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DeepMag1c
02-01-2005, 08:30 PM
What are some pros and cons on Headers...

denim
02-01-2005, 10:07 PM
pros: added hp in the right install, lower back pressure

cons: if not for the right install can be harmful to low end power

dbhittin
02-01-2005, 10:18 PM
also makes your exhaust louder and sound better... lighter than most stock cast iron manifolds

1972chevelle
02-01-2005, 10:38 PM
use the correct model for your car and you will be fine.... better sound, deeper sound, more hp, less weight, lots of pro's very little con's unless set up wrong like denim said...

Primo
02-02-2005, 12:03 AM
also makes your exhaust louder and sound better... lighter than most stock cast iron manifolds

just adding headers wont make it sound louder with the stock exhaust on.

pros: increased hp & torque with a performance exhaust, improved gas mileage

cons: none that i can think of

wErd
02-02-2005, 12:35 AM
use the correct model for your car and you will be fine.... better sound, deeper sound, more hp, less weight, lots of pro's very little con's unless set up wrong like denim said...


not nessesarily, if i wanted to buy a header for my car i'd have to buy one for a pinto or a ranger.

soundstreamer
02-02-2005, 12:56 AM
pros-
more hp @ higher rpms
better fuel economy

cons-
less torque @ lower rpms
higher temps in engine compartment

i've had three sets of headman headers on three different vehicles(all of which were made for that specific vehicle) and none of them fit in perfectly. every set needed a little dent somewhere in them(which voids the warranty) to make them fit without rubbing bell housing, cross member, ect. i go with them because they are among the cheapest and are very well made. the only other cheap headers i ever tried to use were flowtech...but when i pulled them out of the box they had very small diameter tubing...so i sent them back.

the best bang for the buck engine upgrades are intake and exhaust(even though compete exhaust systems are pricey). free flowing cold air intake with a k&n filter and a set of headers with free flowing mufflers help engines breath so much easier...

deadboi77
02-02-2005, 01:47 AM
x2...i have a 96 cherokee 4.0 and damm the headers for that(only need one..inline 6)was around 500..so i just replaced my manifold*was starting to crack around the pipe*got a hi flow cat and a borla muffler/exhaust..then added kold air with a big bore throddlebody and 3/4in.throddle body spacer and i tell you she moves for just bein a 4.0

BDIDDY
02-02-2005, 09:55 AM
My dad used to build engines when he was younger and he always told me that headers leak. I don't know if that's because they didnt have the technology that we have, or what..


Anyone know?

yz_gt69
02-02-2005, 12:36 PM
The only place I have seen headers leak is coming off the block when there is an improper seal. This can sometimes even happen when the header is attached to the rest of the exhaust. It just simply gets tweaked as pressure is applied. However, that is usually unlikely.
A lot of headers have slightly warped flanges. Or I have seen once that the welds on the header were crappy. There's all sorts of fun with headers! lol

j3bus2k3
02-02-2005, 02:28 PM
Number of things contribute to leaks, rarely is it bad build/cracks but mostly bad seals, not torqued down enough or sitting straight. I usually put a silicon bead on header or exhaust gaskets for added protection. as for not fitting perfectly, its just the deviation of the machine making them. No 2 parts are the same, there off by thousandths. But as for pros-horsepower, torque, exhaust note (depending) Cons-if its too large, a farty exhaust due to no back pressure.

-Mullet.

^just a nickname

Bigrick31
02-02-2005, 04:06 PM
may make your vehicle non smogable (is that a word?)

1972chevelle
02-02-2005, 05:53 PM
for an 88 chevy suburban you should not have a problem finding a good set....... headers usually only have cons if they are built incorrectly from the factory or set up wrong.... and if your headers leak this means they where not sealed correctly. You gotta rember that the temp. is so high it puts a lot of stress on those seals so they have to be done right.

soundstreamer
02-03-2005, 01:03 AM
every set of headers i've ever installed needed the bolts re-torqued one or two times after initial install. i also found using regular exhaust flange gaskets sealed against the head better than header gaskets...which i've blown out a time or two

yz_gt69
02-03-2005, 02:43 AM
good point, didn't think of reminding ya of that...

