thanks for the replies... and I dont feel bad about being off topic either.... after the Pugwash debate

I think I will de-cat the down pipe - and leave it so for the MOT - and look at either a de-cat pipe for the post turbo cat or a sports cat system.

any further suggestions would be appreciated.

 

So you're saying that you'll lose the pre turbo cat and then MOT it and after that lose the post turbo cat ? for a totally decatted system?

I just wonder if you have your terminology correct?

Pre turbo is UP Pipe - post turbo is down pipe.

David

 

Let me think about that, I read the other explanation then opened my mouth without thinking.....Oh well.

I shall try again, 2 cats, from the Heads to Tailpipe, downpipe - cat1 - turbo - 2nd pipe - cat2 - centre section - tailpipe.

If the above is correct(and you can understand it), my thought was to remove cat1 and leave it like that; then either use a de-cat pipe for cat2 and refit the cat for MOT, or get a sports cat to replace cat2 as a permanant fitting.

Hope you got that... Phew..

 

wrxyz, here's the set-up on your car - much easier to envisage:-

 

This might help you mate:

 

lol beat me to it Joz

 

 

Well those are suggesting 3 cats as I 'corrected ' a few posts above. To my knowledge the one described as a "rear cat" is not a cat as such. If it is, we've been throwing away tons of beer money for years.....................

BUGG*R

Better apologise again if I am wrong :- NOT A GOOD DAY AT API TOWERS.

David

 

i thought there was a rear cat on newages but it was just a resonator on classics?

 

new age only have 2 cats one in the up pipe and after the turbo

hawkeye wrx only has one cat and that is after the turbo

for mot you will only need the cat after the turbo

i have a fully decatted system and mine passed with no cats at all on my hawkeye

before mot if you have it fully decatted i would have the section after the turbo with the cat in it handy just for to replace each time before mot then remove it after for the decatted piece as it helps on achieving more power and gas flow

 

According to that diagram, it either has 3 cats and 1 resonator... Or if David is correct, then 2 cats and 2 resonators!

Unless, of course, that diagram is plain wrong.

 

there isnt 3 cats theres only 2 cats on the newage and one cat on the hawkeye after the turbo

 

Sure.

BTW, that previous post of mine wasn't questioning you -- just saying what I see in that diagram.

And yeah, that diagram is old - it's illustrating the Bug (and possibly the Blob) WRX.

But it looks like it's wrong anyway! (Based on what you and Dave have said).

 

You learn something 'new' pretty much everyday re. Subarus.

 

yep on the hawkeye there is no cat in the up pipe and one after the turbo then a resonator

but on blob and bug there is a cat in the up pipe and one after the turbo and a resonator to get full gains a turbo back decat and up pipe is needed or a sports cat and the rest decatted

 

just to confuse matters it is only the blob(and bug?) wrx that has the cat in the uppipe.

I will have to look at the down pipe in my garage then because it certainly looks like it has 2 cats in it. Why would they put heatshields around a resonator?

 

- STI TMIC
- HRC fuel pump
- NGK plugs
- EcuTek remap
- HKS panel filter
- VF43 turbo
- full decat

I did the above cost me £990 for estmited 330/350, take off the turbo save £300 and you have a nice 280 but will want more i guarantee it might as well it all in one

 

well i am glad i asked about the cats ... i think!
So I hesitantly say - i can do away with the pre cat ( mine is a 2001 bug), and i can just have one cat after the turbo. which looks easiest if its the 2nd or rear cat that is fitted to the centre section.
Unless of course you know different..

 

That's remarkably cheap.

Fuel pumps are cheapest for quality at 65.00
NGK plugs might be 30.00
Ecutek ought to be a minimum of 500.00 - officially 600 I believe.
HKS filter might be 30.00
Full decat even secondhand ought to be 250.00 rather more if new

That's 875.00 before the turbo at say 300 for a total of £1175.00

David

 

sorry to go back to the cats but it sure looks like two cats in the downpipe from my blob wrx:

 

Just a case of waiting for a bargain and then haggle a little, but yeah i did my maths wrong doh worked out £1100 ops my bad

 

Hah.

Even API knows what one should be spending on any given amount of mods (...let alone advise on the correct ones.)

 

If you need one of our HRC pumps in 255, 290 or 340 lph let me know, always a deal to be done for scoobynetters.

We also do our big 6002 which is inline and flows 220lph at 5 bar (305lph O.F.)
All HRC pumps have our no quibble warranty.

Cheers Rob@HRC