whats the best exhaust de cat pipe to buy for my sri turbo and is there one where the emission light wont come on,
Im guessing u mean de-cat as in a pukka de-cat as in the main cat
therefore how about this for a ton?
http://cgi.ebay.co.uk/Astra-Mk4-GSi-Coupe-Turbo-De-Cat-Exhaust-Pipe_W0QQitemZ350126509961QQcmdZViewItemQQptZUK_Ca rsParts_Vehicles_CarParts_SM?hash=item350126509961 &_trksid=p3286.c0.m14&_trkparms=72%3A1301|66%3A2|6 5%3A12|39%3A1|240%3A1318
Its obviously got the lambda boss all ready but u may need an O2 cheater to allow the probe to sit a little proud of the main pipe
The cheater would look like this
And heres an example (would need to check it would fit first) : http://cgi.ebay.co.uk/O2-Oxy-isolator-Extender-for-HHO-Hydrogen-sensor_W0QQitemZ140283593771QQcmdZViewItemQQptZUK_ CarsParts_Vehicles_CarParts_SM?hash=item1402835937 71&_trksid=p3286.c0.m14&_trkparms=72%3A1299|66%3A2 |65%3A12|39%3A1|240%3A1318
AND..... Yes, I know that this would/could fail an MOT emissions test even with the cheater on....
What sort of gains will this give?
I'm assuming the precat removal pipe will give better gains but this is the icing on the cake
How does the cheater thing work GB? (looks to me like it just sticks the lamda sensor furth back, out of the pipe?) Surely it will still pick up on the gases and know it's not right?
One of my mates put a decat pipe on, and i'm sure he had to cut a hole and weld a nut on, to screw the sensor into, and that kept putting the light on every now and again.
Mk5 Astra 888 CDTI No.58
"you can’t help but drive the 888 Astra hard, everywhere, constantly" - Evo Magazine.
I previous cars I have owned I have just used a sump bolt in the lambda hole and just zip tied to lambda up, jobs a gooden but may not work on this car I'm not sure
Obviously you can only do this on the downstream lambda