Quote:
Originally Posted by Top-Secret
so its just cheaper to go with the is300 then?
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Nope. I think he is thinking that you buy the IS300 pumpkin and direct swap it. However, IS300 final drive ratios for both LSD options are lower than ours, great for FI, terrible for NA. Going to a higher final drive ratio in NA will give you an acceleration boost (at least it will feel that way). You'll have to shift quicker, but it won't feel too bad and likely worth it. Obviously a turboed car would also benefit from the boost in acceleration, but again, you may hit the top end of your shift really quickly. This is something a lot of turboed people experience on even the stock 4.10 final drive, so they will go with a 3.7/3.9 that the IS300 has.
So if you are staying NA, taking your current car/pumpkin to a shop would be cheaper than buying a new pumpkin and having them rebuild it for you. Especially if they reuse the bearings on the current setup, which they should be able to.