Anyone knows what does NA engine and LSD mean and stand for? - Toyota Nation Forum : Toyota Car and Truck Forums

NewRacer · 01-27-2004, 05:30 PM

Anyone knows what does NA engine and LSD mean and stand for?

brink · 01-27-2004, 05:38 PM

Naturally Aspirated
Limited Slip Differential

I know it took me a long time to pick some of these acronyms up.

Some other ones you'll run across
FI = forced induction
FF/FR = (referring to engine placement/drive wheels) engine in front, front wheel drive/engine in front, rear wheel drive
WOT = wide open throttle
NOT = normal operating temperature
LFB = left foot braking

hrm, can't think of any others off the top of my head.

NewRacer · 01-27-2004, 05:46 PM

Thanks for your reply.

Do you know what does Limited Slip Differential do? It's usually
put in RWF car. I have a FWD car, so anyone knows what is it
used for?

One more thing, do you know if doing left foot braking in FWD
car or any other car, would damage the brake?

Thanks.

brink · 01-27-2004, 05:56 PM

For the LSD thing, it puts equal power to the wheels, rather than an open diff (what the average car has) which varies its power to either wheel. It's useful in FWD cars as well as RWD, though how much so is debateable I suppose. There are better descriptions on here by people more knowledgeable than I. Do a search and you'll find some great topics.

For the LFB thing, it's not going to "damage" your brake... it's using your brakes more than what you normall would, so more it's going to wear them out rather than hurt them.

Unless you just mash on the brakes all the time and warp your rotors I guess.

***Phi*** · 01-27-2004, 06:12 PM

Quote:

Originally posted by brink
hrm, can't think of any others off the top of my head.

The most feared automotive acrynom..CEL= Check Engine Light

wedge · 01-27-2004, 06:27 PM

Technically, an LSD doesn't put EQUAL power to both wheels. An LSD will give the most power to the wheel which IS NOT slipping. Where an Open Diff will put the most power to the wheel which IS slipping. There's also such thing as a locked diff, which will put equal power to both wheels all the time, no matter what. Then we get into Active Diff's, which only exist in racing cars, and I'm not going to getting into such complexity here.

andyman61 · 01-27-2004, 07:14 PM

diff's are one of the most complicated parts of a car and something not a lot of people understand, or at least i don't totally understand them. how stuff works has quite an extensive section on them with some good illustrations, but i still don't get it totally.

nort0188 · 02-02-2004, 02:23 PM

Quote:

Originally posted by Phi
The most feared automotive acrynom..CEL= Check Engine Light

And on the other end of the spectrum, the most loved... FMIC = Front Mount Intercooler

Remembered some more:
FF - Front engine, front drive
FR - Front engine, rear drive
MR - Mid engine, rear drive

Timberland · 02-02-2004, 02:45 PM

What does "WW" stand for on the threads with risque content? I can't figure it out and I know its so simple.

brink · 02-02-2004, 03:50 PM

Work Warning.
Also, NSFW = Not Safe For Work

Timberland · 02-02-2004, 03:56 PM

See, so simple. But I could no figure that out for the life of me. Thanks.

alltrac165 · 02-02-2004, 08:55 PM

I thought LSD was a hallucinagenic?
To expand on Wedge's answer, an LSD, or "LIMITED" Slip Differential does just that. It limits the amount of slip between the drive wheels. There are several ways to accomplish this, but probably most common is through a set of clutches. Both drive wheels will try to turn at the same rate until the amount of force is great enough between them that they will slip and one wheel can then turn faster than the other. The force required to cause slippage can be varied by design. Only as much power can go to the wheel with traction as the clutches will allow. Above that, it slips. There are others, such as Lockers which have several designs unto themselves, and the Torsen type which can actually apply more torque to the tire with better traction unless one wheel looses traction completely then you are stranded. Howstuffworks.com can help you out with the basics if you are interested.

white90dx · 02-03-2004, 05:17 PM

Please read the automotive section of www.howstuffworks.com.

-Charlie

Taco30 · 02-23-2004, 03:47 AM

Yea, that's what I was just about to say, a limited slip will apply some torque to the non slipping wheel but definitely not most of the torque, but in a front wheel drive car, this one would probably be best traction adding diff, so you don't lose too much of your turning/cornering abilities.

Also, on the torsen type diff, I've read somewhere that if one wheel does in fact lose total traction, you can press on the brakes to simulate torque which will allow power to go to the other wheel...

Nick · 02-23-2004, 10:16 AM

anyone know how the "cam type LSD" for the front of the wrx sti works?