will a 106/saxo 1.1 standard exhaust and cat fit my vtr?

8th June 2010, 19:10

as above

cheers

8th June 2010, 19:20

yes...Wrong section btw

8th June 2010, 19:22

in theory yes.

but the shape and lower hanger from a VT cat is different to a 1.1 so that would either need chopping and moving to make it fit. or just dont bother bolting it into the box.

8th June 2010, 19:30

sorry mate

that's great news and it will pass its mot with a 1.1 cat fitted?

guessing they all reduce emissions the same just the hanger which differs as you've said?

just to clarify this is a 1.1 exhaust going onto a 2003 vtr mk2 (cat in manifold) but i have a decat 4-1 manifold fitted and got my mot this week...

pic of the exhaust:

cheers

8th June 2010, 21:53

bump! need a definite answer asap!

bit concerned where the cat meets the manifold will be same fitting/bore etc as a vtr?

cheers, chris

8th June 2010, 21:54

shouldnt your CAT be in the manifold . . . not underneath.

8th June 2010, 21:56

Quote:

Originally Posted by chris_ph2

just to clarify this is a 1.1 exhaust going onto a 2003 vtr mk2 (cat in manifold) but i have a decat 4-1 manifold fitted and got my mot this week...

You have the pre and post cat sensor then? Therefor you need one in your manifold and another one after your cat to make it pass emmisions. You could be really lucky and it passes but i doubt it/

8th June 2010, 22:02

Quote:

Originally Posted by tonto_VTR

shouldnt your CAT be in the manifold . . . not underneath.

cat was in the manifold but i swapped it for a decatted 4-1. could just refit the original manifold for mot but it's a pain in the arse, be a lot easier doing it this way

Quote:

Today 21:56
db_sax Quote:
Originally Posted by chris_ph2
just to clarify this is a 1.1 exhaust going onto a 2003 vtr mk2 (cat in manifold) but i have a decat 4-1 manifold fitted and got my mot this week...

You have the pre and post cat sensor then? Therefor you need one in your manifold and another one after your cat to make it pass emmisions. You could be really lucky and it passes but i doubt it/

pre cat sensor is in the manifold. i heard that's what controls fuelling etc and therefore affects emissions, and the second sensor's only job is to check do the post cat readings match the first sensor ie has no effect on emissions

8th June 2010, 22:05

Quote:

Originally Posted by chris_ph2

cat was in the manifold but i swapped it for a decatted 4-1. could just refit the original manifold for mot but it's a pain in the arse, be a lot easier doing it this way

pre cat sensor is in the manifold. i heard that's what controls fuelling etc and therefore affects emissions, and the second sensor's only job is to check do the post cat readings match the first sensor ie has no effect on emissions

if your 2nd lambda isnt working correctly your car may run like a bag of wank and possibly fail the emissions! it knows what it SHOULD be reading, and have a bit either way of that... if it doesnt read what its programmed to it will fuck everything up!

hang on, im reading this being too cold, too pure, hmm ill tell lambda one.
lambda one says hmm im hot, and giving enough air fuel ratio, so it should be burning corectly... how about adding more fuel.
and such.

lambdas play a big roll! not jsut emissions.

8th June 2010, 22:06

Quote:

Originally Posted by chris_ph2

cat was in the manifold but i swapped it for a decatted 4-1. could just refit the original manifold for mot but it's a pain in the arse, be a lot easier doing it this way

pre cat sensor is in the manifold. i heard that's what controls fuelling etc and therefore affects emissions, and the second sensor's only job is to check do the post cat readings match the first sensor ie has no effect on emissions

should be all good then

8th June 2010, 22:18

i'm sure it's the first lambda takes all the readings and sends them to the ecu. so long as that one is working it will run correctly!

second lambda checks do the readings match, if so your cat must be faulty and the engine management light comes on

car seems to be running fine. i had no lambdas for a couple of weeks and my fuel economy dropped considerably. now the first lamba is back in and working (still got no second lambda) i'm getting the same mpg as when the car was standard

just need to know for definite if this exhaust will fit my car as i can buy it and fit it tomorrow!

