stack temps
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Cargo Master
Joined: Apr 2006
Posts: 2,153
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From: Concord NC
stack temps
hey guys I have a ?,you guys that run stacks does the temp of the stacks get pretty high. I am going to install my new 6" mitre cuts this weekend but I also carry a 110 gal offroad diesel tank and lift pump in the front of the bed. will I be OK to leave the tank where it is or will the temps be high enough to be dangerous. thanks for any input
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
good idea. i would at least put some fire-retardant material between the tank and the stacks to prevent any heat from getting in. after my next drive, let me get some temps for you. i have a infared temp gun from my RC career that i will use..
however let me say that the chrome part is too hot too touch. i have some friends with burnt fingertips who put some finger prints on my stacks. it only took them once to learn, i still havent, though.
however let me say that the chrome part is too hot too touch. i have some friends with burnt fingertips who put some finger prints on my stacks. it only took them once to learn, i still havent, though.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
I wondered about stack temps, but mine don't seem to get too hot. I've got some plastic caps on the bedrails that my stacks are no more than 1/8" away from. I've been checking them, but they have not once shown any signs of melting. I'm pretty sure they would melt before they reached the flash point of diesel fuel, but some heat shielding can't hurt. I'll be curious to see what Kris finds with his temp gun.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I'm curious too, but let's be for real. Diesel is not that flammable with a lower flash point than other fuels. Second, If that is a metal tank with a large surface area, and plenty of fuel, I'm thinking no problem. The only issue I can see is with a lower fuel level and vapors. Even then, I've thrown lit matches into diesel fuel and they went out. This in the desert. A word of caution, this does not apply to vapors in an enclosed fuel tank though. A definite unknown there but I think it would be OK.
Posting Guru
Joined: Aug 2005
Posts: 1,768
Likes: 1
From: Central Alabama
I have stack mounts that actually sit on the plastic bed rail and no melting. I also have a sprayed tool box exactly 2 inches from the stacks and no melting. I do agree with Strokin, for piece-of-mind I would fab some kind of heat shield or consider a stick-on heat barrier for that tank.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
today after a 30 minute drive with intermittent sustained temps of 800* pre-turbo coming home (in the last 5 minutes) i pulled in the driveway and hopped up on the toolbox. EGT in the vicinity of 500* and falling.
area where the pipe splits in the bed- 275*F
left side before the 90* upward turn- 203*F
right side before the 90* upward turn- 240*F
inside the tip of both stacks- 139-145*F.
tried to take a measurement on the chrome part outside, but it just reflected the beam off and took a reading of the temp gun. it only said 85-100* so i was pretty amazed at how low it was, so i touched it, and no, it was not reading actual temp!
area where the pipe splits in the bed- 275*F
left side before the 90* upward turn- 203*F
right side before the 90* upward turn- 240*F
inside the tip of both stacks- 139-145*F.
tried to take a measurement on the chrome part outside, but it just reflected the beam off and took a reading of the temp gun. it only said 85-100* so i was pretty amazed at how low it was, so i touched it, and no, it was not reading actual temp!
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Cargo Master
Joined: Apr 2006
Posts: 2,153
Likes: 0
From: Concord NC
thanks guys that makes me feel better. i don't feel as though those temps will give me any trouble the fuel cell is 14 guage steel so the fuel temp probably will not even be affected thanks again for all the input. I will have to post some pics after this weekend
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Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
remember that is at idle cooling down. factor in 1200* (i cant really get my truck that hot without putting a trailer on it) and the temp near the cell will probably be in excess of 650*. put some heat wrapping on the tank to make me happy.
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Logistics Pro
Joined: Mar 2004
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I don't think the diesel fuel tank should be of any concern. There's really no way it's going to ignite being a.in a metal tank, b.uncompressed, c.it just ain't gonna ignite. 
Try pouring a bit of diesel on the ground and hold a match or lighter to it.
I'd be more worried about carrying something plastic in the bed and having it end up against the stacks and melting... guess that's something I'll have to address for if I ever add stacks. I've seen some guys with some diamond plate shielding over the in-bed part that looked pretty good.
Try pouring a bit of diesel on the ground and hold a match or lighter to it.
I'd be more worried about carrying something plastic in the bed and having it end up against the stacks and melting... guess that's something I'll have to address for if I ever add stacks. I've seen some guys with some diamond plate shielding over the in-bed part that looked pretty good.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Originally Posted by strokin_it7.3
MBRP sells that diamondplate thingie. probably near $400... 
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