How to increase power for 1.5 wira

[kenchao10]

Having wira 1.5 injection.

Part changed and added in includes:

HKS Air filter
4-2-1 extractor and full piping
voltage stabilizer & Groundings
Front cover bonnet have been jet up
15'' Rim
Potenza RE711 tires

Question:
What more can i do to modify to increase power? Goal for me is smoother driving with better power performance, reach fuel effienciency, and economy for maintainence.

 

[kenchao10]

update

 

[Soundstream]

get a,

-powerzone camshaft with adjustable cam pulley
-flywheel
-intake manifold...tb....

major.

-HALF-CUT ..


hehhe

update

 

[kenchao10]

update

 

[Powerzone]

First stage is put in a hi-performance camshaft and tuned length extractor kit.
Next, ported head.
No need for many gadgets.

 

[Soundstream]

Hi POWERZONE,

Can you emphasize more on your statement as per below..

After change HI-Perofmrnace camshaft and tuned length extrator kit...

what is tuned length extrator kit ....?

Thanks

First stage is put in a hi-performance camshaft and tuned length extractor kit.
Next, ported head.
No need for many gadgets.

 

[Powerzone]

Most people buy the standard "chap ayam" extractor in the exhaust shops, but few know that the important factors are the pipe sizes, lengths, and configurations. Most mistook bigger sizes for performance, which is baseless.
Tuned length refers to choosing the right pipe sizes and lengths (for primary and secondary pipes) after careful calculations based on established physical formula.
Designing extractors is an engineering science, which I don't think the "towkays" making those chap ayam extractors actually consult, do you?
So, there is a difference in the design and make of extractors, not to mention the build quality and details to prevent poor air flow.

 

[hayabuza]

hi powerzone...

my engine is a 4g15 sohc carb...
how much is the power increase if i changed to PZ camshaft and extractor...
does the carb needs to be tuned as well?