'89 R3500 Crew Cab 2wd to 4wd conversion & beyond

[folkenheath]

For the people that like the nerdy math side of things here's why I think the shroud will help.

I have (2) 16" fans which total 402 sq-in area pulling air though the radiator. With the shroud, the fans will pull air through the entire radiator which is 655 sq-in. The fans by themselves were only pulling air across 61% of the radiator.

Not only that but it's pulling it all through the fins, which create a pressure drop vs open airflow. If you are pulling through more area of fins it lessens the pressure drop and allows the fan to flow more air. So you not only get a significant increase in airflow area, but you also get a little increase in airflow at the same time.

 

[mrk5]

Not only that but it's pulling it all through the fins, which create a pressure drop vs open airflow. If you are pulling through more area of fins it lessens the pressure drop and allows the fan to flow more air. So you not only get a significant increase in airflow area, but you also get a little increase in airflow at the same time.

I'm glad you mentioned that. I was thinking along similar lines but thought maybe I was making it up.

 

[mrk5]

I've always liked the KC Daylighter logo. I have little KC "Flex Era" lights but they aren't Daylighters so being a sticker nerd I made my own. They are even translucent so they will allow the light through.

 

[mrk5]

Last thing before our next trip, I added a simple bracket to the intake.

 

[imiceman44]

Last thing before our next trip, I added a simple bracket to the intake.

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That's good enough for the one trip but long term this will stress the hose clamp and destroy it.

 

[mrk5]

Overall the fan shroud is working great on our weekend trip. However, the foam rubber seals did not hold up. They ended up getting sucked into the fans due to heat softening the adhesive. All that said, it made a very noticeable improvement. And I didn't lose any highway cooling.

 

[mrk5]

We made my RTI ramp into a trailer so I can take it to the local club's meet and greets. I was interested to see I can't go as far up the ramp with the shorter wheelbase. I'd have to do some searching to see what my old distance actually was because I may actually "score" better even if I'm not traveling as far. Which I think the RTI ramp is an interesting lesson in relativeness. In the end I think it just matters how far up the ramp you can go regardless of wheelbase because that's a measure of how tall of an obstacle you can climb.

Anyway, here's a short video. I was in 2 wheel drive and I had to put the rear locker on to get as far as I could.

 

[mrk5]

I did a thing.











Anyone need some used 40s?

 

[r3dd0g]

Now you get to break new and exciting parts!

 

[kgblazerfive]

Anyone need some used 40s?

How much ?
I need some run around town so I won't wear down my 42's tires.

 

[Babaganoosh]

All you guys going bigger and I’m still stuck on 35’s

 

[HankScorpio]

I did a thing.

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Anyone need some used 40s?

I'm jealous, those look great. I might be interested in those 40's. I want to see how 40's fit my truck without pulling the trigger on a brand new set.

 

[mrk5]

Now you get to break new and exciting parts!

How much ?
I need some run around town so I won't wear down my 42's tires.

I'm jealous, those look great. I might be interested in those 40's. I want to see how 40's fit my truck without pulling the trigger on a brand new set.

I'm hoping to get $500. A little less than 50% tread left. They're 5 years old. Obviously they've seen their fair share of rocks. If I had kept them longer I was going to flip them to run the other side out. I had them balanced with 16oz of beads and had no issue running up to 80mph on the interstate. I've been really impressed with the Nitto's which is why I got another set.

 

[mrk5]

All you guys going bigger and I’m still stuck on 35’s

Seemed like everyone is going to 42's now so I had to jump on the bandwagon.

 

[r3dd0g]

I'm hoping to get $500. A little less than 50% tread left. They're 5 years old. Obviously they've seen their fair share of rocks. If I had kept them longer I was going to flip them to run the other side out. I had them balanced with 16oz of beads and had no issue running up to 80mph on the interstate. I've been really impressed with the Nitto's which is why I got another set.

Nitto Trail Grapplers are the bomb. I run 37s on the S-10 and the Silverado, I don't even bother balancing them and they run fine at 80, even on the Trail Ready beadlocks.

 

[Babaganoosh]

Nitto Trail Grapplers are the bomb. I run 37s on the S-10 and the Silverado, I don't even bother balancing them and they run fine at 80, even on the Trail Ready beadlocks.

The daily is going to need tires soon and I'm contemplating doing these or the ridge grapplers.

 

[mrk5]

The daily is going to need tires soon and I'm contemplating doing these or the ridge grapplers.

We ran the terra grapplers on the Super Duty we used to own and they were nice tires.

 

[Babaganoosh]

We ran the terra grapplers on the Super Duty we used to own and they were nice tires.

Opps, I thought that was what Brent said. I was reading to fast.

 

[rderosier]

I did a thing.

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Anyone need some used 40s?

Any trimming needed?

 

[mrk5]

Any trimming needed?

It might. I'll run up the ramp this weekend. Tomorrow I've got a 4th of July parade to drive in.