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Track car build, NASA ST5, SCCA STL

Old 01-30-2018, 07:44 AM
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Track car build, NASA ST5, SCCA STL

After looking at several different rwd platform, from E36 to BRZ, I decided to go with the RX8. Superior double wishbone suspension and chassis are cheap to find. My initial plan was to do k24 swap, but after doing some research, it seems that it would require modding the subframe which is not allowed in the rules. So I'm going to build the renesis and run it for now. The K24 would make enough hp for me to run ST4 and also detune to run ST5. But with the renesis, it won't make enough to max out the ST4 class.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20171218_204821387_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180107_101737707%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171021_182302808.jpg  

Last edited by trackjunkie; 01-30-2018 at 11:58 AM.
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Old 01-30-2018, 07:53 AM
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First attempt at removing the tar with a blow torch. Did the center section first. Conclusion is it's too smelly and smoky if you burn the tar. And took too much effort. Then I tried the dry ice method. Much easier and less mess to clean up afterwards. Dry ice was about $3 per lb and I used about 15 lbs, plus 3 bottles of alcohol. Total tar removed was around 23 lbs
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20171222_222110191_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171222_222527210_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171223_121712072_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171223_123810493_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171223_154428260_hdr%7E01.jpg  

Track car build, NASA ST5, SCCA STL-img_20171223_151620157_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171223_151604550_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171223_155100806_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171222_210901224_hdr%7E01.jpg  

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Old 01-30-2018, 08:09 AM
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Was debating on whether to keep the HVAC unit or not since I wanted to drive the car street legal this year for some test and tune. But the cage builder convinced me to remove it. Also since I wasn't going to keep the radio, I would have to figure out a way to control the HVAC. I'm going to use a small electric ceramic heater for the defroster. Total weight of the HVAC was around 20 lbs.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20180107_112516473_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180108_184017122%7E01.jpg  
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Old 01-30-2018, 08:23 AM
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Cage is done and painted. Trimming the dash to fit back in was pain. It was pretty heavy and after all the trimming, i probably took about a third of the weight off.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20180121_103301332_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180121_123751190_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180122_131523367_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180128_094805885_ll%7E01.jpg  

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Old 01-30-2018, 08:35 AM
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Some goodies going in the car. Sparco circuit seat. OS Giken 1.5 way LSD and 5.125 final drive.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20171221_170053690_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20171221_173953830_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180129_174522163_ll%7E01.jpg  
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Old 01-30-2018, 11:36 AM
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Looking good. That seat mount certainly is robust. Did you make provisions for the crotch belts to attach somewhere?
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Old 01-30-2018, 11:50 AM
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the anti sub slot on the seat is right above the front of the seat base. i think i can mount the i-bolt just in front of the base or just a hole in the base to mount the i-bolt. the seat bottom is about 1" above the base at the front and about 1/4" above the seat base in the back. so not much room.
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Old 01-30-2018, 12:16 PM
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I like the heater idea. Wish I had bought and stored away a 5.125 R&P back when they were readily available.
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Old 01-30-2018, 07:15 PM
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You don't want it too far forward. Look at these guidelines.

https://www.schrothracing.com/docs/C...structions.pdf
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Old 01-30-2018, 10:21 PM
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Originally Posted by Adax View Post
You don't want it too far forward. Look at these guidelines.

https://www.schrothracing.com/docs/C...structions.pdf
yeah that's the guideline i used for my previous track car also
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Old 01-31-2018, 09:05 AM
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Originally Posted by TeamRX8 View Post
I like the heater idea. Wish I had bought and stored away a 5.125 R&P back when they were readily available.
I have a spare.
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Old 01-31-2018, 09:10 AM
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Originally Posted by trackjunkie View Post
My initial plan was to do k24 swap, but after doing some research, it seems that it would require modding the subframe which is not allowed in the rules.
I've talked to my local TT director about this extensively, because I was told the same thing. What the TT director told me was that the critical thing NASA doesn't want changed is the suspension attachment points. He said changing the center section of the front subframe is fine.

For instance, I asked him if I could bolt or weld new mounts for an engine swap, and he said that was absolutely okay. He said a local racer had even been given the okay to make his subframe into three distinct pieces so it was easier for him to remove the engine.
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Old 01-31-2018, 10:11 AM
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Originally Posted by Mr. Pockets View Post
I have a spare.
Oh there out there for sure, but the obvious is if I have to ask for a price then I probably can't afford it ...
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Old 01-31-2018, 11:41 AM
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Originally Posted by TeamRX8 View Post
Oh there out there for sure, but the obvious is if I have to ask for a price then I probably can't afford it ...
Are they worth that much? didn't pay a lot for the spare I have. I was going to put it in my grey car, but then... My new car already has one in it, so the one I bought is a spare.
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Old 01-31-2018, 04:23 PM
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I was mostly just joking

Haven't seen any new ones for sale in a while, just used ones that were at the same price I recalled them selling new at Motorsports for previously

But shoot me a price when you can
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Old 02-01-2018, 07:40 AM
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Originally Posted by Mr. Pockets View Post
I've talked to my local TT director about this extensively, because I was told the same thing. What the TT director told me was that the critical thing NASA doesn't want changed is the suspension attachment points. He said changing the center section of the front subframe is fine.

