2004 or 2010? Also porting.

[Sephitrask]

Originally Posted by LiveWire

Thanks j9fd3s, very useful info and right to the point. I heard a lot of good things about turblown turbos, such as that they can get a stock rx8 13b up to 400+ hp with relatively lower boost levels. My goal is probably something modest, around 330 hp and 270 ft lbs of torque without extra systems like meth injection. Is this do-able keeping reliability intact for a dd vehicle?

So, after re reading this thread, I am wondering, have you actually bought an rx8 yet?

On turbo'ing the renesis, 400+ is a very lofty goal. I have seen people extensively mod their car, only to obtain right at 300 hp. There are some new kits out claiming 400+, but I am very skeptical of it, especially on a stock motor. The stock motor just doesn't handle boost very well. The biggest issue, aside from poor build quality, as stated above, is the side port exhaust. On your previous rotary engines, the exhaust was very free flowing, with the exhaust simply being pushed out the rotor housing. Hell, if you blow an apex seal on one of those it will eventually get tossed out too. Not so with the renesis. For the exhaust, it has to make a 90 degree turn into the side iron, then another 90 out to the exhaust manifold. Because of that, you have ALOT more heat buildup in the engine. The renesis exhaust gas temps are 2 to 4 hundred degrees cooler than the rew; thats because the heat is sitting in the side irons instead of flowing freely out. oh, and if you loose an apex seal, its just gonna get bounced around inside of the housing, destroying everything in its path.

Now dont get me wrong, I LOVE the rx8. I have one, and NEVER regret buying it. Just keep in mind that if you are looking for 400+ Hp out of it, its a long hard road ahead for you, that may not have a happy ending at the end. Most people I am aware of gave up on the renesis and went RE, REW, or 20b. I know a guy named Steve in Melbourne that has a REW in his 8, and it was a relatively straight forward swap, all things considered. It WAS expensive though.