6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
In the new issue of diesel power they did an article on the fabtech 6.4 truck. That truck didn't have those stupid looking exhaust tips on it. Doesn't ford say that you have to leave those on there.
My 2 cents.... If the diffusers are in place and free of mud or debris and someone, God forbid, gets burned, it is Fords problem.... If they are in place and plugged with mud or what-have-you, I still have some mitigating circumstances....
If the diffusers are removed or modified, someone is going to be wide open to some sort of litigation.
I am still unclear as to how they really work...I got a look at em up close a couple of night ago at a car show...looks like its just a perforated tip [img]/ubbthreads/images/graemlins/shrug.gif[/img]
The difusers don't look like space aged technology or anything so why can't they just make bigger exhaust tips with difusers built into them, I'm sure one of the big aftermarket companies will figure something out (not saying it won't void the warranty) but it might satisfy the EPA side of things.
Just by the look of that truck in diesel power I don't think they care too much what ford says [img]/ubbthreads/images/graemlins/smile.gif[/img] that warranty died many turns of the wrench ago.
__________________
2001 F350 extcab 4x4 (My truck is slow)
The diffusers aren't for the EPA..... they are there so someone doesn't sue someones pants off....
During an active regen, the exit temp of the DPF, we are told, gets extremely hot. As the exhaust gasses pass by the diffuser ports, cool air is drawn into the exhaust to mix with it and cool it to a more reasonable temperature.
Since none of us has any real experience with these, as yet, we can only defer to the engineers warnings.
I would have to agree those things look pretty dumb. The tailpipe on the new Duramax LMM is also a weird but basically only has a slight bellshaped flare at the end. The new 6.7L Cummins in the chassis cab Dodges just has a straight 4" tailpipe. All these motors have the same emissions equipment and undergo the same regeneration cycles. It's just funny why the 6.4L has to have something that ugly to do it.
__________________ 02' F250 SWB CC 4x4 Lariat 7.3/Auto 2-Tone Grey/Black, Stainless Nerfs, Westin Grill & Stainless Brush Guard, KC Highlighters, 285/16 BF Goodrich AT/KO's on American Racing Rims. TRI light bar on rear, Silverstars, High 5 Cab lights, InTank / PrePump Mods, Prodigy, C-bet'r mirrors & 18K REESE Signature slider.
70' Stang Fastback 351W - Auto / White deluxe interior /Fold down rear Pics 00' Chrysler Town & Country Limited AWD 03' Cougar 281 EFS with all the fixins.. 06' Kubota BX2350 FEL, 60"MMM
Take a look at your wrist, see the that's right there's a little FORD Blue blood in all of us... Even the JAP Diesel lovers....
Since these are just on the tips, it seems they'd only be cooling the exhaust that's coming out at the tip (as in, someone walks up to the pipe and holds their hand in front of it... the tips are designed to cool the exhaust at this point). I'll put my hand in front of mine and and it's warm but not hot, but I guess the new particulate burning emissions thing in the exhuast pipe gets the exhaust going out the tailpipe extra hot, and that is the concern.
What I don't quite get is, it seems that unless someone is running really fast alongside your truck while holding their hand right in front of the tailpipe, that the only oppportunity for someone to get burned is while the truck is sitting still, idling. I understand the Bernoulli effect, but I don't see how the truck sitting their, not moving, is going to be getting enough air flow through those things to make a big difference in the exhaust temps exiting the pipe. Maybe the idea is that the movement of the exhuast gasses through the pipe, past these openings, is going to draw outside air into the tip of the pipe and mix it with the exhaust gasses going out. It seems the exhaust shooting out into the outside air is mixing with the outside air as soon as it exits the pipe anyway.
