midnight_7

just wanna make sure since i saw it in kevin landers' website.

streeports on an n/a engine might, or will, affect low end torque......does that mean decrease it?

any of u s/p drivers out there have your own experiences?

thanks,
Carlos

RETed

Not necessarily...

There are as many variations of a "street port" as there are fish in the sea.
There are rules-of-thumb, but that doesn't mean everyone follows it.

A street port can reduce low-end torque.
For the most part, unless the street port is extreme, it increases power almost all across the RPM band.


-Ted

midnight_7

so basically, a mild streetport is a waste of time compared to an aggressive one?

im asking as i dont want to get a streetport rebuild just to loose some of my already low torque.

RETed

No, it depends on your needs and how much you're willing to spend?

A very aggressive street port can cause a slight loss of low end power, especially when the port significantly opens sooner causing more overlap - overlap kills low-end power.
But, this same aggressive street port will increase significant power at higher RPM's (generally over 4kRPM).

So, it becomes a delicate balance of a slight drop in low end power versus the increase in top end power.
If you have messed with cam selection for piston engines, it is very similar in process.


-Ted

midnight_7

thanks, Ted.