Highest recorded top speed of 3/S? Has anyone ever broke 200mph...

[mb7050]

this is the part that i would like to get translated I dont quite understand what they are saying .
Кстати, свою лепту в увеличение Сх внесли «псевдоспортивные» элементы дизайна — например, заглушенные карманы между дверьми и арками задних крыльев, имитирующие гоночные воздухозаборники для охлаждения задних тормозов.

[stealthee]

idk but imagine a stealth wing back there and note how the airflow would almost completely miss it .

Actually is possible the RT sail panels can direct airflow directly over the Stealth spoiler. I beleive it's one of the Aston Martin models that has a similar sail panel and spoiler setup.

[mehrshadvr4]

Those would need to be 500 big turbo horsepower close to redline. Not the 500 horsepower at 5500 rpm that TD04 bolt-on turbos provide. The VR4's engine does not compliment the gearing too well.

I hate speculation, but we have over 230lbs of rotating weight to overcome (in stock form) before 1hp gets to the ground vs any of the rwd comparisons. Idk what the F40's drivetrain weighs

Summary of Russian wind tunnel test:
The active Aero doesn't do much for drag, it neutralizes lift in the rear and minimizes lift in the front. It wouldn't go any faster, but it'd be more pleasant to drive at top speed lol

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this is why a stock 1st gen vr4 could only do 140 in 4th gear. i don't remember which magazine it was that i read, but they were saying the active aero does give enough drag so the car to lose 5 or 6 mph top speed when on even when mitsubishi said it won't cause any drag. the other thing you said which is right was the turbos ran out of breath in 4th and 140mph and the car wouldn't go any faster, but as soon as they put the car in 5th with active aero off the car gained speed to 161 mph. imagine front one down with out activating the rear spoiler. there should be couple mph there so i'm guessing with 6 speed and ~550whp it should be able to get to 200 in 6th. and also our complete awd weights 300lbs. we are not turning 230lbs at once and that extra weight already translated to less power to the wheel.we are not going to lose more power as we speed. plus no car really makes peak hp at the redline (beside hondas) so these cars doing that speed should have close power band to most normal cars. 9bs lose a lot of power on top because of running out of breath. bigger even td04 will have much less power lose on top because they can keep up with the engine.
another interesting video from bm. puma GTO did about 176mph GPS verified here with 330bhp. the car is lowered so it might help a little with top speed. let's say it makes 300whp and mitsubishi was lying with the power (look how bad it loses to 420bph GTR) . still 200+ more whp should get us the missing 24mph here. pay attention at 9:23 on the video. the passenger window is sticking out of the frame on the gto on the high speed race. i wonder if this happens to all 3/Ss when going that fast?

[Julianvr4]

When I weighed my 1G vr4 rims, they were 51 lbs EACH with bald tires. The dtiveshaft is another 35, the clutch, flywheel and pressure plate is another 30'ish (conservative guess)

That's not counting rods/crank/pistons/ damper pulley. That's also not counting 4 brake rotors at 15 or whatever lbs each.

The notion that a car won't make peak power at redline is false. That's LARGELY a mechanic of the cams and the turbos are also a big deal if they are too small. VR4's happen to have both that are too small

A good friend of mine dyno'd 475 on his stroked, cammed 383'd Camaro. It was still making power at 6700. He didn't rev higher because he didn't want his block flying apart.

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[mehrshadvr4]

what i meant was factory cars. of course you can change the power band with with cams and turbos intake manifolds and so on.

[Julianvr4]

Weren't we doing that anyway? We are making a 200mph car


EDIT: bone stock 997.2 GT3 dyno. It makes peak power a lil before redline and HOLDS it.

http://www.6speedonline.com/forums/gt3-gt2-gt/197704-jesuss-2010-997-2-gt3-bone-stock-dyno-figures.html




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[J. Fast]

another interesting video from bm. puma GTO did about 176mph GPS verified here with 330bhp. the car is lowered so it might help a little with top speed. let's say it makes 300whp and mitsubishi was lying with the power (look how bad it loses to 420bph GTR) . still 200+ more whp should get us the missing 24mph here. pay attention at 9:23 on the video. the passenger window is sticking out of the frame on the gto on the high speed race. i wonder if this happens to all 3/Ss when going that fast?

I would guess those side windows are lexan. I'm not sure if you saw the credits in the beginning but that particular Puma GTO was cornerweighed at 3218 lbs with driver and full tank of petrol. I'm thinking based on what's left in there that's how they got there, but IDK?

I also remember when I stripped out "because racecar" there were numerous cabin pressure relief tubes. I thought that was the intent of those? I assumed those were intended to keep the windows from getting sucked out and to equalize the pressure differentials at the boundry layers? I wonder if they blocked them or something? Are there not cabin pressure relief tubes right off the A pilliars, B pilliars, and sideskirts?

Also, weren't the Puma cars unique in that they were seam welded as well?

[J. Fast]

Alright, so I went back and scrutinized a bunch of really old pics because I was certain I came across pressure chambers. There are infact (3) cabin pressure differential chambers built into our vehicles design. They're located in the A-plliars, B-pilliars, and in the main down stays above the doors.

The pressure tubes for the main stays connect with the vent chamber directly infront of the windshield and the A-pilliars have a filter that connects to a penetraition behind the 3rd layer that drops out the bottom of the lower box curtain rail and dump under the car.



The B pilliars have these pressure tubes hidden behind the first layer of the monococue.



You guys think the windows are bowing due to excess cabin pressure? Think we need more penetrations to get a better equallibrum? Jason Y mentioned he hit the high 180's possibly 190's (?) and his windows started buckiling. The video mehrshad posted clearly depicts what Jason was talking about. If our windows bend 2" out at 175mph when they're rolled up there's no F-N way you can do 200mph without them shattering... And I can attest to the fact that there's way too much drag with the windows down to break 200 mph so this will prove to be harder than expected hrmmm...

Need a fix for this pressure differential. Wether the windows are down, or with nets. Any Ideas?

[R/T93]

I just crack my sunroof or a window and it solves all buffeting/pressure issues when I am at the race track.

[mehrshadvr4]

I would guess those side windows are lexan. I'm not sure if you saw the credits in the beginning but that particular Puma GTO was cornerweighed at 3218 lbs with driver and full tank of petrol. I'm thinking based on what's left in there that's how they got there, but IDK?

I also remember when I stripped out "because racecar" there were numerous cabin pressure relief tubes. I thought that was the intent of those? I assumed those were intended to keep the windows from getting sucked out and to equalize the pressure differentials at the boundry layers? I wonder if they blocked them or something? Are there not cabin pressure relief tubes right off the A pilliars, B pilliars, and sideskirts?

Also, weren't the Puma cars unique in that they were seam welded as well?

i don't think weight had much to do with max speed. in there the GTO had the least power to weight ratio but it had the 2nd fastest speed after n1 gtr with 430bhp. i think the best way is to try to find a way to push the window well in to the groves. i couldn't tell if the driver side window was buckling too. cracking the sunroof open is a pretty good idea too. the other think is most cars have cabin vent on the rear behind the bumper. that should reduce the cabin pressure. not sure if 3/S has it since i have never taken the pumper off, but my lexus and my civic had them. making them somehow so they cause vacuum should reduce cabin pressure . i also wonder blocking the went where the heater gets it's air would reduce cabin pressure since at high speed that's high pressure area and it has room to inside of the cabin.

edit: nm i just realized those vents are on the b pillars behind the door instead of being behind rear pumper like most cars. it'll be a bitch to cause that to create vacuum because of the location and size of it. wonder that's why our car has high cabin pressure issue?