Since I'm waiting for some parts to put my engine back together, I decided to share some pics of my Cosmo parts. I disassembled my throttlebody, discarded some unnecessary parts, filled in the idle port, smoothed the inlet side, and polished the outside. I filled, smoothed, polished, and Extrude Honed the upper and lower intake manifolds. The Extrude Hone is expensive, but the results are usually very good. A friend picked up 5% in peak torque and HP, and I think his results are typical for a cast long runner intake.

BTW -- if you disassemble your throttlebody, take lots of pics -- it makes the reassembly much easier.

 

I only removed my secondary air blocking valves, along with the shaft, and didn't use the thermowax on mine. Good job there.

Hey I just noticed you removed the ACV port and perhaps added a brake booster fitting. Nice!

 

very nice, one question tho, how do you remove the lettering and have it look like it never had letters?

 

Thanks -- what's thermowax? Are you referring to the stuff I filled the port in the throttlebody with? I used JB Weld for that.

The added fitting on the LIM is just a threaded boss to retain my turbo oil supply line. It's so big because it was the only size aluminum stock I had laying around.

 

I ground it off with a belt sander, then used a long board to diagonally sand it smooth -- like doing body work. It was kind of a joke in the house because I would do it sitting on the floor, sanding block in hand, while watching TV with the family. Everybody was used to the sound.

 

Very nice job!

 

You need a TV in the garage.

 

Good idea -- except my garage is so crowded with tools and bikes and skateboards (and my RX) that I'd need a very small one. If anybody has a donor kicking around, something in the 13" range . . .

 

I do, but it's in my garage. Sorry.

 

we just got rid of a sony 15" lol