DPF-Delete/Tuner Questions

[mdavis203]

I apologize in advance, because I'm sure these questions have been asked elsewhere. I just haven't been able to find good answers on initial searching. But, after a couple of tanks run in my truck, I'm strongly considering doing a DPF/cat delete and tuning. I do have a few questions though:

1. If I do the DPF/Cat delete, do I have to do a tune too? I was thinking that just removing the DPF without tuning would be less likely to be blamed on a problem that would otherwise be covered under warranty. I think I remember somewhere that doing the delete without tuning could cause continuous regenerating, resulting in horrendous mpg's.

2. From what I've read here, Spartan seems to be the most popular and supposedly the safest (least detectable) tuner. From looking at their web site, it seems that it would cost $1600 to get their dpf/cat delete exhaust/tuner package. This is about three times what it cost me to do something similar on my last gasoline truck. Is this right, or did I have too many beers before browsing around their online catalog?

3. Are the Spartan exhaust systems totally bolt-up, allowing easy return to the stock exhaust in case I have to take it to the dealer for warranty work?

[walkeru08]

1. Yes you do need a tuner to do a DPF delete. The tuner tricks the engine into not going into regen, otherwise like you said it will go into constant regen.

2. Yes that cost is correct. Spartan puts a lot of R&D into their products instead of just generic tunes that will work with multiple types of engines. For the HP gain you get that is actually pretty cheap. Im sure the vendors will chime in soon and can probably cut you some sort of deal.

3. Yes they are completely bolt up.

[benjamin24]

Check out Aarons site, dpfdeltekits.com He's a vendor here and can set you up with a package price usually if you want more stuff like a complete exhaust, or intake if you want to run the higher tunes. Great customer service, and super fast shipping. The spartan is $1249 no matter where you get it.

I recommend doing the dpf/doc delete at the least. It's alot easier to delete them both together since it starts at the downpipe which only has 2 bolts. Just doing the dpf involves 8 bolts and the possiblity of screwing up a gasket that you'll need if you ever have to go back to stock.

[mdavis203]

Wow. That's pricey for a tuner. But, I guess you make your money back after a while.

So, do the dpf/doc (doc=cat?) delete kits take if from the downpipe all the way to the tip? Or does it bolt back to the stock exhaust system somewhere downstream of where the DPF used to be?

[superdutydixie]

doing the dpf/doc delete with a delete pipe replaces just the dpf and doc(cat) only. they sell exhaust to replace the entire exhaust from the downpipe back to the tip including a new tip.

[dgeesaman]

doc = diesel oxidation catalyst = cat.

I'd ask about the kit you're looking at but in many cases the stock exhaust pipes will stay. There is little restriction in the stock DPF-back section so changing it is mostly done for cosmetics.

[mdavis203]

The stock DPF-back section is fine. I was just curious how I could replace from point A to point B (two connections) with only two bolts.

[benjamin24]

thats doing the dpf/doc together. It bolts to the downpipe using the 2 bolts thats already there and ties into the factroy muffler and tailpipe. If you don't like the looks of the factory duals, or just want a complete system, I recommend the AFE downpipe back exhaust. I have the 4" stainless dp back without muffler that comes with a 5" tip from AFE thats is awesome quality for a couple more bucks. Loosing the muffler though will result in your truck sounding like a hairdryer (I think it sounds like a jet personally) at idle.

[mdavis203]

Originally Posted by benjamin24

It bolts to the downpipe using the 2 bolts thats already there and ties into the factroy muffler and tailpipe.

That's my question... Is it a slip connection or something, where it ties into the muffler?

[benjamin24]

Yes, it will slip into the muffler section and uses a band clamp to hold it in place.
I think Aaron has some pics of the pipes on his website if you want to check them out. You can also build your kit with different pieces to see the cost differences.

dpfdeletekits.com