10th June 2010, 21:35

turns out it wouldn't have fit, apparently where it meets the manifold is a different fitting. thought about just buying it for the cat and getting a vtr midsection then weld the cat into that for mot. came to a good hundred quid to do that though. so just fitted my standard manifold in the end and it passed the mot this morning

just need to refit my 4-1 before fcs now lol

10th June 2010, 22:08

Posted ages ago by Scott. Take from it what you will.

Quote:

Originally Posted by Scott

car doesnt have two lambda readings.

First sensor measures the fuel/air mixture.
Second sensor checks the cat is working by comparing readings with the first sensor. Doesnt relay any of the readings back to the ecu to change the fuel/air mixture like the first one does it just says to the ecu: Yes the cat is fine or cat is fucked.

If you take the cat out and put the two sensors back in then the second sensor reads the same as the first so it flags up the management light to say the cat is funked.

If you put the sensor in the sleeve then the gases it reads must be cleaner than the first one so it continues to say to the ecu the cat is fine.

The first sensor is the important one, even if you do plug the second one back into the system and it flags the ecu light it wont actaully change the fueling, however it makes it hard to judge if anything else is wrong when the management light is on all the time.

From that I deduce you need a Lambda sleeve to screw your second lambda plug into, and the first one should screw into the plug just before the cat. You may need to extend the wire to get it to reach though, because it will be designed to plug straight into the manifold usually.

The fixings should be identical if you've got the right system. The manifold should come down under the car and have 2 bolt holes either side. The 2 bolt holes on your 1.1 exhaust should then match up to these and put the bolts back in. Simplez.

10th June 2010, 23:31

Quote:

Originally Posted by -Dan-

Posted ages ago by Scott. Take from it what you will.

From that I deduce you need a Lambda sleeve to screw your second lambda plug into, and the first one should screw into the plug just before the cat. You may need to extend the wire to get it to reach though, because it will be designed to plug straight into the manifold usually.

The fixings should be identical if you've got the right system. The manifold should come down under the car and have 2 bolt holes either side. The 2 bolt holes on your 1.1 exhaust should then match up to these and put the bolts back in. Simplez.

pretty sure the 1.1 exhaust is a smaller bore than the vtr. also the chap at the exhaust place checked a book with all the standard saxo exhausts in and although both two bolt fittings looked identical (1.1 and vtr) the part numbers alongside were different. guessing these might've been different gasket codes or something. didn't fancy risking it to be honest plus the cat might've been nackered plus the cost of it plus fuel. knew my standard manifold was fine and it's ended up costing me nowt!

11th June 2010, 01:25

The second lamba sensor doesnt have any effect on how the car runs, it just picks up on clean air. put it in a sleeve under the bonnet and ull be fine or just cut it off if you can cope with management light being on all the time

11th June 2010, 08:00

It really isn't mate. I have the VTR Exhaust mated up to my 1.1 Manifold. The 16v exhaust had a larger bore, but all 8v exhausts are identical bar the chrome tailpipe welded on the end of the furio/vtr backbox.

11th June 2010, 23:05

Quote:

Originally Posted by -Dan-

It really isn't mate. I have the VTR Exhaust mated up to my 1.1 Manifold. The 16v exhaust had a larger bore, but all 8v exhausts are identical bar the chrome tailpipe welded on the end of the furio/vtr backbox.

ah right cool cheers

glad i thought it wouldn't fit though as doing it this way it's cost me nowt. wasn't too bad a job either. the more you do it the easier it gets. just put my decat mani back on tonight, took less than an hour. all set for fcs! car just needs a right good clean now

gonna sleeve the second lambda when i get back off holiday

cheers, chris