port work/first rebuild

[sk8world]

Originally Posted by David Jerome

Looks great, on the 3rd picture near the closing edge of the port(bottom in your picture but in reality the top of the port), look at where the runner for the port transitions. Grind as much of that away as possible to make a smooth transition for the air flow. Also "back cut" the opening edge(long edge) of the port by making it flow smooth with the runner. While doing this make sure not to let the porting tool hit near the oil control ring path on accident and cut into it.

It really looks great honestly, sorry I didnt reply sooner I missed this thread.

David

I did back cut the opening edge, I could take of a tad more but not much. The pic is angled to showthe back cut. I think that is what makes the lower are (closing edge) apear to need more taking away, although more was removed later. Believe me, I did not port these the smartest way. I totally finished one, started the other and discovered many areas that needed work only to go back and forth remove more and more. I will post the final pics... The hardest area for me is the bowl area. Trying to get a nice clean finish takes so long. Any idea's? I was using a polishing (green) round stone that took forever... Maybe 4-5 stones and 2 hours on each plate. Also the center plate is going to be fun port matching it to a RE mani. Mucho to remove.....

[David Jerome]

Originally Posted by sk8world

I did back cut the opening edge, I could take of a tad more but not much. The pic is angled to showthe back cut. I think that is what makes the lower are (closing edge) apear to need more taking away, although more was removed later. Believe me, I did not port these the smartest way. I totally finished one, started the other and discovered many areas that needed work only to go back and forth remove more and more. I will post the final pics... The hardest area for me is the bowl area. Trying to get a nice clean finish takes so long. Any idea's? I was using a polishing (green) round stone that took forever... Maybe 4-5 stones and 2 hours on each plate. Also the center plate is going to be fun port matching it to a RE mani. Mucho to remove.....

I dont take the bowl down past a normal orange sanding stone, you can really change the final texture by the pressure you apply, I dont believe it really smoothing stuff out to the polished level, mazda doesnt do it with the renesis and if I remember correctly even have what they call the "Anti Wet" port on the renesis to help with fuel atomization.

[sk8world]

Originally Posted by David Jerome

I dont take the bowl down past a normal orange sanding stone, you can really change the final texture by the pressure you apply, I dont believe it really smoothing stuff out to the polished level, mazda doesnt do it with the renesis and if I remember correctly even have what they call the "Anti Wet" port on the renesis to help with fuel atomization.

yeah, I read the pros and cons on both a tad rough texture and smooth polish finish.. Well see how it goes....

I have a few more issues I have to figure out if anyone has the anwser's on here that would be great...

When running a RE mani can and do some run the REW TB? or best to run the RE? It has the linkage on the wrong side and the TB sensor is differant..

The fuel rail is differant on the RE.. Do shops sell the afftermarket rails for this? And what about the mounting points for the rail, the are on the top...

I feel this mani and port work shouldflow a good bit more air cant wait to put it on the dyno to see if it ws all worth it..LOL