I'm considering making my own "resonated MP" with a muffler that is:

3" Inlet / Outlet
6" Diameter Body
19" Overall Length



would the 6" diameter be a problem with scraping or rubbing?

 

I had thought about doing that too, but if it was s.s. mp, the resonator would have to be and the weld as well.

 

No, it doesn't. You can mix and match mild and stainless steel with no problems. You need to use stainless filler rod or wire though. I have done lots of exhaust work that mixed/matched both types.

Most non-cast turbo manifolds are made this way. The flanges are mild steel and the tubing is stainless. Stainless is not a good choice for flanges because it has a high coefficient of expansion and tends to warp and/or shear off bolts if you're not careful.

Sonny

 

Well, tell me how would you keep the mild steel from rusting? That would look pretty odd to have a nice shiney s.s. pipe with a rusty resonator welded in the middle of it I never said it couldn't be done.

 

I don't know about you, but I don't go around parking lots on my hands and knees looking at people's exhausts to see if they are up to par in the bling category.

 

Well, when it comes to MY car, I want it to be on par in all catagories... whatever floats your boat is none of my concern.

 

LOL.

OK, back to the topic.

What is the main cat dimensions?

 

Most anything that is mild steel these days has an "aluminized" coating on it to deter rust. It's not as effective as stainless steel, but it does work. I'm not trying to bust your *****, HDP. It's just a common "myth" that stainless cannot be welded to mild steel and what you stated above sounded like you were saying that.

If you do choose uncoated mild steel parts, then they need to be painted afterwards with high temp paint. I've used flat black bbq paint in the past and it works great. Durable and stealthy.

Batman: I'll be working under my car tonight, so I'll get some measurements for you.

Peace!

Sonny

 

Sonny, can u also tell me if the above muffler system is too big for a MP resonator?

thanks.....

 

So did anyone get the dimensions for the main cat yet??

 

I took my main cat off Monday. While it's sitting on the back patio, I can take some measuements and report back.

 

Main cat body: 18"L x 9"W x 5"H

 

Yup, and weighs a gazillion pounds

 

What is the ID??

thanks guys.

 

The one problem I wonder about is how it is going to hang. You have a half inch variance to the center of the pipe (accepting HDP's measurements). If bolted up to the adjacent piping (unmodified), you may have this thing riding against the floor of the car. I realize there is a shield, but if all are sandwiched up against the floor, this could get a bit warm. Thus, you will in all likelihood need to modify the adjacent piping or devise some type of spacer to keep it down from the floor.

 

Just use the 12" oval Borla XR-1 muffler with 3" inlet/outlet. Looks like a cat to those who don't know any better, doesn't hang down below the floor pan, and doesn't contact anything when installed.

 

OH ****! I forgot about that... I'll check tomorrow.

 

or just buy an SR resonated midpipe....very nice piece, great sound and streamlined design

btw, alain, how are you "getting away" with a mp in hyper smog sensitive CA?

I still have my MI tag on after 5 years, lol....never been tested

 

pretty sure batman is banned, so he won't respond under that screenname.

And as far as SR goes, I have heard nothing but bad stuff over the years. Better to weld a magnaflow in your midpipe rather than support that dude.

 

what bad stuff did you hear Rich?

I've had mine on for almost three years....no problems

edit: forget it, you are talking about Shane himself I guess

 

Ted, who Rich knows just got his FD with the same Edelbrock Tru-Flo that BATMAN has and will post sound clips of just how gosh darn great the muffler sounds.

Smog is tested every 2 years.

But some cars after a decade are on the every year test list.

 

you need some "quick connect" fittings to re-fit your cat and air pump connection at sniff time batman

the smog in your area is so thick perhaps I would use a cat

 

all I can say is....don't go over any speed bumps with this sucker

 

What the hell did he do this time?

 

2 3/8"