How does the exhaust system affect car performance?

**fenris** · June 23rd, 2003 11:59 AM

How does the exhaust system of a car affect the overall performance?

Does installing a header and aftermarket muffler have any effects on the speed and performance of the car?

**spazzkid** · June 23rd, 2003 01:56 PM

from a 5zigen site:
"5Zigen exhaust systems are also well-known for producing a deep and distinctive note, enhancing drivers' racing spirit."

hehehe.

**fenris** · June 23rd, 2003 02:23 PM

in other words? wala tlgang benefit sa performance ng kotse ang pag-upgrade ng exhaust system?

**artpogi** · June 23rd, 2003 02:31 PM

AFAIK, you might get a very minimal (re: not noticeable) gain if you upgrade your exhaust system to a more free flowing one.

Maybe if you will get a mandrel bent exhaust system instead of the usual crush bent and a correct size piping and free-flow muffler then you will get some "gains".

Experts what you think?

**ghosthunter** · June 23rd, 2003 02:35 PM

actually meron but different cars would have different results from the same type of exhaust mods done.

stuff that affects performance gains in the exhaust system:
-number of joints for the header (less is better, less turbulence)
-type of headers depends on car engine & purpose for mods (daily driver or drag/race car?)
-quality of the welds (must be as smooth internally as possible)
-number of turns and curves (less is better)
-size of pipings (too large or too small)
-minimize choke points like catalytic converter, silencers, flex joints to the required minimum. If not, use hi-flow version of such like hi-flow catalytic converters, etc
-change of size of piping (exhaust gas velocity must be maintained)
-big mufflers doesn't mean its better.
-use FULL stainless mufflers. These last for years. An "aluminized" muffler will only last less than two years at most, usually about a year only before rusting out.

**fenris** · June 23rd, 2003 03:13 PM

what would give more noticeable performance gain?

a set of Splitfire sparkplugs or headers?

**artpogi** · June 23rd, 2003 03:42 PM

Originally Posted by fenris

what would give more noticeable performance gain?

a set of Splitfire sparkplugs or headers?

the headers. But very,very minimal lang.

If you are really interested in gaining power, either you go turbo or palitan mo makina ng kotse mo ng mga high-horsepower engines na pwede isalpak dyan sa kotse mo.

**vinj** · June 23rd, 2003 03:43 PM

Good headers (even local, crush-bent ones) will give you some increase in power/response, it'll work OK if coupled with a good intake as well.

The power increase from a full aftermarket I/H/E set-up will depend on how restrictive the stock system of the car is... To give an example, a '93 Sentra GA16DE (stock crank HP: 110) engine may put out less then 90hp at the wheels when dyno tested but with the basic I/H/E bolt-on mods, it can reach around 100hp at the wheels. Also, cars with forced induction (i.e. turbo) can also be more responsive to such mods.

I'll take the headers any day over Splitfire plugs... IMO, stick to you stuck plugs and just gap them properly.

HTH.

**ironarch** · June 23rd, 2003 03:56 PM

You would probably feel the dif at higher revs. But you will hear it earlier.

**DSM619** · June 23rd, 2003 04:07 PM

EXHAUST PERFORMANCE ??? Oo naman , if proper exhaust of the car is installed , a big amount of power can be attain . pero ibat ibang gains depends on the condition of the car at ang right piping combo . The exhaust and collector plays a big part sa performance ng auto , without the other ay minimal ang mga gains at mandrel bent pipes plays a big part too .

A Honda Civic with B16A can easily make 18 horses with a 2.5 inch piping and a 4 to 1 collector / header . :D