What does it take to get to 200 mph top speed in a 996 Twin Turbo?
#16
11-05-2011 | 02:00 PM
Registered User
Joined: May 2008
Posts: 973
From: North Vancouver, BC
Rep Power: 62
Ttheree was a post about a year ago that indicated it would take 531HP to get the TT to 200 mph. That kind of power can be done easily but not cheaply. You're talking doing the "Chip", new exhaust from the headers on back and probably a new MAF. I sugest you talk to someone like Evolution Motorsports or one of the other fine tuning organizations.
Also, if suspension is original I'd look at something like Bilstein PSS10's to steady the car.
John in Vancouver
Also, if suspension is original I'd look at something like Bilstein PSS10's to steady the car.
John in Vancouver
#17
11-05-2011 | 04:02 PM
Registered User
Joined: Jul 2007
Posts: 1,276
From: London
Rep Power: 87
All you need is a good flash and exhaust. Snowczar also makes good point about pss10's. And make sure your flash raises the rev limiter by 500rpm otherwise limiter will stop you getting there as it stops me at 194mph.
#18
11-07-2011 | 08:40 PM
Thread Starter
|
Registered User
Joined: Nov 2006
Posts: 144
From: Indiana
Rep Power: 0
Curious to know, do you want to see 200 on the speedo or know you without a doubt officially traveled that speed?
200 on the speedo is most likely actually between 180-185 mph on a good day. Years ago, 1985 I raced at Bonneville Salt Flats on a Honda 1000cc motorcycle. I did 3 runs and all of them speedo eclipsed 170 mph. My best official was 148.546 mph. My speedo was driven off front wheel. Most all speedos have a built in error factor of around 5-12%.
200 on the speedo is most likely actually between 180-185 mph on a good day. Years ago, 1985 I raced at Bonneville Salt Flats on a Honda 1000cc motorcycle. I did 3 runs and all of them speedo eclipsed 170 mph. My best official was 148.546 mph. My speedo was driven off front wheel. Most all speedos have a built in error factor of around 5-12%.
I am looking for a GPS verified 200 + mph run.
#19
11-08-2011 | 02:42 AM
Registered User
Joined: Jul 2007
Posts: 1,276
From: London
Rep Power: 87
I thought near enough is what you were after. Verifed - true - will be difficult. Power is not a problem, gearing is. True 200mph if you look at the transmission diagram is theoretically achieved at about 7,250 rpm in 6th. I know my car with 530bhp /crank, could easily go faster because car is still accelerating as it hits the rev limiter (stock) at 327km/h - 203.23mph - speedo indicated. Some guys up their rev limiters by 500 rpm and I understand they achieved speeds which are a whisker short of true 200mph. What happens if you up the rev limiter even more, for a true 200mph, I have no idea. I think the engine might just explode and create a massive one-off run to 300 mph!!! 
Last edited by Terminator; 11-08-2011 at 02:49 AM.
#20
11-08-2011 | 02:59 AM
Registered User
Joined: Aug 2011
Posts: 217
From: VA
Rep Power: 22
I thought near enough is what you were after. Verifed - true - will be difficult. Power is not a problem, gearing is. True 200mph if you look at the transmission diagram is theoretically achieved at about 7,250 rpm in 6th. I know my car with 530bhp /crank, could easily go faster because car is still accelerating as it hits the rev limiter (stock) at 327km/h - 203.23mph - speedo indicated. Some guys up their rev limiters by 500 rpm and I understand they achieved speeds which are a whisker short of true 200mph. What happens if you up the rev limiter even more, for a true 200mph, I have no idea. I think the engine might just explode and create a massive one-off run to 300 mph!!!
I also had a question (not to hijack) which turbos would get you to 200 mph in the Texas mile?I have stock k24s and would love to be able to just change out the compressor wheel to achieve this, or is that not reasonable?
#22
11-08-2011 | 08:11 AM
Registered User
Joined: Jul 2010
Posts: 3,319
From: Long island NY
Rep Power: 380
Great advise and I second that.. There is not much that is needed to reach 200mph in stock form as long as the wind is none existent and enough road is there. My research showed me the stock TT needs about 300 hp to go 200 miles an hour. But we would like to do that in a mile and even worse a standing start. Now I have ran the mile in texas and my car made just under 650 rwhp on a dyno jet and my best time was 191.877. I was on stock tires. What is important is where your power is. When you are topping out a gear you do not have the power you have in the peak. My math tells me that a 3500lbs stock bodied turbo needs about 940-960 ft lbs of torque (in top gear at rpm need for speed) to produce a 235-240 mph standing mile run.
#23
11-08-2011 | 09:51 AM
Registered User
Joined: Jul 2008
Posts: 5,301
From: Houston
Rep Power: 606
So what your saying is our gearing runs out right around 200mph/320kmh?
I also had a question (not to hijack) which turbos would get you to 200 mph in the Texas mile?I have stock k24s and would love to be able to just change out the compressor wheel to achieve this, or is that not reasonable?
I also had a question (not to hijack) which turbos would get you to 200 mph in the Texas mile?I have stock k24s and would love to be able to just change out the compressor wheel to achieve this, or is that not reasonable?
Convert your turbos to k24/20's.
#24
11-08-2011 | 11:06 AM
So what your saying is our gearing runs out right around 200mph/320kmh?
I also had a question (not to hijack) which turbos would get you to 200 mph in the Texas mile?I have stock k24s and would love to be able to just change out the compressor wheel to achieve this, or is that not reasonable?
