just swoped the injectors to smaller 195cc to see if this corrected the problem and it has made a hell of a difference. We have now got it to idle around 14-15 AFR. So what is stopping us running larger injectors? is it as rick says and that it needs to be MS2 to run these?

When running the 480cc injectors the bins were as low as 4 to get a good AFR idle but with the 195 cc injectors there in there 20's. But every other map we have looked at has been around 20-30 on idle and nowhere near 4 !! Is there a reason why this is as low as 4 or dosen't this matter?