[ZZEdwardZZ]

Hey, I was wondering how much Horsepower/Torqu the following two rear differentials can hold safely.

-3.56 (r200) out of a 1975 280 MT
-3.36 (r180) out of a 1972 240 MT

what one would you guys pick?

thanks a lot

Ed

 

[Stingray280zx]

R200 can handle anything up to 500 or more, i can't remember 500 or 600, but it can handle it easily. Now as for the R180, i think its around 250-300, but i could be wrong. The R200 is a strong ass Differential, i should put one in my 280zx, for some reason it has a R180....

-Emir

 

[ZAGAIN]

An r200 can easily handle 400hp. Unless you are running a high-po v8, you'll be safe with it. If you are modifiying your engine for high horsepower, get rid of the r180, replace it with the r200, you'll be glad you did it.

 

[Tony D]

Electromotive 600hp...

They ran the R200 in endurance racing with well over 600HP in Turbo Z's. The R200 is rock solid. My buddy with the 502 Caddy engine runs 11.26 in his 280 with the R200 and some meaty slicks. The weak spot is the U-Joints, that's why so many dragracers go to the CV joints.
My buddy eventually changed over to a Corvette diff in his car for a different gear selection at a reasonable price. He put that R200 into his 240 that Ran 12's with a single suck-through holley turbo setup on a stock L28ET block. Was still going strong when he sold it to a Japanese guy who shipped it to the "homeland"...