thanks for the help guys ,was just in such a rush to see what my freshly painted rocker cover crossover and inlet mani looked like i just kind of mocked it up and forgot to tighten it properly
still was quite surprised how hard it actually revved,have had cars with air leaks in the past and they just rev a wee bit faster or rise and fall a bit,thats why i was worried it was something else
thats me dumped the dump valve now after i gave it a good wee rev and heard that chatter