Originally Posted by
upthevilla Need some help. Got an updated 1700 xflow, 234 can, pocketed pistons, twin 40's etc. It's out of a Caterham and done 30000. It's been fine until last few days. When I rev over about 2500 I get a scraping noise. It's particularly bad when you come off the the throttle, then it's really loud. It doesn't do it at idle, just over about 2500 rpm. I've listened round the engine bay can't tell where it's from. I initially thought valve clearances but that's more of a constant ticking noise even at idle isn't it? This is more of a slow scrape as the revs drop. I adjusted them anyway to 22 & 24 as quoted by Kent for the 234, noise still there. It's like I say a tinny scraping noise most prominent in lift off. Any ideas? Thanks
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