just got ahold of this photo.
new design Drag header it exits under the gear box where there is low pressure air


http://img20.exs.cx/my.php?loc...h.jpg

 

that seems to be a good idea, to have the flowing air "pull" the exhaust out of the header. But how would you simulate that when tuning? huge fan under the bumper?

 

you want the least bends as possible...reason for side exit. get the air out of the head as efficiently as you can with the least amount of bends and keep those bends from being sharp. equal length is a good thing as well. For the side exit drag racer having the header exit in front of the front wheels...there is turbulance and air fighting exhaust flow. How much? i don't know...i've never even thought of figuring it out if i could. In this case the header is flowing under the car still and dumping the air without all that turbulance.

 

At what MPH do you think the velocity under the car surpasses the velocity of the exhaust? Are you using turning vanes ? Velocity around the outside of a front valance usually has a higher velocity (lower pressure) at a lower MPH than the underneath of the car, unless you have done the whole tunnel thing, turning vanes.

 

I'm not certain how recent this photo is, but Bisimoto has been designing/constructing headers using this concept for quite a long time. The bends on this piece don't seem to be at all softened over a traditional-style under-pan header, though they are less substantial than those on the Bisimoto piece. However, this doesn't appear to be an equal-length design like the Bisimoto, and packaging the equal length tubes is basically what necessitates the increased number of bends on that design.

 

Most dyno programs conducted these days have fans in exhaust ducting between the header collector exit and the mufflers to simulate the vacuum present under the car (or along-side the motorcycle). This isn't something new either.

 

Looks very Randy Monroe influinced...

For those who dont know Randy Monroe is the person who originally designed and developed the AN-R/Prosped/Ericks Racing/Elite Headers which were later built and sold by Steve Brown of Rage performance...

 

You would think there would be a better "scavaging" effect by having it exit directly to the side. Take a beer bottle, put smoke in it, and blow accross the top. The fast moving air going over the top of the bottle will create a low pressure area and suck the smoke out of the bottle. Think of a side exit header with air moving past at 100 mph.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">

Looks very Randy Monroe influinced...

For those who dont know Randy Monroe is the person who originally designed and developed the AN-R/Prosped/Ericks Racing/Elite Headers which were later built and sold by Steve Brown of Rage performance...</TD></TR></TABLE>

must have been a wonderful header for it to take all of them to make it. lol. jk

you can tell its hytechs older side exit header with a different end to it changing its exit path...nothing more but is it the right solution?


http://img19.exs.cx/img19/9180/cheetah1.jpg

http://www.hytechexhaust.com/h...g.htm

 

so could that be used as a street header as well?

 

i'm sure you'd need to bend the exhaust end back toward under the center of the car....but more then likely yes. Not so sure if you can use AC with this setup...it doesn't appear that your able. I like the bung location for on the fly o2/AF readings.

 

well, it's an attractive header. i'm sure it might even make as much power as an AN-R...but unless they come off their regular price...i don't see it being THAT popular, just liek their current offerings

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">

Looks very Randy Monroe influinced...

For those who dont know Randy Monroe is the person who originally designed and developed the AN-R/Prosped/Ericks Racing/Elite Headers which were later built and sold by Steve Brown of Rage performance...</TD></TR></TABLE>

LOl I don't think much of John at hytech's stuff is influenced by anybody.

I think he would be more of on the leading edge so to speak.

I see more ppl out there immitating his style then anyone else

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">

Looks very Randy Monroe influinced...

For those who dont know Randy Monroe is the person who originally designed and developed the AN-R/Prosped/Ericks Racing/Elite Headers which were later built and sold by Steve Brown of Rage performance...</TD></TR></TABLE>

What a beautiful header, look at that merge collector. I would buy this over a Bisi/AN-R header any day.

