Not too happy with roller rockers

[SKNOT9]

Hi there. About a week ago i fitted the mace 1.9:1 high ratio roller rockers to my vs v6. I havent noticed any power gains at all. Im wondering whether i need to get a new memcal written? will this have much impact?
Any help would be great thanks.

[immortality]

it normally takes a few days (couple of drives) for the ecu to get to grips with the differences and retune itself. try re-setting the ecu (just unbolt the negative terminal on the battery for a few minutes)

also note that the mace rockers are standard re-manufactured rockers and aren't true roller rockers like the Yella Terra ones

[cander24]

When I fitted 1.97:1 roller rockers to my v6 I reset the ecu straight away and noticed some pretty good mid to top end gains straight up after fitting them. As said above this got better over the next week or so (about maybe 300km worth of driving) and also then got some improvements in the bottom end too. You dont need a modified memcal. Just give it time to recalibrate a few settings and they'll come good.