ighettoboyi
02-06-2005, 01:51 PM
all of you who say performance mods help milage are dumb. obviously you guys aren't readjusting your a/f ratios like you should. intakes and catbacks cause minimal changes in parameters and can be adjusted, but headers require some computer work (assuming your car is relatively new and is ecu operated not mechanical). anyways, once you readjust you shouldn't be getting better milage. also headers makes it more difficult to pass smog. and the performance (and loudness) is usually greater w/headers as opposed to just catback/exhaust

soundstreamer
02-07-2005, 09:47 PM
all of you who say performance mods help milage are dumb. obviously you guys aren't readjusting your a/f ratios like you should. intakes and catbacks cause minimal changes in parameters and can be adjusted, but headers require some computer work (assuming your car is relatively new and is ecu operated not mechanical). anyways, once you readjust you shouldn't be getting better milage. also headers makes it more difficult to pass smog. and the performance (and loudness) is usually greater w/headers as opposed to just catback/exhaust
it does make the motor more efficient, which means it takes less fuel to make it respond in the same manor. it is like a sub(it is ca.com) going from a sealed enclosure to an free air setting. less wattage(fuel) is required to make the sub bottom out(ok, that may have been way out in left field...i'll just quit now).
it has never increased my fuel mileage only because i get a little more interested in keeping the accelerator pedal down after a few upgrades. i have also never installed headers onto a vehicle with a computer(it has been completely removed from my current truck) and never had to pass an emissions test.

BDIDDY
02-07-2005, 10:56 PM
it does make the motor more efficient, which means it takes less fuel to make it respond in the same manor. it is like a sub(it is ca.com) going from a sealed enclosure to an free air setting. less wattage(fuel) is required to make the sub bottom out(ok, that may have been way out in left field...i'll just quit now).
it has never increased my fuel mileage only because i get a little more interested in keeping the accelerator pedal down after a few upgrades. i have also never installed headers onto a vehicle with a computer(it has been completely removed from my current truck) and never had to pass an emissions test.



I could agree.....

But... If you look at it like that then at supercharger and everyother aftermarket part would get you better gas mileage....

If you look in the trucking magazine, the sell packages that show how much better your gas mileage can get with a intake, exhaust, headers, etc...



Maybe I'm just lost..

ighettoboyi
02-07-2005, 11:07 PM
like i said, things that change the flow quite a bit will require extra FUEL to maintain correct burn ratios. mods may be less RESTRICTIVE but there's a lot more to fuel efficiency than that

1972chevelle
02-08-2005, 05:21 PM
I agree........ from what i have seen you either get one of two things........... better performance which basically is a casue of more air and fuel to the engine... which casues more fuel to burn quicker and your not going to get better gas mileage by burning the hell out of all ur fuel..... or theres products that are made to give u better gas mileage which do not burn as much fuel but keep there normal performance and are not supposed to give you more performance ...... a lot of those mags have a whole lot of bs ad's in them that just wanna catch your eye

1972chevelle
02-08-2005, 05:22 PM
also just like car audio everything comes down to the set up and the car

ighettoboyi
02-12-2005, 12:37 PM
the only reason you gain milage with some basic bolt ons is cuz of the often times overlooked fact that you are LOSING low-end power for high-end power, so in regular driving conditions you're getting better milage cuz your car is actually not performing as well as stock. of course these losses are negligible to the butt dyno

Polecat
02-28-2005, 03:04 PM
headers help, only if the rest of the motor has changed made it it...because headers do indeed help flow, and will change settings. Hence why companies ask that make chips on all your mods...on a carb's vehicle, you will need to change A/F ratio, and possibly jets.
Now headers have come a long way, but get some good headers with a solid flange, good copper or type gaskets, and some Stge 8 locking bolts and your fine...
headers on a race car is fine, daily, I personally won't do again...

cheeseburger35
03-03-2005, 08:33 AM
i'm with polecat with this one.. i've had 2 sets of headers on 2 trucks.. both chevy's both hooker headers.. on my 79 i must have gone through 4 or 5 gaskets before i changed to copper.. and i haven't had a problem yet do not cheap out.. they're like 50 bucks a set but they're worth it. ... if you're going to get headers atleast use lock washers or some loc-tite make sure you use the right kind.. (the kind that'll hold.. but you can still break lose with a wrench) .. wrench that brings up another point.. putting headers on and off can be a really big *****.. especially on my 79 on the back end bolts.. just no room to turn a wrench.. find you a really small 7/16 wrench and it'll help loads.. another thing.. tighten the bolts in the middle and then do the outsides...