Since you can't do real massive porting on the auxilary port in the front and rear plate on an N/A engine is it worth while to port the middle plate heavily or will the gains be minimal at best? I'm rebuilding a series 4 N/A engine and don't want to mess the porting up and kill what little torque the engine has(even though the sleeves are removed. The car will be a daily driver and I am going to do the teflon in the aux port trick that blake did on one of his engine's and port that some. I know getting rid of the aux. ports will hurt the mid range some but I'm willing to deal with that as long as its not a massive loss.

 

I have heard you can not go very far acording to Mazdatrix's website. I would go there if I were you.

 

You can't go TOO far, but there's still a decent amount that can be done.

 

Would a TII center housing be a better starting point?

 

I haven't seen a TII center housing in a while, but the stock port size is similar. You can cut a decent amount on the NA housing.

 

uhm, TII center? Why, if anything get Turbo Front and Rear plates. No more 6th ports, and you'll have bigger secondaries to work with, plus you don't use your sleeves.

 

Hey, Node is back. I don't want to change my entire intake setup so the TII front and rear plates are not part of the equation. This is kinda an experiment before I port the engine for my FP car. I'm going to use the factory intake so I don't have to take a weight penalty. 190# is alot when your autocrossing. I can't afford to buy an new intake but I can try to make my car lighter. Its cheaper to cut things out than it is to buy stuff.

I feel my goals will be achieved if I can get 190HP to the rear tires on my FP car. That will give me a power/weight ratio similiar to a stock 3rd gen.