Derek Batty Posted April 11, 2018 Share Posted April 11, 2018 just found out a garage has set up a rolling road on iom and was wondering if worth taking seven down to Have cat removed and set up on rolling road ??? Does it make much diff in power and is it any noisiercar is a 150 sigma roadsport. Also any were to buy cat bypass pipe derek Link to comment Share on other sites More sharing options...
K7 VCT Posted April 11, 2018 Share Posted April 11, 2018 Bypass pipes from caterham. Link to comment Share on other sites More sharing options...
Derek Batty Posted April 11, 2018 Author Share Posted April 11, 2018 Have you one fitted and are they worth it. As on iom lucky no mot every year like uk derek Link to comment Share on other sites More sharing options...
jrgibb72 Posted April 12, 2018 Share Posted April 12, 2018 Derek,Same car, got a Caterham decat pipe, a little louder but mainly did it as I think it looks a lot better with the cat removed, 20 min job to fit and pop back on come MOT time. In theory there should be a marginal power gain as less restriction for the exhaust gases but not so you'd notice Link to comment Share on other sites More sharing options...
K7 VCT Posted April 12, 2018 Share Posted April 12, 2018 Hi Derek. I did consider it as one was up for sale second hand. I was informed bu caterham that mo real gains except a different note to the exhaust and better looks. My car is the ti-vct sigma running the 310 upgrade at 155bhp. Didn't think its wort the expense after the above. Cheers Julian Link to comment Share on other sites More sharing options...
JNC Posted April 12, 2018 Share Posted April 12, 2018 I was told by CC it's about 5 BHP on a 2ltr Duratec but the main reason if you change to roller barrels the engine backfire's on over run more and it will destroy the catalytic converter . Link to comment Share on other sites More sharing options...
Derek Batty Posted April 12, 2018 Author Share Posted April 12, 2018 Thanks for comments. Derek Link to comment Share on other sites More sharing options...
Derek Batty Posted April 12, 2018 Author Share Posted April 12, 2018 Thanks will give them a ring as said lucky live on iom and no yearly mot but would keep just in case sell to uk your right looks well without derek Link to comment Share on other sites More sharing options...
sjl1 Posted April 12, 2018 Share Posted April 12, 2018 Steve from premier power recommended this as a cheap upgrade and reckoned it made a big difference to midrange power and i certainly noticed the difference. Would be very interesting to see before and after power curves Link to comment Share on other sites More sharing options...
Derek Batty Posted April 12, 2018 Author Share Posted April 12, 2018 Hi my idea Also was going to take car in put on Dyno first take readings then put on bypass take readings. To see diff Will put readings on site when done poss three weeks time derek Link to comment Share on other sites More sharing options...
Mrp Posted April 13, 2018 Share Posted April 13, 2018 My cat is removed and I would agree better noise and better mid-range. Of course even better is decat pipe and peashooter exhaust which I swap too some times. Mrp Link to comment Share on other sites More sharing options...
RogerB Posted April 16, 2018 Share Posted April 16, 2018 A very interesting read. I’m now thinking of de-catting my 1.6 K series. I’m running at 190 BHP and mid range drops off a bit. I’m also lucky my MOT station is very sympathetic about this sort of thing. Where should I look for a Cat bypass?Roger. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now