I mean, ITBs are not cheap and on an already expensive swap, I find it odd that sooo many are still squeezing more dough to get ITBs and it doesnt even add that MUCH power. so why do so many K swapped cars use ITBs? Why not stick with the regular intake manifold+intake arm?

 

You say they don't add that MUCH power, but ITB's have been proven to make good power on K series.

 

Yeah, they make ok power, but they are not worth the effort especially on 99% of the set-ups show here, k20.org, etc.

If it were my money, I would get a K24 bottom end, a good cam, RBC manifold, wiseco pistons, etc..... before I would even consider ITBs. Honestly, I'm not that much of a fan.

Plus, they really make a street car a cop/theft magnet.


Modified by mar778c at 10:30 AM 2/24/2008

 

for the bling and throttle response.

if you have the money to do a k swap and get itb's, wouldn't you?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazi_E &raquo;</TD></TR><TR><TD CLASS="quote">for the bling and throttle response.

if you have the money to do a k swap and get itb's, wouldn't you?</TD></TR></TABLE>

No? I prefer torque to throttle response.

 

I was just wondering because I heard something like the price of ITBs arent that far off from the price of an aftermarket intake manifold so you might as well spend a few more and get ITBs. Now im not sure but is it true that you need to change something regarding the intake to swap? Im not sure if its fuel rails or what but i heard something bout the price of the stock intake setup being not that far off from ITBS. Maybe it was if you sold the stock intake setup you could get almost enough money for ITBs?Can someone clarify this?Someone on ere told me this a long time ago.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HBKFanatic &raquo;</TD></TR><TR><TD CLASS="quote">I was just wondering because I heard something like the price of ITBs arent that far off from the price of an aftermarket intake manifold so you might as well spend a few more and get ITBs. Now im not sure but is it true that you need to change something regarding the intake to swap? Im not sure if its fuel rails or what but i heard something bout the price of the stock intake setup being not that far off from ITBS. Maybe it was if you sold the stock intake setup you could get almost enough money for ITBs?Can someone clarify this?Someone on ere told me this a long time ago.</TD></TR></TABLE>

RBC - $250 shipped
ITB's - $1800+ (for non-OBX)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Power Rev Racing &raquo;</TD></TR><TR><TD CLASS="quote">You say they don't add that MUCH power, but ITB's have been proven to make good power on K series.</TD></TR></TABLE>




maybe ITBs don't make more power than the IPS manifold or an Endyn custom manifold, but i won't go that far to say ITBs don't make alot more power, they do ...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toyomatt84 &raquo;</TD></TR><TR><TD CLASS="quote">

RBC - $250 shipped
ITB's - $1800+ (for non-OBX)</TD></TR></TABLE>

Wow. Thats a lot of money for what appears to be a relatively simple mechanism. I will say this though, they are really nice both in the sound that they make and the way they look under the hood, it gives it that true NA feeling. I wasnt aware that they made 40hp, thats seems a lot. I know they make good power with mods, I just wasnt aware they made that much on a stock K series. Air intake tunability FTW. Is the throttle response really that much greater?

 

how many fast k series cars do you see with manifolds


there is your answer


people follow the fastest

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by model-123 &raquo;</TD></TR><TR><TD CLASS="quote">how many fast k series cars do you see with manifolds


there is your answer


people follow the fastest</TD></TR></TABLE>

I have seen two with rbc im check evans tuning website there is one there

 

This link has some good info: http://www.onecamonly.com/showthread.php?t=687

 

I'd like to compare ITB's against the new manifold that BluePrint is coming out with soon.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shad0wslay3r &raquo;</TD></TR><TR><TD CLASS="quote">I'd like to compare ITB's against the new manifold that BluePrint is coming out with soon.</TD></TR></TABLE>

Looks sick

https://honda-tech.com/zero...age=1

 

The truth is that there are so few decent manifolds out there for k swaps. I mean you can run a ported rbc but that isn't the end all / be all solution for a 300+ all motor K.

Cheetah mentioned the IPS manifold- hard to find, endyne custom manifold is not an off the shelf item and most people wont spend the money for one. Jeremy @ inline pro is in development right now on his, AFI has a pretty sweet one that is making some decent power right now.

