Mine makes funky noises from the bottom too. But I always assumed it was the same as the injector noise I hear from the top.

I don't ever remember listening to the motor from under the car before. The noises are odd and perplexing. I have heard nothing through a stethoscope that I would qualify as a knock...just several spaces where a "tick" is audible. I stuck the stethoscope on the truck's, Jenny's car and the M3's oil pans. All had similar noises. I have a few other things I am going to check in the morning. I worked on this thing till 3:00am...then was too stressed to sleep...and was at work at 7:45. It's been a REALLY long day.

I'm guessing you arent doing the pro finally then. When are you getting to lincoln? I'm getting there sundayish. If you dont have it sorted by then I'm sure the two of us can figure it out, or break out into fistacuffs.

I'm not sure at this point. I'm going to tinker with it some more today and see what I can find out. Thanks for the offer of help. If I can't get it figured out I'm not going to bring it. I'll just be in E Stock showing everyone how bad of a driver I REALLY am.

Exhaust leak can be found with a hose better than stethoscope. I quess removing the tip from stethoscope makes it a hose, but extra vacuum works well too. If you cannot find anything and the mechanical sounds are not there, bring it to the event and run it. If you haven't heard it before from top, chances are that it has been there all along.

I've got nothing on the noise, but just wanted to say good luck to you and Leafy.

You can hear the throwout bearing, the trans input shaft rattling or ticking, the clutch springs, the oil pump gears, the oil pump flats against the crank flats, piston slap (I've got that one), valvetrain noise, and who knows what else. Just run it.

My head was just rebuilt and lash set, and I still have valvetrain noise. I just accept it as part of the car. Kinda wish I only had the exhaust tone though.

Here are a few videos of my car at Nationals. I was still gun shy and scared to death the motor was going to fly apart....my codriver had not taken an autocross run since Nationals last year. He was still able to pull off a 6th place finish and highest finishing SSM Miata two years in a row.

Got to meet Leafy. He's a much cooler guy in person :) His car is pretty damn fast. Once he get's it sorted out we are going to have some fast ass Miatas in SSM.

West Course Race Keeper:

East Course Race Keeper:

East Go Pro From the front:

East Go Pro from the rear:

East Go pro from the Rear +1:

I just compared our West videos side by side. How did I beat you again? I still don't believe it. You're faster everywhere but corner entry where I could just turn in with more speed and keep it though the turn but you were on the loud pedal sooner. Assuming both of our speed readouts on the video are mostly accurate. I don't even want to compare our east runs because all of mine were heinously abysmal.

More distance? :giles:

So I have been VERY lazy with the car since Nationals. I actually just got it off the trailer a couple weeks ago.

So apparently I had the supercharger on the wrong side of the motor....who knew?

https://www.miataturbo.net/attachmen...ine=1390260157

https://www.miataturbo.net/attachmen...ine=1390260157

As I was test fitting the new intake manifold....I, for a split second, thought about pissing you all off REALLY hard by twin charging the car.........with two superchargers.

https://www.miataturbo.net/attachmen...ine=1390260157

And I started to test fit the new Radiator and Intercooler

https://www.miataturbo.net/attachmen...ine=1390260157

https://www.miataturbo.net/attachmen...ine=1390260157

https://www.miataturbo.net/attachmen...ine=1390260157

That's really as far as I have made it. I have a few more things to do before the Dixie National Tour.....I hope I'm able to get it all done.

that bad boy looks MEAN

the rad/ic setup is....interesting
I remember we had discussions on whether a setup like that is effective...years ago.

Looking forward to results.

and I doubt anyone would be pissed off if you actually twin charged it lol. you seem to know what you're doing, and would probably actually pull it off

I think it would be effective. just need a divider down the middle to duct the air all the way to the bumper cover.

So your going to a hot side 'charger with a standard style intake manifold?

Love it.

other way around.

effective for an autocross car...I'm sure it will be great

Effective for a road course...I dunno, probably not enough radiator

It's enough radiator for a Honder making more HP without ducting. I imagine the rad would be fine. I would worry more about the effectiveness of the intercooler.

this means literally nothing.
you should read up on the discussions and testing some here have done proving this theory is garbage on a miata.

Don't be a chode. I used a relevant anecdote to point out that there's a likelihood that this would work fine.

Heat transfer is heat transfer. Unless some other mitigating factor is involved there is absolutely no difference between mounting this rad on a Honda and mounting it on a Miata. There is only the required quantity of heat energy to be removed, and whether or not there is sufficient heat exchanger effectiveness, water flow, and air flow. There is no magical quantity that makes a Miata require more heat exchanger than a Civic.

You're the chode. There is nothing in common between an all aluminum modern block vs an old closed deck cast iron block.

I personally rebuilt a 96 miata engine that overheated with an oversized honda radiator on it, and it ran fine for years before that, and literally the only thing that caused it to overheat and warp the head and blow the hg was the honda radiator. This was a street car too.

But please, tell me more about all the miata's with honda radiators that you've run? You ARE speaking from experience obviously, to be this confident........right?