'01 Silver - The daily commute smile machine! (Turbo build)

[Ardent]

Shirley must be able to hook up to a gas analyser outside of a mot to see what's what.

[jvanzyl]

Shirley must be able to hook up to a gas analyser outside of a mot to see what's what.

Hmm.. don't know.. I might try tomorrow if I can get the actuator done quickly.

[jvanzyl]

Took off actuator and very lightly welded the arm/eyelet/locking nut together. Should hopefully be good and I hope it doesn't result in a 10psi increase in the pressure needed to open like it did with the other one..

Next up is charge coolant piping.. ergh...

[jvanzyl]

Right, added in the 90 degree bends and bled the coolant! Wasn't as bad as I thought it was going to be.

So now that leaves putting the under trays on, emptying out the stuff from the cabin and giving it a clean.

[Joesson]

@jvanzyl said:

Wasn't as bad as I thought it was going to be.

As is sometimes said - Practice makes perfect.

[thetyrant]

Did you get MOT ok ?

[jvanzyl]

Did you get MOT ok ?

nope... CO emissions too high..
option are:
try and retune the idle and high idle to be more efficient
wrap the exhaust so the 200 cell cat works better
redesign the exhaust to some how have two 200 cells in series
Install more modern injectors that possibly help with the tune..

Currently the test ECU I had is on it's way back to RRR to have the remote logging dodad added to it and have the additional features that will ensure the coolant temp and battery charging light and handbrake light are corrected...

So I need to order some exhaust wrap and a new front hub as one of mine has some play in it..

[Carolyn]

The 200 cell cat we included in the exhaust for the supercharged car struggled on CO emissions, and it was wrapped (heavily).

I came to the conclusion that 200 cell cats just aren't up to the job.

Two in series, though should be fine, I reckon.

[thetyrant]

Thats a shame but i did think it might struggle , do you have the emissions readings from MOT test so we can get better idea on how far out it was ?  some of it can no doubt be improved with more mapping but should be no need to change injectors its all down to the mapping, RRR are not known for the road friendly maps which doesnt help, all depends how far out you were hence wondering that numbers were.

Having 2 x 200c cats might help but its getting them both hot enough i think will be problem, in in series 1 will take all the heat and slow the other from heating up unless you put them in parallel but even so its a lot to heat up, i would just get a high quality cat do it right way, or if there is a way to fabricate in a OEM cat do that even if just for test,  all well and good having free flow system but if you cant get a test its not much use.

Hope you get it sorted.

[Call the midlife!]

400/600 cell cat made into an "MOT" pipe that you can change out for the 200 cell purely for the MOT. Might need a slightly different map for the purpose but shouldn't be much work and you only need to do it once a year.
Initial outlay should pay for itself over time.

[thetyrant]

Somethign like this should do the job with a decent map on there https://www.tegiwaimports.com/tegiwa-universal-400-cel-catalytic-converter.html

[jvanzyl]

Hi all,
Apologies for the absence... life got "busy"..
so here's the emissions:



And here's the plan:
Wrap the exhaust, revert to 2zz injectors, stock ecu, wastegate held open, stock O2 sensors back in.

[thetyrant]

Looking at that fail sheet and such high CO the cat is doing nothing at all! you can try wrapping it to get some more heat but think you will struggle to get that cat to pass unfortunately,

Edit to add rest of it looks ok so ecu/tune etc is most likely not cause for concern its just the cat not working.

[jvanzyl]

Looking at that fail sheet and such high CO the cat is doing nothing at all! you can try wrapping it to get some more heat but think you will struggle to get that cat to pass unfortunately,

Edit to add rest of it looks ok so ecu/tune etc is most likely not cause for concern its just the cat not working.

Hmm.. sounds like wrapping and then paying for a sniff test will help me figure out if there is any improvement...and if the cat is worthwhile.

[mr2garageswindon]

Was the cat up to temperature?
I just did one and even after engine was warm i had to rev past 3000 and hold for 2 minutes before the co started to drop.
Thats on a 37000 mile absolute minter of an MR2..

[jvanzyl]

Was the cat up to temperature?
I just did one and even after engine was warm i had to rev past 3000 and hold for 2 minutes before the co started to drop.
Thats on a 37000 mile absolute minter of an MR2..

Well I thought it was and the MOT guys really tried.. if I can't effect a change with wrapping then I know it's a non starter and I'll look into welding a v banded 400cell in and have a test pipe to swap out to.

[jvanzyl]

Right... first ever attempt at wrapping.. can't find my proper metal snips so will do the ends of the metal ties later.. did the flexi pipe section as a separate piece, no idea if it'll last.

[Carolyn]

I have to say, looking at that cat, it just doesn't look big enough.

[jvanzyl]

I have to say, looking at that cat, it just doesn't look big enough.

I'm hoping this is a perspective thing.. The exhaust is 3" diameter which make make it look smaller than usual.

[Gaz2405]

Looks like you need to find a friendly Mot tester.....

[tets]

Looks like you need to find a friendly Mot tester.....

I know one in Manchester 

[jvanzyl]

I know one in Manchester 

Do we have anyone closer to Watford than Manchester??

[tets]

not sure but by the time you got here, the cat would be warm enough 

[jvanzyl]

not sure but by the time you got here, the cat would be warm enough 

It's only 3 hours drive... might take you up on in if I can't get a decent solution going..

[thetyrant]

Just fit a good quality suitable size cat and that's the job done   then there is mo messing about every year to try and get a test, unless your going for huge power it's not a restriction anyhow and even then with correct size it could still flow enough and be legal.

I used to mess about with decats and things years ago, these days  I'm too old to be faffing for minimal if any gain from doing it.