Samurai_Blue
Yolo Whippin'
A header is a critical point in motor building and tuning, period. A crappy header will destroy your hard work and all the money spent building your motor and tuning it. This thread is informative on why buying a good header vs getting a knock off ie. Hytech replica or SSR replicas or anything of that nature as well as go over some critical header information.
Try Y vs 4-1 header
Try Y is basically a 4-2-1 design. The 4 exhaust ports are split into 2 Y shaped tubes and then merged into another Y and then to the collector making 3 Y shapes in the header. Whats the difference between the two? Well, first off the design of the Try-Y is commonly thought to create more midrange torque while the 4-1 design creates high end power. This is true in many aspects, but both headers will make numbers through the rev range while they concentrate in either mid or high revs. The design of a header as well as the quality will affect the power gains, This is why a DC header will never out perform a genuine Hytech header (graph below). This is because everything should be taken into consideration when choosing a header especially collector length as well as the following cat or test pipe and exhaust and muffler. Now, below i have attached some information from Honda Tuning Magazine which tested a B16A motor, mildly built, with stock, try-y and a 4-1 Header:
(http://www.hondatuningmagazine.com/tech/htup_0804_honda_header_tri_y_vs_4_into_1_dyno_test/airmass_tri_y_header_install.html" onclick="window.open(this.href);return false
Engine: B16A
Block:
forged rods and OEM replacement forged pistons by Probe Racing
Head:
Milled and hand ported
Crane Stage 1 cams
Holly adjustable Cam gears
AEM fuel rail
Holly 68mm TB
tuned on hondata
stock exhaust
Dyno Data: Stock vs. Tri-Y 4-Into-1 (Horsepower)
RPM Stock Tri-Y 4-1
4,000 84 84 85
4,500 101 101 101
5,000 115 116 114
5,500 137 138 134
6,000 150 151 150
6,500 165 167 167
7,000 181 184 185
7,200 191 193 196
7,500 194 199 202
7,700 195 201 204
8,000 191 196 198
8,500 186 192 193
Replica vs Real Deal
Now there is much debate over what header to get, replica hytech or the real one or just a plain old DC header. Heres a comparison between a few popular headers: (http://honda-tech.com/showthread.php?t=1690447#22842718" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false
closer view of the numbers produced
the above pictured dyno graphs were done on a build B20 Vtec drag motor. What about a Stock motor? Below is a stock motor with just header modifications and tunining. (http://sccaforums.com/forums/thread/264920.aspx" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false
Quality of header
Replica headers are cheaper than the real thing, hytech replicas go for about 300$ while the real hytech goes for 1000+ whats the difference?
Kiddracing header (http://www.8thcivic.com/forums/header-discussion/191514-hytech-replica.html" onclick="window.open(this.href);return false
vs K series hytech
Try Y vs 4-1 header
Try Y is basically a 4-2-1 design. The 4 exhaust ports are split into 2 Y shaped tubes and then merged into another Y and then to the collector making 3 Y shapes in the header. Whats the difference between the two? Well, first off the design of the Try-Y is commonly thought to create more midrange torque while the 4-1 design creates high end power. This is true in many aspects, but both headers will make numbers through the rev range while they concentrate in either mid or high revs. The design of a header as well as the quality will affect the power gains, This is why a DC header will never out perform a genuine Hytech header (graph below). This is because everything should be taken into consideration when choosing a header especially collector length as well as the following cat or test pipe and exhaust and muffler. Now, below i have attached some information from Honda Tuning Magazine which tested a B16A motor, mildly built, with stock, try-y and a 4-1 Header:
(http://www.hondatuningmagazine.com/tech/htup_0804_honda_header_tri_y_vs_4_into_1_dyno_test/airmass_tri_y_header_install.html" onclick="window.open(this.href);return false
Engine: B16A
Block:
forged rods and OEM replacement forged pistons by Probe Racing
Head:
Milled and hand ported
Crane Stage 1 cams
Holly adjustable Cam gears
AEM fuel rail
Holly 68mm TB
tuned on hondata
stock exhaust
Dyno Data: Stock vs. Tri-Y 4-Into-1 (Horsepower)
RPM Stock Tri-Y 4-1
4,000 84 84 85
4,500 101 101 101
5,000 115 116 114
5,500 137 138 134
6,000 150 151 150
6,500 165 167 167
7,000 181 184 185
7,200 191 193 196
7,500 194 199 202
7,700 195 201 204
8,000 191 196 198
8,500 186 192 193
Replica vs Real Deal
Now there is much debate over what header to get, replica hytech or the real one or just a plain old DC header. Heres a comparison between a few popular headers: (http://honda-tech.com/showthread.php?t=1690447#22842718" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false
closer view of the numbers produced
the above pictured dyno graphs were done on a build B20 Vtec drag motor. What about a Stock motor? Below is a stock motor with just header modifications and tunining. (http://sccaforums.com/forums/thread/264920.aspx" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false
Quality of header
Replica headers are cheaper than the real thing, hytech replicas go for about 300$ while the real hytech goes for 1000+ whats the difference?
Kiddracing header (http://www.8thcivic.com/forums/header-discussion/191514-hytech-replica.html" onclick="window.open(this.href);return false
vs K series hytech