There arent that many decent manifolds out there right now for Ks , and ITBs are proven to make power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AMLS4dr200whp &raquo;</TD></TR><TR><TD CLASS="quote">

I have seen two with rbc im check evans tuning website there is one there </TD></TR></TABLE>

do these cars run low 10's or faster? Thats what people want to prove. An 11 sec all motor car isnt anything to brag about anymore

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by model-123 &raquo;</TD></TR><TR><TD CLASS="quote">

do these cars run low 10's or faster? Thats what people want to prove. An 11 sec all motor car isnt anything to brag about anymore</TD></TR></TABLE>


They are 10 sec street cars, but could go faster with a manifold that performs better than a RBC.

By the way a 11 sec all-motor car is something to brag about with all the weight penalties K-cars get. You try running a 10 @ 2450 lbs, with the new rules it will be alot easier than last year but still not that easy @ 2200 lbs.

Just my 2 cents

I decided to go the ITB route because of the Manifold restriction or shortage right now.

Marc P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by model-123 &raquo;</TD></TR><TR><TD CLASS="quote">

do these cars run low 10's or faster? Thats what people want to prove. An 11 sec all motor car isnt anything to brag about anymore</TD></TR></TABLE>

Yes , one of the cars on evan's site is a good friend of mine. he runs 10s.

Marc P hit the nail on the head- 11s isnt something to brag about? Ever have to add 300 pounds to a car just to make weight? its an entirely different ball game man. You need damn near 300hp out of a K @ 2400 to go high tens. Maybe building an 11 sec car is nothing to brag about now-a-days, but how about building a low 11 high ten car that CONFORMS to the class rules and weight. Not just some hacked up shell that is a far cry from the street car it USED to be. And thats nothing to brag about? Build one then

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by model-123 &raquo;</TD></TR><TR><TD CLASS="quote">An 11 sec all motor car isnt anything to brag about anymore</TD></TR></TABLE>
Yeah, there are so many guys running 11's all motor that it's not even funny. At full weight. You probably run 10's with yours, right?

BTW, there are plenty of folks running plenums on K motors and making great power. ITB's have not taken over the market just yet.

 

The price for a good IM and TB combo is going to cost close to a set of ITB's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Teggie &raquo;</TD></TR><TR><TD CLASS="quote">The price for a good IM and TB combo is going to cost close to a set of ITB's.

</TD></TR></TABLE>

Wrong. My intake manifold and throttle body setup cost me just shy of $400.


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

Wow. Thats a lot of money for what appears to be a relatively simple mechanism. I will say this though, they are really nice both in the sound that they make and the way they look under the hood, it gives it that true NA feeling. I wasnt aware that they made 40hp, thats seems a lot. I know they make good power with mods, I just wasnt aware they made that much on a stock K series. Air intake tunability FTW. Is the throttle response really that much greater?</TD></TR></TABLE>

Where are you getting this 40hp? I have yet to see an ITB setup produce more than 15whp over a solid IM/TB setup. And, once more, they lose torque in the mid-range, by comparison.

 

I think he may be talking about a custom carbon fiber or a extrude honed job.

ITBs like Jenvey's where you can customize the horns will produce more midrange torque and more whp than a IM/TB combo (see BearsEK latest b-series test).

 

It's most likely because more people using K series can afford itb's compared to those using B series engines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">I think he may be talking about a custom carbon fiber or a extrude honed job.

ITBs like Jenvey's where you can customize the horns will produce more midrange torque and more whp than a IM/TB combo (see BearsEK latest b-series test).

</TD></TR></TABLE>

1. This isn't a B-Series engine.
2. To produce torque, you need air flow velocity. To get air flow velocity, you need long, stepped runners. Jenvey ITB's are short runners, and have hardly any step to them. The quality is nice, and they're great for high-end horsepower. But, they don't produce more mid-range torque than a proper IM/TB setup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toyomatt84 &raquo;</TD></TR><TR><TD CLASS="quote">

1. This isn't a B-Series engine.
2. To produce torque, you need air flow velocity. To get air flow velocity, you need long, stepped runners. Jenvey ITB's are short runners, and have hardly any step to them. The quality is nice, and they're great for high-end horsepower. But, they don't produce more mid-range torque than a proper IM/TB setup.</TD></TR></TABLE>

1) b-series, k-series, etc... engine theory is the same. It doesn't matter. I brought up Jenveys because they have customizable set-ups. I pointed out Mike's test result as an example of a well conceived ITB/camshaft, header, engine combination that does out produce some very good IM/TB set-ups.

2) Velocity is one factor, you also need mass and direction. To quote a friend, "you need high inertia port loading."


Modified by mar778c at 1:31 PM 2/25/2008