Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ???
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From: FL, USA
Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ???
from dynos i've seen in the past, there are little areas where the comptech seems to have more power in the mid-range....but it's over such a small rpm range.
by actual driving comparisons....does the comptech feel like it has more mid-range?
i drive alot of highway and this is where my rpms sit, so it would be nice to know.
thanks!
by actual driving comparisons....does the comptech feel like it has more mid-range?
i drive alot of highway and this is where my rpms sit, so it would be nice to know.
thanks!
Joined: Aug 2003
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From: Warning, gRand Return imminent,, NY, USA
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (TypeRuz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TypeRuz »</TD></TR><TR><TD CLASS="quote">from dynos i've seen in the past, there are little areas where the comptech seems to have more power in the mid-range....but it's over such a small rpm range.
by actual driving comparisons....does the comptech feel like it has more mid-range?
i drive alot of highway and this is where my rpms sit, so it would be nice to know.
thanks!</TD></TR></TABLE>
Im fairly new to this board also, but guy, you gotta start searchin' all the info is there
And to answer your question I have a factory installed comptech 4-2-1 and i've driven a buddy's ITR with a JDM 4-1. Everytime I get in his I wanna steal his header, semms like it pulls far more mid to high range then my comptech.
by actual driving comparisons....does the comptech feel like it has more mid-range?
i drive alot of highway and this is where my rpms sit, so it would be nice to know.
thanks!</TD></TR></TABLE>
Im fairly new to this board also, but guy, you gotta start searchin' all the info is there
And to answer your question I have a factory installed comptech 4-2-1 and i've driven a buddy's ITR with a JDM 4-1. Everytime I get in his I wanna steal his header, semms like it pulls far more mid to high range then my comptech.
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From: German Ambassador, Hessen
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (opie112)
The question itself makes no sense imho...
What car are you driving ? Answer: Integra Type R
What is the rpm range the R starts to be an R ? Answer: 6k+
What is the rpm range that has to be improved if you want better racing results ? Answer: 6k+
You are driving highway and need more power from 3 to 6k ? Go turbo or get another car. The ITR never will have a midrange powerband (all motor).
You should focus a good high-end power. Forget your midrange issues.
What car are you driving ? Answer: Integra Type R
What is the rpm range the R starts to be an R ? Answer: 6k+
What is the rpm range that has to be improved if you want better racing results ? Answer: 6k+
You are driving highway and need more power from 3 to 6k ? Go turbo or get another car. The ITR never will have a midrange powerband (all motor).
You should focus a good high-end power. Forget your midrange issues.
Joined: Aug 2003
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From: Warning, gRand Return imminent,, NY, USA
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (ITR5874)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR5874 »</TD></TR><TR><TD CLASS="quote">What car are you driving ? Answer: Integra Type R
What is the rpm range the R starts to be an R ? Answer: 6k+
What is the rpm range that has to be improved if you want better racing results ? Answer: 6k+
You are driving highway and need more power from 3 to 6k ? Go turbo or get another car. The ITR never will have a midrange powerband (all motor).
You should focus a good high-end power. Forget your midrange issues.
</TD></TR></TABLE>
Yes
What is the rpm range the R starts to be an R ? Answer: 6k+
What is the rpm range that has to be improved if you want better racing results ? Answer: 6k+
You are driving highway and need more power from 3 to 6k ? Go turbo or get another car. The ITR never will have a midrange powerband (all motor).
You should focus a good high-end power. Forget your midrange issues.
</TD></TR></TABLE>
Yes
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Joined: Sep 2003
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From: FL, USA
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (opie112)
ok,
just tell me this...
does the JDM 4-1 feel a little sluggish before 4500 rpms compared to the stock header?
the reason this is a big deal to me is b/c when i got my car used it came with a DC Sports non-JDM 4-1 header and i hated it. i put the stock header back on since, and even though i know i lost some upper power, the low-end up to about 4500 rpms feels so much better and responsive.
of course, that was a non-JDM 4-1 header, but i'm just wondering if all 4-1's lose low-end in exchange for that uper rpm grunt.
just tell me this...
does the JDM 4-1 feel a little sluggish before 4500 rpms compared to the stock header?
the reason this is a big deal to me is b/c when i got my car used it came with a DC Sports non-JDM 4-1 header and i hated it. i put the stock header back on since, and even though i know i lost some upper power, the low-end up to about 4500 rpms feels so much better and responsive.
of course, that was a non-JDM 4-1 header, but i'm just wondering if all 4-1's lose low-end in exchange for that uper rpm grunt.
Joined: Aug 2003
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From: Warning, gRand Return imminent,, NY, USA
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (TypeRuz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TypeRuz »</TD></TR><TR><TD CLASS="quote">ok,
just tell me this...
does the JDM 4-1 feel a little sluggish before 4500 rpms compared to the stock header?
the reason this is a big deal to me is b/c when i got my car used it came with a DC Sports non-JDM 4-1 header and i hated it. i put the stock header back on since, and even though i know i lost some upper power, the low-end up to about 4500 rpms feels so much better and responsive.
of course, that was a non-JDM 4-1 header, but i'm just wondering if all 4-1's lose low-end in exchange for that uper rpm grunt.</TD></TR></TABLE>
You will lose some low end with a JDM 4-1
just tell me this...
does the JDM 4-1 feel a little sluggish before 4500 rpms compared to the stock header?
the reason this is a big deal to me is b/c when i got my car used it came with a DC Sports non-JDM 4-1 header and i hated it. i put the stock header back on since, and even though i know i lost some upper power, the low-end up to about 4500 rpms feels so much better and responsive.
of course, that was a non-JDM 4-1 header, but i'm just wondering if all 4-1's lose low-end in exchange for that uper rpm grunt.</TD></TR></TABLE>
You will lose some low end with a JDM 4-1
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From: German Ambassador, Hessen
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (opie112)
Dude,
that`s only maths.... not that hard to think the facts over...
Low end revs means low amount of air goes through... a thin 421 header performs here better because the ideal pressure can be achieved in the midrange... If you push up the revs, the amount of waste gets higher and the same thin header has got problems to handle that much air... Growing backpressure is what follows.. The engine`s power output at upper revs is limited.
If you choose a 2,5`` header it`s just the other way round...
The air-quantity gets through at low-mid revs, but the air-velocity is too low...
But if you kick it at high revs, the high amount of air can be handled by the big header and the velocity is optimal at high revs..
that`s only maths.... not that hard to think the facts over...
Low end revs means low amount of air goes through... a thin 421 header performs here better because the ideal pressure can be achieved in the midrange... If you push up the revs, the amount of waste gets higher and the same thin header has got problems to handle that much air... Growing backpressure is what follows.. The engine`s power output at upper revs is limited.
If you choose a 2,5`` header it`s just the other way round...
The air-quantity gets through at low-mid revs, but the air-velocity is too low...
But if you kick it at high revs, the high amount of air can be handled by the big header and the velocity is optimal at high revs..
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (TypeRuz)
Search. Keywords "The Great Header Test"
Has dyno comparisons of the USDM, JDM, Comptech and MANY more on an ITR
Has dyno comparisons of the USDM, JDM, Comptech and MANY more on an ITR
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From: Largo, Fl
Re: Does the Comptech 4-2-1 definetely have more mid-range than JDM 4-1 ??? (TypeRuz)
I gained power and tq everywhere with a Mugen 4-1 header, which is not all that different from the JDM R.
scott
scott
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