Settle down everybody, we still got 5 days. I'll build to suit, you want a mandrel bent pipe I'll make it happen. If I am going to prove you right I have to do it your way.
Flex pipe is the easiest fitment past the trans. My car currently has flex pipe in the same location.

Mandrel bends are nice, I use them. You can get them fairly cheap on mandrelbends.com. If you're gonna go to the trouble to build a new exhaust, at least do it somewhat-right. You can build a mandrel bend aluminized 3" system fairly cheap.

There is 1 local mandrel bender if his turn around inst fast enough I'll get it from mandrelbends.com even pay the 40 to next day it so I have it by Tuesday.
Dyno Tuesday or I'll gtfo on my own accord in a dunce cap, make it easy on the MODs.(I've also been fasting, not because its Ramadan, but because if I have to eat my own words I wanna do so on an empty stomach)

lol

The only reason we took particular issue with you is because you deliberately challenged the collective knowledge here.

It's one thing to be new, or wrong, or plain dumb. It's another to call out the community.

That is all. We don't care enough about you to hate you, or have any negative feelings towards this thread.

This is amusing :)

PS: I'm glad you're not salty about it. There's hope for you yet ;)

Like I said earlier, I've never been so excited to be proven wrong.

Thanks for the link patsmx5, the shop in town sold their mandrel 2 years a go to a different local company, and that company is closed Fridays. So ordered it up should be here tomorrow.

Alright. Here is a 2.5" vs 3" exhaust.

Only difference between these 2 runs was a 3" exhaust, 60psi base pressure (instead of 43.5), and about 10 track days and 10k street miles.

Same dyno. I'm still missing some spool from EBC tuning.

https://www.miataturbo.net/attachmen...ine=1466989565

Is that 30ish tq?

10-20ish. MAP doesnt line up exactly. But where it does the 3" wins every time.

:likecat:

10-20whp is literally nothing.....

But there are small gains to be had overall. Granted those same gains can be had by running a whole 1psi more or removing your spare tire lol...


todays the dyno day right?

20ft/lbs over 500rpm is definitely something. thats over a 10% increase.

bro he owns a 2jz
1000whp is minimum for basic bolt on grocery getter

lulz

I think many people dismiss the flow gains of 2.5" to 3” because they see it as a 20% increase in size, when it's actually a 45% increase in size.

Bitches love 45% more girth.

https://www.miataturbo.net/attachmen...ine=14671664132.5" exhaust

https://www.miataturbo.net/attachmen...ine=14671664133" exhaust

Same day same dyno?

Can we get some non-potato plots?

not same day

First one is from 55 days and 800 miles ago

Interesting. Do you have any run files?

This is from the run.