1984 RX-7 Race Car with BP! (almost a Miata) - Page 17 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-28-2014, 09:47 AM   #321
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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.
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Old 01-28-2014, 09:49 AM   #322
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The boost control solenoid?
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Old 01-28-2014, 09:55 AM   #323
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the boost controller or the wastegate?
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Old 01-28-2014, 11:30 AM   #324
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boost control solenoid, blow off valve, turbo speed sensor
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Old 01-28-2014, 11:39 AM   #325
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boost control solenoid, blow off valve, turbo speed sensor, turboencabulator, IWGA
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Old 01-28-2014, 11:51 AM   #326
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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.
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Old 01-28-2014, 01:09 PM   #327
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Quote:
Originally Posted by bcrx7 View Post
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.
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.
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Old 01-28-2014, 01:20 PM   #328
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Quote:
Originally Posted by ScottyP3821 View Post
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.
This is how every EFR turbo ships.
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Old 01-28-2014, 01:36 PM   #329
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Quote:
Originally Posted by Leafy View Post
This is how every EFR turbo ships.
Ok thanks.
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Old 01-28-2014, 02:23 PM   #330
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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
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Old 01-28-2014, 04:19 PM   #331
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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!



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1984 RX-7 Race Car with BP! (almost a Miata)-compressor.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-turbine.jpg  
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Old 01-28-2014, 04:56 PM   #332
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34 psi eh

you're the man
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Old 01-28-2014, 05:57 PM   #333
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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!)
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Old 04-08-2014, 08:23 PM   #334
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Havent heard anything from this thread in a while. But also. Quattro S1 on board.

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Old 04-08-2014, 08:36 PM   #335
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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.
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Old 04-23-2014, 01:59 PM   #336
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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!



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1984 RX-7 Race Car with BP! (almost a Miata)-img_20140329_184016.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_20140329_184123.jpg  
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Old 04-23-2014, 02:12 PM   #337
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just when we almost forgot about this awesome thread, you update it

loving it, as always
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Old 04-23-2014, 04:04 PM   #338
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Thanks man! I just remembered I need to put in that knock sensor you sent me!
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Old 08-06-2014, 08:03 PM   #339
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sooo its been a few months. did it rape boost yet?
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Old 08-06-2014, 08:10 PM   #340
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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!
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