48:11 ring and pinion gear

[MATT41178]

I have a ring and pinion gear with 48:11 stamped on it NIB,I havent put this on my car because I dont know what it will do I dont know much about diffs can anyone help?

[naed240sx]

so it is a 4.36:1 ratio. Commonly found in r32 skylines, and compatible with silvia diffs. Stock ratio is 4.08:1. Installation of that gearing will cause your driveshaft to spin at a higher rate than stock at any given speed. This will effectively shorten all of your gear ratios, and help out with acceleration a lot(unless your car makes a ton of power). You will lose some top end though. For the ka, or mildly modded sr20, this is genererally a great mod, but If your car is making a lot of power, then your will be spinning your tires way too often. Seach for more info.

[MATT41178]

Well I am running about 275-300 now, but its real slow untill boost (4500- RPM)

Do you think it will be good on my set up ?

[naed240sx]

Well I am running about 275-300 now, but its real slow untill boost (4500- RPM)

Do you think it will be good on my set up ?

Wow sounds nice. My personal advice would be not to use it, unless you feel like your car has more grip than it needs at the moment. You could pull it off If you ran some really sticky tires, but If not, I don't suggest it, because you will have a really short first gear, and will probably spin all the way through. Hell, my car gets through first gear faster than any car ive ever been in, and it has an old ka. Im running a 4.4. I think the 4.08 would be the best for your car. Some would opt for something like a 3.9. Its all kinda up to you, and what size, type of tires you are running.

[MATT41178]

the diff I have right now is from a canadian 240sx VLSD Tires are 17" yokohama av es 100.

[naed240sx]

Yeah I would say stick with the stock gearing. It will be a little more work, but you can swap the stock ring over to the lsd. You are making some good #s and don't want to be having all kinds of traction issues. Just my opinion though.