I need to buy a new engine for my swapped- but- not -yet-driven 1st gen RX7..I installed an S4 TII engine that had blown oil seals, and now I need another to get it running finally. I have an S5 turbo and manifold I bought to install when I thought it was the turbo that was bad, but later I found out that it was not the case. Now I just need to decide if I should go with the S4 or S5 engine. I already have the turbo and manifold, but I may upgrade to a larger turbo in the near future after it is all sorted out, and I want the engine that will be better in the long run in case I decide to upgrade. I don't plan on running big boost but I'd like to be in the 300-350WHP area..I would also have all supporting modifications for the larger turbo..Just wondering what the pro's and con's are of each engine, and if the S5 is worth the extra $$ to me..I should also add, I won't be buying a brand new engine, it will be used and most likely a JDM engine..Thanks for any tips.

 

anyone?

 

J-Spec engines are a crap shot.

http://www.fc3spro.com/TECH/FAQ/ZVK/zvk.html


-Ted