Bought, wrecked, rebuilding a 2009 LMM

[malibu795]

Well got it home, of the 5 315/70/17 on H2.. 2 have now thrown belts.
So pulled the 305/70/17 on 17*9 soft 8 off my suburban and stuck them on the truck. Also re-installed the ride quality weight... Out os curiosity, found ~1750lb squats the truck 2.5".

Got the OEM bed liner out, all the major big dirt washed off.. it's not high desert clean, for for something that's spent a lot of time around rust belts it's above avg.


He gave essentially what looks like 2-#4s going to shop around see if I can find some #6s before I eat the LMC premium

 

[1FastBrick]

and to think we throw away nicer stuff then that here because it has a dent or a crease in it...

 

[malibu795]

and to think we throw away nicer stuff then that here because it has a dent or a crease in it...

Oh I know,

 

[Stroked06Goat]

I been on a hunt myself for a box so i feel the pain. Picked up a completely rust free Oklahoma box with some dents (was told was a pipe/fence truck) but a 2016 (for my 2002 build). thing is pristine outside he dents. Got it on and decided i wanted a period correct. Barely a bite for 450 around here which shocks me. (i'm in rust belt too). but man a rust free mid 2000s they try to bring 2k for them.

 

[malibu795]

I been on a hunt myself for a box so i feel the pain. Picked up a completely rust free Oklahoma box with some dents (was told was a pipe/fence truck) but a 2016 (for my 2002 build). thing is pristine outside he dents. Got it on and decided i wanted a period correct. Barely a bite for 450 around here which shocks me. (i'm in rust belt too). but man a rust free mid 2000s they try to bring 2k for them.
View attachment 131698

Clean 8' bed are roughly dime a dozen it seams like up here. Really wanted a long bed but wasn't an option when I bought this one

 

[lutzjk]

I think I paid 1500 for mine back pre covid

8’ takeoff box.

 

[malibu795]

Well seams fan clutch is dieing, AC is auto going into re circ at idle, radiator, CAC, condenser where all cleaned before install.. grabbed one of my solid hubs, installed it on a spare blade, then quickly realized it's not a quick swap..

Also if anyone wonders how loud it is.. clip of my dually with 4088, straight 4", cam and oval pistons

Source: https://youtu.be/xoY3WxQoi6E?feature=shared

 

[2004LB7]

Is that thumping or pulsing sound from the fan?

 

[malibu795]

Is that thumping or pulsing sound from the fan?

More like the exhaust note change with ovals and a cam

 

[darkness]

That’s not too bad. My Kodiak’s fan screams with the solid hub. Fiberglass hood and no real engine bay sealing doesn’t help.

 

[NC-smokinlmm]

Why can’t you use the electric fan kits we use on LS builds? They are so quiet you almost can’t hear them run. My truck has zero problems staying cool and I tow heavy boats with it regularly in 95 degree temps. I think they help bc in traffic they still move some air.

 

[2004LB7]

Why can’t you use the electric fan kits we use on LS builds? They are so quiet you almost can’t hear them run. My truck has zero problems staying cool and I tow heavy boats with it regularly in 95 degree temps. I think they help bc in traffic they still move some air.

Your probably in the minority with this. It's understood that electric fans kinda limit you to about 10k lbsand possibly less in hot weather or going up grades. When your going down the highway with a lower height load with lots of air over the radiator, you're not likely to overheat.

But, when you have a large camper or wind load and climbing up a grade or stop and go traffic you might struggle with keeping the temps down

 

[malibu795]

Why can’t you use the electric fan kits we use on LS builds? They are so quiet you almost can’t hear them run. My truck has zero problems staying cool and I tow heavy boats with it regularly in 95 degree temps. I think they help bc in traffic they still move some air.

Jason's on point especially with the route I'm heading.
Electric fans have their place. And they work great for what they are.
Boat weights is kinda outside my wheelhouse.. what do you consider a heavy boat?

I've already had 20-21,000lb trailer behind this truck
My 30" GN is 7100lb empty

 

[1FastBrick]

Heavy boat...

 

[malibu795]

IDK how accurate the number is, I know 10,000cfm is what the flow rate at 3000rpm? Seams to be going number.. I know the fan is over driven in relationship to crank speed.. gues I'll check that when I get home.for the fan to crank ratio

 

[2004LB7]

IDK how accurate the number is, I know 10,000cfm is what the flow rate at 3000rpm? Seams to be going number.. I know the fan is over driven in relationship to crank speed.. gues I'll check that when I get home.for the fan to crank ratio

I thought it was 2-3x that amount when the clutch is fully locked and running at 3k rpms

 

[malibu795]

I thought it was 2-3x that amount when the clutch is fully locked and running at 3k rpms

What was 2-3x? CFM rating?.

 

[2004LB7]

What was 2-3x? CFM rating?.

2-3x your 10k cfm you think it is/was

I thought I remember it being something like 25k CFM. Took around 20 HP equivalent from the engine to power it at that CFM level

 

[2004LB7]

Interesting discussion on the CFM of the fans. Numbers are all over the place. But maybe enough information to get an idea of electric vs mechanical

Cooling fan CFM specs & Vairable pitch option

As always, if a moderator feels relocating this thread is best, please do so- I just guessed at this section. I am wondering if anyone has any CFM specs on any of the fans used from gmt400, Hummer/hmmwv or duramax fan. I vaguely recall @WarWagon throwing out a number or two in the past but...

www.thetruckstop.us

 

[malibu795]

Well my tism is tickling..
I've got spare fan and hub mount, I've got a Honda 630 V-2 which is ~20hp with a 3600rpm gov. Roughly Duplicate the radiator should
What I don't have is the means to make a hub to mount on the shaft and mount a BBC 6 Rib crank pulley to it..

Source: https://youtu.be/Jv1t8d0QOUM?feature=shared