Is there a Catalytic convertor on GU 4.2 Patrols?

I soooo should use the spell checker before I post... but I think you get what I mean...

Short answer is NO.

Dont worry about spelling we know what you mean.

MAtt

out of interest what were the dyno figures? I would like to compare with mine done by Denco diesel. The 90 deg bend is nothing to worry about and cannot be avoided. Is yours an intercooled model?

There is no real gain in replacing the exhaust only on the TD42T, the restriction is in the turbine housing.

We do a modded turbo with exhaust fitted for the TD42T for $2750 with 3" exhaust that yields around 20Kw and 40Nm with lower EGT's and low engine temps when towing.

MAtt

Did you get the timing/tuning done also? Everything ive read states that to get any real gains you need to get both the exhaust & timing done.

Ok

(1)Was the DUMP pipe changed, can you tell if it has been changed.

(2) Has the fuel screw cap been taken off???

(3) What brand of exhaust was fitted or was it a custom job??.

(4) Is the heat sheild still covering the dump pipe ??.

Matt

Coyote,

Catalytic Converters are only required on unleaded petrol engined vehicles and has been compulsory on all ULP vehicles for many years.

The catalytic converter turns gases such as carbon monoxide, hydrocarbons and nitrogen oxides into non-toxic emissions such as carbon dioxide and water vapour.

So you are basically turning a poison (carbon monoxide) into a ozone layer depleting substance. (carbon dioxide)

Can't win can we.

Yo,

I bought an MTQ dump pipe and 3" exhaust for my 03 GU 4.2 TD intercooled ute, and fitted myself. The dump pipe does not look a lot different, and indeed the heat guard fits back on again, so if i had not done it myself, i wouldn't have known it was different.

After the dump pipe, the system has a small section of flexible pipe (looks like a braided brake line on a bike) just next to the gearbox, then it has a very large muffler which sits just in front of the rear axle. the muffler is a straight thru 'hotdog' style, and therefore virtually totally non-restrictive (aka like a aftermarket dirtbike muffler). i got to peer down it to check it was a straight thru job, as i fitted it all myself.

now, the power. No dyno for me, but IMHO, there has been no increase in power, and no change to fuel economy. The only real difference is that it has a slightly more beefy sound. overall, it was a waste of money, but hey, you got to try these things. I agree with others, if you got the pump tuned to suit, then you will get power, but will loose economy (and our engines are thirsty as it is). that said, you would want to get a good tuner to do it, most average mechanics would just turn the screw up a few turns...

trolute

Coyote, I had an MTQ modded turbo fitted about three years ago, was ok, until I drove from Vic to Towoomba and had it tuned by MTQ, half an hour and it was transformed, so well worth the drive. Driving up next week to have my new wagon done. Impressed, yes, very. John

Had the beaudesert 3" system installed and it made a huge difference. Must be in the tuning.

Peter

Thanks all for the great feedback.. it really sounds like I'll need to get some tuning done.. maybe go for a day trip out to Toowoomba.
I am pretty confident that my system includes the dump pipe, but I am also pretty sure I have a Cat' in the system too, so between opening up the Cat' and gettig a tune up done, I might be able to have a pretty significant improvment from all reports. Cheers all.