Tunnel ram plenum spacer

Newbomb Turk said
I would be very careful about adding a bunch of plenum volume on a manifold like that.

It’s not a 1970’s design.

You can keep adding volume on the dyno and it will make more power

In the car it will be a pig off the brake or the pedal if you foot brake it. It will be slow off the gear change(s).

You really need to test that in the car.

Do you happen to still have your small block tunnel ram? I am have one heck of a time trying to get this Indy intake welded up. The porosity is so bad that we are just chasing ourselves at this poin.