Williams707

gregory13lil

DAMN..I like your POLYURETHANE suspension upgrades!! Did it make the ride smoother?

Aaron68

Polyurethane bushings gives you a firmer ride/feel therefore not giving you a smoother ride but it makes for a more solid feel when driving. At least in my opinion based on my other cars.

Ghostrider

I would have to agree...

Ghostrider

Ok, thanks to WiLL and dlb on the pictures!!!

I believe we are cooking with gas now fellas and we can keep moving forward.

MarcusF

The J-spec cars have no pre-cats and only one pair of O2 sensors? nice . . . .

Williams707

I would not say it is smoother but I get great road feedback. I have two spare POLYURETHANE bushings if someone wants them.

Can you translate what you just said What is the difference between the US and Japan Spec CLKs? What does this translate into?

Seems there are some differences between the US Spec and Japan Spec exhaust systems, would this be a problem?

Can someone explain to me what the two small muffler looking thingies are in the center? What is my Supersprint Muffler and Resonator connecting too in the center with the Y pipe?

dlbehrns

J=Japan. What Marcus is saying Jimmy is that your car only has one set of cats back where the second set sits, or somewhere there abouts, on US vehicles, as well as only one set of O2 sensors. Now that I think of it, that could have everything to do with the Powerchip tune turning out as poorly as it it did. U hav verwy stwange caa Jimmyson.

MarcusF

David got it exactly right. US spec (specification) cars have four cats. Two up front, one on each side. The two lumps on the left side of this photo are cats. Pre-cats/warm up cats, or whatever you cats are calling them nowadays. You appear to have just pipe there.



The only pair of cats on your car sit exactly where my second set of cats are, but I don't have the little bracket that you do.

HEY, your exhuast looks just like MEL'S, but FACTORY. Hmmm . . . . . . so Mel is selling ultra-rare J-spec (Japan Specification) exhaust. I wonder if it's that way for all ROW (rest of [the] world - anywhere outside the US) CLKs . . . . . . just two cats . . . . . .

Williams707

Thanks to all you Cats for squaring this Cat away about CATS. lol

tastoto

lool william your pics come out clean what camera have you got

Williams707

Canon 50D but I don't have a clue on how to use it.

GiZzO

Oh come on IT guy . Under valueing your skills you got the focus just right.

Ghostrider

Marcus, looks like you let my secret out!!!

This also happened in the C63 forum with the USDM vs. ROW airboxes.

https://mbworld.org/forums/engine-pe...onverters.html

AMS Performance

All you need are some high flow metal core 300-cell cats and you should make decent power. The high flows are $150-180 for the pair.

MarcusF

I’m lost. Suppose he buys a pair of 300 cell metal cats, and each can flow 500 CFM.

He has a 3.2 liter. The absolute maximum CFM his engine could flow is 339 CFM (6000 RPM at 100 percent volumetric efficiency). Now, 100% volumetric efficiency is WAY HIGH/impossible, but we’ll use this number. Since half his exhaust flows through each cat, that means each cat has to flow less than 170 CFM. What good does it do to buy a cat that flows 3 times as much as the engine?

If he HAS to replace the cats anyway, sure, buy 500 CFM cannons. If he doesn’t need cats, and his factory cats flow more than 170 CFM, isn’t a new pair of cats a waste of money? It’s like buying tires that are rated for 300 MPH, when the existing 170 MPH tires are perfectly good AND the car is only good for 150.

AMS Performance

With headers you will definitely need upgraded cats to take full advantage of them. The stock cats are very restrictive and do rob power.

deyainrdy4ds

when i saw the pics, i thought he was showin us that he deleted that first set of cats lol forgot hes in Japan

MarcusF

Headers don't change the fact that 3.2 liters can't flow 340 CFM at 6000 RPM. It’s the physical limitation of a non-boosted engine. The only way that cats are a bottleneck is if they don't flow 170 CFM. If you're saying the OEM cats can't flow 170 CFM, we'll have to agree to disagree.

Ghostrider

My advice would be to delete the cats and install a better flowing Y-pipe, but that's me...

BAYCLK

Nice...

Williams707

In Japan, one CAT mod they do is to open the CAT and run a straight pipe on the inside. Japan Car inspections only check under the car to see that your CATS are there.

MarcusF

HA HA. That's the Rx-7 mod. Cut off the tubing, split the cat, lay straight pipe with flanges in the hole and weld it up. It's much better than hollowing out the cat because there's no low pressure zone. On a TII, the increase in boost is a nice side benefit.

Ghostrider

Now that's what's up!!!

deyainrdy4ds

thats essentially what i did to my first set of cats (the ones you dont have)....just took them out and gutted em and blew everything out....so theyre empty basically like a straight pipe...the second set of cats were deleted for straight pipes that were welded in