Ranzo

Ok more templates. The file name is Pan Speed but these pictures are from a company called ERC. Can't remember what that stands for but they are well known with Rotaries.





Explanaition: The top left picture of the exhaust ports shows a mild port job. The caption explains that the exhaust housing should be made to match up with the turbine you are using. Garret turbines require more exhaust pressure so bigger is better.



The picture below that one is another exh. port I don't know how well you can see in this picture but it has a steep angle at the top. The caption refers to Mitsubishi turbines and High exhaust pressure, If the pressure is to high the feeling will fall off at high RPMs with mistubishi turbines so keep it smaller and work with the angles to maximize.



The rest of the shots are of a standard side port and it explains what a sideport is and how the ports are grinded completley from entrance to exit and that the template is just a guide for the shape at exit.

j9fd3s

my gut feeling is that the turbo has a lot to do with the porting and vice versa. you want a balance between what the turbo can flow and what the motor can flow.

kahren

one thign i noticed is that it seemsthey port teh primary a lot more then we do here in the states atlest for the size secondary that they are runing, we tend to port the sconday a lot and nto so much on the primary.

Ranzo

FEED ( Fujita Engineering) Typical sideport template of sorts.....

kahren

in the states i think there is a diffrent approach to that, the fd primary plate has less overlap then a t2 plate and it seems they port it to the t2 overlap and add duration as well, i dont think many peopel port the primary plate like that, unless you dont care about teh low end. they berely do anythign on teh secondary plate and it seems that they do that just to clearthe casting imperfections.

RETed

Cause a lot of people don't know what they are doing.

I can't even count the number of times I've seen porting work from a "rotary expert" that looked like crap.



The Japanese do not tend to be very experimental, versus the US which creates a lot of crazies who try a lot of experimental stuff. Therefore, "secret" techniques like rotary engine porting tend to be very mild and work between all the shops basically look all the same in Japan.



I know the Japanese shop do NOT like porting the FD3S housings that much, because they make a LOT of power just with the stock ports. If it ain't broke, why **** with it?







-Ted

RETed

Elite Racing Corporation

Boo on you Ranzo





-Ted

sleeper7

Ted

Tell the Drift video guy "what's up" for me.

chuck

kahren

exactly, a lot of times people go too big, on what is already known.

there is no point to port your fd plates crazy if you are only goign to do

400 or 450 at the wheels. the japanese i dont think normally tune fo rthat power,

they look for a more blanced car rather then a "supra " (keep the flaming to yourself). stock port can do 400 at the wheels withotu too much hassle. in japan i think its more of the "turn up teh boost kinda deal rather then port to hell that is here"

Apex13B

lighty porting a FD'motor will cause a properly sized single turbo setup to spool so fast that you'll think a 410 chevy is under the hood. It just pulls when you tell it to, and it pulls every where.