I also had a question (not to hijack) which turbos would get you to 200 mph in the Texas mile?I have stock k24s and would love to be able to just change out the compressor wheel to achieve this, or is that not reasonable?
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
#25
11-08-2011 | 11:19 AM
Thank you for the replies so far. Some great information, especially the part about aero kits actually harming my ability to hit the higher speeds quickly.
To clarify, I want to be able to reach 200 mph at the Texas Mile, so I guess one could call that the 'brute force' approach to speed. My E63 AMG without the limiter can reach 186 mph with enough road, but something about having that ability to go from a standing start to 200 mph in 1 mile has been calling my name, and I have to get there.
As far as suspension, and getting lower to the ground, I have heard both positives and negatives about coilover suspensions. While these would serve to easily get me lower to the ground, would the spring rates and rebound of the shocks make the car significantly more 'edgy' at super high speeds? The stability of the 911 at high speeds is one of the major pluses in my eyes.
To clarify, I want to be able to reach 200 mph at the Texas Mile, so I guess one could call that the 'brute force' approach to speed. My E63 AMG without the limiter can reach 186 mph with enough road, but something about having that ability to go from a standing start to 200 mph in 1 mile has been calling my name, and I have to get there.
As far as suspension, and getting lower to the ground, I have heard both positives and negatives about coilover suspensions. While these would serve to easily get me lower to the ground, would the spring rates and rebound of the shocks make the car significantly more 'edgy' at super high speeds? The stability of the 911 at high speeds is one of the major pluses in my eyes.
I believe my car now will do 200mph....I also do believe you would need a higher rev limit then stock to see that,my raised rev limiter did help......I have had it to 181mph on my speedo[ its probably higher because of the 1'' bigger dia. tires] hitting the rev limiter in 5th and then in 6th 'pulling' still to 190mph but ran out of room.....Can not wait to see 200mph,,,so does the traffic cop that will be hiding/waiting for me somewhere .......lol......
Bottom line: Going 200 @ the mile is a minimum $20k investment.
#26
11-08-2011 | 11:32 AM
Registered User
Joined: May 2010
Posts: 1,516
From: Scotland
Rep Power: 98
K1639's Turbos
soft intake pipe
60 lb injectors
decent exhaust
Decent IC's
Tip box
Decent Tune for 1.5 bar
EBC gain 6% set gain 0.0
Pump Fuel ( 93 absolutly no additives or race fuel)
200.77 mph GPS verified in 1.4 miles on a 1.5% incline.Oh and it was still pulling hard when I had to hit the brakes.
Standing start 0-200 mph ( gps) 34.17 seconds. Was reading 206 mph on the dash!
Lap after Lap after Lap after Lap.......................
In Fact the only reason I stopped was my standard brakes were smoking and I mean smoking.
Suspension is new PSS10's ( fantastic btw)
soft intake pipe
60 lb injectors
decent exhaust
Decent IC's
Tip box
Decent Tune for 1.5 bar
EBC gain 6% set gain 0.0
Pump Fuel ( 93 absolutly no additives or race fuel)
200.77 mph GPS verified in 1.4 miles on a 1.5% incline.Oh and it was still pulling hard when I had to hit the brakes.
Standing start 0-200 mph ( gps) 34.17 seconds. Was reading 206 mph on the dash!
Lap after Lap after Lap after Lap.......................
In Fact the only reason I stopped was my standard brakes were smoking and I mean smoking.Suspension is new PSS10's ( fantastic btw)
Last edited by Frank ( Sunnyside ); 11-08-2011 at 11:40 AM.
#27
11-08-2011 | 11:41 AM
Registered User
Joined: Oct 2005
Posts: 5,597
Rep Power: 331
i have k24s, rwd, my car is SLAMMED.
i hit 202 CONFORTABLY on jones beach. my car makes ~500rwhp.
if memory serves right, this was on a 315 michelin.
i run 305 30's now, so it will probably be good for another ~8mph , right tim ?
i hit 202 CONFORTABLY on jones beach. my car makes ~500rwhp.
if memory serves right, this was on a 315 michelin.
i run 305 30's now, so it will probably be good for another ~8mph , right tim ?
#28
11-08-2011 | 12:05 PM
I am pretty sure I will be able to do 200mph on an open road area,,,not a standing mile run with my mods...As metioned before I have had it up to 190mph on my speedo and it was still pulling but ran out of road...
#29
11-08-2011 | 12:08 PM
Registered User
Joined: Jul 2008
Posts: 6,453
From: CT
Rep Power: 438
Great advise and I second that.. There is not much that is needed to reach 200mph in stock form as long as the wind is none existent and enough road is there. My research showed me the stock TT needs about 300 hp to go 200 miles an hour. But we would like to do that in a mile and even worse a standing start. Now I have ran the mile in texas and my car made just under 650 rwhp on a dyno jet and my best time was 191.877. I was on stock tires. What is important is where your power is. When you are topping out a gear you do not have the power you have in the peak. My math tells me that a 3500lbs stock bodied turbo needs about 940-960 ft lbs of torque (in top gear at rpm need for speed) to produce a 235-240 mph standing mile run.
#30
11-08-2011 | 12:14 PM
That wind was brutal. That was a good weekend though.
If we are talking running 200mph with endless road you can do it with a flash most likely. I thought I saw you ask about doing so in the standing mile ..........
If we are talking running 200mph with endless road you can do it with a flash most likely. I thought I saw you ask about doing so in the standing mile ..........