lostprophet

Hey im new to rx7's and rotary engines and infact dont know much about drifting or engine swaps. im wanting to put a new engine in my 88 rx7 non turbo and was looking for some information on what rotary engine would be best suited for drifting and any other information that ppl could give me. im continually looking at forums and trying to find as much information as i can but figured if i make a post i can get some solid feedback. thanks to anyone who replies.

mazdaspeed7

The engine choice option is more a question of what level of prep and power you want. The blocks are pretty similar, with just a few improvements here and there. Generally, the newer the block, the stronger it is, and the less work it will take to make it reliable at a given hp level. But below 350-400 whp, even the s4 turbo block is perfectly adequate with just some basic prep and oiling mods. How much power do you want? Power is cheap, reliability with power is not.



Personally, I recommend the 13B-REW motor form the 3rd gen rx7. It is the strongest block, and has the best oiling system. It will bolt into an fc chassis with a set of mounts(which I sell, click on my sig for details). My swap

lostprophet

well im looking for a fair amount of power id like to be fast on the straights at the same time but like i said i dont know much how much would you recommend for drifting. whats the diffrence between the s4 block and the 13b rew? and if i put one in my car you got yourself a deal on the mounts ha

mazdaspeed7

The REW block came out of Mazda's flagship sports car. The block has been reinforced in the areas that are prone to cracking on the earlier ones(usually caused by detonation and/or high hp). The spark plug locations are changed a little for increased knock resistance. The oiling system is greatly improved. The pump was redesigned for higher flow and pressure, the standard oil pressure is 100 psi instead of 60 psi for the earlier blocks. The main bearings are windowed and the stationary gears are grooved so oil can flow behind the bearing, and enter at a full 360 degrees around the bearing. The thrust bearings are larger and stronger. The machining process on the rotors is more accurate on the REW. The oil pan has a built-in baffle. The intake ports are rather large, while the runners are smaller than the RE, for improved velocity at the port. The runners are also angled up to allow for more turbo clearance and less of a sharp turn at the block to manifold interface.



Its all little things, but many of the things that come standard on the REW block is what builders have been doing to the earlier blocks to make them more reliable and make more power. The better of a block you start with, the less work you have to do to it.