Video: RENNtech S600 1/4 mile ridealong
02-15-2004, 12:15 AM
#1
Video: RENNtech S600 1/4 mile ridealong
http://www.treynor.com/S600-ridealong.wmv
2003 S600 w/RENNtech ECU and drag radials. Not too shabby for a daily driver
2003 S600 w/RENNtech ECU and drag radials. Not too shabby for a daily driver
02-15-2004, 12:21 AM
#2
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WOW!!!!!!!!!!!!!!!!!!!!!!
I think I watched the clip bout 6 or 7 times in a row just b/c of how amazingly fast that needle is moving
Great car!
More videos like that PLZ
Iron Sheik
I think I watched the clip bout 6 or 7 times in a row just b/c of how amazingly fast that needle is moving
Great car!
More videos like that PLZ
Iron Sheik
02-16-2004, 08:49 PM
#4
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2002 E55K RENNtech HP
Awesome acceleration!!! Treynor, were you holding the camera??
V12 must be much smoother than V8 because when I did something similar in my car I had a lot more vibration in the video picture. Anyway, how about your slicks? What size and kind are you using and what pressure works best??
V12 must be much smoother than V8 because when I did something similar in my car I had a lot more vibration in the video picture. Anyway, how about your slicks? What size and kind are you using and what pressure works best??
02-16-2004, 11:12 PM
#5
I was filming, and the launch is as smooth as silk.
Regarding tires, I'm just using drag radials. When warm, they'll hold everything the car can dish out. 265/40-18 BFG g-force drag radials on the stock rear rims
Regarding tires, I'm just using drag radials. When warm, they'll hold everything the car can dish out. 265/40-18 BFG g-force drag radials on the stock rear rims
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02-24-2004, 10:58 PM
#12
Heh - I guess you haven't seen the video yet. Best time 11.59 w/0-60 in 3.3s
A kind fellow mirrored the video for me: http://www.hedgpeth.com/mpegs/S600-ridealong.wmv
A kind fellow mirrored the video for me: http://www.hedgpeth.com/mpegs/S600-ridealong.wmv
02-25-2004, 10:30 AM
#13
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SL600, A8L W12, Continental GT, Range Rover SC
Thanks for the link to the mirror site. Great video! A few weeks ago over in the SL500/600 forum I had done a study of road test results in order to see where Car and Driver’s extraordinary test of the SL600 fit in and whether it was a stock or modified car. In order to take wheelspin out of the picture I looked at the time it took for cars to accelerate from 60 MPH to their quarter mile trap speed. Given that time, which is 11.6 – 3.3 = 8.3 seconds in your case, and the gain in speed to 120 MPH in your case, you can figure out exactly what amount of power went into increasing the kinetic energy of the car and then relate that number to rated horsepower. When I looked at that data for many magazine road tests of many different cars I found a tight relationship, particularly after adjusting for how fat the engine’s torque curve is. The funny thing is that the SL600 in the test did an 11.9 quarter and 3.6 second 0 to 60, so the difference between the two was 8.3 seconds, exactly the same as your car. Also, the trap speed in the Car and Driver test was 120 MPH, exactly the same as your car. Taking into account the weight of the SL, I figured that the engine needed to produce about 585 crankshaft horsepower during the test in order to be consistent with the road tests of other high-performance cars. That’s about the advertised horsepower of Renntech’s stage 2 tune. Since your S600 is a little over 4% heavier than the SL600, my work implies that your car produces about 610 HP with your stage 3 ECU. Does that sound about right?
Separately, have you tried using race gas in your car? My understanding is that you can only get 91 octane pump gas in CA, which sounds pretty weak for a high pressure turbo engine. Out here in the Boston area you used to be able to get Sunoco Ultra 94, but that’s recently been discontinued in favor of 93. I plan to get the Renntech mods for my new SL600 soon, and I was wondering whether octane boosters would be warranted based on your experience.
Separately, have you tried using race gas in your car? My understanding is that you can only get 91 octane pump gas in CA, which sounds pretty weak for a high pressure turbo engine. Out here in the Boston area you used to be able to get Sunoco Ultra 94, but that’s recently been discontinued in favor of 93. I plan to get the Renntech mods for my new SL600 soon, and I was wondering whether octane boosters would be warranted based on your experience.
02-25-2004, 12:39 PM
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'22 Alpina B7,'21 G63 Renntech obviously (wife), Wrangler(kids)
I used to fill my E55 with Sunoco 100 octane on a regular basis.
Will do the same with S600 when broken in.
Will do the same with S600 when broken in.
