open header slower?
Newbie
Joined: May 2009
Posts: 7
And you do not have to tune for open headers... RARELY will opening the exhaust as such create a lean condition the motor can't immediately counter. I've ran open headers on my race cars since I started when I was 14 (I'm 19 now) and I've never burnt a valve. That's usually something you only run into on a boosted car, not an N/A one.
Phil
Lol thanks Rob. I was just really tired and had no idea if I was making sense lol.
And yes, you are correct on that Phil. A carbeureted motor only responds to the incoming air and has nothing to correct fuel trims after the fact if it can't spit enough fuel. It's all good though man. Even lending a little knowledge here and there can help any rookie. Hell we've all been a rookie before, we know how it is
And yes, you are correct on that Phil. A carbeureted motor only responds to the incoming air and has nothing to correct fuel trims after the fact if it can't spit enough fuel. It's all good though man. Even lending a little knowledge here and there can help any rookie. Hell we've all been a rookie before, we know how it is
Newbie
Joined: May 2009
Posts: 22
From: Marengo IN
The thing about the knock sensors is true as well. The problem with that is that the ECM will take out timing to compensate. Run some equal size pipes off your headers and you will help the knock sensors and gain some low end too. And still gain in the top as well.
Keep the pipes the same diameter as the collectors and back about 36". It a trick some of the better engine builder use in circle track racing. We have to build our own headers just to get what we need for each engine. We have even figured out how to run full exhaust( fairly quiet almost) with less than 1% power loss!
Keep the pipes the same diameter as the collectors and back about 36". It a trick some of the better engine builder use in circle track racing. We have to build our own headers just to get what we need for each engine. We have even figured out how to run full exhaust( fairly quiet almost) with less than 1% power loss!
Overdrive Member
Joined: Nov 2006
Posts: 4,042
From: IL
BACKPRESSURE IS RETARDED. READ MY POST AND IT TELLS YOU EXACTLY WHAT MAKES IT "LOSE" POWER! Damned idiots... Back pressure is a retarded concept made up by people who don't know anything about how an engine or any kind of pump actually works
The thing about the knock sensors is true as well. The problem with that is that the ECM will take out timing to compensate. Run some equal size pipes off your headers and you will help the knock sensors and gain some low end too. And still gain in the top as well.
Keep the pipes the same diameter as the collectors and back about 36". It a trick some of the better engine builder use in circle track racing. We have to build our own headers just to get what we need for each engine. We have even figured out how to run full exhaust( fairly quiet almost) with less than 1% power loss!
Keep the pipes the same diameter as the collectors and back about 36". It a trick some of the better engine builder use in circle track racing. We have to build our own headers just to get what we need for each engine. We have even figured out how to run full exhaust( fairly quiet almost) with less than 1% power loss!