Hytech replica header dyno test
03-02-2008, 11:10 AM
#1
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Hytech replica header dyno test
Lets just say I am VERY impressed with the numbers this header made on my setup. I know I have this graph posted in my build thread but I figured I'd make a new thread just for the header results so everyone could see them, not just the people viewing my build thread.
Setup:
B18c3 block (its equivalent to a JDM GSR, the pistons are p72-00)
stock p72 head
CTR intake cam, gsr exhaust cam
2.5" test pipe
apexi gt spec exhaust
Skunk2 intake manifold (first version, not pro series)
hondata heatshield IM gasket
spoon 2 layer headgasket
short ram intake
The compression is 10.83:1, calculated on zealautowerks.
This is a test of the popular DC "jdm itr" 4-1 header vs the new standard hytech replica header. There were NO other changes to the setup between runs, all runs were on the same dyno. The runs with the DC header were tuned, the hytech runs are running off that same tune, I'm sure with some tuning the hytech replica header would have made even more power.
Here are the results
Green is the DC 2.5" 4-1 "jdm itr" header, Red is the standard size hytech replica.
Review of the header:
Aside from making a huge power increase this header is also BEAUTIFUL!The welds look very good and the header slips together perfectly. Fitment is top notch and install went extremely smooth, the header is alot longer than the dc 4-1 but all you have to do is shorten the cat/test pipe to make it fit (thanks austin for cutting/welding for me). There is a ground clearance issue but thats to be expected with a header of this nature.
Setup:
B18c3 block (its equivalent to a JDM GSR, the pistons are p72-00)
stock p72 head
CTR intake cam, gsr exhaust cam
2.5" test pipe
apexi gt spec exhaust
Skunk2 intake manifold (first version, not pro series)
hondata heatshield IM gasket
spoon 2 layer headgasket
short ram intake
The compression is 10.83:1, calculated on zealautowerks.
This is a test of the popular DC "jdm itr" 4-1 header vs the new standard hytech replica header. There were NO other changes to the setup between runs, all runs were on the same dyno. The runs with the DC header were tuned, the hytech runs are running off that same tune, I'm sure with some tuning the hytech replica header would have made even more power.
Here are the results
Green is the DC 2.5" 4-1 "jdm itr" header, Red is the standard size hytech replica.
Review of the header:
Aside from making a huge power increase this header is also BEAUTIFUL!The welds look very good and the header slips together perfectly. Fitment is top notch and install went extremely smooth, the header is alot longer than the dc 4-1 but all you have to do is shorten the cat/test pipe to make it fit (thanks austin for cutting/welding for me). There is a ground clearance issue but thats to be expected with a header of this nature.
03-02-2008, 11:12 AM
#2
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (planes on treadmills)
I should have slid the cursor over to the spot where the biggest gains were made but I didn't realize that until I was already home. At around 8200 there was a 12whp gain and an 8wtq gain. 
03-02-2008, 11:21 AM
#3
Honda-Tech Member
Join Date: Mar 2007
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (planes on treadmills)
afr's must not be the same... 13:1 afr is a safe number not for max power. Do a real test then come back with results with both at same afr etc.. btw we all know the hy-tech copy is WAYYY better then the DC, still this shouldn't be called a test when u can throw at least 30 variables that are unaccounted for 
03-02-2008, 11:31 AM
#4
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (Chris Tune)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris Tune »</TD></TR><TR><TD CLASS="quote">afr's must not be the same... 13:1 afr is a safe number not for max power. Do a real test then come back with results with both at same afr etc.. btw we all know the hy-tech copy is WAYYY better then the DC, still this shouldn't be called a test when u can throw at least 30 variables that are unaccounted for </TD></TR></TABLE>
I fail.
I wasn't aware that everyone already knew the header was so good.
</TD></TR></TABLE>I fail.
I wasn't aware that everyone already knew the header was so good.
03-02-2008, 11:32 AM
#5
Honda-Tech Member
Join Date: Mar 2007
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (planes on treadmills)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by planes on treadmills »</TD></TR><TR><TD CLASS="quote">
I fail.
I wasn't aware that everyone already knew the header was so good.
</TD></TR></TABLE>
u didnt fail... you got more hp out yer car right?
thats all that matters in the end
I fail.
