6 port large streetport

[N.RotaryTech]

I for one do believe in the 6-port engine. One reason is that most everyone doesn't believe that they are capable of more power.
Although I don't have many 6-port engine experiences I do have a few.

My first one was a S5 6-port with a "Mild street port" that was built by a builder in my state.
This motor sucked. Even with the few mods I had on it: RB pre-silencer and mufflers, emissions removed, AC removed, k&n air filter. It dynoed at only 130hp.
After 5 years of driving it I tore it apart to see what was done to it. This is what I found:

The center iron was ported like this:


The end irons were ported like this:
(The plastic is a poor template I made from stock ports.)



My second motor I swear by. I built it and ported it.
Although this motor is a half bridge port S4. Mods were where the previous motor left off, but with the addition of power-steering removed, and a Clutch Masters stage 2 Carbon Kevlar clutch. Also, stock ecu, stock transmission, etc.
This is what the end irons look like:



The center iron was stock.
Most of the performance I'm about to go over is probably because of the bridge ports.
This motor would spin the top of 1st, chirp 2nd.
It reved fast.
Power was felt from 4k to 6.5k rpms. When in that range, it hauled ass.
The drawbacks were no guts below 3k rpms, and it was a gas guzzler.

My 3rd motor is what I have in my FC currently. (Using the 1st engine I mentioned) end irons and a stock port center iron. S4 rotors. With the addition of a haltech E6K.
I believe it has more power than my first motor. Better gas mileage too.
I really should get this dynoed.


Just my 2 cents from my experiences.