Just some pics of the eng. I'm building for George. It's just a lot easier for me to post them since I took them and know what stages there at.
These pics show the rb street port layed out on the intake ports and the race port layed out on the exh. On the exhaust I went slightly wider and about .5 mm lower.

 

Here are the rough cuts. Please keep in mind that the irons will be resurfaced.

 

Here are the 80 grit pics. These shots of the are before final shaping and radiusing.

 

Like it says,

 

Parts that are cleaned and or painted. I also included a pic of his set and another set of irons that I was porting at the same time. Just thought it looked cool.

 

Were do you get these resurfaced? I had mine done but looks like all they did was run sandpaper across it!

 

I just have a few questions and, some constructive critisisum:

On that last port in the 4th post, it looks like you ported into the oil control ring area, or do i just have shitty eyes?

Looks like some places the bit jumped out and attacked the iron, and if you get the irons resurfaced, do they renitride them?

ANd on the exhaust ports, it doesn't look like there is too much of a bevel there, after readding tonnes of post by Judge Ito, it seems liek that is a major part of the longevity of his motors, and it also allost for the port to oppen sooner, and doesn't put as much strain on the apex seal, as it comes over the port.


But looks good.

 

Those pictures look great Brent!!

Who resurfaced your irons Ian? A local machine shop can resurface irons for me, but they aren't really sure about how it would effect the nitrid coating. It's not a very thick coating from Mazda from what I've been told.

 

Great job Brent! I Hadn't even gone that far on the primaries. I guess i still have some finishing to do

Anyways, keep it up. Get your car finished, and hopefully i'll see you again at the Ottawa meet!

 

Good eye nismo, that's a pic of one of my irons not george's, got them mixed up I guess, never noticed til you mentioned it. On my engines I port into the oil control ring. I'm not comfortable doing it on a customer's though. I resurface them at work on a large wet grinder. I'm a tool and die maker(my full time job til I get a large enough shop) The marks you see are from me running emery cloth over the rads on the edges of the ports to polish them. The pictures are deceiving. The exhaust ports have a 2mm radius it doesn't show well in the pics because I polished it to a mirror finish. You can see it better in the rough cuts. As for the nitriding, I don't plan on taking more than .002" off anyway. You read a lot about nitriding only being .006" deep. First off I sent stuff out for hardening of all types as well as some stuff I harden myself(at work) and in 10 years of tool making have yet to come across anything that is only hardened .006" deep. It's a mute point anyway, You should never need to take more than a .001" or 2 off. Next thing is the lapping, the irons aren't even lapped from the factory, there blancher ground. You can see the marks if you look closely at the center of the iron where it remains untouched. Thanks for the compliments and good questions. I've read all the write ups from Judge Ito, awesome info.

Thanks again,

Brent ps hopefully this pic helps. I'll take some angled shots so you can see the rad better and post them tonight.

 

Wow, that last pic looks amazing, excellent work. [QUOTE]

 

I had it done at a local machine shop that has been doing a local rotary shops! Or at least that's what they said. Personal I think it was a waste of time and money so now off to find some other shop...........

 

So you lap them? TIme consuming I guess. I tried lapping one myself on a lapping block and lapping compound. Took forever. How much do you figure it should cost to get it lapped or blanched? (Most shops say they can blanch it)

 

this is better than me posting...lol
thanks Brent...


-George

 

I can get a good enough finish on our wet grinder that I don't need to lap them. Other's will tell you different I'm sure. If you want them lapped I'd have to get you a price. As for blancher grinding the finish is no better than our wet grinder, it's just in circles that's all. I'll post pics when these ones are done and you can all decide for yourself what you think.


Brent

 

I don't think I'd want to Blanchard grind the irons myself.

 

Why's that?

 

Looks like I'll be resurfacing the irons within the next few days, should have pics by the weekend.

Brent

 

brent, where are you located? I've gotta look you up when I want my engine done!

Jon

 

he is in barrie....
north of toronto...(about 40 min north)

 

Thanks george. If you want pm me and I'll give you my info.

Brent.

 

How do I resize the pics? Right now there way too big to upload. You really need to see them in person to appreciate them. The front and rear irons only needed to have .002" each removed and the int. plate needed .0035" per side. If I don't get the sizing figured out I'll take some pics on the weekend with my old digital. The new one seems to be set to 1600x1200 pixels.

Brent

Thanks, I just resized them on the dig. cam. and took some new pics. Here we go.

 

You can use 'paint' to resize pictures. Click 'image' then select 'strecth/skew'.

 

wow...that's looks good...
now what colour of paint do you think it will looks good in my engine bay??

my t2 is red....so may be red?

 

wow..times two!!..I can't wait to hear the results on this build!..looks amazing Brent!...hats off to the man!