idm ignition advance Nov 17, 2023 9:13:23 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by jonnysnatchsniffer on Nov 17, 2023 9:13:23 GMT ok so the idm ignitions retard 7 degrees, i need 18 degrees at full power say 10500rpm but need 30 degrees at 3000rpm so how do i get it to retard 12 degrees?