02-25-2004, 05:32 PM
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S4
Originally posted by sillydriver
Thanks for the link to the mirror site. Great video! A few weeks ago over in the SL500/600 forum I had done a study of road test results in order to see where Car and Driver’s extraordinary test of the SL600 fit in and whether it was a stock or modified car. In order to take wheelspin out of the picture I looked at the time it took for cars to accelerate from 60 MPH to their quarter mile trap speed. Given that time, which is 11.6 – 3.3 = 8.3 seconds in your case, and the gain in speed to 120 MPH in your case, you can figure out exactly what amount of power went into increasing the kinetic energy of the car and then relate that number to rated horsepower. When I looked at that data for many magazine road tests of many different cars I found a tight relationship, particularly after adjusting for how fat the engine’s torque curve is. The funny thing is that the SL600 in the test did an 11.9 quarter and 3.6 second 0 to 60, so the difference between the two was 8.3 seconds, exactly the same as your car. Also, the trap speed in the Car and Driver test was 120 MPH, exactly the same as your car. Taking into account the weight of the SL, I figured that the engine needed to produce about 585 crankshaft horsepower during the test in order to be consistent with the road tests of other high-performance cars. That’s about the advertised horsepower of Renntech’s stage 2 tune. Since your S600 is a little over 4% heavier than the SL600, my work implies that your car produces about 610 HP with your stage 3 ECU. Does that sound about right?
Separately, have you tried using race gas in your car? My understanding is that you can only get 91 octane pump gas in CA, which sounds pretty weak for a high pressure turbo engine. Out here in the Boston area you used to be able to get Sunoco Ultra 94, but that’s recently been discontinued in favor of 93. I plan to get the Renntech mods for my new SL600 soon, and I was wondering whether octane boosters would be warranted based on your experience.
Thanks for the link to the mirror site. Great video! A few weeks ago over in the SL500/600 forum I had done a study of road test results in order to see where Car and Driver’s extraordinary test of the SL600 fit in and whether it was a stock or modified car. In order to take wheelspin out of the picture I looked at the time it took for cars to accelerate from 60 MPH to their quarter mile trap speed. Given that time, which is 11.6 – 3.3 = 8.3 seconds in your case, and the gain in speed to 120 MPH in your case, you can figure out exactly what amount of power went into increasing the kinetic energy of the car and then relate that number to rated horsepower. When I looked at that data for many magazine road tests of many different cars I found a tight relationship, particularly after adjusting for how fat the engine’s torque curve is. The funny thing is that the SL600 in the test did an 11.9 quarter and 3.6 second 0 to 60, so the difference between the two was 8.3 seconds, exactly the same as your car. Also, the trap speed in the Car and Driver test was 120 MPH, exactly the same as your car. Taking into account the weight of the SL, I figured that the engine needed to produce about 585 crankshaft horsepower during the test in order to be consistent with the road tests of other high-performance cars. That’s about the advertised horsepower of Renntech’s stage 2 tune. Since your S600 is a little over 4% heavier than the SL600, my work implies that your car produces about 610 HP with your stage 3 ECU. Does that sound about right?
Separately, have you tried using race gas in your car? My understanding is that you can only get 91 octane pump gas in CA, which sounds pretty weak for a high pressure turbo engine. Out here in the Boston area you used to be able to get Sunoco Ultra 94, but that’s recently been discontinued in favor of 93. I plan to get the Renntech mods for my new SL600 soon, and I was wondering whether octane boosters would be warranted based on your experience.
)
02-26-2004, 01:36 AM
#18
SD - your calculations are fairly accurate. I've dyno'd my S600 at 525 RWHP, which puts it at low/mid 600s BHP. You will also find a number of sites out there which calculate RWHP from 1/4 mile MPH and trap speed.
In the case of the SL600, I think the reality is that it is more like 7-8% lighter than the S600, and was probably making ~550 BHP, about what my car made when stock.
Finally, there is a station 4 blocks from my house which sells VP racing 103 unleaded from the pump I find that it makes a very noticeable difference - about 3 mph in the 1/4, actually. I would definitely recommend experimenting with various octanes in your car.
In the case of the SL600, I think the reality is that it is more like 7-8% lighter than the S600, and was probably making ~550 BHP, about what my car made when stock.
Finally, there is a station 4 blocks from my house which sells VP racing 103 unleaded from the pump
I find that it makes a very noticeable difference - about 3 mph in the 1/4, actually. I would definitely recommend experimenting with various octanes in your car.
