I'm running a welded diff in my ITA crx right now and enjoying it, but looking at other options. Some of the recent LSD talk is saying that the common LSD's don't lock as much as they might.
Being able to turn easily in the pits would be nice, but not at the expense of cornering performance.

I understand that a spool is essentially doing the exact same thing as a welded OEM diff

I looked around briefly and the drag race guys use spools which are minimalist and very lightweight compared to a welded OEm diff. Is this rotating mass significant enough to make any difference?

Also, I couldn't seem to find any listings for d-series spools, only stuff for b motors. Are there any d-series spools commonly available?

 

What LSD Talk?

spools are good for reducing rotating mass.. I'm SO temped just to try one..

 

Less mass is always a good thing but will you be able to measure the difference? Hard to say.

K

 

We were just talking about spools over on d-series.org

Nobody knows who makes a spool for the d series, but they can confirm that Bisimoto used one in his d series drag car.

I would like to know the results too.

So you like the welded diff?

 

I'd guess it's less critical in a honda than in my old RWD toyota. In my case, it's all unsprung mass, in your case, not so.

Regardless, the diff carrier is similar in diameter to a crank pulley (close enough). Does anyone feel the difference between a lightweight pulley and a factory cast iron unit?

I'd think it's worth trying.

Scott

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jisu009 &raquo;</TD></TR><TR><TD CLASS="quote">We were just talking about spools over on d-series.org

Nobody knows who makes a spool for the d series, but they can confirm that Bisimoto used one in his d series drag car.

I would like to know the results too.

So you like the welded diff?</TD></TR></TABLE>

hmm maybe I'll have to try to get ahold of bisi to find out if it was a one-off spool or if someone is making them.

On the track, I really like the welded diff. As you'd expect, the car pulls like nuts around corners. The thing is, you have to realize that cornering is a million times easier when you're on the throttle. The car actually pulls itself through the corner, very point and shoot. If your rear end starts to get a bit wobbly, you can steer where you want to go, mash the go-pedal, and it'll pull you out.
Tight maneuvering in the pits is a bit of a pain, when off the throttle, but I've found it livable, though annoying. I have driven the car a few times on the street like that, it's just more of the same.
The braking is where it really shines. It is literally impossible to lock up one wheel. But you have to do your braking in a straight line, otherwise it will pull a bit.
Also you have to be careful for axles. I cracked a joint on my first time out with it, because I had a spin, and turned the wheel full lock and pinned it. I've been careful about it since then, and haven't had trouble. I do keep extra axles at the track though!

I autocrossed the car once this summer too, and it wasn't all that bad. Definitely not even close to as fast as it should be, but it wasn't unmanageable.

I've been toying with the idea of changing to an LSD for '06 but I may stick with the welded diff and just add a 4.9 FD