Quoting Graham D: Scott,
Your original post suggests that DVA did ALL the work for you. Did he refit the head and time the cams? If he did, I would leave well alone, he knows what he’s doing.
A few years ago he made the same modifications to the head of my 1.8 EU2 and it transformed it. The engine now feels more eager and is very free revving, but it still returns 40mpg, has no lumpy tick over, and it also appears to have acquired a nice burble on the overrun.
You didn’t mention vernier cam pulleys. My car already had them, so I was able to set the new cams up using DVAs recommended settings.
Graham
Yea he did everything! I managed to get away without vernier pulleys! Dave modified another set of pulleys he had and shimmed it out so get the timing correct! I guess that means it is all timed to suit the ECU?
Just thought if it was a case of swapping ECU's it would be easy power!