nitrious

[d112crzy]

I think his headers are as close to a race header as they come for our engines and the least we can do is satisfied that he even went out and made them spec for the cb7 chassis and not the EF chassis since his kits are for F2D Ef89. The stich header is probly custom made for that chassis of course it wont be like the cb7.

What exactly is a "race header"? Are there "daily driving" headers as well? I always thought it was either a performing header, or not.

[batever]

What exactly is a "race header"? Are there "daily driving" headers as well? I always thought it was either a performing header, or not.

Hmmm not sure if I should jump in here, this sounds a little like a conversation that actually started way before this actual thread.

Well , my understanding of a "performing header" or a performing anything is that it really depends on what your performance goals are. A fully race tuned engine, (illegal on the street), would be extremely awkward to drive around town, with in some cases little power at lower rpms and an oversensitive throttle making slow speed driving jerky and uncomfortable for one. And certainly a fully race tuned build would include a header optimized for that specific build and the goals of track racing, as opposed to a stock header that is basically optimized for driving around town and on the highway at speeds generally below 85 mph and having a smooth power band starting around 2000 rpms.

Definitely there are different headers (different builds) for different purposes.
A stock motor would lose at the track every time. Yet it would probably last 10-20x as long without serious maintenance as a full race build motor that is run at the edge of the mechanical and technical limits solely to gain maximum hp and to win races.

[d112crzy]

So then bisi doesn't sell a race header, by your definition as it should even do well on a stock f22. Even cisco's build is not a race motor, so he couldn't possibly have a race header.

[batever]

So then bisi doesn't sell a race header, by your definition as it should even do well on a stock f22. Even cisco's build is not a race motor, so he couldn't possibly have a race header.

I don't know about all those builds, really, which is why maybe I shouldn't have jumped into this thread, plus it seems clear to me that you have a lot of actual physical experience building engines for performance, while I don't have any at all. ( I haven't gone much beyond just reading A. Bell's books on engine tuning and on forced induction.) I'm just saying that performance is on a continuum between a build (stock) used just to get the groceries, drop off the kids, and drive to work for 15 years straight and an extreme drag race build that may blow in one weekend. And a header optimized for the track will not be the best, or might be overkill, for other purposes, although it MIGHT be okay for them.

{edit--d112crzy, I just realized you are talking about exhaust, while I was thinking intake and throttle body stuff--so I'm guessing that having a more efficient exhaust header that can handle high exhaust flow as in a large bored NA engine or in a turboed/forced induction setup would be just as good and have many benefits for a stock engine as well, even though the average driver wouldn't care to invest in one. This of course obviates most of my previous comments. }