philodox

Yeah, i've been MIA for quite a while. Hope to have that fixed now :p

Hmm.. i'm pusing 11700k miles on my 8.. think I put the turbo in around 5k miles.. so figure 6500-7k miles on my turbo kit so far. Car is still going very strong. My one concern was my stock clutch, but it takes a lickin and keeps on tickin like it was brand spanking new! It's wild, because I am definately not soft on it.

mike1324a

Thats good news. Its good to know that the clutch can hold up.

RX8PDX

Philodox - what electronics are you using for the kit?

And the other question I have, I am kinda new to cars and such, but I have always heard that RX7's were some of the fastest cars out there.

Maybe it was just all rumor, but I would think if the 7 can get fast, theres no reason the 8 cant.

Pretty close to the same engine, but some improvements. Though I hear the exhaust ports are hindering turbos?

philodox

Aside from the emanage that came with the Greddy kit, I am using a defi gauge controller & greddy boost controller. Pretty simple.. Not really a need for a turbo timer since the 8's ignition is a tricky beast all on it's own. After running it hard I just let it idle for about a minute to cool off a bit.

As far as your other questions, check the major horsepower upgrades forum section of this site. You'll find all your answers there.

rotarygod

Rant begins:

Why do people always need untrustworthy dyno numbers for proof? If I haven't seen it, it doesn't exist or isn't possible is just a load of crap.

First off the 13B rotary was capable of insanely high numbers when tuned properly. That's the key. Many people have blown them up at 300 hp. That must mean that more isn't possible. However there have been over 700 hp 13B's out there. It's all in the tuning.

The RX-8 has suffered a similar fate up to this point. The most widely known turbo kit is Greddy and they used a pathetically small turbo (although it is great for daily street driving), and an engine management system that is approaching worthless on this particular car. You won't see high numbers from the stock Greddy kit. 300 is about the limit and that is with great tuning. It will take a compressor upgrade to go farther. This is still plenty for most people. It is straight forward to install and spools up quick. It's nice for what it is designed to do and that isn't insanely high numbers. Nothing wrong with that though.

We just recently had a nice ecu option come out from Mazsport. You can finally tune the engine properly. The problem is that most people don't want to take their cars apart, and modify them beyond all belief. For many people this is a daily driver. Alot are concerned with their warranty and don't want to lose it. This is a more grown up civilized sports car. Many RX-7's are not daily driven. They are all out of warranty and there are a nearly infinite number of aftermarket parts available for them. When the 3rd gen RX-7's first came out, for the first few years mods were sporadic and this is with a turbocharged vehicle. Many of those people didn't want to lose their warranty either. IT was only after a few years that we started seeing some really big gains from them. Of course the 90's were a huge time for the advancement of truly programmable standalone engine management systems as well so that had alot to do with it. The piggyback units for that car at the time weren't the best thing when shooting for high horsepower numbers.

The Renesis isn't so different from the 13B that it can't make alot of horsepower. I won't believe that for a second. It should easily be capable of nearly as much. It already makes more power than the base 13B engines that we all know so well. That is far less distance to make up. The compression ratio argument for power is pure crap. Learn how to tune better. There is ultimately a point where a lower ratio is better, but it is high enough that the car could be extremely fast when it gets to that point. The Renesis seals are also stronger than the 13B seals. People think because they aren't as tall that they must be weaker. First of all they don't flex when crossing over a peripheral exhaust port. Alot of stress comes from this. Next the 13B seals were a 3 piece design. This means that although the total apex seal groove was deeper, the seals were half as tall as 2 pieces stacked up on each other with a small corner piece on the end. The Renesis uses a 2 piece seal with the small corner area. The main piece is thicker than the upper half of the older seal and it's a stronger material. It will take more load and is less inclined to suffer from rollover. The aftermarket does have 1 and 2 piece seals and 3 mm versions for the 13B engines. These can be made to work in a Renesis with some rotor modification. Ari at Rotary Performance had over 620+ rwhp with a completly stock Mazda factory rebuilt 13B though so it's more tuning than anything.

