|
ok guys most if not all J30's came with 3.916 which rounds off to 3.92 gears . I have never heard or seen a J30 diff with 4.08 .
Ok now on to the Japanese side of things . CA18 powered cars supposedly came with lower gears than are in our cars here stateside.
NA SR cars came with 4.08 . S14 SRdet cars and S15 SRDET cars came with 3.70 gears just like the Z32 VG30DETT cars. I know this because I was researching it about a year ago. Now on the S13's it seems that some SRDET cars did come with 4.08's but there where also some that came with 3.70 gears. I think it all depended on the year.
FWIW if you are running a SR you are better off with a 3.92 or 3.70 gear rear end because it will indeed keep you in boost longer due to the fact that it takes a bit longer to rev through your gears.
Which means that though its taller you will still pick up acceleration due to being under boost longer.
this is why a NA Z32 diff has 4.08 gears like our car and the Z32 Turbo diff has 3.70 .
|