DPF back exhaust and EGT

[Thinpins]

Hi all,

I know there are plenty of exhaust question topics out there but maybe this one is different. I am picking up my new 2016 SR this week and will be transferring my Unichip Q4 to it. I do a fair bit of heavy work and towing and had a 3inch exhaust with the Q4 on my 2010 because I was concerned about the long term effects of higher EGT on the engine while under load.

Before I get the chip installed and tuned, I am questioning the effectiveness of installing a DPF back exhaust at lowering EGT.

If it's only a DPF back system does it have the desired effect of reducing EGT where it matters?

[Richard]

Isn't installing a chip and a brand new vehicle going to negate warranty?

[Gipsy]

Even if it doesn't Toyota will use it as an excuse for anything including the cigarette lighter not working!

[Gipsy]

As to the original post, yes a 3" exhaust will do what you say I.e. lower temps even after the dpf. It all helps. As to warranty... it leaves you vulnerable.

[Thinpins]

Thanks gipsy. I haven't had any issues previously. If there is an issue the chip is easily removed without a trace. I think the possible warranty problems are something to be aware of but not a big enough issue to not do it.

[Richard]

Thanks gipsy. I haven't had any issues previously. If there is an issue the chip is easily removed without a trace. I think the possible warranty problems are something to be aware of but not a big enough issue to not do it.

Once the Toyota Techs plug their laptops into your vehicle they'll know you've fitted and removed a chip. Bye bye warranty.
On a more personal note, I can't believe someone would be so careless as to fit a performance chip to a brand new vehicle.
If you're after more power that what's available maybe you need to purchase something with more grunt right from the start.

[Jacko9]

How is it careless to fit a chip to a new vehicle? It's no different to putting a chip on a vehicle with 20 or 100,000 km in my opinion.

[Gipsy]

Just my two cents worth, let someone else experiment for a while until the outcome is more certain. The 3l engines have runs on the board, the latest model doesn't.

[Gipsy]

I know this is slightly off topic but as a point of conversation, the 2016 model has significant difference with previous models with more power/torque etc and much of this is due to engine mapping and enhanced technology. Toyota has spent much time and money to compete with other makes. In so doing they would have kept within parameters which leaves some overhead to insure reliability. Adding a 3" exhaust does little to reduce reliability but has demonstrated benefits so I see no reason to doubt those benefits. On the other hand, fitting a chip which alters mapping etc will have many unknowns. My question is what do others think? For info I have both chip and exhaust on a 3.0l but unsure about the new engine.

As to the exhaust question if you get written confirmation from Toyota that the warranty is intact, you have no problems but I doubt you'll get that for a chip.

Fitting a dpf delete is a whole different story, it's illegal and it will delete your warranty!

[Thinpins]

The Unichip plugs into the existing harness and does not leave a visual or digital trace.

As far as things going wrong, It's a calculated risk. In the unlikely event something goes wrong I'm not too worried. It just means fix it if it's not covered. I'm not cranking the thing up to 11 and flogging it. Just using it as a workhorse. I've had plenty of different chips and trucks and haven't had any issues.

[Gipsy]

Yes that's the 'calculated risk' I took I tow 2.5 tonne wherever I go.

For thrills I drive an aurion which does the trick

[Thinpins]

There aren't a lot of options out there to get something bigger. I have a GCM most days of between 3.5-4.5t. Maybe a dual cab cruiser but even then stock they aren't much chop and that'll cost me another $30k. You can do a lot of mods and repairs for that.

[Gipsy]

Agreed, not too many options unless you shell out for a F250 or Dodge ram but who wants one of them? Even a v8 cruiser has its issues.

[Thinpins]

Agreed, not too many options unless you shell out for a F250 or Dodge ram but who wants one of them? Even a v8 cruiser has its issues.

Not me.

Has anyone put a dpf back system on with an EGT gauge?

[Gipsy]

Unless you have the bung after the dpf for the temp it doesn't tel you what's going on.

Before or after the dpf you get some idea of exhaust but only if the dpf isn't doing a burn. Not sure if an egt probe will give reliable temps though.

[Thinpins]

Might just install a gauge before spending the money on an exhaust to monitor it. If its a bit hot Il put an exhaust on to see if it's any improvement. It can't hurt but if there is no need then the money goes to something else.

[Gipsy]

That's right, you need a baseline to see if it helps before and after. My suggestion is put one in the dump, where they are best suited, what you are mainly interested in is outlet egt after the turbo and the burn temps will be higher no matter what the 3" exhaust does. During a burn the egt will soar because that's the intent. What I assume you are looking for is egt temps when loaded with your trailer etc. if the burn raises egt that much you would forever be shocked as the burn happens. It also indicates that higher egt does not harm the system so long as it isn't sustained for any length of time.

[Thinpins]

That's right, I saw a video that the Roo Systems guys posted of their Cruiser before and after install of Unichip and exhaust which showed the same 2t load pulled up and over the gateway. The EGT was noticeably lower after the chip and exhaust install compared to stock.

[Gipsy]

Yes so the dpf makes it more necessary to keep the temp down!

[Richard]

No one is making a full 3" exhaust at the moment, the DPF is the hold up.