Peugeot 806 Cat Removal

It won't give you anything like 12bhp. You may see a couple of bhp at best.

Overall, it's not worth doing.

In message , Capt T writes

Part-ex it for a car with enough power.

Apart from my (heartfelt) comment about 'if you want a fast car, buy one', I once bought a Fiat Tipo with a 2.0 16v engine that had a 'de-catted' exhaust - it did less to the gallon, made more noise out the end of the exhaust, vibrated many parts of the car's interior and (the real problem) made a terrible 'booming' noise in the cabin, making it painful to drive for more than 2 hours.

The addition of a used cat fixed it, (and improved the performance) but cost money. This was also true to a lesser extent with my last Alfa 33 (a 1.7

16v model) that had also had the core removed from the cat. No problems at MOT time. (both cars were too early to actually require a cat for a UK MOT)

I think that the lambda sensor will make the correct adjustments (cat core or not) but the injection system is set up to receive it's input - removing the sensor will spoil your mixture.

In a nutshell - sell your current car and buy a car with a bigger engine - enjoy the ability of your new car to pull the skin off of more than one rice pudding!

Adam H

The message from "Capt T" contains these words:

Surely for towing, more torque would be the order of the day?

I hear what you say but have never really understood what is meant by more torque.Surely hp is a way of evaluating how much power a car has to tow? All i know is I am fed up with struggling up hils towing the van but need the 7 seat capacity of this car when holidays are over.Any suggestions most welcome for replacement(2nd hand I am afraid) Thanks for all your info

It all depends on engine speed. If you increase the peak power, but the extra is only available at the top end of the rev range, that's not going to help your situation. You want the extra power (= torque * revs) available further down the rev range, about where your peak torque is anyway. Thus increasing the peak torque will help.

cheers, clive

Very true. I have to ask, if 124bhp isn't enough, what the hell are you towing? Anything that needs more than that much power is probably too heavy for the car!

I tow with a 132bhp Toyota Previa auto; it has plenty of power to pull a

7 metre Award Superstar in full continental holiday trim, 2 adults, three kids, bootful (and I mean full - that's a big boot!) of booze and still achieve all legal motorway speeds with respectable acceleration.

I've also towed the same rig with a 132bhp Mercedes 230TE auto, also plenty of power, a 102bhp Landcruiser (diesel so bags of torque), and a

102bhp Shogun petrol - the least capable of the bunch. All but the Merc are much heavier cars than your Peugeot.

You won't beat a Toyota Previa for this. It's the most stable towcar I've ever had, even against the 4x4s (missed the Discovery TDi off the last post but it doesn't come close to the Prev). It also has a bigger boot than any other MPV - due to the mid engine, all the seats start further forward.

Its only downside is its thirst, and the auto box, which makes towing so much easier, also increases its thirst! We get 16-19 mpg. Although a cheaper alternative like the Kia Sedona will be on our replacement list, I suspect an LPG-converted Previa will be our eventual car of choice.

I suppose it is because I always feel it is struggling as against going solo and on motorway hills the speed drops off so you have to drop a gear at some point.My van is a bailey ranger 450/2 which is maybe 1200 all up? Time and again I seem to see vans zoom past effortlessly pulled by a variety of tugs and I wonder if i could do better. Regards

Nope.

My lorry has only 420BHP but 1850 lb/ft of torque because its designed to pull a 35 tonne trailer.

Christ almighty. With that fuel consumption I'd buy a 7.5t lorry and convert it to a luxury barge. You'll get better mileage.

Capt T ( snipped-for-privacy@Nospamhomecall.co.uk) gurgled happily, sounding much like they were saying :

You've got 1200kg tied to the back bumper of your 1600kg people carrier -

2,800kg in all - over three tons by the time you've got a few people and some stuff inside, and you're wondering why 124bhp of 2.0 petrol engine's struggling to drag it up hills? 40bhp/ton?

Flog it and buy something that's up to the job.

The message from "Capt T" contains these words:

Not really. Sheer power comes at high revs - which you really don't want to maintain for long periods when toying - it's frantic and unpleasant.

Torque is the ability to pull at lower revs - far more suited to towing

- unless you're caravan racing.

IT's one of those pointless arguments though isn't it. An engine with the same power, half the torque & twice the final drive ratio will pull just the same. What you actually want is a nice steep torque rise for constant throttle to make driving easier. & if you've ever towed anything heavy behind an NA LDV Convoy or Transit then you drive a t pretty much peak power, not peak torque.

Lol... - I was pulling a VW Polo back from Portsmouth once on a three point hitch (Driverless) with my V6 3litre Volvo estate. A Ford focus raced me off the lights and I won, towing another car! - All the way to the legal limit. If you must stick with petrol, look at a second hand Renault Espace V6 or get a diesel 806 2.2HDI - I suspect the HDI is a better bet as fuel consumption will be good, and you should have very good torque.

Follow the link below for an explanation on the difference between HP, BHP and Torque. ----->

I suspect that the vehicles overtaking you are probably diesel powered, therefore they have enough torque to maintain a good speed up steep hills, due to more usable power at lower revs.

Andy

Nik&Andy ( snipped-for-privacy@adenleyremovethis.f.co.uk) gurgled happily, sounding much like they were saying :

I was going over the Dartford Bridge last week - about at the top there was a c. late 80s/early 90s Escort van.

With a car trailer on the back.

With a Volvo 700 estate on it.

Barely moving.

LOL... - I'm not surprised, those things way a hell of a lot.

He was probably legally overloaded also....

Andy

Nik&Andy ( snipped-for-privacy@adenleyremovethis.f.co.uk) gurgled happily, sounding much like they were saying :

Umm, yes. Just a little. Like, ooh, heading for double? Probably just as well he couldn't get the damn thing up to speed - but I wouldn't have wanted to be front of him for the queue for the toll booths at the bottom of the bridge...

The message from "Nik&Andy" contains these words:

Very illegally overloaded, I'd have said.