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Hello and thanks for using just answer. Now without hearing it is it like a clackng noise kinda like an old mill machine running, you say it gets louder with throttle which leads me to beleive you have a lifter noise or top end valve train. Has the engine ever run low on oil or had a bad oil leak and how many miles are on it. Timing belts make noise but usually if they are not installed correctly and not the type noise you are describing. Have you had an oil light and what is the service history like on the engine?
If you havent owned it very long pull the oil dipstick and look closely at it if you see a burnt varnish appearance on any of it usually will go up the whole stick that is signs of oil not being changed properly and that can stop up a screen and remember the lifters and valve train suffer the most under any of these conditions becasue they are the last to receive oil. and if i am correct and that is your noise it would require removal of the cylinder head to repair but there could be an underlying issue such as low oil pressure so you would want to check that first with a mechanical gauge and monitor it while driving the car. How many miles on this engine
Hello can i help you further