ScottyP3821

iTrader: (2)

Sorry if this has already been answered. What is the black sensor on the turbo compressor? It looks like that Mitsubishi sensor the stock miata uses for hot restarts.

Leafy

iTrader: (1)

The boost control solenoid?

Braineack

iTrader: (62)

the boost controller or the wastegate?

soviet

iTrader: (10)

boost control solenoid, blow off valve, turbo speed sensor

Leafy

iTrader: (1)

boost control solenoid, blow off valve, turbo speed sensor, turboencabulator, IWGA

bcrx7

iTrader: (5)

As everyone mentioned looking at it from the top clockwise: boost control valve (black hoses), blowoff valve (blue hose) and the one on the bottom is the speed sensor showing the turbine speed which will come handy on the dyno to see where the speed is sitting and if it is stalling under power.

ScottyP3821

iTrader: (2)

Ahh nice. Are you worried about compressor heat melting it at all? The one I have is made out of plastic unless yours is different

EDIT seeing as its directly on the compressor. I guess it would be ok with some sort of barrier between it and the compressor.

Leafy

iTrader: (1)

This is how every EFR turbo ships.

ScottyP3821

iTrader: (2)

Ok thanks.

bcrx7

iTrader: (5)

The compressor doesn't (well shouldn't) get any hotter than 200F, and that doesn't melt that sensor. If that sensors starts melting, there are more serious issues happening than the sensor

bcrx7

iTrader: (5)

Well correction to my earlier comment about the compressor temperature: I have run the calculator both for the air temp as well as the surge curiosity!

The compressor outlet at 7000RPM and 34PSI will be 380F! That is of course the air temp inside and outside should be fairly lower.

As far as surge, I have managed to get a map that will work between 4000rpm to redline.

According to calculations 34PSI is going to be 599hp and 450ft.lb. of torque!

soviet

iTrader: (10)

34 psi eh

you're the man

bcrx7

iTrader: (5)

I would rather run less, but realistically would not happen for 599 (let's call it 600hp). Now not sure how much the calculator takes into account the effect of running high octane/E85 as there can be much added timing which will help VE. It does recommend values for the turbine efficiency to be increased by 10-15% at lower RPM range with twin-scroll but I did stay on the conservative side. It's all on paper (well on a site) but people have achieved much higher numbers from these EFR's than just paper. I mean you got 458whp from a 6758, so a compressor with additional 16mm should do the trick and get me to that 600hp (and that's at crank!)

Leafy

iTrader: (1)

Havent heard anything from this thread in a while. But also. Quattro S1 on board.

bcrx7

iTrader: (5)

Yeah. I've been picking at the interior slowly and started to look at finishing the body work and the flat bottom. But no pictures and a little bit less work since i've been working on another project in the shop. In addition looking at starting a CNC/Machining business with a friend and that is keeping us busy.

bcrx7

iTrader: (5)

Some more pictures and proof that I have been slowly (really freaking slowly) working on it. Been mostly working on a customer's MR-S and semi-tubing the back half of that as well as putting MegaSquirt in a couple of race cars. Fun stuff!

18psi

iTrader: (76)

just when we almost forgot about this awesome thread, you update it

loving it, as always

bcrx7

iTrader: (5)

Thanks man! I just remembered I need to put in that knock sensor you sent me!

shlammed

iTrader: (8)

sooo its been a few months. did it rape boost yet?

bcrx7

iTrader: (5)

Unfortunately it is in storage until we found a new place to work on it. I had some issues with the shop owner (now ex-friend) is the short version

Getting some parts for it now and going to bite the bullet and change the front to double wishbone!