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Forged Performance: Live Report from the Bonneville Salt Flats Speed Attempt**Live

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Old Jul 17, 2007 | 05:15 AM
  #81  
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lol - don't think anyone has measured the coefficient of rolling friction in the salt flats.

Hey, I did find a nice link that also takes tire inflation pressure into account (I didn't): http://www.bgsoflex.com/aero.html

The frontal square feet of a 350z is 25.55 sq ft, based on height and width (not correcting for ground clearance).

That calculator indicates 627 hp required at sea level (30 in Hg) - not sure why there's that much of a difference in the calculations...
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Old Jul 17, 2007 | 06:33 AM
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Originally Posted by rcdash
lol - don't think anyone has measured the coefficient of rolling friction in the salt flats.

Hey, I did find a nice link that also takes tire inflation pressure into account (I didn't): http://www.bgsoflex.com/aero.html

The frontal square feet of a 350z is 25.55 sq ft, based on height and width (not correcting for ground clearance).

That calculator indicates 627 hp required at sea level (30 in Hg) - not sure why there's that much of a difference in the calculations...
I am waiting for a connecting flight in Denver, so I thought I would post again.

Raj, thanks for doing the calculation. I agree with your posts. I think the best shot at hitting 200mph, would be with a standard coupe, without any type of aero devices, and some stock sized wheels. The weight, body kit, massive tires, untested aero devices, and the convertable, are all working against us.

I do think a power buffer of some sort...maybe 50-75whp would be needed to actually accelerate the car steadily to 200mph within the 3 mile limit. Running the engine at WOT for 2-3 mins puts tremendous stress and heat soak into the engine, so the idea is to get to terminal velocity as quickly as possible, I would think. On the dyno, the engine is producing about 580whp when corrected to STD Atmo. In 90-100F weather, the engine is physically putting down about 10-12% less power, so I guessing that on this day, we were making about 522whp.

The Speed Week officials, confirmed that the BEST time to run the salt flats is at dawn, when the surface and air are cool, and the wind is zero.

It was really a lot of fun.

Last edited by Sharif@Forged; Jul 17, 2007 at 06:46 AM.
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Old Jul 17, 2007 | 06:42 AM
  #83  
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congrats brent and sharif! sounds like an awesome time and im sure you'll keep at it til you break 200.
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Old Jul 17, 2007 | 06:45 AM
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Originally Posted by w0ady
congrats brent and sharif! sounds like an awesome time and im sure you'll keep at it til you break 200.
Yeah, Brent is already talking about doing it again next year. Sounds like a good goal!
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Old Jul 17, 2007 | 07:05 AM
  #85  
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Originally Posted by Sharif@Forged
Yeah, Brent is already talking about doing it again next year. Sounds like a good goal!
So what will you guys change on the car for next year??



Sounds like it was alot of fun. I always wanted to go to the moon


Later
TOdd
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Old Jul 17, 2007 | 07:08 AM
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Sharif do they only do this once a year?
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Old Jul 17, 2007 | 07:13 AM
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Sharif do they only do this once a year?
This was the first time the AKA Rally has started their event at the Salt Flats, so my hope is they will do it again next year.

As far as changes, since its unlikely that Brent will trim weight from his car, or remove/modify his body kit and wheel package, we'll mostly do it the old fashioned way: More Power!

As long as I dont pass out from sleep deprivation, I will get the vid upload late today/tonight
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Old Jul 17, 2007 | 07:17 AM
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Originally Posted by Sharif@Forged
This was the first time the AKA Rally has started their event at the Salt Flats, so my hope is they will do it again next year.

As far as changes, since its unlikely that Brent will trim weight from his car, or remove/modify his body kit and wheel package, we'll mostly do it the old fashioned way: More Power!

As long as I dont pass out from sleep deprivation, I will get the vid upload late today/tonight
Brent will probably have to go with a different fuel pump setup then huh?
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Old Jul 17, 2007 | 07:55 AM
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Top Secret Hit 211mph in their v8 g35 with 720 hp.