I wasn't aware that everyone already knew the header was so good.
</TD></TR></TABLE>
u didnt fail... you got more hp out yer car right?
thats all that matters in the end
03-02-2008, 11:40 AM
#6
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (Chris Tune)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris Tune »</TD></TR><TR><TD CLASS="quote">
u didnt fail... you got more hp out yer car right? thats all that matters in the end </TD></TR></TABLE>
Haha well at making a good test I did, but then again I wasn't aiming to make a perfect test of the two headers lol, just getting a base run before I ship my head off to CC .
Most of my friends that don't really delve into engine performance didn't believe me when I told them I expected the header to make around 8whp over the jdm 4-1. When they got back to the shop and I showed them the graphs they were amazed that a "just a header" could do so much................ricers these days......
u didnt fail... you got more hp out yer car right?
thats all that matters in the end </TD></TR></TABLE>Haha well at making a good test I did, but then again I wasn't aiming to make a perfect test of the two headers lol, just getting a base run before I ship my head off to CC
.Most of my friends that don't really delve into engine performance didn't believe me when I told them I expected the header to make around 8whp over the jdm 4-1. When they got back to the shop and I showed them the graphs they were amazed that a "just a header" could do so much................ricers these days......
03-02-2008, 11:45 AM
#7
Honda-Tech Member
Join Date: Mar 2007
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (planes on treadmills)
yeah i know... kids these days...
"you need a better header"
"but i got a header!"
"yes thats why i said a BETTER header"
"but i got a header already! its the same!"
FAIL
"you need a better header"
"but i got a header!"
"yes thats why i said a BETTER header"
"but i got a header already! its the same!"
FAIL
Trending Topics
03-02-2008, 11:48 AM
#8
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (Chris Tune)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris Tune »</TD></TR><TR><TD CLASS="quote">yeah i know... kids these days...
"you need a better header"
"but i got a header!"
"yes thats why i said a BETTER header"
"but i got a header already! its the same!"
FAIL </TD></TR></TABLE>
Lmao, you hit the nail on the head.
"you need a better header"
"but i got a header!"
"yes thats why i said a BETTER header"
"but i got a header already! its the same!"
FAIL
</TD></TR></TABLE>Lmao, you hit the nail on the head.
03-02-2008, 07:30 PM
#13
Honda-Tech Member
Join Date: Jul 2006
Location: VA
Posts: 860
Likes: 0
Received 0 Likes
on
0 Posts
Re: (planes on treadmills)
Damn man, nice to see huge gains like that. I put one on my teg but didn't get a chance to dyno it against another header though since I did everything at the same time on my build. I also got rid of my 4-1 copy header when making the change. Thanks for the dyno graph! Those headers are definately a steal for what you get.
03-02-2008, 07:41 PM
#14
Junior Member
Join Date: Sep 2007
Posts: 87
Likes: 0
Received 0 Likes
on
0 Posts
Re: (MARC P)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MARC P »</TD></TR><TR><TD CLASS="quote">I hope you tuned the new header after the graph you posted. If not I wouldnt drive around with those AF.
Marc P</TD></TR></TABLE>10.83:1 is not a lot of compression. 13-1 A/F is perfectly fine to drive around on.
My bad, lol, didn't see the red graph was at 18-1 A/F. I'd drive around on that with reduced timing for better mileage anyway.
Marc P</TD></TR></TABLE>10.83:1 is not a lot of compression. 13-1 A/F is perfectly fine to drive around on.
My bad, lol, didn't see the red graph was at 18-1 A/F. I'd drive around on that with reduced timing for better mileage anyway.
03-02-2008, 07:47 PM
#15
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: (TrippinBull)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TrippinBull »</TD></TR><TR><TD CLASS="quote">10.83:1 is not a lot of compression. 13-1 A/F is perfectly fine to drive around on.
My bad, lol, didn't see the red graph was at 18-1 A/F. I'd drive around on that with reduced timing for better mileage anyway. </TD></TR></TABLE>
Bahaha the o2 sniffer wasn't hooked up. Its sure as hell not at 18:1.
My bad, lol, didn't see the red graph was at 18-1 A/F. I'd drive around on that with reduced timing for better mileage anyway.
