we shipped an EFR 7163 IWG single scroll kit to singapore this week for use on a 2.2 4b11T evo X motor- ill see if he can post results-

cb

 

That would be great, but there are 7163 4B11 dyno charts out there. We are all itching to see a 7163 4g63 dyno chart.

 

Too bad the tilton evo is retired now.

 

This is a great article with a lot of fantastic photos, thanks for the link. I'll probably copy all 9 pages out as mht files to save on my computer, in case they take this off the web.

 

 

So if WPC is like shot peening, how did the treated surfaces "wear off" in less than 100 miles? What did you measure to say the treatment was worn off? Did you take pics of the metal surfaces under a microscope?

Also, what did Izumi say?

 

This is correct.

Nitrous wasn't used as an anti-lag, it was used to increase horsepower down the main straight.

Yessir, it's two 7163's or a 9180 now.

 

Drivetrain parts are under extremely heavy strain, and I can see why they would "polish" after a few hundred miles, but that doesn't mean the WPC treatment hasn't affected the part.

The better question is, why was he taking his transmission apart after 100 miles?

 

The matte gray surface from the treatment isn't the actual treatment itself, just a side-effect. So just because the surface went back to a normal colour - doesn't mean the treatment hasn't worked.
What Erik said

 

Not true. Its a 9180. Saw it in the flesh at EvoNats and WTAC15, also had a discussion with the Tilton tuner who confirmed this

 

I definitely liked the article!

 

Yes and I noticed that if you want to see the pics a little better, you can. They show as 700 x 467 resolution in the article, but if you right click on one and save it to your computer, then bring it up in your regular photo viewer, they are actually 800 x 534.
Also, if you save each page as an .mht file type (you need Microsoft Internet Explorer to do that) you get it all, and if it turns out that you don't have IE anymore someday, you can still open up the mht files very nicely in Microsoft Word. They sometimes don't work in Chrome though.

 

Obviously I didnt take pics of them under a microscope, lol, but I have built quite a few motors/transmissions and know what things look like and every thing looked like it hadnt been treated at all after only 100 miles.

Do what you want with your money, Im just sharing my experience.

I didnt bring it up to Izumi because I do not feel the need to. I did the WPC treatment because I wanted to try something new with my car to see if it will help. I knew it was a gamble and I am not worried about the money lost.

I have a bore scope and I am OCD with my car, so that is how and why I can see what things look like after only 100 miles.

 

The WPC treatment is stated to produced a modified layer that is only 0.001" thick. I'm wondering if this is somewhat analogous to waterjet peening that is used in various industries. Waterjet peened surfaces have a highly strained/hardened nanocrystalline layer that is ~0.001" thick, but additional hardening occurs beyond that layer to a depth of as much a 0.005" depending on what article is read.

Anyhow, there is a chance that some of the WPC affected surface layer remained even with the surface having a polished appearance. I think it would be necessary to cross-section a piece to determine whether it had really been worn through.

 

For example, the valve tappets looked exactly the same as a non-treated tappet with any miles on it.

I did the little test of 2 valve tappets spinning on top of each other and the WPC treated ones spun significantly longer than the non-treated tappets. There is definitely a reduction in friction while the treated surface is intact. However, that was immediately after I received them from being treated and before they went into the motor.

I have zero interest in trying to ruin WPC's name as I know there are people who have had success with it. I am just sharing my opinion