TVD vs Torsen HP loss??
03-07-17, 02:33 PM
#16
Lexus Champion
I haven't seen a real TVD vs Torsen match-up; not from a dig or roll. I would be interested in seeing this, but only if both cars were stock. We know what TVD offers on the track, but does it help put power down from 0? It does make sense that if TVD is part of drivetrain and adds to drivetrain loss, then the car would yield less rwhp. This is speculation of course. Then again, I would need to see dynos to agree fully. The TVD is only 41 lbs heavier than the torsen car and that's negligible.
03-07-17, 08:04 PM
#19
Had a 2015 with the Torsen, now a 2017 with the TVD, enjoy the feel of driving the TVD car much better.
03-07-17, 09:48 PM
#20
Tech Info Resource
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I've played with the TVD in the GS F. I like the OS Giken in my IS F far better. I also like the 300 pounds lighter in the IS F. I've seen the Giken do things I though could only be done with active control. It's worth its weight in gold for sure, and it's not exactly light.
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03-08-17, 12:40 PM
#23
Lexus Champion
iTrader: (20)
lets just talk about pure physics for straight line speed. rc-f, same weight driver, same gas amount in the tank, same everything. one has TVD and one doesnt. one will weight 65 more lbs and on top of that, its in the drive line. tell me why wouldn't the heavier one be a bit slower?
03-08-17, 01:55 PM
#25
Lead Lap
I have been pretty sure the TVD will slow the car down in straight line acceleration and also in the top end (150+ mph). Which is why I didn't want it. Without solid proof it's all conjecture anyway. But my opinion is the only one that matters to me when it comes to my money.
I'm also curious how the TVD will handle increased power output, like from forced induction. I don't know the mechanics involved, but I speculate that it will not be as strong as the LSD. More complexity means more links to break.
If I were a road course junkie I think I would insist on it. But the LSD suits my needs.
I'm also curious how the TVD will handle increased power output, like from forced induction. I don't know the mechanics involved, but I speculate that it will not be as strong as the LSD. More complexity means more links to break.
If I were a road course junkie I think I would insist on it. But the LSD suits my needs.
03-08-17, 02:32 PM
#26
lets just talk about pure physics for straight line speed. rc-f, same weight driver, same gas amount in the tank, same everything. one has TVD and one doesnt. one will weight 65 more lbs and on top of that, its in the drive line. tell me why wouldn't the heavier one be a bit slower?
Last edited by lobuxracer; 03-08-17 at 03:05 PM.
03-08-17, 03:07 PM
#27
Tech Info Resource
iTrader: (2)
The 65lb difference between the two cars would mean as much as two non-TVD cars racing and one driver weighs 160 and the other 225. In the real world 65 lb doesn't equate to any measurable advantage imo. You can take two 2015 cars with the same mods and dyno them right after the other and still have a difference in RWHP because the way one owner broke in his engine and how the learning ECU had adapted to aggressive driving. I was more interested in the CF pieces than the actual TVD but this heavy coupe does benefit from assisted rear rotation
03-08-17, 06:06 PM
#28
Lexus Champion
iTrader: (20)
The 65lb difference between the two cars would mean as much as two non-TVD cars racing and one driver weighs 160 and the other 225. In the real world 65 lb doesn't equate to any measurable advantage imo. You can take two 2015 cars with the same mods and dyno them right after the other and still have a difference in RWHP because the way one owner broke in his engine and how the learning ECU had adapted to aggressive driving. I was more interested in the CF pieces than the actual TVD but this heavy coupe does benefit from assisted rear rotation
understood. 65lbs to most people is a lot and its huge to me. i know I'm not the only one who use to take out the spare tire in the back and felt a difference, lol. you have to think, some of the fastest ISF owners, they take out spare, jack, front engine cover (due to heatsoak as well), . with RR racing's new battery, taking out the factory tools in the rcf, lighter wheels/tires, 2 piece brakes, lighter exhaust , dipping in in the low 3800s lbs which should be a noticeable feel and improvement.
03-08-17, 06:24 PM
#29
Lexus Champion
understood. 65lbs to most people is a lot and its huge to me. i know I'm not the only one who use to take out the spare tire in the back and felt a difference, lol. you have to think, some of the fastest ISF owners, they take out spare, jack, front engine cover (due to heatsoak as well), . with RR racing's new battery, taking out the factory tools in the rcf, lighter wheels/tires, 2 piece brakes, lighter exhaust , dipping in in the low 3800s lbs which should be a noticeable feel and improvement.
03-08-17, 06:36 PM
#30
agree with you on this! The TVD RCF is only 41 lbs heavier than Torsen RCF. The TVD does weigh 65lbs more than Torsen, but the TVD car gets CF roof and rear wing and brings the difference to 41 lbs. An RCF with Torsen and CF bits would be the lightest yet. Have they separated the CF from performance package for 2017?