DTR B-unit Vs. Hytech..
Thread Starter
Honda-Tech Member
Joined: Feb 2003
Posts: 1,917
Likes: 0
From: San Leandro, CA, USA
DTR B-unit Vs. Hytech..
I got a hold of hy-tech header wanted to see what my header would do against it toe to toe. Dyno tested with many witnesses who will vouch for the accuracy of the test..Thanks you Leo and Kurt for loaning me car and header to test..
Test motor was a
stock GSR Motor
skunk spring and retainers
skunk stage 1 cams
Blox GSR intake manifold
cold air intake
uberdata tuned
open exhuast
To keep it in a timely manner and as fair as possible we did header swaps with no tuning, This gives a general idea of how each header react to the motor combo. But definately there is way more in each header with some tinkering....
We did a 5 run lap for each header and pulled the best files out of each...
Green: Jdm type R
Red: DTR B-unit
Blue: Hytech
This is another Run that recorded a higher number on the Hytech header however it show we let off early But to keep it fair ill will post it as well
Red: hytech
Blue: DTR B-unit
Please dont post anything asking about prices because i dont want this thread deleted if you guys ave some tech question about the test or the header performance feel free to ask..
Stay tuned we will test this again on a higher output application
Modified by DTR-FAB at 10:41 PM 2/18/2005
Modified by DTR-FAB at 11:48 AM 2/20/2005
Test motor was a
stock GSR Motor
skunk spring and retainers
skunk stage 1 cams
Blox GSR intake manifold
cold air intake
uberdata tuned
open exhuast
To keep it in a timely manner and as fair as possible we did header swaps with no tuning, This gives a general idea of how each header react to the motor combo. But definately there is way more in each header with some tinkering....
We did a 5 run lap for each header and pulled the best files out of each...
Green: Jdm type R
Red: DTR B-unit
Blue: Hytech
This is another Run that recorded a higher number on the Hytech header however it show we let off early But to keep it fair ill will post it as well
Red: hytech
Blue: DTR B-unit
Please dont post anything asking about prices because i dont want this thread deleted if you guys ave some tech question about the test or the header performance feel free to ask..
Stay tuned we will test this again on a higher output application
Modified by DTR-FAB at 10:41 PM 2/18/2005
Modified by DTR-FAB at 11:48 AM 2/20/2005
B*a*n*n*e*d
Joined: Dec 2001
Posts: 8,185
Likes: 3
Thanks for posting this.
Simply put, basically, you both make good headers. I just think that the big difference in the 2 headers is the marketing. One is considered very good by those who know of it, the other is considered exceptional by people that have never seen it.
Nikos
Simply put, basically, you both make good headers. I just think that the big difference in the 2 headers is the marketing. One is considered very good by those who know of it, the other is considered exceptional by people that have never seen it.
Nikos
Trending Topics
Honda-Tech Member
Joined: Mar 2001
Posts: 4,295
Likes: 0
From: North East
Re: DTR B-unit Vs. Hytech.. (DTR-FAB)
Well , it just goes to show that the antireversion chambers on the Hytec dont affect power too much...I'll assume.. I know of another test done recently on a built 2.0 and the results were the same, one with the chambers and one without..
Either way, both works of art..
to you Danny and John G..
Danny , you up for letting me dyno one?
EDIT I was just informed that AR chambers are for low rpm (duh not sure why i didnt think of the theory behind it)so you wouldnt notice the gains on wot high rpm pulls
Modified by Tbone at 1:24 PM 2/19/2005
Either way, both works of art..
to you Danny and John G.. Danny , you up for letting me dyno one?
EDIT I was just informed that AR chambers are for low rpm (duh not sure why i didnt think of the theory behind it)so you wouldnt notice the gains on wot high rpm pulls
Modified by Tbone at 1:24 PM 2/19/2005
Honda-Tech Member
Joined: Sep 2002
Posts: 970
Likes: 1
From: all motor Toronto Canada, Canada
Re: DTR B-unit Vs. Hytech.. (clean rice)
I love my Hytech Header, I love to see these comparisons and a big to DTR as well as their header made great power.
Very Impressive
to DTR as well as their header made great power.Very Impressive
Honda-Tech Member
Joined: Mar 2002
Posts: 1,650
Likes: 0
From: Some Where, TX, USA
why doesnt the graph show your header comparing with the hytech below 3500rpm?
soemthing to do with the pulls or what?
