
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Old 11-21-2019, 07:06 PM   #1480 (permalink)
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I think I gotcha.

The kit is supposed to level the front with rear because trucks with a tow package sit higher in the rear to compensate for tongue weight. You're sitting at your desired/leveled ride height in front at 75 psi, though? I was looking at the spring rate graph and think I saw you say that the theoretical pressure would be more like 90 which looks right to me. I'm starting to wonder if the bag mounts aren't the correct height. As much trouble as you had with the leaf springs, I wouldn't dismiss the idea lol.

I know that any given vehicle won't see nearly as much range of suspension motion on the highway as it would on uneven roads. 2.5-3" up does sound rather short for the amount of downforce the weight of your truck applies when it drops into a pothole or any such dip. That and higher bag pressure would ramp up the spring rate quicker as it were compressed to resist bottoming out much more. You could have so much weight that the front is still moving downward as your axle is being forced back up as it lifts out of a hole - even at slow speeds. Haven't seen your truck in motion so that's just an image in my head.

Off topic - I was surprised to see that your truck is as tall as our bus when it's aired up. This gives me bad ideas lol.
75psi gives me their recommended minimum bag height. More pressure does not make the ride any better....

Kelderman actually was extremely nice, and gave me their CAD files for the mounts, I do believe these are the correct ones for the leveling kit. It did bring the front up for sure. I was debating making shorter mounts and running more pressure to compensate.

I dont think its the bottoming honestly. I think its just too much spring rate? But I am no expert by any means. Also compounded by H load range tires, they are not going to move much to absorb the fast small impacts.

Yes its tall..... I have a 7'6 ish inside!

EDIT: I am leaning towards no front winch..... Talk me out of it guys. Rear only.....
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Old 11-21-2019, 07:39 PM   #1481 (permalink)
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Yeah, if you're going to have one winch, a rear one is the way to go. On a truck that big and heavy, if you get stuck, you definitely want to go out the way you went in.
A rear winch also will match the style of off-roading you do better than a front winch.

Of course, the best option would be to put that 25,000 lb monster in the back, and a 15,000 lb or so in the front. We've run a 12K on the front of our F550 auto extrication/rescue truck and it is enough.
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Old 11-21-2019, 07:41 PM   #1482 (permalink)
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Yeah, if you're going to have one winch, a rear one is the way to go. On a truck that big and heavy, if you get stuck, you definitely want to go out the way you went in.

A rear winch also will match the style of off-roading you do better than a front winch.



Of course, the best option would be to put that 25,000 lb monster in the back, and a 15,000 lb or so in the front. We've run a 12K on the front of our F550 auto extrication/rescue truck and it is enough.

Remember, you asked!
Yeah I am drooling on the 25k For the back... It just almost seems silly not to put something in the front....

I'm definitely in the backward is best if I'm really stuck. Just thinking if I catch the front in a ditch or something a light winch in the front might be handy to just get back on the road quick

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Old 11-21-2019, 07:52 PM   #1483 (permalink)
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Agree on the rear winch. I've seen a few and helped on a couple trucks with front winches that were plowed nose first into a ditch. Front winch doesn't help ya much when it's buried in the dirt with the weight of the truck on it. As life goes, we'll all concur on a rear winch and the first time you need it will be at the front. But in all practicality, you're headed front first into everything most times.

Curious to see your findings on the air ride. Kelderman is really good so no doubt about their products.
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Old 11-22-2019, 08:40 AM   #1484 (permalink)
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Agree on the rear winch. I've seen a few and helped on a couple trucks with front winches that were plowed nose first into a ditch. Front winch doesn't help ya much when it's buried in the dirt with the weight of the truck on it. As life goes, we'll all concur on a rear winch and the first time you need it will be at the front. But in all practicality, you're headed front first into everything most times.

Curious to see your findings on the air ride. Kelderman is really good so no doubt about their products.
Yeah I am thinking rear first now..... We will see when that materializes. I found out I have a friend with access to a rather large brake so I can get a mount bent up easily now.

Yeah I dont quite know where to go with the air ride. I will try ping tanks, and anti freeze if the tanks dont help. Then I am tempted to rip it all fucking back out and get coils made. Its only a few hours work to go back to coils.....
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Old 11-25-2019, 08:43 AM   #1485 (permalink)
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Grrrr Moisture inside. Cant find the leak..... Maybe windshield. Pulled headliner as the marker lights seem to be a common one, all good there.

