I dont know how these lads get on with bike carbs on a car engine. Having recenly built a car with itb's and a programmable ecu, i had to give in and book some rolling road time. I managed to get it running and driving but that was it. So off to the rolling road and what an eye opener, the difference in performance is staggering. With a knock sensor,lamda ,four gas meter and more importanly someone that knows what he is doing an exact air/fuel ratio Vs timing can be achieved. What makes the whole thing wierd is that the correct air/fuel ratio does not always make the most power at a given rpm , as revs go up and down against differing load conditions totally different mixtures and accelerator mixes were needed. End result was it went in with sub 350hp and came out with 525hp. That took a whole day and we got to 5500rpm so it needs another half day to complete. But what the whole exercise taught me was that yes these things can be put on and got working but that is not where it ends, it might tick over and rev but there is a good chance it would do a whole lot better if dialed in properly. Its not much different with carbs I had an old twincam mk1 escort years ago that i tuned and put 45 dcoe webers on , It would scream along at full throttle but drivability was crap, I took it to several places but in the end to a weber agent,the results were amazing, no flat spots,spitting back,flames and it was docile in traffic.He changed chokes, jets, emulsion tubes and just about everthing else.
bob
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