Guest Anonymous Posted August 10, 2002 Share Posted August 10, 2002 Last week, my bother in Law was tring to help me out in rebuilding my 76 28L..I've replaced the motor with a 280zx FI non-turbo and 5 speed trans and now was the time to pull the 3.54 rear end... Ok..now the problem...He droped off 6 rear ends in the garage..after opening them up and finding 39:10 stamped on the rings (3.9 rear), But one stood by itself, in the far corner. it had a stamp of 39:11 on it's ring...what is it? is it better then the 39:10? Thanks.... Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted August 10, 2002 Share Posted August 10, 2002 39 / 11 = 3.54 its a pretty common ratio and might work ok for you. I'm not sure on turbo cars (which I think can use a bit taller gearing because of the added midrange torque), on N/A cars most seem to feel the 3.90's give more off the line quickness. *shrug* I'm not sure how they feel about 3.90's in a turbo car. I'm not sure one is better than another, just geared a bit different, the 3.54 will give more top end for sure. Regards, Lone Quote Link to comment Share on other sites More sharing options...
Mike C Posted August 11, 2002 Share Posted August 11, 2002 The consensus with people I have talked to is that the turbo prefers the smaller numeric gearset since it increases the load on the engine which makes boost. Quote Link to comment Share on other sites More sharing options...
R0N Posted August 11, 2002 Share Posted August 11, 2002 Originally posted by LoneInAZ:39 / 11 = 3.54 its a pretty common ratio and might work ok for you. I'm not sure on turbo cars (which I think can use a bit taller gearing because of the added midrange torque), on N/A cars most seem to feel the 3.90's give more off the line quickness. *shrug* I'm not sure how they feel about 3.90's in a turbo car. I'm not sure one is better than another, just geared a bit different, the 3.54 will give more top end for sure. Regards, Lone Lone, I have a turbocharge Z; if I had a choice I go with the 3.54. I wouldn't want to waste the torque the turbo gives with the short revs. Quote Link to comment Share on other sites More sharing options...
Guest Aaron Posted August 12, 2002 Share Posted August 12, 2002 The 280ZXT's came with the 3.54 gear. With the torque of the GN setup, Scottie is using a 3.07 in his corvette rear (if memory serves). I would use the 3.54. Quote Link to comment Share on other sites More sharing options...
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