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Old 11-25-2019, 10:21 AM   #1486 (permalink)
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Grrrr Moisture inside. Cant find the leak..... Maybe windshield. Pulled headliner as the marker lights seem to be a common one, all good there.

Any chance that its from wet carpets caused by snow melting off of your gear?

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Old 11-25-2019, 10:23 AM   #1487 (permalink)
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Any chance that its from wet carpets caused by snow melting off of your gear?

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Nope, truck has been in the driveway for the last two weeks
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Old 11-25-2019, 10:26 AM   #1488 (permalink)
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Grrrr Moisture inside. Cant find the leak..... Maybe windshield. Pulled headliner as the marker lights seem to be a common one, all good there.

on early superdyty(99-) there was common leak in the corners of the windshields , not enough adhesive

it leaks down the pillar and drip right onto fuse block/GEM module

i found the leak by having the pillar cover off


might be worth to look there
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Old 11-25-2019, 10:28 AM   #1489 (permalink)
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on early superdyty(99-) there was common leak in the corners of the windshields , not enough adhesive

it leaks down the pillar and drip right onto fuse block/GEM module

i found the leak by having the pillar cover off


might be worth to look there
Ill pull them.... Worth looking. This must be dripping on something in the stereo/sound wiring. The speakers make funny static whenever it rains now....

I cant find any obvious wet spots tho.
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Old 11-25-2019, 10:58 AM   #1490 (permalink)
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truck has been in the driveway for the last two weeks
say it isnt so!!
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Old 11-25-2019, 12:57 PM   #1491 (permalink)
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say it isnt so!!
Yep..... Been busy with shit around the house/kids bdays etc. But I got the other project moving under its own power this weekend. First "drive" since 1982.

I dont fawking remember how to make YT work. Click

https://youtu.be/0B52BC4yN1U

https://www.youtube.com/embed/0B52BC4yN1U">https://www.youtube.com/embed/0B52BC4yN1U" type="application/x-shockwave-flash" wmode="transparent" width="425" height="344">
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Old 11-25-2019, 01:44 PM   #1492 (permalink)
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New light arrived. I knew it was going to be close, 30" bar, but I couldn't find and good specs on the bar with brackets. Buuuut its REALLY tight. Light I cant bolt the brackets on tight. I may be able to mount it behind the uprights, but I need to get the bumper on and check grill clearance.

If anyone has any good ideas LMK.

That is with it tight to the other side.


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Old 11-25-2019, 02:01 PM   #1493 (permalink)
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Can you access the backside of the vertical plate on bumper next to the light? If so you could drill a hole and cut a slot for the adjustment directly into that and then run a spacer to make up the gap there and use bolts inside bumper. Would be a bitch to adjust and everything else about it but would work.
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Old 11-25-2019, 02:05 PM   #1494 (permalink)
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Can you access the backside of the vertical plate on bumper next to the light? If so you could drill a hole and cut a slot for the adjustment directly into that and then run a spacer to make up the gap there and use bolts inside bumper. Would be a bitch to adjust and everything else about it but would work.
Nope..... All welded closed. I am tempted to to drill thru both sides of the upright, but would no have any adjustment that way....
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Old 11-25-2019, 02:23 PM   #1495 (permalink)
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Make a bracket that uses the 4 bolts that hold the end of the light on. Then have that bracket go down and bend inward so you can have a hole and slot in that to match to a tab that bolts to bumper. Would space the light up a bit and be a pain to build but only way i can see it done. Unless you can somehow clamp a bracket to the housing or around the housing as well.
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Old 11-25-2019, 02:26 PM   #1496 (permalink)
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Make a bracket that uses the 4 bolts that hold the end of the light on. Then have that bracket go down and bend inward so you can have a hole and slot in that to match to a tab that bolts to bumper. Would space the light up a bit and be a pain to build but only way i can see it done. Unless you can somehow clamp a bracket to the housing or around the housing as well.
Interesting idea. I had not thought of using the end cap bolts. Will investigate!
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Old 11-25-2019, 02:55 PM   #1497 (permalink)
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nutserts in the vertical grill guard piece, angle iron bracket to the bottom of light, done.
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Old 11-25-2019, 02:57 PM   #1498 (permalink)
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nutserts in the vertical grill guard piece, angle iron bracket to the bottom of light, done.
How do you attach to the bottom of the light?

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Old 11-26-2019, 06:50 AM   #1499 (permalink)
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get a narrower light
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Old 11-26-2019, 07:01 AM   #1500 (permalink)
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get a narrower light
Stop that.

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