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Open Diff or LSD?

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diff lsd open
38K views 59 replies 23 participants last post by  RPW00Mirage 
#1 ·
Please tell me we have an LSD
 
#3 · (Edited)
The current VT does not.



More goodies = More $$$

The current VT is an inexpensively fast hatchback with tech & utility, with autocross/tracking capabilities. It is not a track beast, like a Mazdaspeed3, Focus ST, etc. Think of it as a thrifty GTI, which is very much a compliment, the GTI has been the all-round benchmark for hot hatches. It's cheaper to buy and maintain, but sacrifices the mechanical and refinement of being in the market and dominating it (not in performance, but in market share).

Due to the price, style(some may or may not agree), and the reliability factor, the VT will always been a good alternative to the category. It may not perform as well on a track or through pylons in an empty parking lot, but what it does offer, it does it well.
 
#5 ·
people are placing too much faith in an LSD.. a good set of tires and good suspension setup will make you not care about it. the biggest time an lsd helps is coming out of the corners.. yes it makes it so you can do 2 wheel burnouts instead of "one wheel peels" but it's not something that REALLY helps you going in a straight line.. There are many higher horsepower cars that don't have an lsd and do just fine (my car included)
 
#7 ·
This car has a lot of features for the price and most buyers of this car are no thinking about high speed cornering. If you plan on buying a more track worthy car, I suggest the Fiat Abarth 500, Focus ST, Golf GTI, Civic SI or Mini Cooper S. None of these cars will match the features per dollar of this car or the fuel economy either.
 
#9 ·
In my opinion a true Hi-Po FWD vehicle will have LSD. Nothing wrong with the V or VT but they really aren't HiPo vehicles. When I replaced the open diff in my GSR with the ITR tranny (with LSD) the improvement in straight away traction and cornering traction was absolutely astounding.
 
#20 ·
But to say that theres not a huge benefit is ridiculous. Can a car be driven without lsd controlled, yes. With proper suspension dimensions and setup amd sticky tires you can mask alot of problems.....

But they still have their limitations. Yes i have had a car with non lsd and lsd set up, and the difference was night and day. It was rear wheel drive, not fwd so no i havent had that experience. But having two wheels put power to the ground is better than one in any universe.

and congrats on the 350 hp car with no lsd *golf clap*! Now throw an lsd on their and actually put the power to the ground where you don't have to limit the cars potential to take off or get around a corner!

Sent from my DROID BIONIC using AutoGuide.Com Free App
 
#21 ·
So...um...has anyone heard if an LSD is in the works? Anyone pulled a trans apart and taken a look at the diff or know if it's similar to anything else that may crossover? For what it's worth I had my Veloster Turbo at the track Friday (Willow Springs---the big track) and only had a small issue with wheel spin in turn 4 (with the traction control off)---I think if I'd been at the smaller track (Streets of Willow course) or an autocross the wheel spin/lower speed corners would have been more of an issue. Sticky tires and better spring rates would have certainly helped with it, but eventually an LSD will be a nice upgrade for someone who regularly tracks/races the car...
 
#22 ·
Lets get one thing straight. No one is ever DDing a car that "has 350whp". Horsepower is an output not something you have. You're DDing a car with the potential to produce 350WHP. At no point will you be legally producing said power. So the arguments for suspension work, wheels, and LSD are all together pointless regarding daily drivers.

An LSD on daily drivers will help you get going form the stopped position in daily driving commutes. They have no real benefit on public roads while already moving in slick conditions. In fact it's actually safer to have no LSD in slippery conditions while moving.

When it comes to the track both argument hold merit. However which one is the best bang for your buck? That's the question to ask.
 
#23 ·
Agreed---I haven't been able to find a diff yet and I'd bet there's something out there that'll work/is close. I sell quaife and KAAZ at the shop and we actually use a KIA trans in our Mazda/Ford Escort roadrace cars---they are nearly identical except for the axle spline count. I'm new to the car and found this thread in my search's...Anyone have any knowledge about the trans/finding a diff?
 
