Rob Bailey Posted January 18, 2005 Share Posted January 18, 2005 I have had a look through the archives but can't seem to the answers.... Hopefully, if everything goes to plan I will be ready for the SVA late March / early April. I am building a Caterham Hayabusa, but I think the big hurdle might be the SVA emmisions. Do I need to fit a catalyst? or will the engine pass as standard? I suppose another option would be to buy one of them commander unit things and adjust all the parameters down? - is this possible? Link to comment Share on other sites More sharing options...
Rob Bailey Posted January 19, 2005 Author Share Posted January 19, 2005 Nobody have an idea? Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted January 19, 2005 Support Team Share Posted January 19, 2005 This looks like a bit of a minefield. It seems that motorbikes are exempt from emissions testing and therefore the Hayabusa engine is unlikely to meet the emissions requirements for a car. The car MOT testing information is here and you would almost certainly need a catalyst to meet those limits - SVA could be stricter. Using a programmable ECU is not going to reduce some of the gas levels that a catalyst is desgined to remove. How old is the engine? This may have an impact on the emissions you need to meet. You could try contacting Westfield - they must have considerable experience with SVA for busa powered cars. I can't hink of anyone who has road registered a Catheram with a busa motor - they all seem to be track only cars but I could be wrong there. Yellow SL #32 Edited by - Shaun_E on 19 Jan 2005 08:33:41 Link to comment Share on other sites More sharing options...
moomin Posted January 19, 2005 Share Posted January 19, 2005 the short answer is yes, you will need a cat to get through emissions. I would be very surprised if you are able to crank the mixture down enough to pass. you can rent-a-cat from people like The Kit Car Workshop. I think it also has an air injection system too doesn't it? might be worth asking the question of some of the Busa boys here, as I'm not a Busa expert. moomin www.megabird.co.uk Edited by - moomin on 19 Jan 2005 09:11:50 Link to comment Share on other sites More sharing options...
dannylt Posted January 19, 2005 Share Posted January 19, 2005 My Radical with the full race stroker 1500 passed SVA no problems with a catted exhaust and closed loop lambda - I'm not sure if a different map or fiddling was required though. Certainly the standard 1300 motor should be fine with a twiddable ECU. Link to comment Share on other sites More sharing options...
mrblondie Posted January 19, 2005 Share Posted January 19, 2005 i got my busa thro the sva ok .... you will need a cat, and turn fuel presure down till its virtually nill, i tried power commander option but didnt help that much the irony was ...i had turned pressure down so much to go thro emissions test, i couldnt do the noise test, so i had to turn the fuel pressure back up to get it to rev high enough, and the examiner didnt have a prob with me doing that ... what a farce Link to comment Share on other sites More sharing options...
steve_m Posted January 19, 2005 Share Posted January 19, 2005 I got mine through with only a cat in the exhaust. If you buy an exhaust system from Powersped in kent he'll lend you a silencer with a cat in it. My engine is a 2002 unit and had a lambda sensor as standard as well as the PAIR air injection system - I had to increase the fuel pressure to about 46psi but it passed OK. I know other people sell kit but sometimes it's possible to get through with only a cat and careful adjustment of the fuel pressure. Pop along to a local friendly MoT station first and check it. Link to comment Share on other sites More sharing options...
Ross_H Posted January 19, 2005 Share Posted January 19, 2005 i had a problem with my blackbird and the centre rang the DoT and were told that all caterhams should be tested as pre 1977 cars so it passed... probably wrong, but i got a certificate... and i'm taking back to the same nice man next year! Link to comment Share on other sites More sharing options...
Ross_H Posted January 19, 2005 Share Posted January 19, 2005 oh and andy bevridge got it past the sva guy with a lambda and cat fitted i think... Link to comment Share on other sites More sharing options...
Rob Bailey Posted January 20, 2005 Author Share Posted January 20, 2005 Thanks for the advice guys, looks like a cat and lambda are required. I might pretend to be interested in a westfield to get a bit more info. Thanks, Rob Link to comment Share on other sites More sharing options...
andygriffiths Posted January 20, 2005 Share Posted January 20, 2005 Hi Rob,i sva'd my caterham busa last year with a twin silencer system with a cat from James whiting.The kit also came with an air injection system that was originally designed for his carbed fireblade engines but he will hire the system out.Even with this complete system fitted and wired i had to turn the fuel pressure down to about 14 psi to pass emissions.If you need any more info drop me a mail. Andy G GRIFF Link to comment Share on other sites More sharing options...
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