 

i find it quite funny on this board how hytech and smsp headers are being spoken on the same breath as those spaghetti headers.

these headers are not made for the masses.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">but Bisimoto has been designing/constructing headers using this concept for quite a long time.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote"> However, this doesn't appear to be an equal-length design like the Bisimoto </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">
Looks very Randy Monroe influinced...
</TD></TR></TABLE>

ummmm. that would be: wrong, wrong, and wrong.

3 strikes. you're out.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">
LOl I don't think much of John at hytech's stuff is influenced by anybody.
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">
I think he would be more of on the leading edge so to speak.
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">
I see more ppl out there immitating his style then anyone else
</TD></TR></TABLE>

correct, correct, and correct.

ok, you can stay.

 

I know I should be contacting John directly...and I will....but quick question...how is his turn around time? I'm very interested in a hytech header.

 

depends if your local or not and what he is working on. sometimes he's doing runs of toyota atlantic headers or lamborghini headers or ferrari etc. it really depends

 

Yeah, its a-o-k header, lol.

Well, it appears I'll be on the waiting list in the next up coming months .

 

Yeah, Hytech makes a good header. Now lets get back on the original topic of if this design actually works better than a regular side exit or if its just for a street car with exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TECH43 RACING INC. &raquo;</TD></TR><TR><TD CLASS="quote">
ummmm. that would be: wrong, wrong, and wrong.

3 strikes. you're out.
</TD></TR></TABLE>

Only two of those statements were mine, so I'll only comment on them. First, it is certainly possible that the Hytech piece is equal-length. I simply stated that it didn't immediately appear to be, and accurately determining the length of each primary simply by examining the photo is somewhat difficult.

With regard to the Bisimoto piece, how was my statement incorrect? Bisimoto has indeed designed and constructed an equal-length header with an exit that is intended to take advantage of pressure differentials located beneath the car to assist exhaust scavenging. My statement was that "Bisimoto has been designing/constructing headers using this concept for quite a long time", which he has.

A photo of the Bisimoto header I reference, and a link to some information regarding its design and construction:

Bisimoto Headers Info

 

quite a long time?

lets see, bisi started getting custom headers made for himself about 2.5 years ago.

hytech has been in business since 1984, but building headers before that.

in 1984, bisi was 12.

i guess I have a different opinion on the definition of: "quite a long time"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TECH43 RACING INC. &raquo;</TD></TR><TR><TD CLASS="quote">quite a long time?

lets see, bisi started getting custom headers made for himself about 2.5 years ago.

hytech has been in business since 1984, but building headers before that.

in 1984, bisi was 12.

i guess I have a different opinion on the definition of: "quite a long time"</TD></TR></TABLE>

My comment had nothing to do with how long either company has been in the business of designing and constructing headers. Lip's original post was specifically regarding this header, with an implication (whether intentional or not) that it was a new and/or original design concept. Again, I stated that Bisimoto had been using this very concept for "quite a long time". In the context of novel header designs and concepts, 2.5 years is, in my opinion, "quite a long time."

I'd imagine that if a discussion arose about some "new" long-tube Honda B-series header, numerous Hytech proponents might feel inclined to comment that John had been using such a design for "quite a long time", when in reality, by your definition he hasn't. I suppose then, that it's all relative.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ranta18 &raquo;</TD></TR><TR><TD CLASS="quote">You would think there would be a better "scavaging" effect by having it exit directly to the side. Take a beer bottle, put smoke in it, and blow accross the top. The fast moving air going over the top of the bottle will create a low pressure area and suck the smoke out of the bottle. Think of a side exit header with air moving past at 100 mph.</TD></TR></TABLE>

that might be true for air that's sitting still in a bottle, but exhaust gas pulse exiting the header probably at almost supersonic speed(depending on how long the header is). how will it be effected by a cross wind of 100+mph. i'm not clamming to be a physicist, just pointing out some consideration.

 

I agree the exhaust exits at very high speeds. Whats the difference between exiting under the car vs out the side?