The person that truly wants some serious power is delerious if they think they will just buy some bolt on plug and play kit. All of the truly fast rotaries in the world have some degree of custom work done to get them to that point. You don't just bolt on a turbo to a nonturbo car and plug in an ecu and expect to be fast. You will get faster though.

300 hp on a Renesis? Easy. Simple. Big deal. No problem. My top number guess for this engine completely stock with stock seals on 93 octane properly tuned would have to be at least 400 rwhp. It might be capable of more and I hope that it is but I would hope that someone would do some internal work to the engine if they wanted that. This car can most certainly be made fast. If a Civic can be made to do it, so can a car that started out at a much higher level to begin with.

Rant over.

RotaryManiac

rg speaks again lol. i want your knowledge

Jaguar_MBA

Preach it brother, Preach it.

mike1324a

Thank you Rotarygod!

OfficerFarva

Rotary God, I just wanna thank you so much for stating that in the most awesome of ways. I hate it when people talk **** to me about my car. I try to communicate everything u just said back to them but i don't think their brain capacity break down all of that. The other day, this red neck in a crx with old paint and shitty underglow was talking to me about how my car was "slow as poop". And then he went on to say how his car at 9500 rpm sounded like a motorcycle. Unfortunately for him, it probably would blow up like an m-80 if ever taken that high. In a round about way, I hope that one day u can enlighten all of those unfortunate souls like him that are ever so abundant in our world.

rotarygod

An even more sad fact is that the people that always say something is impossible are also people that have never tried for themselves and never will.

StealthFox

"300 hp on a Renesis? Easy. Simple. Big deal. No problem. "

...um, when was the last time you made a 300 horsepower renesis?


not to criticize, but that is certainly not the case now.


in a few years 300hp will be peanuts for this car, im going to basically be following up with this car untill i reach a 500hp goal(this is obviously with engine work) and for now about 325 horsepower.

rotarygod

300 hp is already peanuts for this car with forced induction. 300 isn't hard to hit with a turbo on my little 127 hp Civic engine. 300 hp is EASY on a rotary! When people use turbos that can't flow that much and combine them with ecu's that can't be tuned that well, then it isn't easy. Right tool for the right job. Use the right turbo and tune it properly, the engine is quite capable of doing it. There is no lack of technology right now that will make it easier in a few years. We can already do it. People have. The one thing we will have a lack of in the future is warranties. As I said alot of people don't want to do that to their cars. Personally I think 400 can be had on the stock block Renesis right now if someone wants to do it. When was the last time I made a 300 hp Renesis? This sounds like some typical 7club answer to horsepower claims asking for a dyno chart to prove it. When was the last time you did? If you haven't you have no more right to say it can't be done. Prove it. You have an RX-8. Who better to try? I've personally made a 425 hp 13B. Lots of people have. Could have gone more but didn't want to push it too hard. It's basically the same engine and not so much different that we can't still make good power. The Renesis is a more advanced engine with stronger seals. That's already an advantage. If an inferior lower powered rotary such as a 13B can do it, the Renesis can too. Why are you going to wait to attempt 500 hp? Why not just try it now? You can already do 325 with currently available kits which is why I say 300 is easy. It's been done! That pretty much proves my statement. What kind of technology are you waiting for? Are you just waiting for someone else to do it so you can benefit from their success, time, and effort? The more people that actually do things themselves, the faster everyone will benefit.

StealthFox

i AM going to try but if i've talked to at least a few people running 400hp on a stock block renesis without problem i certainly would make sure my fueling was up to par and get to tuning and boost. for now it seems like 300hp is an acheivement which is sort of sad considering its such a nice car.

and right now im going to be running a t4 .62 which is capable of probably 400. the turbo is plenty capable its a matter of if i have the ***** to use more of the turbo's potential. im a bit timid because im not mechanically inclined and just want some assurance that other people are doing this fine without problem.

im busy tooling my turbo 2 right now for my power fix so i can wait. and you need to open up a shop rotary god.