"Fastest" Forum Member

[wrxgoose]

Originally Posted by Porsche

Heh.

And you're strapped down, too!

Dynos have me scratching my head, Goose. Can you pull redline in 6th on a dyno? If not, why not? There's no wind resistance to overcome...

only way i could see not pulling to redline on a dyno would be because lack of power. I have no lack of power in her now.

[Porsche]

Originally Posted by wrxgoose

only way i could see not pulling to redline on a dyno would be because lack of power. I have no lack of power in her now.

So, theoretically, one should be able to pull redline in 6th on a stock BRZ on a dyno?

I've noticed in a few videos that on dyno tests they only seem to change up to 3rd or 4th gear. Is that because the rollers and machinery don't like high speeds?

I don't know anything about dynos.

[wrxgoose]

Originally Posted by Porsche

So, theoretically, one should be able to pull redline in 6th on a stock BRZ on a dyno?

I've noticed in a few videos that on dyno tests they only seem to change up to 3rd or 4th gear. Is that because the rollers and machinery don't like high speeds?

I don't know anything about dynos.

nah, they usually just use 3rd and 4th for dyno pulls, because of the gearing. 5th is 1:1 and 6th is .67:1 or something similar.

Most dynos have a top speed of 200 mph AFAIK, but I don't think i need to worry about hitting that any time soon. lol

[TheRipler]

Originally Posted by ZDan

Seems like Chrisl covered this somewhat. I don't have first-hand knowledge, but I would guess that GPS should be reasonably accurate when acceleration is low, and at/near maximum speed, acceleration *is* very low. Whether that means +/-2mph or +/-0.1mph accuracy, I dunno...

GPS aside, my point is that no one should post 182 or 183mph on any R6, no other info given, and expect anyone with any sense to just accept it. If they're going by their speedometers (and telling the truth!), actual speed was more likely in the 160-165mph range. 186mph on an '01 Hayabusa would be about 200mph indicated on the speedo on that bike. 186 indicated ~173 actual.

Same for cars, but generally less extreme. Motorcycle speedometers are *notoriously* optimistic, sometimes much more so percentagewise at higher speeds (and hence *ridiculously* so going by mph error).



That's, um, not bad for an econobox! I keed, I keed!

198.1mph car in the Texas Mile should be doing about 197.6 at 5148' and 198.6mph at 5280' according to my spreadsheet model. To gain another 1.4mph would take another ~200'. Did you really keep the throttle pinned 200' past the mile marker?

In any case, you were freaking close to 200mph

200 feet is less than a second, if that's what it was. On the new track in Beeville, you have to keep on it for another 80ft at least. If you hit the brakes before you jump off the cliff at the end, bad things can happen when your wheels slow down too much while airborne.

The car doesn't really start working until 5th gear. I think you'd be surprised at the acceleration in 6th. I know I always am. The feeling of being sucked back into the seat peaks in 5th, but definitely doesn't go away.

[Anthony]

Originally Posted by Porsche

It cannot pull redline in 6th. The horsepower is insufficient to overcome the drag in 6th gear. Otherwise, it would do 167.28 mph @ 7400 rpm.

Perhaps my understanding of "drag limited" is askew. Help me out here, friend.

Oh, I don't know. I always thought not being able to top out top gear in a car was usually because a lack of power. "Drag limited" makes it sound like it has enough power, but the wind resistance is just too much. As if the car were trying to top out in a vacuum, it would be successful.

But I have no idea. That's just how it sounds to me.

[Dadhawk]

Stock Car: 120MPH MK1 MR2 downhill, with a tailwind. Once hit 125MPH in Daytona Ferrari, but I was a passenger.

Motorcycle: 110MPH Honda GL650 Silverwing, stupidest thing I've ever done.

Race Car: 90MPH 1957 Chevy with 455Rocket on a 0.5 mile dirt oval. Insane since I was 15 years old at the time.

Airplane: 130MPH Cessna 172 or 105MPH Cessna 152 (Inverted). Also 486MPH in a Boeing 777 2000 ft above Atlanta, but it was in a full motion simulator. Sure has heck felt real based on the sphinctermeter!

Gyroplane: 90MPH RAF2000 with Subaru auto-conversion engine

Helicopter: 85MPH Robinson R22

Sailplane: 50MPH (don't recall the make)

[Tgionet]

Originally Posted by Anthony

"Drag limited" makes it sound like it has enough power, but the wind resistance is just too much. As if the car were trying to top out in a vacuum, it would be successful.

But I have no idea. That's just how it sounds to me.

This is exactly right, wind resistance at high speed is immense.

Speeds for me:

Car: 160, 997.2 911 Turbo S
Bike: 140+, BMW F800ST
Snowmobile: 114, Yamaha Vmax 700 Triple
Fastest Crash: ~90, Polaris 340 down a hill, ~50 on the bike from a rear wheel failure.

[FReSh]

Originally Posted by Tgionet

This is exactly right, wind resistance at high speed is immense.

Speeds for me:

Car: 160, 997.2 911 Turbo S
Bike: 140+, BMW F800ST
Snowmobile: 114, Yamaha Vmax 700 Triple
Fastest Crash: ~90, Polaris 340 down a hill, ~50 on the bike from a rear wheel failure.

Snowmobile... 121 here on a cammed Yamaha RX1

Car wise... 140 in my '98 Prelude (on the track, of course...)

[Joakim3]

Originally Posted by FReSh

Snowmobile... 121 here on a cammed Yamaha RX1

Car wise... 140 in my '98 Prelude (on the track, of course...)

121 on a snowmobile.... lol that is some Travis Pastrana level balls, where at?

[Tgionet]

Originally Posted by FReSh

Snowmobile... 121 here on a cammed Yamaha RX1

Car wise... 140 in my '98 Prelude (on the track, of course...)

4 stroke though wasn't the RX1 like 150 HP stock anyway? The VMax was around 130 but made it over a range of like 1500 RPM. God I miss 2 strokes.

[Tgionet]

Originally Posted by Joakim3

121 on a snowmobile.... lol that is some Travis Pastrana level balls, where at?

All sleds will pretty much max their speeds well within a 1/4 mile.

[FReSh]

Originally Posted by Joakim3

121 on a snowmobile.... lol that is some Travis Pastrana level balls, where at?

on a big forzen lake in up-state NY. Snowmobiles are extremely stable actually... its neat to feel the wind coming over the windshield and pushing on your back, forcing you in towards the sled lol.

[FReSh]

Originally Posted by Tgionet

4 stroke though wasn't the RX1 like 150 HP stock anyway? The VMax was around 130 but made it over a range of like 1500 RPM. God I miss 2 strokes.

Yeah. The RX1 was basically the R1 bike motor stuffed into a crappy snowmobile chassis. For the sled they de-tuned the camming though. The RX1 I rode (my dad's at the time) was previously used for drag racing, and had the R1 cams installed. IDK a true power level, but it was stupid fast. Lately the direct injected Ski-doo 2-strokes seem to be the engines to beat. I rode a friends 2011 800 e-tec and it was an absolute rocket, just as fast as the RX1 I bet.

Edit: And then there's this:

[Tgionet]

I haven't ridden one in probably 7 or 8 years, last trip was up to Old Forge in '04 I believe. They were ridiculous in 2001, I can't imagine what the modern ones are like. Maybe they actually have some sort of functional braking system now.