Sorry Ima NewB to dyno tunning and how you can affect the graphs
Good work on the header its a beautiful thing!
soemthing to do with the pulls or what?
Sorry Ima NewB to dyno tunning and how you can affect the graphs
Good work on the header its a beautiful thing!
Honda-Tech Member
Joined: Aug 2002
Posts: 12,464
Likes: 0
From: NOR CAL
Re: (MI4DC2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MI4DC2 »</TD></TR><TR><TD CLASS="quote">good comparison..</TD></TR></TABLE>
Honda-Tech Member
Joined: Nov 2001
Posts: 1,827
Likes: 0
From: medium pimpin
Re: DTR B-unit Vs. Hytech.. (Tbone)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone »</TD></TR><TR><TD CLASS="quote">Well , it just goes to show that the antireversion chambers on the Hytec dont affect power too much...I'll assume.. I know of another test done recently on a built 2.0 and the results were the same, one with the chambers and one without..
Either way, both works of art.. to you Danny and John G..
Danny , you up for letting me dyno one? </TD></TR></TABLE>
it seems as though any difference is not so apparent on the dyno, but iirc, John said that on the track he did back-to-back runs with 2 identical headers, except that one had the chambers, and one didn't. the one w/out beat the other on the dyno every time, but the one with them won every time on the track. considering the fact that they look harder and more time consuming to include, and increase cost (patent royalties and cost passed onto customers), i don't think that John would go through the trouble (and perhaps lose more business due to cost) if they did so little.
my guess is that they make the biggest difference between points of lower/higher acceleration, e.g. on a road course where the throttle and load changes more often. since, as rpm decreases, each exhaust pulse also loses speed, when you let off of the throttle, say, going into a turn, perhaps the intake stroke actually pulls some the spent exhaust at lower speed (throttle closed, so less air/fuel) back into the chamber (reversion), which spoils some of the fresh intake charge, costing power and recovery time as you open the throttle and pull out of the turn. in drag racing, this would occur at each shift point. since the "stacking" of each exhaust pulse onto the last, slower pulse adds heat/expansion to it, when the pulse starts to revert, it's still expanding, so much of it finds its way into the outside of the AR chamber, it loses heat/velocity such that it can't make it back into the combustion chamber before the next, faster pulse pushes it back in the right direction.
granted, this is also why stepping the tubes helps, but maybe the chambers give the slight edge that some require- just as might angling the primaries at the flange to follow the port exit angle of each port and using 'D' shapes to maintain velocity and reduce separation/ turbulence in tighter bends.
at any rate, thanks for the test, and good work, Danny. i'd love to see another comparo on a 'built-to-the-hilt' combo like T-Bone's. plus, how can you deny a guy who prolly puts more cycles on his engine testing and sharing with the community than he does actually driving the car? Tbone. thanks. you've prolly done more to show/help/teach than 1/2 of us on HT combined.
Either way, both works of art..
to you Danny and John G.. Danny , you up for letting me dyno one? </TD></TR></TABLE>
it seems as though any difference is not so apparent on the dyno, but iirc, John said that on the track he did back-to-back runs with 2 identical headers, except that one had the chambers, and one didn't. the one w/out beat the other on the dyno every time, but the one with them won every time on the track. considering the fact that they look harder and more time consuming to include, and increase cost (patent royalties and cost passed onto customers), i don't think that John would go through the trouble (and perhaps lose more business due to cost) if they did so little.
my guess is that they make the biggest difference between points of lower/higher acceleration, e.g. on a road course where the throttle and load changes more often. since, as rpm decreases, each exhaust pulse also loses speed, when you let off of the throttle, say, going into a turn, perhaps the intake stroke actually pulls some the spent exhaust at lower speed (throttle closed, so less air/fuel) back into the chamber (reversion), which spoils some of the fresh intake charge, costing power and recovery time as you open the throttle and pull out of the turn. in drag racing, this would occur at each shift point. since the "stacking" of each exhaust pulse onto the last, slower pulse adds heat/expansion to it, when the pulse starts to revert, it's still expanding, so much of it finds its way into the outside of the AR chamber, it loses heat/velocity such that it can't make it back into the combustion chamber before the next, faster pulse pushes it back in the right direction.
granted, this is also why stepping the tubes helps, but maybe the chambers give the slight edge that some require- just as might angling the primaries at the flange to follow the port exit angle of each port and using 'D' shapes to maintain velocity and reduce separation/ turbulence in tighter bends.
at any rate, thanks for the test, and good work, Danny. i'd love to see another comparo on a 'built-to-the-hilt' combo like T-Bone's. plus, how can you deny a guy who prolly puts more cycles on his engine testing and sharing with the community than he does actually driving the car?
