prostreet440

i drive 1000 to 1500 miles a week in my 02 tl-s navi and i have heard that putting the headers and a cat back system doesn't really affect h.p that much. but what about gas mileage ? i really dont care if it brings me a few more horses but if it helps my mpg for as much as i drive it might be worth the cost . has anybody noticed a increase/ decrease in mpg since your exhaust was put on ?
it makes sense that making the engine breath better could help mpg as well as hp .
thanks

samkws

intake will help, but you drive too much and the header damage the engine a lot faster

exhaust is just for the sound on the TL, nth special.

ou sig

how do headers damage your engine??

moahdriven

intake will help mileage, ive noticed that. Unless ur V-TEC'ing all the time cuz it sounds so damn nice, then u lose more =[

ndawood

header damage???? you must explain that one.....

ndawood

The exahust might help your mpg but since the stock exhaust is quite free flowing, the gains would not be as great as those given by an intake or headers...

you might even want to consider the UR crank pulley as a few people did mention that their mpg was improved....

giovanni

Header damage the engine.....How so????? Exhaust is for sound....HMMMMMM.....i beg to differ...care to explain.

Hurleysurf24

headers and exhaust dont really add hp huh ? headers add the most hp of any mod other then a supercharger

ou sig

This guy is interesting...headers damage your engine...and they dont add much HP.

MQMH_03

i dont think you know what youre talking about samkws....30 whp i'd say is a pretty good gain...and headers are just part of teh exhaust system...why would it hurt your engine its just releasing the spent gases ?????

sc354

This guy has a little explaining to do. How does a performance part that doesn't restrict the airflow as much as the stock headers damage your engine??? Wouldn't it make more sense that the more air the engine sucks in, the better it performs overall???

His statement simply doesn't make sense...

joseph_99tl

he's 21.
he opened his mouth before he thought about what he was saying.

youngster.

VeeralS05

even me being just 17, I'm smarter than that...

benzo555

wow.. the knowledge on this board amazes me sometimes..

DerrickM

So, what are people spending for headers? I assume you have to replace the single pipe that goes back to the split for the two mufflers too?

I'd like to add some horsepower to my 2001 TL, but don't want to spend a ton of money...

ndawood

the price of headers really range anywhere from 300 - 1200usd depending on what brand you want to get. I decided to go with a new set of comptech headers and I spent about 1000CDN and am quite pleased with them.

moahdriven

go on ebay, look for some Accord V6 Headers. Should find a good amount of megan headers goin for around 200

thedream21479

Uh, no. The headers attach at the front of the catalytic converted. The rest of the exhaust (cat- BACK) can be kept the stock if you like. The headers will come with everything you need to install correctly.



And I agree, go look on ebay for Accord V6 headers. They may not have the COMPTECH name or such, but at paying about 900 bucks less, you probably won't care! I know I don't!

patrick

What doesn't make sense is how he got over 3,450 posts and 22 Rep Power.

izzo

izzo

even funnier

ndawood

:agree

I dont think we will ever be told why and how headers damage our engines.....

samkws

ahhh
seems like all you guys picking on me???

sorry i had work and i was studying for exam so i wrote that kinda brief...

i meant i saw some member's headers got a hole in a yr or 2, i believe that's OBX headers, and that picture looks bad with the header is burn from the heat~

one more exam tonite, then i am done

ndawood

that is damage directly to the headers and not to the engine itself.

r10apple

Funniest! Trust me, at 17, you'll say something stupid before the end of the day!!!

Anyway, back on topic, I suppose conceivably the lesser restriction would potentially affect gas mileage for the postiive, but mine has gone down since I mash the gas so much more. That being said, using SS all the time and trolling city and highway, I average about 20mpg. On a highway trip, it is usually 27mpg or so at approximately 85mph.

samkws

the smoke was coming out and he had to towed his car in the middle of the hwy

that would freak everybody out

can't imagine what happened if it happens on a cold day like today....-24 degrees?

giovanni

Care to explain then by what you meant...as per how it damaes the engine Sam.......Cuz i am thinking of getting headers

ndawood

not sure if that would be due to the headers... there must be ALOT more wrong with the car.... or it was a pretty serious exhaust leak if thats possible... either way ive never heard of headers cuasing damage before....

giovanni

I be freaking out if smoke was coming out especially on day like today....was it because of the headers or the exhaust.

samkws

john i am not really an expert in headers

but after i saw that thread i am kinda turned off

samkws

his OBX header got burned and had a big hole

you could see the header was burned by the heat of the engine, which means when it gets overheated the header may blow

that's just for OBX, not sure about the others

but i am dare to try if i have to pay over 1000 for comptechs, nor 300 for megan's quality

giovanni

which thread.....cuz you got me concerned sam.....i was going to be ordering Comptech headers....

samkws

https://acurazine.com/forums/showthr...&highlight=OBX

that shouldn't happen in any kinds of car at all, just not acceptable

the picture is horrible, the welded part is rusting and burned

patrick

what you say is true, it shouldn't happen. but you are talking about OBX headers, and the quality of these headers are known to be problematic (but having said that, some people have absolutely no problems with OBX). we can't say for sure that headers caused engine damage, because we don't have any evidence to prove that. if a mechanic comes out and says, yeah, i inspected the engine and the headers, and the engine was damaged because of the headers...and he gives a technical spiel on how and why it happened...then we have something to prove that headers did the damage. but just because it did happen doesn't mean that it will happen again. it could all have been a fluke or bad luck. but without any proof, the damage to the engines (if any) could have been caused by other mods that person has done. or perhaps he didn't recognize the warning signs that his headers were damaged. we just can't really say either way.

given the fact that many people have installed headers without any problems (myself included), we can fairly say that headers are safe to install and use.

samkws

how long have you put on your headers?

weather can be a big factor, esp the weather is different in Toronto. it's already -25 degrees in early december

patrick

Over 1 year, and zero problems.

akinaboy

I guess it is time to give answer to prostree440.
Some/many people put intake or exhaust for fun and they believe that they will give lots of horsepower. However, if you do not replace intake and exahst together, it would not help that much. Intake helps to bring more air into the throttle body and exhaust helps to blow more air out, which will make the air flow faster and that will give more hp and mileage.
Getting headers will give you more hp and mileage, but if you don't want to spend that much money at once, header is not a must to have item.
Getting cheap header may give you (-) on performance, but not all of them are like that.

Lawaia

There are pros and cons to running a free-flow exhaust system, which also includes headers, hi-flow cats and cat-back exhaust system. Free-up the exhaust will reduce your torque and bottom end, but will give you better top-end performance. Also, if the computer cannot adjust for the drastic reduction of back pressure you run the chance of running the fuel mixture too lean which can cause burnt valves. (That's the damage your engine part)
Now if computer modifications were available to custom tune for fuel mixture and ignition timing this mod would be much more beneficial. Marry these mods with a high lift and longer durtation camshaft to get more torque and you got yourself a great mod that will yield outstanding increases throughout the power band.

samkws

thanks for the explaination~

points to ya

prostreet440

Thanks Guys I Appreciate The Help And I Understand A Great Deal About Engines
( I Do Have A 9 Second 71 Challenger I Built Myself ) I Was Just Wondering Out In The Real World How Has Everybody Faired On The Mpg After These Things Were Done . I Am Going To Go The Full Monty And Do The Headers And Exhaust Ill Keep You All Posted On My Findings . Thanks
Tim