I'm interested in the DC headers but have had some mixed reviews about adding headers to the xb in general.
Is there a thread already discussing this I missed?
If not could I get some opinions, especially from any owners of an installed DC exhaust.

 

well i can tell you that just bolting on a header to any car will not give you results to gawk over.... ecspecially on a 1.5l engine....
save your money up to buy a super or turbo charger kit.... if you can save 350 in 1 mon. just wait ten times longer for 3500 you wont regret turboing a engine that has been driven a little(break-in period)

 

https://www.scionlife.com/forums/viewtopic.php?t=3251
Product review and opinions.

 

Thanks. Just what I was lookin for.

 

no problem, we got your back. :D

 

im running the headers...very much worth the money.....im gonna end up supercharging this thing so headers were a must

 

If you s/c then you will really want the headers, otherwise you are restricting the flow from the s/c

 

I am going to get that thing too, I have a manifold back system and I know that will open up the power even more! Rodney_Ray has the hedder and my manifold back system too and it feels great! :D

 

sorry, i don't mean to jump in on your post here, but i want to ask something. i know nothing about cars and i was wondering if headers improves low or high end power? and does anyone have dyno gains for any of the headers for the xb?

 

It will give more up high. Anything that frees up backpressure will result in more up top than down low. Typically the only way to increase low end power is with more torque down low. To do that usually would require forced induction. A cam can also do it if cut properly.

 

Myths!!! Headers do increase torque and HP accross the board-as long as they are designed correctly with the correct size primary tubes and collectors. The available headers for Scions are the pits but it's all you can get until Weapon R gets their new design on the market. It's better but not optimal.

Use the search for a lot of discussion on headers.

ken

 

Ken,
thanks for the tips. do you have any more info on the weapon R headers? website? stats? release date estimate?

And I'm sorry but I have to comment on your sig: 'Real hot rodders don't pay someone to modify their car for them. If you don't know how to do something... LEARN!!'
...its all about how you use your time. getting my phd in genetics doesn't give me much time to learn about car mechanics...but that don't mean i'm not gonna have my own hotrod!
..i'll leave the car customization to talented guys like yourself...and just leave me to geneticly engineering your food and children! (but we both can still have some sick ___ rides)

 

LOL. And these headers from Weapon R have been dyno tested side by side with the others? Must of been to make such a bold statement. The hp gains we are seeing from the current available headers are right in line for any model of car. We are seeing about a 5% gain with them. That is the same I've seen when adding them to 240hp cars, 330 hp cars and 405 hp cars.

 

Stylis..I saw you warn an auto tranny driver that one of your exhaust could be louder than on a manny, do you have a sound clip of this. Also, with the combination of headers and exhaust (on a autoBox to be specific) would that be deafening :sad: and what about CARB/smog (with just your exhaust and with header/exhaust?) is that ever an issue?

Al.Truistic
aB

 

The automatic scions are just loud on the freeway (can't hear the stereo loud! ) with the Precisionmuffler.com Axle back. But not to worry I am in the works now, to have another axle back for automatic scions and still have it so you won't scrap it when you lower your car.

As for smog, having an axle back or exhaust system is not an issue for smog. As long as the right pieces are there for the smog. Catalytic converter, resinator, muffler, tailpipe. And the hedder is another story, there is supposed to be a CARB number on the hedder, but if you can just put the original heat sheild back on , hopfully the smog guy won't look back there to see if its a hedder.

 

I don't believe the Weapon R header has been tested yet. Knowing more than just a little bit about header design I would bet it will beat the DC or the ELprototype headers easily and I don't gamble!

The primaries are longer (but still too short) and it uses a better (but not the best) collector design. The other 2 are made to bolt on easily in the stock location, which they do quite well. The Weapon R header is much more involved to fit in due to the longer tubes (which bring the RPM band down to where it can be used). DC and EL have '70s collectors and VERY short primary tubes (necessary to fit in the confined space). They are so short it would take a 9500prm engine to use that length effectively. The Weapon R header is not the BEST design, just better than the other 2.

The best solution would be a complete custom header/exhaust from head to bumper with a header designed for the RPM band, camshaft, port size, valve size, and any other mods done to the engine. NO MFG has taken any of this into account yet. I spoke with DC himself, they just whipped up a header that fit. He didn't even measure the port dia.!!

I have a design in mind but my wife still won't let me take the xA apart..... someday....

ken

 

On a few echo installs, guys found that just the headers resulted in a slight loss of torque, with an increase of hp in the upper revs.

This is all subjective though, the cars weren't dyno'd.

Someone mentioned cams.. I wonder if we'll see any performance cams come out. Might be tough to do consider the vvt-i.

At any rate, from what I've read and heard, upgrading the entire intake/exhaust system is the best possible way to go. Might take a bit longer to save up the cash for it all though.

 

From what i saw of the weapon r header i looks very much like the header they got in trouble with Hy-Tech over.they copied a header for a honda product . It was on Honda-T
Hy-Tech is a Cart and Formula one builder as well as exotic euro cars that start
with the letter F, he also does headers for honda's and acura's. And as far as how a header willhelp Ken is quite correct.The weapon r header is equal length this should help out over the whole power band but only a dyno will tell. Anybody with a mig or tig can make a header but how you make it is all that counts

 

Are you saying that weapon R is gonna have a better hedder?? :? How is that possible? There is limited space as is and I know that everyone wants something that can bolt on with no problems, so I can't understanf how to design the hedder any different. :?

 

Search for the post with pics of the Weapon R prototype. It bends up before it goes down to the collector making the primaries longer, that's why it's more trouble to install but it will be the best production header available.

I may have to buy a second xA just so I can take it apart and modify it......

ken