For instance, I asked him if I could bolt or weld new mounts for an engine swap, and he said that was absolutely okay. He said a local racer had even been given the okay to make his subframe into three distinct pieces so it was easier for him to remove the engine.
i would have to check with the national TT director to confirm that modding the subframe is allowed as long as it doesn't change the suspension pickup points. it might be ok for one local region, but i run in three different nasa region.

if the concern was only about the suspension mounting points, then they wouldn't have include not allowing mod to the firewall and trans tunnel for engine swap.

Last edited by trackjunkie; 02-01-2018 at 08:09 AM.
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Old 02-01-2018, 10:39 AM
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I think it's possible I'm incorrectly applying what our regional TT director told me. When I asked him, he may have been speaking specifically about the lettered TT classes, not the numbered ones. I'll ask him about it.

Nick
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Old 02-26-2018, 01:48 PM
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Brought the car to CBRD last week to start working on suspension and engine stuff.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20180219_135526424_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180219_132422922_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180224_122825797%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180224_135552900_ll%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180224_105127178_hdr%7E01.jpg  

Track car build, NASA ST5, SCCA STL-img_20180224_145746154%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180224_161131202_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180225_212258076_hdr%7E01.jpg  
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Old 02-28-2018, 05:37 PM
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Subbed so I can learn how to mod my car like a bauce. 😉

What are you planning for ballast?
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Old 03-01-2018, 08:44 AM
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Originally Posted by trackjunkie View Post
Brought the car to CBRD last week to start working on suspension and engine stuff.
Your car is like a clone of mine. :P Red, Ohlins DFV, Sohn, same tanks, same intake...

Anyway, I'll tell you what I found with that oil tank. Because it's a gravity feed, of course, it has gaps built into the cap's gasket to allow air in. But that means it also lets oil out. If it's full, it can easily slosh enough out to get on the exhaust and smoke.

I don't have a great solution yet. I sealed mine up better and drilled a small hole in the center of the cap. I plan to glue some foam in the inside of the cap to keep the oil from sloshing out.
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Old 03-01-2018, 10:20 AM
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I've been wondering about cannibalizing a computer hard drive for the little breather filter they put near the breather hole. Drill the smallest hole possible and then use a bead of superglue around the hole to secure the filter.

Air Circulation and Air Filtration
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Old 03-02-2018, 08:39 AM
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Originally Posted by Mr. Pockets View Post
Your car is like a clone of mine. :P Red, Ohlins DFV, Sohn, same tanks, same intake...

Anyway, I'll tell you what I found with that oil tank. Because it's a gravity feed, of course, it has gaps built into the cap's gasket to allow air in. But that means it also lets oil out. If it's full, it can easily slosh enough out to get on the exhaust and smoke.

I don't have a great solution yet. I sealed mine up better and drilled a small hole in the center of the cap. I plan to glue some foam in the inside of the cap to keep the oil from sloshing out.
thanks for the heads up on that.

ill probably just drill a hole on the cap and put a vacuum line filter on it. and seal up the seal on the cap.

https://us.vwr.com/store/product/361...n-line-filters

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Old 03-02-2018, 08:45 AM
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Originally Posted by hufflepuff View Post
Subbed so I can learn how to mod my car like a bauce. 😉

What are you planning for ballast?
i can't put the car on scales yet since i'm still working on the rear top hat for the ohlins. then figure out how much ballast i would need. i'm thinking i'll probably need 150-200 lbs of ballast. i was going to make a plate and mount it to the passenger seat mounting holes, then mount several different size weight to it so i can removed or add different combination of weights.
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Old 03-02-2018, 01:24 PM
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Got a new Odyssey battery from sponsorship. Will install it inside the car on passenger side.

Was going to do a custom exhaust from header back, but I saw that PowerXS had a 3" test pipe that was pretty cheap. I couldn't get pipes and flanges for less than what cost. So we are going to do custom cat back exhaust.
​​​​​​
got the antisub eyebolt mounted. Was worried that it might hit the frame rail, but the alignment came out pretty good.

Had to cut the front camber bolt on driver side. The passenger side came out with air hammer but driver side was stuck pretty good. Tried every for last couple days and finally decided to cut it off. And press the bolt out after the control arm is out.
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20180228_190806120_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180301_144914264_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180301_151147777_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180301_170050658_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180301_170740360%7E01.jpg  

Track car build, NASA ST5, SCCA STL-img_20180301_194458543_hdr%7E01.jpg  
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Old 03-02-2018, 01:34 PM
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Did the front wheel studs. I didn't remove the hub but you might as well, it just 4 bolts to remove the wheel bearing and hub and press out studs. The rear will have to press out the hub for sire, so I'm going to replace the wheel bearings also while the hub has to be pressed out .
Attached Thumbnails Track car build, NASA ST5, SCCA STL-img_20180225_115727834_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180225_122653349_hdr%7E01.jpg   Track car build, NASA ST5, SCCA STL-img_20180225_115902252_hdr%7E01.jpg  
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