GUYS U DID AN INTAKE ONE NOW DO ONE WITH THE EXHAUSTS AND POSSIBLY HEADERS ON A STOCK XA or XB?

Companies involved should be.....

DC Sports
Tanabe
TRD
C-ONE
BORLA
5Zigen
BLITZ
INJEN
SPY
JIC
EL Prototypes
SPFR
Stylis manifold back system
Any custom ones tooo.

Im sure everyone else would want this done too thanx.... 8)

I agree, they did intakes, why not do exhaust too. :P :P

i think JIC should be added since a few people have it.

and i believe EL prototypes makes a header and exhaust
system as well.

care to add a stylis manifold back system to the list? I've done the dyno.

how about the SPFR cat-back system too??

i voulenteer my car if you want to use it, since you could put all the axle back cans on and then stylis's manafold back system and then cut my stock exhaust and put on the SPFR cat-back system (since i'm getting it anyways).

Come u gotta do it now there is an outcry of people wanting it cummon pleeze do it....

As much as I love to do it, I'll probably get the same sh!@t I got it from the intake shootout so let's just leave it up to professionals so they can argue over the results.

Also it would be kinda unfair competition because some are axle-back bolt ons while others are cat-back (with cutting involved).

Now headers would be a different story.....

Then do the headers so we have an idea with them.....

So far there I only heard of two headers that are readily available for the xB....that's not worth it right now.

GUYS U DID AN INTAKE ONE NOW DO ONE WITH THE EXHAUSTS AND POSSIBLY HEADERS ON A STOCK XA or XB?

Companies involved should be.....

DC Sports
Tanabe
TRD
C-ONE
BORLA
5Zigen
BLITZ
INJEN
SPY
JIC
EL Prototypes
SPFR Any custom ones tooo.

Im sure everyone else would want this done too thanx.... 8)
I'll help you ONEQWICK....Send me one of each and I'll pay for the rest :wink:

FUNNY :lol:

Yeah , man. me too. I can help you out on the dno also, just send ME the parts. :lol: Now how about adding that stylis manifold back system to the list. 8)

also the RSR
http://www.optauto.com/webstore/product_information.asp?number=RSR-10-T500S&variation=&aitem=6&mitem=8&back=yes&dept=3853

exhausts will take some time to install, so they might not get through all of them in one day.

need an extra exhaust guru to help you guys out? :D Let me know when and where and I might swing by. 8)

how about an exaust cut-out, it is illegal, but i plan on doing it. if it works i garrantee more hp than any other exaust system, it will be cut out right past the headers, before the CAT. NO RESTRICTION AT ALL, FREE flow straight pipe. when i get it i will dyno it and post the results.

Eric M might still have the exhaust system I built for him. I think he is still selling it and it is already wide open. :D

how about an exaust cut-out, it is illegal, but i plan on doing it. if it works i garrantee more hp than any other exaust system, it will be cut out right past the headers, before the CAT. NO RESTRICTION AT ALL, FREE flow straight pipe. when i get it i will dyno it and post the results.

For NA Cars not making Gobs of power, Im a firm believer in back pressure. For cars with forced induction you are going to want no restrictions at all. With our motors being as small as they are (and making as much power as they do), I believe an open exhaust like that would do more harm than good, but please post results. :D

A dyno test of this magnatude would be hugely expensive, I'm not holding my breath until this happens.

I have to disagree with back pressure being necessary. Science has shown it is not, what is critical is the primary length and diameter but even more so the collector diameter and length to the atmosphere. It is directly related to RPM targeted, HP level of the engine and cam specs. From what I have seen, the engines that responded well to a slight increase in back pressure did not have an exhaust header/sysem designed specifically for that engine configuraiton.

The exhaust cut out could help or hurt depending on how it is set up and fabricated.

I have done a lot of reasearch on header/exhaust design and have some experience with small displacement (2.0L engines) BMWs and aircooled VW/Porsche's that operate in the same RPM range as these little 1500s. I think a complete state of the art low restriction exhaust from the ports to the bumper would show significant gains in HP as long as the intake/fuel sys and ECU could keep up. I would love to fabricate a state of the art header/exhaust for my Xa and see what happens.... I might be able to get it past the smog Nazi's- "Of course the Scions come with a tubular exhaust header, just call the dealer and ask them".... Might work.

As a side note, you would be amazed at how few headers are actually developed on a dyno using scientific testing standards. Most are just welded/bent up to fit easily and have NEVER been correcty developed. Sure, some mfg will run it on a dyno afterwards so they can claim a specific HP gain but that header is leaving a lot of HP untaped. Real header development is expensive and takes time and a really good header will not bolt up to any stock exhaust and if it did it would not work very well.

HP and handling is KING.... Screw the BLING...
ken

how about an exaust cut-out, it is illegal, but i plan on doing it. if it works i garrantee more hp than any other exaust system, it will be cut out right past the headers, before the CAT. NO RESTRICTION AT ALL, FREE flow straight pipe. when i get it i will dyno it and post the results.

For NA Cars not making Gobs of power, Im a firm believer in back pressure. For cars with forced induction you are going to want no restrictions at all. With our motors being as small as they are (and making as much power as they do), I believe an open exhaust like that would do more harm than good, but please post results. :D

dyno and track testing disagrees with you.

how about an exaust cut-out, it is illegal, but i plan on doing it. if it works i garrantee more hp than any other exaust system, it will be cut out right past the headers, before the CAT. NO RESTRICTION AT ALL, FREE flow straight pipe. when i get it i will dyno it and post the results.

