If you follow this and the following video, the bolt-ons (header, cliff intake and big carburetor) added a 20 HP gain. The video creator was expecting 175 HP. He stated that there needs to be improvement in the head and cam to get more flow. This sounds like what previous posters have experienced. Then comes the porting, swirling, shaving, special cam and other tricks. It does give improvements but not as much bang for the buck.
The test doesn't show street-ability. Idle up to cruise. Stoplight to stoplight. Fuel mileage. Starting up on a frigid morning.
What's really funny in the following (3rd) video is that the engine started misfiring and they ran out of dyno time.
Later the misfire was found to be a worn-out set of points. They/he started the whole test without changing to a new set of points.
The test has to repeated to make sure the data is correct.
Last edited by buoymaker; 06/03/2021 1:33 AM.
