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Search: Posts Made By: spdracerut
Showing results 1 to 25 of 493
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May 30, 2019, 09:04 PM
Replies: 130
Views: 8,564
Posted By spdracerut

Rapid decompression of air will make it very...

Rapid decompression of air will make it very cold. If you're a cyclist and have used the CO2 tire inflators, they get very cold as you let out the pressure quickly from the CO2 cartridge and into the...
May 8, 2019, 11:22 PM
Replies: 21
Views: 1,509
Posted By spdracerut

The Garrett v-band single scroll and T3/v-band...

The Garrett v-band single scroll and T3/v-band twin-scroll housings have the same A/Rs, but the twin-scroll housings have more cross-sectional area at a larger radius. So bigger A over larger R,...
May 7, 2019, 09:03 AM
Replies: 21
Views: 1,509
Posted By spdracerut

If you go down the path of a single scroll,...

If you go down the path of a single scroll, v-band setup, check out RS Motors in Minnesota. Their kit is based around the Garrett reverse rotation turbos (allows for a better flowing manifold due to...
Mar 27, 2019, 09:24 PM
Replies: 185
Views: 21,337
Posted By spdracerut

Time for a Hondata Flashpro

Time for a Hondata Flashpro
Feb 25, 2019, 10:01 PM
Replies: 6
Views: 629
Posted By spdracerut

$100 for a garage spot actually seems cheap. I...

$100 for a garage spot actually seems cheap. I looked up some standard track days at COTA, $575-$600 for a single day, $1000 for 2-days (ChinTrackDays). So $1500 seems about right for a 2-day...
Feb 25, 2019, 02:13 PM
Replies: 6
Views: 629
Posted By spdracerut

Oh, I listened to James Houghton's interview......

Oh, I listened to James Houghton's interview... definitely mega $$$ for the oil spill. It is a FIA track with the first Indycar race coming up next month. The surface has to be pristine.
Feb 25, 2019, 10:48 AM
Replies: 6
Views: 629
Posted By spdracerut

A few cars from 2019 Super Lap at COTA

Tons of Subies..... one Evo. What happened to all the Evo time attack cars? Anyway, pretty amazing amateur-built cars are lapping COTA at a similar pace to full blown race cars.
...
Forum: Motor Sports
Feb 25, 2019, 10:08 AM
Replies: 7
Views: 605
Posted By spdracerut

Remember, the mass factor is to the gear ratio...

Remember, the mass factor is to the gear ratio SQUARED. The wheels are 7.6kg each. As noted in the article, many assumptions had to be made on inertia calcs. So while not accurate enough to say the...
Forum: Motor Sports
Feb 25, 2019, 09:58 AM
Replies: 7
Views: 605
Posted By spdracerut

Actually, the tires were assumed as a hoop, and...

Actually, the tires were assumed as a hoop, and the wheels a hoop and disk. While not completely accurate (3d model with calculated inertia values would be accurate), it's close enough for ball park...
Feb 25, 2019, 09:09 AM
Replies: 15
Views: 1,760
Posted By spdracerut

I don't think the issue actually is with people...

I don't think the issue actually is with people and newer cars. It's people living pay check to pay check in jobs with little to no advancement opportunity. Because public transportation in the US...
Feb 21, 2019, 03:50 PM
Replies: 15
Views: 1,760
Posted By spdracerut

Two years ago: https://youtu.be/4U2eDJnwz_s

Two years ago:
https://youtu.be/4U2eDJnwz_s
Forum: Motor Sports
Feb 12, 2019, 09:17 AM
Replies: 7
Views: 605
Posted By spdracerut

Calcs on rotational inertia and effective mass

Figured the track day crowd would find this info interesting. The flywheel accounts for a lot of the effective mass. ...
Forum: Motor Sports
Feb 12, 2019, 09:07 AM
Replies: 167
Views: 14,031
Posted By spdracerut

If I did my math right, the 46mm restrictor...

