I made my first attempt at freestyle porting a primary port, and will try to upload pics. Since I can't try that in the test forum, I'm doing it here. Hopefully the image will be of a S4 NA primary port.

 

Ah, it went through. That was the stock port. Very small if you ask me!



Here is my interpretation of the porting rules, trying to follow the outline I posted a few posts ago. The opening is a little earlier and closing is a little later. I ground down the tail and inside mostly, and spend a bunch of dremel time on the inside near the "roof" and bowl. I tried to make this one very curved for a broad power band, and maintain relatively mild timing.



I ground into the oil ring track a little, about a half a mm. How bad was that? No one seems to do that, judging by the pics in this thread.

 

well i finally got off my *** and started porting the housings for the guy (good he has a new S-10 to drive so i'm not rushed..hehe). i 'll post a few pics starting with the duct tape trick i mentioned a while ago

 

here's another

 

after the hacking

 

also a question for the porting gurus. on this one, which is one of mine for my summer 13B project, notice the bottom of the bridgeport how it is a little rounded from the drilling? i am wanting a to build this with reliability in mind and do not want to have to cut the inner water jacket seal out of the equation. the question is, seeing this port, would it be safe to say that i WON'T have any problems with water seeping in or causing an issue?

 

looks awefully damn close to the coolant seal^^^^ Better be carefull with that one.

 

because your using first gen. side housings, You will not have any problems with the coolant seal. The rotor housing holds the gasket in place and will keep the gasket from walking into that part of the plate the you ported into the coolant seal. I could see in the picture that you still have enough room for the coolant seal and be safe. Nice job by the way..

 

Judge! You're back! Managed to get that Cosmo plate ported. No problems this time Engine is just about together and in the car. Because the intake ports are much larger on the Cosmo, the FD metal gasket doesn't fit. Compact Car (Naples) is using gasket material to make a gasket instead. But I know after a while that they rot out...so my question is this: does a metal Cosmo RE specific gasket exist, and if it does, where can I get one? I've attached a pic of the gasket which illustrates the difference in port size for the intake primary and secondary. A stock gasket was used first which is why the gasket port sizes look different. The primary, left side has been cut out to "cosmo" specs...mind you I did not enlarge the runners at all. The secondary on the right side has also been 'cosmoized". The other two are FD stock size. Quite a big difference! With any luck, I should have the car up and running this week. I have many more pictures to post, but I'm very short on time as of late.

 

What a coincidence, I'm making my own gasket right now also I still have a little cutting to do it yet though.