Performance gain from headers and intake?

[DURTYEF3]

Originally Posted by Robbie

and to think i traded a test pipe for a strut brace when i had my ITR

*shakes head*... I dunnooo...

[Robbie]

Originally Posted by DURTYEF3

*shakes head*... I dunnooo...

haha, well in my defence, fit over the factory headers, it fit joshs EG thou.... so i scabed rear strut brace out of sisters eg

[CL7R]

I'm interested to know if tuning a/f ratio after changing header and exhaust would make any difference at all?

[tysonzane]

Originally Posted by CL7R

I'm interested to know if tuning a/f ratio after changing header and exhaust would make any difference at all?

Yeah it definetly makes a difference. Some people see as much as 10kw depending on whats done. There are gains to be had with a/f or any tuning after any new mod done to an engine .

No tune no life...

[Robbie]

agreed, i found that my ITR ran extremely rich once i got more free flowing exhaust and headers... exhaust gasses get out faster so more feul gets in.... but i didnt get around to a good tune

[888]

So if you change and decat on ITR would it sound any bad or better than how it was with the cat on?

[Robbie]

i dont thinkit will affect the sound, the muffler/exhaust system is what factors the sound.... cat will make less restrictive but wont ulter sound MUCH

[tysonzane]

Originally Posted by 888

So if you change and decat on ITR would it sound any bad or better than how it was with the cat on?

Sound a little louder and from all the B series engines i've seen done, sounds better too. Nothing drastic, chances are only you will notice as the person who drives the car everyday etc.

[CL7R]

I decided to be environmental friendly and kept the cat...and yes I know it sounds stupid.

[tysonzane]

free horse powers waiting to be unlocked heh

[Coupe-R]

I should post things up like this in a post of its own but i will say this

On the dyno you can have the AFR at 13:1 and make say 130kw
then you make it 14:1 and make the EXACT SAME POWER EVERYWHERE

then try 12.5:1 and SAME POWER

Look at AFR as a way of keeping the motor happy, cool running and free from knock if it gets too hot (from lean like over 13.5:1)
also keeping plugs from fouling and using too much gas.

as for power gains though, hmmm nah not in my experience (to a degree of course)

main reason I think the whole power from tuning fuel has come about is from piggy backs that adjust fuel by tricking the map sensor. This in turn also makes the ecu run different ignition timing.

the secret......

power is ALWAYS in ignition timing provided your AFR is at a safe level.
Info for the day

[b16a2]

Originally Posted by Robbie

test pipe wont do much without full exhaust

after buying an intake, getting a test pipe is the most cost effective power you will gain

[tysonzane]

Cheapest way is to just gut the inside yourself and then give the insides to your local scrap metal merchant for $40 generally.

A couple of horse power and $40 has got to be the best thing ever lol .

Put that money towards another free style basic mod. Buy a hondata style intake gasket and do the coolant bypass trick. There is a couple of horse power to be gained there as well .