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View Full Version : Headers? What kind?


Sniperfox
10-30-2004, 12:10 AM
I have read alot about cat-backs and CAI's, but how about headers? Is anybody changing headers and what kind is giving the best performance?


http://img101.exs.cx/img101/6476/sniperfoxsig13.jpg

NewFoundPower
10-30-2004, 01:17 AM
I have heard alot of good things about Kooks and JBA.

www.kookscustomheaders.com (http://www.kookscustomheaders.com)
www.jbaheaders.com (http://www.jbaheaders.com)

-D-

Sniperfox
10-30-2004, 11:10 AM
I have JBA on my black LX and they are great, but I haven't heard much talk about installing headers on terminators.


http://img51.exs.cx/img51/8870/sniperfox2.jpg

jack
10-30-2004, 01:07 PM
From the December 04 Muscle Mustangs & Fast Fords they added a throttle body and long-tube headers with a gain of 20 hp. So most people just spend there money where they can see bigger gains.

TMG
10-30-2004, 01:59 PM
Ditto for Kooks Long Tubes I they're Grrrreeeaat!!

kilroy
10-30-2004, 03:29 PM
From the December 04 Muscle Mustangs & Fast Fords they added a throttle body and long-tube headers with a gain of 20 hp. So most people just spend there money where they can see bigger gains.Probably got the gains from the TB/Plenum - least most of it (have yet to read the article). Apparently the power comes from the ported plenum in the ported plenum/TB combo. Otherwise, swapping on the TB gains are non-existant save for immediate throttle response. Check this link out & do searches on both modularfords & svtperformance:
http://www.modularfords.com/forums/showthread.php?t=17884

I want Kooks in a bad way. I'd written an e-mail to Jim D'Amore of www.teamjdm.com (http://www.teamjdm.com/) and will share it as I think it hits the nail on the head.


JC,



Everything you said was right. However think of the longtubes as for what you want to do in the future with this car. Are high boost numbers or a bigger superchager in plans? If so then you want them. Gains will be minimal from all aspects except sound, unless you run high boost and or a bigger supercharger. When you put the long tubes on you get a square motor as far as air in to air out and that brings up the torque numbers not as much as HP.





JimIII

----- Original Message -----

From: "JC" root@ibm.com

To: <tech@teamjdm.com>

Sent: Sunday, October 10, 2004 5:53 PM

Subject: Long Tubes





http://www.svtperformance.com/forums/showthread.php?s= (http://www.svtperformance.com/forums/showthread.php?s=)

<http://www.svtperformance.com/forums/showthread.php?s=&threadid=128756 (http://www.svtperformance.com/forums/showthread.php?s=&threadid=128756)

&threadid=128756



Anthony/Jim,

I just read your thread about the advantages of going LT (say versus mid-length). I have a Amazon tweaked '03 with metallic-strat Bassani X-pipe into Stinger cat-back & 2.85 RR pulley with 9"Accell Kool Blue CAI (AR). No new dyno numbers since the x-pipe (465/486 SAE with stock h-pipe) - but I noticed two things after installing the high-flow catted X. 1) slight loss of torque down low & 2) pulls stronger up top. Now, my neighbor went the BBK LT/catless h-pipe route, 2.80 pulley, and 180 thermostat & on his dyno it ONLY made 5rwhp (no mention of torque) after putting the headers on & he was pretty upset about it all 'cause it feels so weak down low - less torque. I drove it & it feels weaker than mine, for sure (his, "Strictly" tuned). It could be the tune - but he bought all his stuff through Strictly as I went AR. Being an old hot rodder, I think of motors as nothing more than air pumps. You make the inlet/outlet as efficient as possible (maximize flow) & you have a winner where boost is actually a restriction, no? I would expect to see the boost drop yet power/torque increase with a more efficient setup. LT on normally aspirated motors ALWAYS responds well, and I am baffled by my neighbor's results & why Terminators require backpressure to perform. At the strip, I was ~2mph faster & ~.15-.2 tenths quicker.



I love the sound of Long Tubes & if you can persuade me technically to do so, I would love to get retuned with Kooks Long Tubes in place. I would love to keep the Bassani metallic-strat cats (literally, the converters only) & put them on a stainless h-pipe. With 12" or so of straight pipe that shouldn't be an issue...



Please convince me. My car is a daily driver. Are long tube headers in my future?



Sincerely,



James Cook (aka kilroy)
In the above letter I was kind in saying ~2mph faster. I missed third then got after it again & still my mph bested his by 2.
Sniperfox, If you're planning to go big you'll need them eventually but there are plenty of cars north of 500rwhp/tq without them. I'd ask your tuner for their insight concerning your intentions.

*Edit: changed e-mail addy

SVTMADMAN
11-04-2004, 08:53 PM
Like my Kooks LTs but if your lowered prepare to dodge the humps and bumps, Im about 18 to 20 over cars that have the same set up as I do.468 rwhp 515tq

KB 2.4 coming soon to a race near you!:thumbsup:

Travis
11-06-2004, 12:01 AM
stock headers are fine.. no reason to change them..

ausie
11-11-2004, 06:57 AM
I agree with Travis, the stock headers are good the way they are. Believe it or not, they have made some advances in header designs even though they are cast iron. Unless you are planning on installing a turbo, reducing the effective back pressure will reduce the amount of air you can compress into each cylinder. Perhaps a larger displacement supercharger or more boost would be needed to maintain the same amount of forced air if long tube headers are used since some of the incoming air/fuel would be leaving the chamber with the exhaust gasses. Part of the intake lobes of the camshaft will open up the intake valves as the exhaust valves are closing. The increased scavaging created by long tube headers improves airflow exiting the cylinder by creating a vaccum within the exhaust which will draw out more of the incoming air/fuel mixture. With forced induction, you end up loosing most of the boost pressure from the scavaging of the headers. Perhaps there is a good set of cams that would compensate for that.

InfamousSVT
11-11-2004, 07:30 PM
I'm going with JBA shorty headers (direct replacement) I've heard that the long tube headers have to many draw backs and that unless running somewhere in the 600+hp range you won't get the full benefit of having them.
I just plan on replacing mine with the JBA's, porting the supercharger, 14psi, Throttle body, and JLT CAI! Should make for a good combo.

Just my .02!!:D

VenomInside
11-18-2004, 06:21 PM
Im going Bassani Midlength headers..

Butcher
11-18-2004, 08:32 PM
I agree with Travis, the stock headers are good the way they are. Believe it or not, they have made some advances in header designs even though they are cast iron. I agree totally. I/m at 589.9 RWHP tuned on a Mustang Dyno with mine. Thats well undertuned too though. Granted, I did shuck the eaton and replace it with an F1-A Procharger, but they flow well.

Jimmie