Stock header modification

[pcs]

are these available where you are located?

 

[Busa4Fun]

are these available where you are located?

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Yes they are

 

[pcs]

a pc could get u close with your a/f ratio if dyno tuning isn’t an option. if shipping want so expensive i would sell you this one

 

[Busa4Fun]

a pc could get u close with your a/f ratio if dyno tuning isn’t an option. if shipping want so expensive i would sell you this one

Unfortunatly yes.. the two options is doing a flash or buying a pcv.
For the mod of my headers is it now à full exhaust ? Will i gain hp with it ?

 

[pcs]

you can gain hp on a stock engine with tuning. the factory uses conservative tuning. with your modified exh you will gain hp with any type of proper tuning

 

[Busa4Fun]

you can gain hp on a stock engine with tuning. the factory uses conservative tuning. with your modified exh you will gain hp with any type of proper tuning

Okay thanks , here's the spark plugs what do you think about them

 

[sixpack577]

Okay thanks , here's the spark plugs what do you think about them

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They don't look bad, or lean, some wear, but they're ok so long as the bike is running well.
Iridium plugs have a longer life than regular plugs, but, if you have new ones you might as well change them.

 

[pcs]

id personally replace them but if u on a budget you can clean them, recheck gap, and puts some anti seize on the threads.

 

[pcs]

 

[Busa4Fun]

Thanks a lot guys for your time and your answers.
I will change the plugs, i already changed the coils.
May sound like a noob question but i will ask
Is my modded exhaust now a full exhaust ? Or the primary tubes makes it still stocky ?

 

[pcs]

full exhaust is just motorcycle jargon for replacing the entire exhaust system. ive heard some people use “3/4 exhaust” when your remove the cats and and your own muffler. on some machines the stock head pipes are just as good a aftermarket for your intended hp range.

 

[Busa4Fun]

Okay thanks a lot

 

[Berlin Germany]

(...) but i did not mod the primary tubes they are Still stock size (38mm) should i mod them too ?

please don´t - the header´s dia is calculated by suzuki engineers to give/allow max power and torque
it´s not a turbo where a dia-oversizing could help the turbo´s breathing out.

 

[Berlin Germany]

They don't look bad, or lean, some wear, but they're ok so long as the bike is running well....

and

the engine starts (gentle/quick) like when plugs were new

Iridium plugs have a longer life than regular plugs, but, if you have new ones you might as well change them.

iridiums at the gen1 make no sense at all - near double priced than the standard ngk´s and ngk-standards-lifetime at around 12-14000 km
(prizes here in germany : ngk-standard ~9 € , iridium ~ 16 € at a usual parts dealer - so ur only wasting money - my guess)

and if it should definitely be iridiums !!! LOOK which one u use !!!

there are two spec. types of´em 4 the busa on the market
1. the CR9EIX ONLY for gen1
2. the CR9EIA-9 ONLY for Gen2

after a 1h phonecall with an ngk-engineer , a year or so ago , i learned that the gen2 iridium (the CR9EIA-9) can cause massive issues (up to demages) at a gen1 engine
quotation:
the spark position of the wrong iridium (CR9EIA-9 from the gen2) is - at the gen1 - too far/deep in the combustion chamber,
what then , in the long run , probably leads to serious damage to the piston etc. .

so watch out which iridium at which bike u use in the future !

 

[sixpack577]

and

the engine starts (gentle/quick) like when plugs were new



iridiums at the gen1 make no sense at all - near double priced than the standard ngk´s and ngk-standards-lifetime at around 12-14000 km
(prizes here in germany : ngk-standard ~9 € , iridium ~ 16 € at a usual parts dealer - so ur only wasting money - my guess)

and if it should definitely be iridiums !!! LOOK which one u use !!!

there are two spec. types of´em 4 the busa on the market
1. the CR9EIX ONLY for gen1
2. the CR9EIA-9 ONLY for Gen2

after a 1h phonecall with an ngk-engineer , a year or so ago , i learned that the gen2 iridium (the CR9EIA-9) can cause massive issues (up to demages) at a gen1 engine
quotation:
the spark position of the wrong iridium (CR9EIA-9 from the gen2) is - at the gen1 - too far/deep in the combustion chamber,
what then , in the long run , probably leads to serious damage to the piston etc. .

so watch out which iridium at which bike u use in the future !

The OP has a gen2

 

[Busa4Fun]

please don´t - the header´s dia is calculated by suzuki engineers to give/allow max power and torque
it´s not a turbo where a dia-oversizing could help the turbo´s breathing out.

I'm asking that because a friend of mine have an akra full system and he have a 42mm diametre instead of factory diameter in the primary tubes

 

[Berlin Germany]

I'm asking that because a friend of mine have an akra full system and he have a 42mm diametre instead of factory diameter in the primary tubes

yeah - the akra is a special thing and it is measured deeply by akra

i suppose - that can´t be transported easily to other headers etc.

 

[Busa4Fun]

So what do you think if i mod my primary headers like the akra because when i modded mine i was refering to my friends akra headers

 

[sixpack577]

So what do you think if i mod my primary headers like the akra because when i modded mine i was refering to my friends akra headers

Length is an important part of the down tubes, there are small differences between brands based on their research from dyno tuning.
The bends and angles you see are not just for fit, they do have function, and a little difference can go a long way.
The difference in length of each of the 4 down tubes is to time the exhaust pulses, so that they arrive at the collector(one large pipe) at the correct time, to maximize the flow, and each pulse pushes the next out, instead of them clogging up together.
This is a big part of where extra power is found in aftermarket headers, not just larger diameter pipes, and too large can reduce back pressure(which also helps to time the exhaust pulses) and decrease power.

 

[Busa4Fun]

I see, so i will let the primary tube stock then thanks