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

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Old 10-07-2012, 12:05 AM   #121
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Yeah what a pain in the butt to make it work with twin scroll! This better be worth it! haha
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Old 10-07-2012, 12:07 AM   #122
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Pretty sure it will be.
That tube layout and twin scroll is what all the people making a LOT of power are running (on other cars). And when I say a lot I mean more than almost all miatas
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Old 10-07-2012, 12:09 AM   #123
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So you are saying Fae is not running twin scroll? haha
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Old 10-07-2012, 12:11 AM   #124
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Or any kinda scroll....Just his mouth
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Old 10-07-2012, 12:13 AM   #125
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Speaking of that, his thread is burried somewhere. I should bring it alive hah
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Old 10-07-2012, 12:45 AM   #126
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Not sure if this was mentioned before. Is this going to be internally wastegated? There's nothing to be seen for an external. Reasons?
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Old 10-07-2012, 12:47 AM   #127
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yes! BorgWarner EFR 8374 twin scroll! Their internal wastegate is the cats-***! As it is, I will be running a 4" exhaust, so no issues there either! Going with the good old KISS rule! (keep it simple stupid)
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Old 10-07-2012, 01:11 AM   #128
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I don't remember if Fae is running a twin-scroll mani, I think he just has a quick-spool valve.
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Old 10-07-2012, 10:38 PM   #129
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Had a cheap china-charge around that put it on the manifold with one bolt! Manifold is pretty much done. Some welding is still required, but waiting for a smaller TIG torch to arrive! Will start the rest of the exhaust tomorrow.











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1984 RX-7 Race Car with BP! (almost a Miata)-img_0337.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0338.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0339.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0340.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0341.jpg  

1984 RX-7 Race Car with BP! (almost a Miata)-img_0342.jpg  
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Old 10-08-2012, 04:29 AM   #130
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What are great looking project. I love the updates.

What pipe are you using for the manifold? Also, do you have any plans for bracing or a crane?
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Old 10-08-2012, 02:48 PM   #131
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Thank you!
It is schedule 10 stainless. Yes I will have a crane on the T4 flange. Have to figure out where. The EFR turbo is on back-order, so I will figure that out once it gets here to make sure there is enough room!
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Old 10-09-2012, 02:59 AM   #132
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And I have the side pipe figured out!







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1984 RX-7 Race Car with BP! (almost a Miata)-img_0343.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0346.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0348.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0353.jpg  
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Old 10-09-2012, 11:05 AM   #133
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Isn't it going to get crazy hot inside with that thing?
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Old 10-09-2012, 12:09 PM   #134
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Well there is going to be a box made around the muffler with gold shielding. We have done it before and it works well!
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Old 10-09-2012, 01:19 PM   #135
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what about the CAS and coolant outlet?
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Old 10-09-2012, 01:21 PM   #136
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I've made sure there is plenty of room between those and the exhaust. I will most likely wrap the exhaust there too as the flex will go there!
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Old 10-09-2012, 01:51 PM   #137
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What do you guy recommend as far as a crane setup? I have seen a few, but what are your experience?
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Old 10-09-2012, 03:42 PM   #138
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I thought it was against many racing organizations' rules to have exhaust components inside the driver's compartment at all. I am certain it was in ChumpCar (who copies others' safety guidelines) and I think it is in NASA but I haven't looked yet. I won't bother to look through 1800 pages of SCCA rules.

Just a heads up, that's all.
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Old 10-09-2012, 03:52 PM   #139
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It's not in the driver's compartment. It will have a box around it and separated! We have done this before on multiple cars!

Last edited by bcrx7; 10-09-2012 at 04:13 PM.
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Old 10-12-2012, 02:51 AM   #140
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Well the exhaust is all done and welded. Only piece required will be an elbow from the turbo to the flex when the turbo shows up!









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1984 RX-7 Race Car with BP! (almost a Miata)-img_0363.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0364.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0366.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0367.jpg   1984 RX-7 Race Car with BP! (almost a Miata)-img_0369.jpg  

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