Originally Posted by
RobertISaar
that's just how gen1 heads are.... not sure if you're very active on the 60degreev6 forums or not, but some FULLY prepped gen 1 heads(with upwards of $1000 worth of porting put into them) flowed worse than stock small port gen3 heads. you can go even more nuts with stock parts with the large port gen 3 or the 3500 heads(if you're using a 3.4/3400/3500 block, 3.1/3100 and smaller have bore overlap issues).... then if you port those, you can really see stupid numbers for such a small V6.
anything gen 3 equipped also responds really well to cam upgrades.