For NA Cars not making Gobs of power, Im a firm believer in back pressure. For cars with forced induction you are going to want no restrictions at all. With our motors being as small as they are (and making as much power as they do), I believe an open exhaust like that would do more harm than good, but please post results. :D

dyno and track testing disagrees with you.

they may disagree, but niether mean a damn thing in daily driving, do they?
I agree with RedBox.

Yup, doing a cutout would lose any torque these engines make. You might gain HP but you will lose torque. You will be faster up top but for daily driving it will hurt more since you are down low all the time were torque is needed not hp.

exactly, I put on an exhaust for a few days. I took it off and sold it for that exact reason.

they may disagree, but niether mean a damn thing in daily driving, do they?
I agree with RedBox.


um, yes they do.

when I want to go fast I floor it and let the rpms rise. When I don't want to go fast im nowhere near 100% throttle so I dont care if I have lose 5% power at low rpms.

moreover, you can look at the dyno graph and see if the power or torque drop off at lower rpms with a more open exauhst.

I challenege you here and now to provide me an example of a modern fuel injected engine that loses significant power anywhere on the dyno chart with an open exauhst.

this whole issue is especially moot on engines with variable cam timing.

my point is that when you pull away from a stop or go around a corner in normal driving, you DO want that 5% of power that even you admit will be lost by putting on an open exhaust. The dyno is just a way to see hp and torque numbers, that don't usually have much to do with NORMAL real world driving. Peak hp is of little to no use in the real world on the street as a daily driver. Racing yes, daily driving, no........it's all about torque in daily driving.

Most people on this website are just normal, everyday people who drive their cars normally, not flooring their cars all the time....we can't drive like that here in California.

my point is that when you pull away from a stop or go around a corner in normal driving, you DO want that 5% of power that even you admit will be lost by putting on an open exhaust. The dyno is just a way to see hp and torque numbers, that don't usually have much to do with NORMAL real world driving. Peak hp is of little to no use in the real world on the street as a daily driver. Racing yes, daily driving, no........it's all about torque in daily driving.

Most people on this website are just normal, everyday people who drive their cars normally, not flooring their cars all the time....we can't drive like that here in California.

No, I admit nothing of the sort! I was merely making the point that even if hypothetically you did lose 5% power at low rpms, since like you just said, you aren't flooring the car anywhere, you can just apply 5% more throttle and tool around as usual. nothing lost.

Dynos show the entire power curve, not just peak numbers.

somebody show me a graph of the 1.5L toyota engine with open exauhst
and lets compare it to a stock one. I could be wrong, id be happy to learn.

somebody show me a graph of the 1.5L toyota engine with open exauhst
and lets compare it to a stock one. I could be wrong, id be happy to learn.

I agree, I'd like to see and compare too........I too, could be wrong and would be happy to learn too. :wink:
(edit: and some seat of the pants driving too!) :wink:

ok , there is a gain on open exhaust ,BUT you lose low end power. Look at those funny cars that have massive power and no exhaust. But they are good for 1/4 mile runs ONLY. Not for the race track, and Import tuner did a dyno of exhaust systems for a 2001 ecilpsce. On those dynos they usedmany exhaust systems and then for fun installed a motorcycle muffler to the down pipe on one run. Freakin peaked like crazy with HP, but they also mentioned after a certain point it lost low end power right away. The same goes with our system, espcially since our trannys are geared so low.

Stylis's 2 cents

P.S.
Could you add the new precisionmuffler.com axel back to the shoot out?
(Another shameless plug for www.precisionmuffler.com ) :D

which of those systems are cat backs and which are axle backs... i just got the magnaflow cat-back and will be putting it on the dyno here hopefully friday so i just wanted to know so that we could compare some numbers.

f1 cars and nascar and every other racecar I can think of also has open exauhst.

how about we refrain from repeatinig the same thing and someone actually post some dyno charts from our cars?




ok , there is a gain on open exhaust ,BUT you lose low end power. Look at those funny cars that have massive power and no exhaust. But they are good for 1/4 mile runs ONLY. Not for the race track, and Import tuner did a dyno of exhaust systems for a 2001 ecilpsce. On those dynos they usedmany exhaust systems and then for fun installed a motorcycle muffler to the down pipe on one run. Freakin peaked like crazy with HP, but they also mentioned after a certain point it lost low end power right away. The same goes with our system, espcially since our trannys are geared so low.

Stylis's 2 cents

P.S.
Could you add the new precisionmuffler.com axel back to the shoot out?
(Another shameless plug for www.precisionmuffler.com ) :D

I got one of the stylis manifold back here.
http://www.scionlife.com/regimg/10134/extrapics%20165.jpg

Also aLL STaR gene what are the components of the magna flow cat back?

nice, are those dyno runs with no other mods besides the exauhst?
where can you buy that?

Also aLL STaR gene what are the components of the magna flow cat back?

the system includes full 2.25 inch piping, a resonator, and a muffler. i will try and get pics of the system, as well as try and get it on the dyno by tomorrow and have that stuff posted here for you guys.

that dyno is for the manifold back system I have and it is available for sale. Not the one I have on my car, you would get a new system. Also I have an axel back for sale at www.precisionmuffler.com PM me for more details.

fess up Stylis... it ain't just the exhaust man!! he also has a mocked up version of the Injen Intake on his xB, but beyond that just riding on heavy ___ 18"? rims too...

not the best intake in the world I would have been better off with a real INjen. Oh, well. Maybe next run! :D

hey guys just got the xB off the dyno and with the magnaflow cat back we got a +5 hp and a +7 ft lbs of torque. i also have a sound clip that i will try and post here monday as well as some pics of the system...