86onboost

i was reading on thumper page that the way to get more airflow on heads is to port them , or to get a bigger vavle, but if you go too big on the vavle the air velocity is slow, so to make more air speed you need steeper gear like 4:10

so here my question. i have 4:10 gears, and i going to get a head package combo 2 from thumper, but he leaves stock vavles for low end power, since ima be punching the throttle down the strip most of the time, and never riding in streets i figure i can use a bigger vavle since i have 4:10 Gears.


well where can i buy bigger vavles, i think stock is what 1.46 where can i get like 1.94 or something near there

rsw007

go with the gt40 valves 1.85 and 1.54 no need in anything bigger.

86onboost

will they fit stock heads.


and is there somewhere where i can find how i can install it

rsw007

thumper can do it call him and tell him what you want.

hellas85stang

i got 1.94/1.6 ss valves with a back cut for flow on my 70 302 heads and made a difference in power....they had 178/154 valves..if i remember right..with ya gears id go with bigger valves..id go with bigger valves anyway..the stock runners are like 124 or so..so they need all the help they can get...