SavageSS27 said:
the 25HP that they're picking up, is that at the wheels? or are they taking a number off of the dyno and calculating it to guess what they got at the crank? Or did they just pull the whole engine and put it on an engine dyno? It would be easy to get 235 out of the 3.7 at the crank if you ripped it out, stuck it on an engine dyno, threw your headers on it and just "forgot" to put a muffler on and such. I'm not saying that i doubt the results, hell i'd LOVE to get 25 RWHP for $600.00, i just want to know how they did their testing.
Wow... calm down. I'm just letting you know. I'm probably going to be one of the first people to get them on, and as soon as I do I'll let everyone know. But I have no reason to doubt the guy. But it's an average gain, Average meaning several vehicles, and the gain you have at the rear wheels. Don't forget the %25 reduction for drivetrain. And the results are from Liberty owner test vehicles, probably with different mods like exhaust and intakes or who knows.
The guy knew I already had ordered them, he didn't have to sell me on the product.
Personally, I feel for coated headers it's going to be more like 20hp. But with the right conditions, you could get 25.
Lean into the engine and take a look at what is considered exhaust headers on all vehicles. 3 or 4 pipes, cast iron, shoved into one Y connection. Freeway speeds, the exhaust is forced together making a backpressure in the engine. Exhaust headers are one of the oldest and best ways to make HP and torque.
The best way to explain this is to breathe and exhale through a straw all day, don't forget to run. Then get rid of the straw, that's your engine on headers and a intake.