Base: Nissan Skyline (CV35)
Engine: VK45 V8 Twin Turbo SPL
Drivetrain: 6speed Getrag, ORC, RWD
Output: 720ps /7000rpm
Notes:
TAS 05 - Best Tuned Car
Max Power 05 - Best Tuned Car
341km/h Autobahn Attack
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Old Jul 17, 2007 | 08:16 AM
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insane..i have been out of the loop, this my first time hearing about this endeavor...you guys are crazy!
glad you are all safe

-TODD
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Old Jul 17, 2007 | 09:41 AM
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I have always been a fan of fast convertibles! there just something really cool about them. It made me think about this convertible and it had twin turbos too...........it ran 180s+..........in the 1/4 mile over 10 years ago!

http://www.youtube.com/watch?v=gq0n-yFVYdg
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Old Jul 17, 2007 | 10:29 AM
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Originally Posted by Sharif@Forged
I think the best shot at hitting 200mph, would be with a standard coupe, without any type of aero devices, and some stock sized wheels. The weight, body kit, massive tires, untested aero devices, and the convertable, are all working against us.
dunno if you want to go completely stock -- the car feels planted at 155mph, but as you get over 170, it feels a little fuzzy (even w/ the track aero pkg)

i'll be glad to test out a couple theories w/ my car -- need to get the TT's on it first -- but i won't be back for at least a year
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Old Jul 17, 2007 | 11:34 AM
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Originally Posted by 03BrickyardZ
The weight isn't whats holding him back... It's drag.

Theoretically, you can figure out how much power you need to go a certain speed by a formula...

Power = velocity^2 * drag coefficient * frontal surface area * density of the air.

Isn't Brent's car a convertible? Drag is probably killing the 200 mph goal.
+ 1 on that. It seems that Sharif (& company) have hit an aerodynamic wall. More power will not help you much in this case but a good aero kit will do wonders. IIRC, there was a comparison between a Corvette & a Viper (both stock) where the Corvette was beating the Viper's at higher speed/acceleration due to the Corvette's aerodynamic properties.
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Old Jul 17, 2007 | 12:12 PM
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salt flats are on my list of things to do !


YOU GUY"S ARE SO LUCKY. Have a nice flight back hope ya don't get delayed, i heard som crazy thunderstorms are going to be poping up.

Can't wait for the vid!

Cheers

Kevin
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Old Jul 17, 2007 | 01:27 PM
  #95  
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I am finally back at the shop. I checked with Brent, and they are on the road to their next stop, which is Billings, Montana, so he wont be posting for a while.

Vid should be up shortly...stay tuned.
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Old Jul 17, 2007 | 01:28 PM
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Originally Posted by Sharif@Forged
I am finally back at the shop. I checked with Brent, and they are on the road to their next stop, which is Billings, Montana, so he wont be posting for a while.

Vid should be up shortly...stay tuned.
Glad your back safely. Can't wait to see the VID!!!!
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Old Jul 17, 2007 | 01:37 PM
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Great Job guys!
That must have been fun.
Now get my car done!
Hey Bert you up for nexts years AKA???
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Old Jul 17, 2007 | 02:19 PM
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Originally Posted by Machupo
dunno if you want to go completely stock -- the car feels planted at 155mph, but as you get over 170, it feels a little fuzzy (even w/ the track aero pkg)

i'll be glad to test out a couple theories w/ my car -- need to get the TT's on it first -- but i won't be back for at least a year
How are you doing over 160mph in a stock track model Z????
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Old Jul 17, 2007 | 02:34 PM
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I did that speed on a toll road the other night. Only one on the road, except for the bugs. Man those things splat at that speed!

Cheers

Kevin


O and almost got the cash together to come see ya Sharif.
GLAD YOUR BACK SAFE!!!
Now let's see the VID!!!!
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Old Jul 17, 2007 | 07:38 PM
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Any word on the Vid! I can't wait to see this.
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