2.2 TDCi (Puma) CAT Delete

**martnH** · 29th January 2018, 02:41 PM

Asumming two things the decat produce the same amount of health harms as the remap plus egr-shutoff. And secondly the decat can not produce the same amount of power gain (on top of the 170 bas remap

We have three strategies here (ignore the strategy of decat without remap for now)
A stock engine no mods
B 170bas remap
C 170 bas remap plus decat

We can calculate a series of incremental power gain-harms ratio (ICPH)
The ICPH of remap =additional power gain from remap (power gain of A - power gain of

/additional harms from remap

This number is higher than my threshold ICPH so I am I favour of remap

The ICPH of remap plus decat is less than that of the remap because the harm is doubled while the power gain is not doubled (under our assumptions). And this ICPH of remap plus decat is lower than my threshold . So I don't want a Decat over remap because the decat can not provide a favorable power gain to harms ratio.

So I will seek another options for power gain such as even bigger intercooler or hi flow cat or another engine

This is what I have been talking about.....And nothing more....
I don't care about the environment at all just like you

**Toxic_Avenger** · 29th January 2018, 04:25 PM

OT
Martn... your PM's are full FYI.

**karlz** · 29th January 2018, 05:39 PM

Originally Posted by martnH

The ICPH of remap =additional power gain from remap (power gain of A - power gain of

/additional harms from remap

minus (Fx * ICPH)

where Fx = time difference between point A and Point B due to more hp and time holding breath

Tombie · 29th January 2018, 05:53 PM

Originally Posted by martnH

Actually......I never meant to criticize the decat. Sorry if you feel this way.

I just want to know quantitatively what is the power gain. I am not going to breathe in extra toxic fumes (on top of the remap and egr shut-off) plus the risk of getting caught (albeit very unlikely) for less than 15 horsepower gain plus an improvement in fuel economy of $50 per year

There is no quantified power gain from a decat.

It’s benefits are:

Quicker turbo spool up
Reduced heat in engine bay and radiated to the cabin of the vehicle.

So no more power (generally) but quicker pick up of the available power. And a lowered cabin temperature around your feet.

And I will repeat. You and your passengers won’t breathe in more anything... it exhausts behind you.
So if the vehicle in front / beside of you has a decat, failed cat, tune, EGR closure etc - that is when you’re breathing in higher emissions.

**DazzaTD5** · 29th January 2018, 05:53 PM

Personally I'd rather not **** on the environment or peoples health. BUT all that aside...

My focus is remap vs cat delete.
*I've driven both a 2.4 and 2.2 decat.
*I've also drive a 2.2 remap and decat.

Personally I find the decat on a 2.2 in stock form performs better than most remaps I have driven, so I see one as an expensive somewhat bull**** item that get pushed by so many remap places out there.
*The decat also I find makes the engine run smoother and quieter.
*The remap places are always going to sprout their wares as a better alternative.

Regards
Daz

Tombie · 29th January 2018, 05:57 PM

Agree in part Daz.

The decat allows what you have to come on quicker and smoother.

The Biography tune improves low speed shunting and has a definite increase throughout especially when loaded.

The EGR closure is nothing but an engine cleanliness fix.

**martnH** · 30th January 2018, 06:56 AM

Originally Posted by Toxic_Avenger

OT
Martn... your PM's are full FYI.

Just clear the inbox
Pm (the dyno chart?!)

**martnH** · 30th January 2018, 07:07 AM

Originally Posted by Tombie

Agree in part Daz.

The decat allows what you have to come on quicker and smoother.

The Biography tune improves low speed shunting and has a definite increase throughout especially when loaded.

The EGR closure is nothing but an engine cleanliness fix.

My garage is deep and doesn't have good ventilation. That would be a problem for me.

Also Check out the latest news
VW, Mercedes-Benz, and BMW used monkeys to test exhausts of their cars

So usually first stage is retrospective study (or observational study). So you get hold of a bunch of patients with lung cancer and bladder caner etc..And you look at their exposure to thing of intest (diesel exhaust on our case
And then you work out how strong correlation is.
And if strong, this exposure is flagged

And second stage is prospective study so you do the experiment in lab environment under control

I just wonder what would be the result of the reported experiments. The results were never published....They must have know something

**debruiser** · 30th January 2018, 07:20 AM

To be honest I'm a little shocked by the dirrational of the thread. We drive 4x4s..... if you really cared about the environment you'd crush ur 4x4 and get the train or walk or ride a bike.

Decats - im going to order one as soon as they become available at Davis performance. 😊 looking forward to more bolt on's 😊

**PAT303** · 30th January 2018, 08:27 AM

Originally Posted by DazzaTD5

Personally I'd rather not **** on the environment or peoples health. BUT all that aside...

My focus is remap vs cat delete.
*I've driven both a 2.4 and 2.2 decat.
*I've also drive a 2.2 remap and decat.

Personally I find the decat on a 2.2 in stock form performs better than most remaps I have driven, so I see one as an expensive somewhat bull**** item that get pushed by so many remap places out there.
*The decat also I find makes the engine run smoother and quieter.
*The remap places are always going to sprout their wares as a better alternative.

Regards
Daz

I've found the performance gain by my decat and EGR closed is good enough for me,not going to bother with a map. Pat

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