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-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   Hood dump pipe AFR reading (https://www.miataturbo.net/diy-turbo-discussion-14/hood-dump-pipe-afr-reading-98710/)

matrussell122 12-06-2018 01:40 PM


Originally Posted by 18psi (Post 1513706)
he just bit the pillow and took it. allofit. like a man

At least he only had to take all 3"

sixshooter 12-06-2018 01:58 PM


Originally Posted by matrussell122 (Post 1513713)
At least he only had to take all 3"

He had it coming to him.

borka 12-06-2018 02:07 PM


Originally Posted by Jacobmx5_ (Post 1513678)
Upon further investigation there shall be no dump pipe. Thanks for the inputs.
Does anybody know where i can Scavenge 3 inch exhaust piping.

i doubt you can fit a 3" downpipe and have an EWG all go into the exhaust.
not enough room to work with behind the turbo.

what manifold you have? pics?
turbo outlet vband or 5 bolt flange?


Jacobmx5_ 12-06-2018 02:23 PM

Top mount cast manifold. Post picture later
5 bolt flange

codrus 12-06-2018 02:38 PM


Originally Posted by borka (Post 1513722)
i doubt you can fit a 3" downpipe and have an EWG all go into the exhaust.
not enough room to work with behind the turbo.

Sure you can.

http://www.codrus.com/miata/fm2r/engine-and-tranny1.jpg

--Ian

borka 12-06-2018 02:45 PM


Originally Posted by codrus (Post 1513730)
Sure you can.
--Ian

I doubt our cost conscious poster wants to spend the kind of funds that it will take to accomplish this.

is this the manifold you have?
how are you connecting the tial ewg to the manifold?
https://cimg1.ibsrv.net/gimg/www.mia...17d3caa614.jpg

Jacobmx5_ 12-06-2018 03:00 PM

I’m planning on welding the waste gate to the manifold ( to the right* side of the flange) if not then to the bottom. I saw Tom do this with the exact same manifold and wastegate a couple years back here on the forum to his yellow sunburst Miata.

ryansmoneypit 12-06-2018 09:45 PM

So your going to weld to the cast manifold? Explain how this is going to work, long term. Hell, 1 month term.

Jacobmx5_ 12-06-2018 11:05 PM

Well Tom did it, seen bunch of people do it right and it works. You have to do it right! welding to cast iron is a bitch, not recommended. Brother had a welded ewg to his sr cast manifold.
Drill/cut your hole
pre heat the hell out of the manifold. acytelene torch, propane whatever you have till you see it slight orange.
Weld and tap the Cooling fusing metal to release pressure so it won’t crack.
finish up nicely and it should last.

borka 12-06-2018 11:17 PM

Well... You just threw "money is tight" out the window.

much easier to buy a standard pre fabbed kraken or FM t25 iwg manifold/dp set and slap a nice 2560 or 2871 turbo.

Good luck, I really hope all this works out for you and won't break the bank.

post pics of progress/finished product to prove us all wrong.

ryansmoneypit 12-07-2018 06:25 AM


Originally Posted by Jacobmx5_ (Post 1513832)
Well Tom did it, seen bunch of people do it right and it works. You have to do it right! welding to cast iron is a bitch not recommended. Brother had a welded ewg to his sr cast manifold.
Drill/cut your whole
pre heat the hell out of the manifold. acytelene torch, propane whatever you have till you see it slight orange.
Weld and tap the Cooling fusing metal to release pressure so it won’t crack.
finish up nicely and it should last.





your actually pretty spot on for the process. It does require a mix of filler though. I've used a twisted pair of wires, one with a high nickel content and the other with a lot of silicon . It's the longevity though. It can't be trusted as a permanent fix.

it's the heat cycle that really works the weldelement, bad.

all if this uncertainty is easily avoided by just plunking down the cash for quality components. Cry once, buy once.

HmoobDude 12-07-2018 01:03 PM


Originally Posted by borka (Post 1513835)
Well... You just threw "money is tight" out the window.

much easier to buy a standard pre fabbed kraken or FM t25 iwg manifold/dp set and slap a nice 2560 or 2871 turbo.

Good luck, I really hope all this works out for you and won't break the bank.

post pics of progress/finished product to prove us all wrong.

+1, you're cutting corners in one area only to make up the difference by having to make modifications elsewhere.

Balto 12-08-2018 08:12 AM


Originally Posted by sixshooter (Post 1513611)
I rode in a shitbox with a hood dump and can tell you that driving it two blocks made my eyes water and I stunk like exhaust all day.

If you cannot afford a piece of exhaust pipe you cannot afford to own and operate a turbo Miata.

You don't have an upgraded clutch on your list in the stock clutch will only handle the stock power of a 1.6.

The 1.6 diffs fail at stock power levels so replacement 1.8 differentials and axles are required.

Since you have a 1.6 you also require a variable throttle position sensor which you will have to wire in or your car will run poorly everytime you stomp on the gas.

There's more but you probably don't want to hear it.

Hell my exhaust was chopped off (by me, needed to get new exhaust and it was in the way during my 6sp swap) UNDERNEATH the car, right beneath the drivers seat and I still couldn't handle the exhaust smell +noise. Having to wear earplugs, not to mention I got pulled over literally every single time I drove the car around town (granted, it was only 3 times).

I only paid 390 from my header all the way to the back exhaust. That included a muffler, o2 bung, and new Flanges on my cat due to the PO being a hack and lopping off the stock flange points. On top of all that, I live in California where everything is more expensive!! Now my car smells great, has a nice(but quiet) exhaust note, and the cops don't even look my way anymore.
​​​

Zeng Hugo 12-18-2020 12:07 AM

ignore all the hater here. i personally have hood exit on my 1.5j supra. I can hear music when cruising on highway. it will make the afr leaner depend on your rpm. most likely fuck up the AFR at idle. hood exit is not lot louder than the straight pipe. Believe me is still quick than some v8 straight pipe since the turbo is a muffler. My hot side is at the passenger side. so when I roll window up I wont smell anything. I drove my with hood exit for 1000 mile no problem. busted knuckle films drove his twin turbo LS hood exit for over 13000 mile roatrip in 3 months, cross country more than 3 times, doesn't seen he has hearing issue. Just do what you like no need to care about what other people say

18psi 12-18-2020 12:10 AM

Bro....you tarded by about 2 years

Zeng Hugo 12-18-2020 12:14 AM

?

Arca_ex 12-18-2020 06:10 AM


Originally Posted by Zeng Hugo (Post 1588931)
?

You replied to a two year old thread, and hood dump exhaust is dumb.

Let this die...

concealer404 12-18-2020 01:14 PM


Originally Posted by Zeng Hugo (Post 1588929)
ignore all the hater here. i personally have hood exit on my 1.5j supra. I can hear music when cruising on highway. it will make the afr leaner depend on your rpm. most likely fuck up the AFR at idle. hood exit is not lot louder than the straight pipe. Believe me is still quick than some v8 straight pipe since the turbo is a muffler. My hot side is at the passenger side. so when I roll window up I wont smell anything. I drove my with hood exit for 1000 mile no problem. busted knuckle films drove his twin turbo LS hood exit for over 13000 mile roatrip in 3 months, cross country more than 3 times, doesn't seen he has hearing issue. Just do what you like no need to care about what other people say


Shut the fuck up.

Scaxx 12-18-2020 01:18 PM


Originally Posted by concealer404 (Post 1588950)
Shut the fuck up.

And get the fuck out

msmola2002 12-18-2020 01:21 PM



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