i installed a trick flow r series intake (upper and lower) on my speed density equiped 86 gt, the car will start and idel fine but will not rev up quickly and not very much at all. is the problem the speed density? do i need to convert to MAF??? someone told me it might be a VAC leek but i checkd for all that and i donot believe that is the problem. DO i need a bigger TB?? i'm out of ideas on what the problem is!!!! ANY ONE GOT ANY SUGGESTIONS?????