I just don't see how this will make any significant difference in the temps if the truck happens to be idling, and the dpf happens to be active, and someone happens to walk over to the tip and hold their hand down near it. [img]/ubbthreads/images/graemlins/crazy.gif[/img]
Seems like a ridiculous thing required for even more ridiculous reasons, all because we've created a litigious, ultra-careful and safe and boring, world.... where apparently the only reason for this stupid thing is so people don't sue each other because they thought it'd be a good idea to walk up to someone else's truck and put their hand by the exhaust. And if you remove this ridiculous thing or the ridiculous machine in the exhuast pipe or the cat before that or the EGR(EGRs??) before that, your warranty is voided, you face federal penalties, and you're going to destroy the earth! [img]/ubbthreads/images/graemlins/blush.gif[/img]
Sign me up for a 6.4L! [img]/ubbthreads/images/graemlins/smokin.gif[/img] [img]/ubbthreads/images/graemlins/smokin.gif[/img] [img]/ubbthreads/images/graemlins/vomit.gif[/img]
Or maybe I'll stick to the 7.3L or an old 12 valve. [img]/ubbthreads/images/graemlins/smirk.gif[/img]
__________________
Ryan Arthur
2000 F350 7.3 CC LB DRW 4x4 4R100 4.10 Lariat Performance Mods: ISSPRO gauges, DIY Tymar, straight piped, ITP boost regulator and tee, ATS ported housing, Banks Big Head, CCV Mod, DP-Tuner flip chip, BTS valve body ||| LEDs everywhere: taillights/running boards/mirrors/rear, side lights wired as turn signals, upgraded headlight harness w/ Xtravisions, aux backup lights in bumper ||| Misc. Mods: no more dingers, newer cupholder, fumoto, C-Betrs, locking fuel cap, mud flaps, wannabe air horn, Line-X, behind-seat storage shelf, intercooler foil wrap removed, SS HPX My Truck Pics
[ QUOTE ]
Since these are just on the tips, it seems they'd only be cooling the exhaust that's coming out at the tip (as in, someone walks up to the pipe and holds their hand in front of it... the tips are designed to cool the exhaust at this point). I'll put my hand in front of mine and and it's warm but not hot, but I guess the new particulate burning emissions thing in the exhuast pipe gets the exhaust going out the tailpipe extra hot, and that is the concern.
What I don't quite get is, it seems that unless someone is running really fast alongside your truck while holding their hand right in front of the tailpipe, that the only oppportunity for someone to get burned is while the truck is sitting still, idling.
[/ QUOTE ]My guess it is not to protect people so much as it is to protect property. I fdrive my truck through wheat stubble fields around here all the time. Go off road to find good campsites. Park off the side of the road in the grass to get out of the way when I leave the truck to go hunting....
Any or all of the above would/could start fires without a diffuser tip. I think the main idea was to reduce grass fires and such like, much like the heat sheilds they put on catalytic converters... the chances of someone getting burned by a cat are almost nothing, yet they put heat shields on them. Why? Grass fires. Plain and simple.
My opinion, based on what little we know at this point, is that if you remove this diffuser, you write off any and all ability to ever again drive your truck off road responsibly.
__________________
'99.5 PSD 6 SPD 4x4 Extended Cab long Box F-350
AFe Stage 1 intake, Marinco Block Htr Plug Mod., Hutch in-Tank Pickup Mod, $10 AIC, Walker BTM, Edge Juice with Attitude, and that is all, FOR NOW!!! Next mod = Regulated Return???
Old Truck - '95 PSD 5 spd 4x4
Haulin' a 11.5' camper, an '85 Bayliner Capri 20' boat w/ Chevy 350, and a flatbed w/ two big quads.
2004 Grizzly 660 Yamaha (For Me)
2004 Polaris 500 HO (For the Wife)
Spokane, WA
"I don't ride bulls, but I have fought some men" Hank Williams, Jr.
"Sie vie pacem, para bellum" (if you want peace, first prepare for war...)
[ QUOTE ]
The diffusers aren't for the EPA..... they are there so someone doesn't sue someones pants off....
[/ QUOTE ]
Hey there jim [img]/ubbthreads/images/graemlins/smile.gif[/img] so if one of the aftermarket companies decided to include the diffusers in a 4 or 5" exhaust tip it would still serve the same function as the stock ones? and they could make them chrome too and would stacks solve all the problems with someone burning themselves on the tips as long as the emissions items were left on the truck?
__________________
2001 F350 extcab 4x4 (My truck is slow)
To this point, everything that any of has said is pure conjecture.....
But to answer your question, I would *think* that stacks with some sort of thermal barrier or heat shield would probably keep temps at a safe level. Same thing would go for any aftermarket pipes that included some sort of diffuser.
Any modification (that doesn't involve emissions tampering) only needs to be well thought out and executed (too many add ons and changes that I see don't take servicability into account) and to perform the intended function.
Since none of has any real world experience with the exhaust temps on these trucks during an active regen, we can only rely on what the engineers are telling us.
Linear Mode