Tbone. thanks. you've prolly done more to show/help/teach than 1/2 of us on HT combined.
Honda-Tech Member
Joined: Mar 2003
Posts: 4,027
Likes: 0
From: Greenville, SC
Re: (B16C1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16C1 »</TD></TR><TR><TD CLASS="quote">no disrespect to anybody, but, without tuning, this test is irrelivant. IMHO</TD></TR></TABLE>
Agreed. The plots aren't showing for me right now. Can you also post the a/f for each?
Agreed. The plots aren't showing for me right now. Can you also post the a/f for each?
Re: (B16C1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16C1 »</TD></TR><TR><TD CLASS="quote">no disrespect to anybody, but, without tuning, this test is irrelivant. IMHO</TD></TR></TABLE>
Honda-Tech Member
Joined: Nov 2003
Posts: 1,625
Likes: 2
From: T dot, O, Hemp Nation
Re: (B16C1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16C1 »</TD></TR><TR><TD CLASS="quote">no disrespect to anybody, but, without tuning, this test is irrelivant. IMHO</TD></TR></TABLE>
start tweekin!
start tweekin!
Thread Starter
Honda-Tech Member
Joined: Feb 2003
Posts: 1,917
Likes: 0
From: San Leandro, CA, USA
Re: (Chillinit)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chillinit »</TD></TR><TR><TD CLASS="quote">
start tweekin! </TD></TR></TABLE>
Is there a thrid party that would like to do the testing im open to doing it fairly..
start tweekin!
</TD></TR></TABLE>Is there a thrid party that would like to do the testing im open to doing it fairly..
Honda-Tech Member
Joined: May 2004
Posts: 1,136
Likes: 0
From: Kansas city
Re: (DTR-FAB)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DTR-FAB »</TD></TR><TR><TD CLASS="quote">Is there a thrid party that would like to do the testing im open to doing it fairly..</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone »</TD></TR><TR><TD CLASS="quote">Danny , you up for letting me dyno one?
</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone »</TD></TR><TR><TD CLASS="quote">Danny , you up for letting me dyno one?
</TD></TR></TABLE>
Member
Joined: Feb 2003
Posts: 1,076
Likes: 0
Re: (DTR-FAB)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DTR-FAB »</TD></TR><TR><TD CLASS="quote">
Is there a thrid party that would like to do the testing im open to doing it fairly..</TD></TR></TABLE>
I'd love to but I'm stuck here in Chicago....
Is there a thrid party that would like to do the testing im open to doing it fairly..</TD></TR></TABLE>
I'd love to but I'm stuck here in Chicago....
Honda-Tech Member
Joined: Mar 2001
Posts: 4,295
Likes: 0
From: North East
Re: DTR B-unit Vs. Hytech.. (slofu)
Slofu.. you wasted your breath..look at the edit I had made to my own post and the time you had posted your responce..lol Great minds think alike..lol I realized it and went back to edit , while you were typing your responce..lol
I guess I'm not 3rd party qualified..
I guess I'm not 3rd party qualified..
Thread Starter
Honda-Tech Member
Joined: Feb 2003
Posts: 1,917
Likes: 0
From: San Leandro, CA, USA
Re: DTR B-unit Vs. Hytech.. (Tbone)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone »</TD></TR><TR><TD CLASS="quote">Slofu.. you wasted your breath..look at the edit I had made to my own post and the time you had posted your responce..lol Great minds think alike..lol I realized it and went back to edit , while you were typing your responce..lol
I guess I'm not 3rd party qualified.. </TD></TR></TABLE>
You are PM me..
Modified by DTR-FAB at 2:57 PM 2/19/2005
I guess I'm not 3rd party qualified..
</TD></TR></TABLE>You are PM me..
Modified by DTR-FAB at 2:57 PM 2/19/2005