Rob how potent are the rx8 motors as compared to the rx7 motors?

Well as you can see in most pics the guys turf the RX8 Renesis engines and fit 13B engines like my series 6 has and take off the twin turbo and fit a big single turbo. The RX8 engine is highly expensive for many parts, it doesn't make turbo 13B power and it's unreliable unless you open it up at Rotrix and fit stronger seals etc but for less money you can take it out and fit the better turbo RX7 motor into the RX8. The RX8 is still a sexy car but due to there been no pillar inbetween the doors, it seems Mazda have strengthened the floor in the middle of the car to take the extra strain hence the car is somewhat heavier then the RX7. I'd say on average a stock RX8 motor without stronger seals etc... the high power has about a 80 - 100 000kms lifespan before it gives in and the low power goes to about 140 000kms and yes they break even if you do old lady driving with them. As far as RX7's are concerned, the weakest part of the 13b series 6 engine are the seals, if you upgrade them to 2mm seals at least then you've pretty much gotten yourself a bulletproof rotary, bulletproof as in a friend of mine has been boosting his 13b for the last two years and driving it quite "intensely" and all he's been doing at karels is his normal oil change services and the car is perfect. I've now also upgraded my seals to the 2mm seals(note there are 3mm seals available but that's just crazy) so my engine is now pretty much bulletproof and strong.

To answer LHD directly.... unfortunately the RX8 engine in South Africa isn't good, it seems it wasn't built to take the kind of mileage we do here or take our climate over long periods of time.

I'll get more pics when that RX8 is finished properly. The 20B Cosmo engine is a monster when played with, I'll try get some snaps of the RX7's currently getting the 20B transplants too. I was offered a 20B but I have issues with it been a everyday car like my 13B is going to be. There's a Renesis RX8 engine for sale on the mazdaownersclub.co.za for about R14000.00, look like I said they're not the strongest of the rotary bunch but are still capable of revving very high and sounding good and I think slightly modded you'll prob still push close to 200kws out of a renesis until it dies. A 13B like mine has with the turbos has a much much greater potential then the RX8 engine has and the 20B has a far greater potential then mine.... to put things into perspective for you the 13B is like an M3 or R8 V8 and the 20B is like a M5 or R8 V10 if you get my point

Hi guys. My RX8 just popped the motor, and i'm considering going with a 13B single turbo after reading this post. What's the approximate costs and parts required for the conversion. I will be doing labour myself.

Eew gross throw the SR20 into the scrapheap lol. It's possible to do the engine change but I recommend doing the 13B but the one with the single turbo due to the space even if you do my engine but then convert to single turbo for space reasons if I'm correct I commented in your other post to. I think if you pay somebody to do it it'll cost you like 40k or 50k in total for the conversion you're looking at to do it properly, perhaps if you do it yourself you can maybe drop the costs to like 35k for the whole conversion and a word of advice always get the rotary engine you're buying compression tested before you buy it plus it's recommended to change the seals from the get go to 2mm seals which alone can cost between 10 to 15k depending on the quality you go for, you'll be sorry if you don't insert the better 2mm seals. Also why do you think you're current engine has popped? Although seals on the RX8 Renesis are pretty expensive and never go to the Mazda dealerships cause they always tend to want to replace an engine merely for the reason that they do not know how to fix the engines themselves.

My theory about the RX8 Renesis engine is that they engineered the clearances so minimal that it has very little margin for error in that engine plus I feel that a thicker oil should be used in it and not the recommended oil that Mazda South Africa uses because the Hi Power has a lifespan of 80 to maybe 120000kms sadly, I use 15W40 Multigrade diesel oil by the way because it's alot thicker and the rotary engine eats oil but this oil seems to go alot further. I think seals for the RX8 Renesis engine come to 25k alone if I'm not mistaken and I'm pretty good at judging when a engine is about to have issues with the RX8 but alas many people don't notice the tell tale signs where if they did they'd be able to perhaps save the engine and a bit of cash before it went boom, oh and in a rotary the motor normally never goes boom it normally just splutters and struggles and smokes and then dies and never starts again if internal damage is too much after the seals have gone.

No normally what happens is the seals tear or break during revving if it's a sudden death which then cause the engine to lose combustion and oil immediatly and then tend to cause it to get too hot and the internals pretty much eat themselves up in that scenario. In the case of everyday seals going normally you notice a little smoke or hard starting etc and gradually the parts tend to eat at themselves but funny enough the 13B engine from the RX7 is very hardy and has thicker clearances etc so normally you can save the engine internals.... plus if you have 2mm or 3mm seals normally they never break even under heavy boost.

For a good condition 13B single turbo you're paying around 7k for the engine, 13B twin turbo about 12k for good condition one and 20B about 24k but all these engines are this price in stock used form hey.

Don't count Jdmmonkey out cause I hear Toyama is keen on making a ECU for the rotary for interested customers hey

hahaha funny lol