Seeing this dissatisfaction and looking for other throttle body bolt patterns last night I noticed that the sr20det and rb20 throttle bodies have the same 60mm square bolt pattern as the 1.8. Did anyone ever test to see if the throttle shafts on these break?

I'm ready to fit the TB guys but I gotta be honest I'm a little confused by the 2 parts pictured at the front. The elliptical part I guess forms the tps housing and the rotor bit has slipped over the 'blade' for the tps but what is the odd shaped gasket for? Confused :/

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Is there a gasket on top and on the bottom of that idle valve adapter plate thing? Mine was for an NB so the idle valve adapter is set up a bit differently so I'm probably no help, sorry. I know the NB one goes together like a puzzle designed by the Mad Hatter with no instructions.

You're right: I'm dumb

Haha

Thanks buddy. I'll put it down to a long day :D

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The inlet swap has really been awful but I'm no mechanic. Now I can see light at the end of the tunnel what gains do you think I'll see if any?

I'm sure someone has done before and after but I can't find it at the moment. For us, TB is more about reliability than any serious gains. A $325 throttle body is cheap insurance to protect a $2000+ built motor. These engines tend to make more power when they are not trying to compress fragments of the throttle shaft or the butterfly screws ;)

Yerp I can agree with that. If I see a couple of hp at the top I'll be happy. It's green and shiny. What more can you ask for ?? :D

Ok, now go make a intro thread: Meet and Greet - Miata Turbo Forum -Boost cars, acquire cats.

Tell us about your car, your self, your mechanical abilities, your cat, your goals, etc. We tend to respond well to visual stimulus so post lots of pics.

...and follow it up with a build thread: Build Threads - Miata Turbo Forum -Boost cars, acquire cats.

Again with the pics, everyone loves pics. :bigtu:

Yes mate sorry. I'll probably need an hour in front of a desktop so probably tomorrow at work. I'll try to keep it concise (ish) with lots of pics :D

Andy

you are making me paranoid

I just came across this recent oopsie on my UK forum on a 300whp 1.6

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Ugh, you guys. I don't want to pull my manifold yet lol.

FWIW he has blobbed some epoxy over the screw heads so if they do fail there is less chance of them being munched.

Seems like a sensible compromise!

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better off pulling the throttle body and hitting the back side of the threads with a chisel

The epoxy is kind of a band-aid. When I worked with a certain race team that fielded 4 Miatas in a certain endurance race, 3 of the engines had Skunk2 TBs and one had an epoxied stocker. I'll let you guess which car went out on a mechanical and what the root cause of that mechanical might have been.

Hell, if you want more evidence, you need look no further than here: https://www.miataturbo.net/prefabbed...e-wheel-81058/ and the title of his new build thread is... https://www.miataturbo.net/build-thr...rebuild-81161/

Lets pull it off, and I will port match yours as I did mine, I can also get you a TB from the same place I got mine so we can protect that motor!

I'm also a not so proud member of the throttle body ingestion club. Its typically not the screw backing out that is initial problem, its the throttle shaft cracking at the screw hole. Then the screw comes free. Mine was expoy'd to the shaft and still made it into the intake manifold and #3 cylinder. I was lucky that it was a through-and-through and no major damage was done. If you don't want to pull your intake manifold, just install the Skunk2 TB without porting.

Don't you have a squaretop on that BP6D? All you have to do is pull the top half of the manifold. Quit yer bitchin' it'll take you like 15min ;)

Besides, you don't actually have to port it at all. Some of us just have that level of OCD.

But gasket?

So order a gasket. http://miataroadster.com/mazda/mazda.../i-464139.aspx