02-26-2004, 08:31 AM
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S4
Originally posted by treynor
SD - your calculations are fairly accurate. I've dyno'd my S600 at 525 RWHP, which puts it at low/mid 600s BHP. You will also find a number of sites out there which calculate RWHP from 1/4 mile MPH and trap speed.
In the case of the SL600, I think the reality is that it is more like 7-8% lighter than the S600, and was probably making ~550 BHP, about what my car made when stock.
Finally, there is a station 4 blocks from my house which sells VP racing 103 unleaded from the pump I find that it makes a very noticeable difference - about 3 mph in the 1/4, actually. I would definitely recommend experimenting with various octanes in your car.
SD - your calculations are fairly accurate. I've dyno'd my S600 at 525 RWHP, which puts it at low/mid 600s BHP. You will also find a number of sites out there which calculate RWHP from 1/4 mile MPH and trap speed.
In the case of the SL600, I think the reality is that it is more like 7-8% lighter than the S600, and was probably making ~550 BHP, about what my car made when stock.
Finally, there is a station 4 blocks from my house which sells VP racing 103 unleaded from the pump
I find that it makes a very noticeable difference - about 3 mph in the 1/4, actually. I would definitely recommend experimenting with various octanes in your car.
thanks
02-26-2004, 09:59 AM
#21
> how do you figure s600 to make 550 hp stock, when they rate it at 493??
Mercedes may rate the S600 at 493 BHP, but my S600 dyno'd at 481 RWHP bone stock. That's 550 - 600 BHP stock,
depending on your assumptions of driveline loss.
Presumably they don't want the 600 series eclipsing the AMG x55 cars, which make 390-420 RWHP stock, so they advertise them as being the same...
Mercedes may rate the S600 at 493 BHP, but my S600 dyno'd at 481 RWHP bone stock. That's 550 - 600 BHP stock,
depending on your assumptions of driveline loss.
Presumably they don't want the 600 series eclipsing the AMG x55 cars, which make 390-420 RWHP stock, so they advertise them as being the same...
02-26-2004, 10:17 AM
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S4
Originally posted by treynor
> how do you figure s600 to make 550 hp stock, when they rate it at 493??
Mercedes may rate the S600 at 493 BHP, but my S600 dyno'd at 481 RWHP bone stock. That's 550 - 600 BHP stock,
depending on your assumptions of driveline loss.
Presumably they don't want the 600 series eclipsing the AMG x55 cars, which make 390-420 RWHP stock, so they advertise them as being the same...
> how do you figure s600 to make 550 hp stock, when they rate it at 493??
Mercedes may rate the S600 at 493 BHP, but my S600 dyno'd at 481 RWHP bone stock. That's 550 - 600 BHP stock,
depending on your assumptions of driveline loss.
Presumably they don't want the 600 series eclipsing the AMG x55 cars, which make 390-420 RWHP stock, so they advertise them as being the same...
02-26-2004, 07:43 PM
#23
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'22 Alpina B7,'21 G63 Renntech obviously (wife), Wrangler(kids)
Treynor is right about hp difference between 600 and 55.
My E55 with Renntech pulley and ECU ( on racing gas) showed only 399 hp at the wheels.
My E55 with Renntech pulley and ECU ( on racing gas) showed only 399 hp at the wheels.
02-27-2004, 11:17 AM
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Guys... this car is making 525rwhp AND 670rwtq
The way to calculate flywheel horsepower/torque from rear wheel number is to first determine an accurate drivetrain loss. Depending on design drivetrain loss can be below 10% for motorcycles and over 25% for some cars. In the case of the S600 it is VERY reasonable to use 21%. Loss increases with many things including the weight of the driven components and the degree of refinement for smooth performance (both of which are on the high side with this car).
Take you loss, in this case 21%, subtract from 100% and you have 79%. This is what reaches the ground. Take your rear wheel numbers and divide by 79 and to correct for flywheel multiply by 100.
525 / 79 X 100 = 665hp
670 / 79 X 100 = 848tq
The way to calculate flywheel horsepower/torque from rear wheel number is to first determine an accurate drivetrain loss. Depending on design drivetrain loss can be below 10% for motorcycles and over 25% for some cars. In the case of the S600 it is VERY reasonable to use 21%. Loss increases with many things including the weight of the driven components and the degree of refinement for smooth performance (both of which are on the high side with this car).
Take you loss, in this case 21%, subtract from 100% and you have 79%. This is what reaches the ground. Take your rear wheel numbers and divide by 79 and to correct for flywheel multiply by 100.
525 / 79 X 100 = 665hp
670 / 79 X 100 = 848tq
