Dynoed my 427so Cobra today.... interesting to say the least!

[DAVID GAGNARD]

What Roger was saying about headers/fuel and other things on the engine dyno will make a lot of difference..............


For instance;when I dynoed my 331 cu in "race" motor, they told me to make sure I LEFT the water pump at home, the same with my mechanical fuel pump.........a water pump and mechanical fuel pump can "eat" 20 hp depending on their type!!!!!!!!!!!!

I had no choice about the water pump as that was the way the dyno was set-up(they had an electrical water pump,NO engine power loss there), but I did use my mechanical fuel pump and brought my own race gas and used my headers instead of the shop headers............once we made about 8 or so pulls and got the timing/fuel mixture right where it needed to be, I added my air filter and luckily for me only loss 2hp with my air filter........

I specifically used my fuel/fuel pump/headers/air filter cause that's the way it was to be run in my car and it would give me more accurate #'s, the main # I was worried about was the a/f ratio, changing air filters/headers can and will affect that # to some degree..........

Now I run the snot out of the little motor and do not worry about going lean and melting a piston.......I have not had the time to get the car on a chasis dyno, but plan to do so soon.......

David