With the radiator cap off, do the bubbles ever quit?

My engnblder.com RV cam is the bomb.

Lots of low end and 105mph top end.

Could you catalytic converter be plugged? Just a thought.


Ralph

1991 Toyota 4x4 Standard Cab Pickup.
engnbldr cam and head.
Doug Thorley Headers
Home Made Cat Backs
30x9.5x15 BF Goodrich All-Terrain M/T KM2