MrTimmah Posted October 23, 2017 Report Share Posted October 23, 2017 Hi Guys, I have a 79 KE55 and recently picked up a pair of 1 1/4 su's for it. I have done some digging on this forum and see that unless i build a "Tough" K motor that they won't be any good with a stock setup? Does that still ring true? Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted October 23, 2017 Report Share Posted October 23, 2017 I'm no expert, but a 1.3 litre designed for less than 80 hp is no place for 2 x 1.25 inch carbies, especially SU. atomisation of fuel is the problem. i can't give u any solid figures but i just feel that its going to constantly bog down. ive used a single su and threw it in the bin. but now ive given u the amm9 to prove me wrong, and u have the carbs so make it work Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted October 23, 2017 Report Share Posted October 23, 2017 I use them, but as typical I've done a porting job, raised the compression, fitted a ground cam & extractors. Definately its faster and uses less fuel, and the SUs are very tuneable. They come off a 1L Austin Healey Sprite or a 1L Mini Cooper, amongst others. They won't bog down, you can tune that out of them, but I don't know if they are any better than the Asian. Give it a go and see. Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted October 24, 2017 Report Share Posted October 24, 2017 there is 2 of them ona 1l engine :o haha wow. that puts my theory to bed. Perhaps my experience is with a Junk SU. i couldnt get it (a single downdraft SU) to operate efficiently, or even close to effectively. interested to see how it goes and i hope u can learn enough about it urself to tune it good. Quote Link to comment Share on other sites More sharing options...
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