Oh hell yeah on that pipe 2.25 for ~2", smooth Burns transitions to 2.5" for a little then another to 3" right before the WG blends. Yummy.

Bellmouths worked well for me, paul, artie, and the subie crowd tends to see better results with them than with the divorced WG setups. Plus there's still people giving BEGI grief over the flapper blocking the WG tube which even though it isn't true you still have to convince the buyer otherwise.

I don't know personally what would be better performance wise. Bellmouths are a little easier & cheaper than divorced...IF (big IF) there is a positive difference to divorced WG's, is the few extra hp worth the much extra $?

If there was demand I could do one. Actually that first bend would probably be easier. That downpipe I made for evan K does look sexy and it was surprisingly easy to do Maybe it's been too long to remember otherwise. Divorced WG on the "standard" Absurdflow manifold would be pretty easy to do...hmmm

 

No problem here. Structurally, it is not all that different than our manifold. Very artistic though.
Stephanie

 

ONLY the MSM gets a CAT. So your price listing is slightly mis-leading.

And the 3" outlet is not always needed. All NB downpipes that end in 2.75" will bolt up to a 3" exhaust making the 3" outlet a moot point. The only time a 3" outlet would be needed is on a NA car. Then it locks you into a 3" exhaust becuse it will not bolt up to a stock size or aftermarket size exhaust.
Stephanie

 

Thank you Steph, that means a lot to me.

I do not want to be misleading. Thank you for the clarifiation.

Why does only the MSM get a cat? What if I want to purchase a 3" metal cat for my '94 1.8 to go with my stainless SGDP? Is the price not $240 for a 3" metal cat for a '94 1.8?

 

Tim,

Awesome work!! It's good to see this thing coming along!

 

I'm thinking even simpler than that. just run the WG line 6 inches and tie it into the main pipe there. i forget how much space the WG needs to open though.

here is a not to scale view.

 

wait. i've seen this somewhere.

on the left:

 

That was about 14.5psi Tim. Heat soaked like a ************ as well.

 

Tim, that's gorgeous. I'm eager to see how much better it flows vs. a cast BEGi piece. I wouldn't mind stepping up to a nicer exhaust manifold one of these days.

 

Befitting its owner.

 

Because the 1.6L, 1.8L, and 99-04's have the cat in the mid pipe. No reason to add a second one unless it fails emissions. It is only stock in the downpipe/header pipe on the MSM. The MSM then has a second CAT in the mid pipe. Strange, but that is Mazda....
Stephanie

 

The point here Stephanie is if you want to get a better flowing DOWNPIPE AND CAT for your turbo Miata, Tim's setup comes out cheaper than buying your downpipe and a high flow cat from you. What's the point of going with a better flowing downpipe to force it throw a restrictive factory cat?

Tim's setup reaches and bolts up to 90-97 factory and aftermarket catbacks.

 

Why?

 

because your prostate is sensitive?

because that bellmouth will impede flow. you'll get turbulence coming out of the turbine.

 

Oh yeah, I noticed that on my last 3 dynos sessions.

 

ok i know you get snippy when people question how awesome your setup is. i only said 100 rpm sooner spool, not 300 more horsepressure.

 

im glad i have the shittest wastegate outlet design possible. if my exhaust flowed any better i wouldn't be able control all the creep. i still make 11psi on a 6psi wastegate.

i have a 2.25" outlet, no bellmouth.

 

So with my 7psi actuator (that is most likely blowing open from the inside) I should make over 200ft-lbs of torque at 3050rpm instead of 3150 if I get a separated gas design? Sweet. Tim, get on it.

 

you might. see when gases flow through a change in cross section, the flow velocity decreases and creates backpressure.

it's the same reason you dont want to (ahem scott) run a gutted cat instead of a straight pipe.

 

Isn't this what the new BEGI standard pipe is? I guess just not 3"?