</TD></TR></TABLE>Bahaha the o2 sniffer wasn't hooked up. Its sure as hell not at 18:1.
03-02-2008, 09:13 PM
#17
Honda-Tech Member
Join Date: Jul 2006
Location: VA
Posts: 860
Likes: 0
Received 0 Likes
on
0 Posts
Re: (g1itchgsr)
I would think with his mods, the normal tri-y would be sufficient. I am running the standard tri-y with a 2-1/2" to 3" exhaust and muffler and am making north of 200whp.
03-03-2008, 02:38 AM
#18
Honda-Tech Member
Join Date: Mar 2003
Location: CLINIC
Posts: 1,159
Likes: 0
Received 0 Likes
on
0 Posts
Re: (g1itchgsr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by g1itchgsr »</TD></TR><TR><TD CLASS="quote">i wonder would you make more power with the big tube header....</TD></TR></TABLE>
Anyone have results from the header mentioned above?
Anyone have results from the header mentioned above?
03-03-2008, 05:46 AM
#19
Honda-Tech Member
Join Date: Feb 2007
Location: plantation, fl, usa
Posts: 3,118
Likes: 0
Received 0 Likes
on
0 Posts
Re: (turboZChatch)
anyone that has ran or owned a dyno before should know what the a/f read out looks like when the sniffer isnt hooked up...... 
graph would look all jacked up if it actually made a full pull at 18 to 1 a/f
graph would look all jacked up if it actually made a full pull at 18 to 1 a/f
03-03-2008, 06:17 AM
#20
Re: Hytech replica header dyno test (planes on treadmills)
Good post and great results.
This gives me great hope when I change from my DC 4-1 non JDM to a SMSP header. You gained nearly 9whp untuned. I would think 11-13whp tuned is possible. Keep us updated.
This gives me great hope when I change from my DC 4-1 non JDM to a SMSP header. You gained nearly 9whp untuned. I would think 11-13whp tuned is possible. Keep us updated.
03-03-2008, 06:22 AM
#21
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: (.CUBISH.)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .CUBISH. »</TD></TR><TR><TD CLASS="quote">anyone that has ran or owned a dyno before should know what the a/f read out looks like when the sniffer isnt hooked up......
graph would look all jacked up if it actually made a full pull at 18 to 1 a/f</TD></TR></TABLE>
yeah I also thought the sniffer not being hooked up was a given by taking one look at the af curve.
graph would look all jacked up if it actually made a full pull at 18 to 1 a/f</TD></TR></TABLE>
yeah I also thought the sniffer not being hooked up was a given by taking one look at the af curve.
03-03-2008, 06:26 AM
#22
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (OH_1fstgsr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OH_1fstgsr »</TD></TR><TR><TD CLASS="quote">Good post and great results.
This gives me great hope when I change from my DC 4-1 non JDM to a SMSP header. You gained nearly 9whp untuned. I would think 11-13whp tuned is possible. Keep us updated.</TD></TR></TABLE>
I remember you saying your gsr was making 174, you'll see great results from that SMSP, likely even better than mine were.
After I get the head back from being ported I'd like to throw the DC back on and see what it makes and then switch to the hytech just for fun to see how much the hytech gains with a much better flowing head over the DC.
to tri y
This gives me great hope when I change from my DC 4-1 non JDM to a SMSP header. You gained nearly 9whp untuned. I would think 11-13whp tuned is possible. Keep us updated.</TD></TR></TABLE>
I remember you saying your gsr was making 174, you'll see great results from that SMSP, likely even better than mine were.
After I get the head back from being ported I'd like to throw the DC back on and see what it makes and then switch to the hytech just for fun to see how much the hytech gains with a much better flowing head over the DC.
to tri y
03-03-2008, 06:45 AM
#24
STAR
Thread Starter
Join Date: Mar 2005
Location: Jamaica, MD
Posts: 4,682
Likes: 0
Received 0 Likes
on
0 Posts
Re: Hytech replica header dyno test (OH_1fstgsr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OH_1fstgsr »</TD></TR><TR><TD CLASS="quote">What are you tuning with? Crome or Hondata?</TD></TR></TABLE>
Uberdata
Uberdata