myvi 1.3 first gen cant accelerate above 120 km/h

[vr2turbo]

No i think the problem was caused because my s flow (jian hang) and mid swirl bullet (kent wong exhaust) both have the function of storing backpressure in the exhaust system n cause too many pressure in the exhaust system not allowing the pressure to exit smoothly n my rpm cant rise smoothly.... if im correct la

But S flow also straight through muffler, only it return and then out again as in S. Why got so much back pressure?

 

[sweelt]

need to "CSI" the s-flow muffler

 

[vr2turbo]

need to "CSI" the s-flow muffler

Maybe is the mid bullet......lol

 

[parakey]

Maybe is the mid bullet......lol

+1

I also think it's likely that

 

[Triple Y]

the mid bullet n the s flow both got store back pressure
because when im using the same s flow on my kancil also got the same problem because the exhaust guy install a tube in the mid bullet n cause my kancil rpm not running smoothly after removing the s flow n replacing with another mid bullet the power is better

mean if want use the s flow (jian hang) mid bullet must be normal one not swirl type

 

[parakey]

after changing to straight flow can reach 140 easily.

At 140 km/h, what's the rpm of the engine?

 

[Izso]

No i think the problem was caused because my s flow (jian hang) and mid swirl bullet (kent wong exhaust) both have the function of storing backpressure in the exhaust system n cause too many pressure in the exhaust system not allowing the pressure to exit smoothly n my rpm cant rise smoothly.... if im correct la

It doesn't "STORE" backpressure la. Backpressure is when there is resistance for the exhaust to exit la. Like I already told you - remove the bullet lor.

And for exhaust to cause speed issues like that - your exhaust system must be pretty damn restrictive!!!

 

[ixeo]

Stock car can go faster than his "modded" car. So he spend money to make his car slower.

 

[vr2turbo]

It doesn't "STORE" backpressure la. Backpressure is when there is resistance for the exhaust to exit la. Like I already told you - remove the bullet lor.

And for exhaust to cause speed issues like that - your exhaust system must be pretty damn restrictive!!!

Not extractor then, have strangler......lol

 

[Triple Y]

I removed the s flow already now using straight flow

 

[Triple Y]

The s flow was taken out from my previos kancil n the myvi stock exhaust system was having worn out gasket n stuck muffler.... that why i changed it...