I am curious about my 2001 type r LSD (limited slip differential). I thought that if you had one tire on ice and the other on dry pavement, torque would go to the gripping wheel. Tried that, guess what, the ice tire still spins, car moves forward a little, did not hook up that much. Did this on both sides. Called the Honda performance people near where I live and they say the stock LSDs suck, only transferring about 30% of torque to the gripping wheel. I got the same answer from Kaaz. Is this true or are they simply trying to sell me an aftermarket differential? What is a good road test to test the stock LSD?

 

well, thats easy.
go test drive a friends GSR or LS around some tigh tcorners or even better an autocross course.
The take your ITR around the same setups.

with the LSD your car should pull harder out of the corners, and feel more solid (heh heh, more, yah like the gsr or ls even feel any bit solid in comparison, hehehhehehaaa!)

um, yeah.

 

Yeah, stock LSD isnt that great for that kind of situation.
Quaife should be better all around.

 

Both the stock lsd and the quaife lsd are helical diffs. In the situation you stated above with the wheel on ice and the wheel on clean pavement; you stated that the stock type r lsd did not transfer power effectively. In a helical diff the sun and planet gears are smashed together, but this only happens if there is enough resistance. The scenario you depicted would probably not create enough resistance for the sun and planet gears to be shoved into the ends of their housings. (SCC Project Silvia Part III) This would be the same for both differentials because of they are the same type of differential with some different nuances.
By the way, your car is still biased to spin the inside tire when powering out of a corner because the inside tire has less vertical load and therefore the tire has less available grip on the inside than it has on the outside. Differentials do not put more than fifty percent of the power to the wheel with more grip, they simply divide the power equally between the two driven wheels.

P.S. Dave Coleman is the Car God

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ftrauto-xek &raquo;</TD></TR><TR><TD CLASS="quote">Both the stock lsd and the quaife lsd are helical diffs. In the situation you stated above with the wheel on ice and the wheel on clean pavement; you stated that the stock type r lsd did not transfer power effectively. In a helical diff the sun and planet gears are smashed together, but this only happens if there is enough resistance. The scenario you depicted would probably not create enough resistance for the sun and planet gears to be shoved into the ends of their housings. (SCC Project Silvia Part III) This would be the same for both differentials because of they are the same type of differential with some different nuances.
By the way, your car is still biased to spin the inside tire when powering out of a corner because the inside tire has less vertical load and therefore the tire has less available grip on the inside than it has on the outside. Differentials do not put more than fifty percent of the power to the wheel with more grip, they simply divide the power equally between the two driven wheels.
</TD></TR></TABLE>

Very well put, finally someone who understands diffs. So what exactly is the difference between the LS/GSR and TypeR differentials?

I have seen a variation of the Helical LSD with clutches that eliminates the inside tire bias. The clutch will slip to make sure power is distributed evenly on both sides, based on vertical load. Seems to fix the ice scenario, but doesn't this result in drivetrain loss?

 

quaife is good...i like the gear type over clutch type

 

GSR and LS come with open differentials which basically just let the power to the wheel with the least resistance. (E.G. 1. burn out and you will probably have two makes, but one will be much longer than the other. 2. Power out of a corner with an open diff and basically all of the power is going to go to the inside wheel, causing the car to be able to power out of the corner, turn-in crisply, and will be prone to understeer.
The clutch type diff is not necessarily a variation of the helical diff, but actually a variation of the entire lsd. The ice problem would be fixed, but unless you race your honda on ice then this isn't a huge problem. Definetely will anything less than 300-350whp I would go will a helical diff. More than that you should probably think about the clutch type.

 

Let me make it even simpler. http://www.sportcompactcarweb.com go to the project cars and just read the articles that they put in lsd into their project cars. That should pretty much cover any questions that have regarding the different types of diffs.

 

holy 3 year bump

 

well put ftrauto-xek