sorry if its a repost but I searched and I didnt find much about this headers

pick up about 55 whp without any internal modifications




Yeah that is right. 247rwhp N/A out of a K20. Yes I said Rear wheel HP


what the guy said about his headers on another forum
"As you can see in the photos of my new Prototype Racing stainless steel equal length 4-2-1 exhaust header for the Honda K20A in the Elise, it certainly isn't easy to build. An easier route would've been to design a shorter header that would make more top-end power, but a nice broad torque curve is more important, and that's what I designed this one to produce. I had to wait many months to finally get the proper radius bends with which to bring the image in my mind into reality. Previously I used the first section of the Japanese Type R exhaust header, and built onto it to get the proper overall length, but the tube size and rather short primaries were hurting torque production. Look at the new Dyno curves, and you'll see what I mean. I'm quite pleased with the way this "hot snake orgy" works, and even though it's extremely expensive to produce, it will be the standard exhaust header included in the K20A kit, and will bolt right up to your existing CAT or replacement pipe. We made substantial changes in ECU mapping for fuel and cam angle phasing to compliment the header design, and that mapping is available as part of the Hondata ECU upgrade, and immobiliser deletion.

Considering that we started with an engine rated by Honda at 220 HP @ 8,000 RPM (measured at the crankshaft), I think we've done quite well in broadening the torque curve substantially, and producing approximately 55 more HP at a lower RPM with no internal modification to the engine. This was accomplished using the standard Exige silencer, and running the engine on 91 Octane fuel. At this point I think we've come to the end of the first phase in the tuning of the K20A. The next phase will include new cams and reshaping the intake and exhaust ports to provide us with superior airflow. I'll concentrate my efforts on letting the engine breathe better before I start changing pistons, etc. "

from prototype racing inc's site

 

Wow.

That motor in an Elise must be incredible.

 

thats a header masterpiece

 

Ahh, the old equal length controversy.

Don't get too excited. I don't think you're going to be able to fit this on a DC5 or EP3, and the gains could be lost in an exhaust system that must by necessity be much, much longer than the exhaust system in an Elise that is driven solely on the track.

I'm curious, though, why we don't see more headers like this.

You'd think that if they were practical in daily application that we'd see more of them, even if they cost $2000.

 

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

That motor in an Elise must be incredible.</TD></TR></TABLE>

what he said ^^^

 

you mean front wheel HP, not rear wheel :D

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blouisgod &raquo;</TD></TR><TR><TD CLASS="quote">you mean front wheel HP, not rear wheel :D</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGSR &raquo;</TD></TR><TR><TD CLASS="quote">Yeah that is right. 247rwhp N/A out of a K20. Yes I said Rear wheel HP</TD></TR></TABLE>

reading &gt; joo

j/k

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blouisgod &raquo;</TD></TR><TR><TD CLASS="quote">you mean front wheel HP, not rear wheel :D</TD></TR></TABLE>
no dummy RWHP.
Lotus doesn't make a front wheel drive.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by orion840 &raquo;</TD></TR><TR><TD CLASS="quote">The Sauce is weak with this one.</TD></TR></TABLE>

 

lol at this guy... haha gawd, the elises are sooo nice, mod-a-car in pleas has like 2 of em... they have cranked those things so high in terms of power, and told me the hit like 1.3gs in turns... 1.3! but yea, that is a damn nice header... wish it would help us out though =/

 

K20 Elise will replace my ITR if it ever gets stolen.

 

seen this in person. it's a work of art. it's from Prototype racing.

 

it looks like something out of an anatomy book.

 

I read this and was pretty impressed

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGSR &raquo;</TD></TR><TR><TD CLASS="quote">pick up about 55 whp without any internal modifications </TD></TR></TABLE>

then i scrolled down and read this

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGSR &raquo;</TD></TR><TR><TD CLASS="quote">We made substantial changes in ECU mapping for fuel and cam angle phasing to compliment the header design, and that mapping is available as part of the Hondata ECU upgrade, and immobiliser deletion.
</TD></TR></TABLE>

People are doing this already just like the people in your post.

Hondata/Full Exhaust/Hondata intake manifold gasket

Might i add they arent using a $2000 dollar prototype header.

 

Good LORD

 

interesting on how you pair this vs say a B-series n/a

 

damn

 

I dont think that would fit in a honda, furtermore I dont see how all that is nec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ross R &raquo;</TD></TR><TR><TD CLASS="quote">K20 Elise will replace my ITR if it ever gets stolen.</TD></TR></TABLE>
K20 Elise will replace my ITR WHEN it gets stolen.

 

This header idea,variants or improvements. have been around since the early 60s. Some kinda work ,but most are netural or tiny gain. if i can find it i will post a pic of a (real) hemi with "equal tube" headers! Ha Ha!!!!!!!!!!!!!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TyPe-R6 &raquo;</TD></TR><TR><TD CLASS="quote">Good LORD </TD></TR></TABLE>

 

do you really need it to be that whindy? or does it even affect performance

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R &raquo;</TD></TR><TR><TD CLASS="quote">I read this and was pretty impressed

then i scrolled down and read this

People are doing this already just like the people in your post.

Hondata/Full Exhaust/Hondata intake manifold gasket

Might i add they arent using a $2000 dollar prototype header.
</TD></TR></TABLE>

yea what he said

 

does this header cost much?

 

that is a crazy lookin header i like it

 

i bet it will cost a pretty penny. It gave me a boner, but 55 whp is kinda misleading. They did extensive ECU tuning to get that. Thats probably with no exhaust to slow it down. Im pretty sure you can spend less $ then they want for that header and make about the same HP.