Running a Td4 with a straight-through CAT?

Hard Drive said:

I've been trying to find a similar Stub Box, as per your measurements, but alas cannot locate similar. Might you be able to point me in the right direction?

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Nodge68 said:

I used a box similar to this
https://www.ebay.co.uk/itm/220566353977
90° Bend https://www.ebay.co.uk/itm/352724212288
Clamps I use are like this, although you'd need to measure the pipe stubs and get the correct clamp to suit.https://www.ebay.co.uk/itm/293090063667

Thanks, Nodge. My next project is to repeat your own. I'll start my list tomorrow. The Corona virus will delay the start, but will get organised beforehand.
Thanks, once again.

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hd3 said:

a.f.a.i.k the test done to a c.a.t. would be to measure it's temp ..
is the emissions test for a diesel not just about smoke particles emmited ?
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anyhow .. i kept the c.a.t. intact and fitted a straight thru backbox ( stainless.s )
works fine .. as in .. a tad better response from lower rpm .. sounds good as well


well do take a look at :
https://www.landyzone.co.uk/land-rover/intercooler-problem-mod.126484/
( pics on page1 are a bit blurred for some reason ..
( be clearer pics on page 2
i.e. the quicker the air flows across the maf. sensor ..
the quicker the engine will respond to go-pedal input
particularly from the lower rpm range
( the main drive-abilty issue with the td4/m47r in stock format .. i.m.h.o. )
adding some heat insulation to the air intake .. negates the engine bay heat soak effect ..
i.e. 'cause the heat be registered with the air temp sensor .. and reduces fuel input ..
resulting in potential sluggish response until cooling air enters and drives away built up heat
.. the egr delete-mod would be part of that a.i. modification ..

then .. with the added torque at the lower rpm ..
consider adding slightly larger tyres to raise the gearing a bit
( unless you go off-road .. might be detrimental in that case )

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Avocet1 said:

I've had superb service from these guys in the past:

https://www.ebay.co.uk/str/everyexhaustpartlimited

They made me up a stainless centre box for mine when it failed. I welded it on to the back of the OE cat, rather than replacing the whole cat-and-centre box assembly.

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