#26 ·
yup which was my original point.. unless you're doing hard core autox proper tire and suspension will be significantly more helpful then a factory LSD, i mean an lsd helps when going around corners because you're lifting weigh off of one wheel due to body roll, minimize body roll increase traction helps things (not solves) but helps and considering for MOST people they wont hit a track outside of maybe a 1/4 mile from time to time. Personally I wouldnt pay the extra probably 2k for a factory LSD unless it came with a revised suspension and I dont mean to overhaul the rear end like people keep asking for added rear sway and different shocks/ springs would do it for me there are alot of cars that dont use a macpherson style strut rear end and stuff like people are asking for and handle better then a stock VT. and I doubt all of that could happen for 2k considering most quaife lsd run around 900-1500 out of the gate
 
#29 ·
It's either you give all the performance parts, charge for performance and compete with other performance cars or you don't give performance parts, don't charge performance prices (relative to cars in more of a performance market) and compete in a lower (completely different) market, which is exactly what this car does.
 
#31 ·
I can answer that question. The slower 0-60 times compared with the Honda Civic SI and Scion FR-S become very obvious when the Scion FR-S engine is compared to the Hyundai Veloster Turbo engine. The numbers indicate the Scion FR-S is much faster, but look closer. The only way to get great numbers with the flat four engine is by revving to its ideal RPM and keeping it their between shifts. This is not a huge problem for drag racing or even depending on the track for handling purposes. The Hyundai Veloster Turbo has a much better daily driving engine because it produces good power at almost any RPM, but it loses some time during acceleration from zero. I could be wrong on this assumption, but I think the transmission is also geared more for fuel economy than racing especially with three gears less than 1 to 1. This allows for insane 40+mpg cruising during ideal conditions at the loss of acceleration. This is why the Scion FR-S will never compete with the fuel economy of the Veloster Turbo and the Veloster Turbo will never compete with FR-S acceleration times.

What happens if the Veloster Turbo engine is placed in an FR-S and the transmission and differential was changed to take advantage for having power at any RPM?
 
#33 ·
Not that I've been able to find---I talked to a couple diff manufacturers (OS GIKEN and KAAZ) at SEMA and they said they'd be interested if I got them a transmission---I spoke with a rep at Hyundai briefly and he said he'd look into getting me a trans---I'd be interested to know what other vehicle's the trans was used in---never know there might already be a diff available for another application...
 
#34 ·
I don't know how any self respecting car enthusiast can argue against the benefit of a LSD on a performance oriented car. The FR-S/BRZ puts down the same amount of power and less torque yet it has a Torsen LSD, which makes a big difference accelerating off the line and out of a corner. Boy the FR-S is a fun car to drive.

Have you guy see the traction control light flashing when you accelerate? With a LSD, it won't happen as often. The very first day that I got my car, I went straight to the tire shop and put on summer performance tires. Even with the stickier Hankook Evo V12 I can have traction issue in the dry and often in the wet. There is no doubt in my mind that the VT will be a more enjoyable car to drive with a mechanical LSD.

Honestly, I am very willing to pay for one. The problem is that the installation can cost a lot, and people generally are willing to pay X amount of dollar for Y amount of utility/benefit. So, it might not be a very profitable proposition for vendors to engineer a solution for the VT.
 
#35 ·
oy vey man the brz has alot more things going for it then just the lsd.. yes an lsd helps, however they're EXTREMELY expensive usually like you said between parts and install, but a proper suspension/ tires will help out a huge amount and be more cost effective (this is what I've been saying) and if you're spinning tires even with the v12s i'm willing to bet that it has nothing to do with not a LSD, what is the temperature you're running those v12s in? is your car lowered?

you probably shouldn't say "i don't know how any self respecting car enthusiast can argue against the benefits of an LSD"

not to mention .. this car isn't a performance oriented car ....
 
#41 ·
I, for one would like to see an LSD option for this trans on my VT. ...and wouldn't mind going through the expense of installing it. Makes a huge difference in traction, regardless of tire and suspension mods. BTW, I'm running Pilot Supersport's and still get the thing to spin, whether it's in the corner or on launch (In FLORIDA). My last car had north of 370 RWHP and saw significant improvements all around after installing my Quaife.
...and I agree with the above remarks regarding why I bought this car. Personally, I consider it a hot hatch with the benefit of decent fuel economy and could care less what some magazine hack says or what Hyndai's intentions were. Why would they have installed larger brakes, a turbo, etc. if there wasn't some sort of intent to capture a part of that market. If not, then it's a clever ploy to get people like me to consider it over a car like the Mazdaspeed 3.
 
#44 · (Edited)
*decided to put elsewhere*
 
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