1994 FD 20B build

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Old 09-22-12, 06:13 PM
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Originally Posted by Prometheus
this is a great job, I really like how you were able to get the UIM to clear the strut towers.
Thanks, we welded up a custom sub-frame to keep the 20b at the same height as the 13b
Attached Thumbnails 1994 FD 20B build-img_0555-fileminimizer-.jpg  
Old 10-12-12, 06:13 PM
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Here is a video of the first test drive. What do you think? I have to fix a little exhaust leak on the manifold. Other than that, I thought it was pretty successful.

Old 10-12-12, 06:21 PM
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Here is another

FD3S RX-7 3 Rotor Open Road Test Drive - YouTube
Old 10-20-12, 08:33 PM
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wow, thanks for posting.
i just started learning about 20b, want one more now after seeing this.
Old 10-21-12, 10:12 AM
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Just ran across this thread. Nice job on the build. Noel is the man
Old 10-29-12, 01:49 PM
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more videos please. or, just send me your car, thanks.
Old 10-29-12, 06:09 PM
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Old 10-29-12, 06:11 PM
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Old 10-30-12, 10:44 PM
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I just added the Shine Auto Project Low profile spoiler. I think it looks pretty good.
Attached Thumbnails 1994 FD 20B build-img_0784-fileminimizer-.jpg  
Old 10-30-12, 10:49 PM
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We are just finishing up a few clean up items, then it is off to the dyno for tuning!
Attached Thumbnails 1994 FD 20B build-img_0780-fileminimizer-.jpg  
Old 10-31-12, 08:32 AM
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Originally Posted by mmcal1055
Thanks, we welded up a custom sub-frame to keep the 20b at the same height as the 13b
Did you have to make a custom oil pan to lower the engine? How is the bump steer using that subframe? I currently have the Pettit / Hinson type.
Old 10-31-12, 03:11 PM
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Originally Posted by MSTHTD1
Did you have to make a custom oil pan to lower the engine? How is the bump steer using that subframe? I currently have the Pettit / Hinson type.
They way we approached this was to make the sub-frame wide enough to allow the stock oil pan to drop down. These pics are the best I have to illustrate what we did. Bump steer was not really an issue due to keeping everything pretty close to the stock geometry. I think we needed a longer bump steer length (not much at all). Hope that helps.
Attached Thumbnails 1994 FD 20B build-img_0636-fileminimizer-.jpg   1994 FD 20B build-img_0641-fileminimizer-.jpg  
Old 12-18-12, 03:16 PM
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Dyno Run

RX-7 FD3S 20B Dyno Run - YouTube
Last Dyno Run of the night

Last edited by mmcal1055; 12-18-12 at 03:23 PM.
Old 12-18-12, 03:22 PM
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Dyno Results
Attached Thumbnails 1994 FD 20B build-img_0866-fileminimizer-.jpg  
Old 12-18-12, 04:05 PM
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Nice numbers. Congrats to you and Noel.
Old 12-18-12, 05:15 PM
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act single disk clutch?
Old 12-24-12, 06:16 AM
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Thanks David, however we have to really give thanks to Rohan of Rohtech Motorsports as he is the actual builder/fabricator of the project. I was just more of a "consultant" of the engine build because I had to go up South Carolina on business during the majority of the build. I did make it there for the dyno tune basically monitoring the critical engine paramaters as Rohan tuned it. It made the 521rwhp at 15psi so we belive the motor will be pretty safe.
Old 12-24-12, 12:39 PM
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Old 01-04-13, 07:01 PM
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I just got the Seibon ST hood today. We installed it on the car and I think it looks pretty good. I warmed the engine up and the hood remained cool, but you could really feel the heat coming out from the vent/louvers!
Attached Thumbnails 1994 FD 20B build-img_0926-fileminimizer-.jpg  
Old 04-05-13, 07:53 PM
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Here is a walk around video of the completed engine swap. I think that transformation has been well worth the wait. The power is ridiculous. Thanks to Rohan at Rotech Motorsports in Winter Garden, FL!
Old 05-11-13, 06:19 PM
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Originally Posted by blkkarmafd
nery sweet fd!
I 2nd that.
Old 05-11-13, 06:20 PM
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I've been out of RX7 seen for some time. And now that all of my other projects are getting complete. Looking for FD 20B as next project.
Old 06-13-13, 10:50 PM
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