If I did my math right, the 46mm restrictor limits you to around 52-53lbs/min mass airflow. That is off the map on the G25-550, and lands you in the 76%-77% compressor efficiency island on the...
Feb 12, 2019, 08:47 AM
Replies: 55
Views: 4,705
Posted By spdracerut

Meh.... stuffing big turbos in places that...

Meh.... stuffing big turbos in places that weren't designed for it is always a compromise in packaging. I would wrap that downpipe and put reflective insulation around that line that's running near...
Feb 12, 2019, 08:38 AM
Replies: 1
Views: 525
Posted By spdracerut

For sure you need the bigger 0.94 A/R hotside....

For sure you need the bigger 0.94 A/R hotside. The bigger 4" inlet on the optional compressor housing should free up a little power too.
Jan 15, 2019, 08:07 PM
Replies: 54
Views: 3,733
Posted By spdracerut

Check the temps after going down the Mulsanne...

Check the temps after going down the Mulsanne straight. Spend enough time at WOT, and the heat will conduct from the turbine housing to the center housing. And yes, Garrett is a huge proponent of...
Jan 15, 2019, 08:00 PM
Replies: 54
Views: 3,733
Posted By spdracerut

Actually, the Garrett Motorsports turbos are not....

Actually, the Garrett Motorsports turbos are not. I'm talking WRC, Rally-X, FIA, SuperGT, DTM, LMP, Ferrari F1 turbos. The stuff you can buy only if you're a pro motorsports team.

For example,...
Jan 15, 2019, 05:53 PM
Replies: 54
Views: 3,733
Posted By spdracerut

Aluminum is also MUCH weaker at high...

Aluminum is also MUCH weaker at high temperatures. Exhaust gas temps and therefore the turbine housing are in that 950degC+ range. The center housing is in direct conduction heat transfer contact...
Jan 15, 2019, 05:29 PM
Replies: 11
Views: 998
Posted By spdracerut

I was think Hyundai Veloster front end, but it is...

I was think Hyundai Veloster front end, but it is closer to the Audi. I think it's really lame a supercharger only increased the power to 700hp from the NA 526hp.
Jan 15, 2019, 09:03 AM
Replies: 54
Views: 3,733
Posted By spdracerut

What's wrong with a cast iron center housing?...

What's wrong with a cast iron center housing? It's like 99.99999999% of turbo center housings. Even some of the Garrett Motorsports turbos use cast iron where the race series (FIA touring car, Global...
Jan 15, 2019, 08:57 AM
Replies: 54
Views: 3,733
Posted By spdracerut

Correct. ATP did make them like 12+ years ago.

Correct. ATP did make them like 12+ years ago.
Jan 15, 2019, 08:51 AM
Replies: 4
Views: 709
Posted By spdracerut

I've been lurking in the Porsche scene for a...

I've been lurking in the Porsche scene for a couple years now. The 991.2 generation 911 Carrera T with Rear Wheel Steers seems to be the drivers choice. Some even preferring it to their GT3s. And...
Jan 3, 2019, 05:38 PM
Replies: 4
Views: 1,594
Posted By spdracerut

Looks good! Cams would be another good power...

Looks good! Cams would be another good power adder. Like another 30whp.
Dec 20, 2018, 04:48 PM
Replies: 4
Views: 685
Posted By spdracerut

Interesting turbo technology on Mazda CX-5

https://photos.smugmug.com/MotoIQ/Tech/MazdaCX5/i-ftZFX5K/1/d56e47aa/X2/engflapclosed-X2.jpg

https://motoiq.com/2019-mazda-cx-5-turbo-winter-test-drive-and-tech-dive/3/
Dec 7, 2018, 10:30 AM
Replies: 0
Views: 457
Posted By spdracerut

GT2RS Clubsport and 992 Carrera turbo setup pics

Definitely a different challenge placing everything with the engine at the back of the car:
https://motoiq.com/la-auto-show-2018-nerds-eye-view-porsche/

That GT2RS Clubsport is badass. Should be...
Showing results 1 to 25 of 493
 


 
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