dannobre

iTrader: (3)

For the amount of money any of that stuff is goiing to cost you need to do a lot of research

Last sequential I looked at was in the $20K range ...the RX-8 would use RX-7 options with small modifications

The 3 rotor swap is being done...but in the $30+ K range for a shop....not sure why you would need it..you can get 550 out of a REW.

Suspension can vary from about 2.5K to 10K depending on your tastes

You will need to be more specific if you expect to get any useful help

Team Tora Productions

Where are you finding the places to do all this work? I can't find anyone at all along the west coast. Am I not searching the correct terms or something?

And how can I get 550 hp? The only way I know is with PETIT racing (they claim only 480hp) and they quoted over 22k because they had to rebuild it, install a super charger, and reinforce the exhaust ports (why they can't put a turbo instead of a super charger has not been adequately answered when I asked them).

Can you give me recommendations on suspension, locations for 3-rotor, etc? Honestly, I was mulling around the idea of buying my buddy's FD for 8k and fixing that up instead of spending 25k+ to get the RX8 race ready, and then I would just switch groups at the track.

poacherinthezoo

Suspension: Talk to Shaikh, at Fat Cat Motor Sports Automotive Suspension Experts | Fat Cat Motorsports | Serious Engineering, Serious Fun! - he can get you set up with custom valved shocks and spring rates/bump stops/etc to match your specific desires. From my personal experience with Fat Cat Motor Sports, I would be hard-pressed to go anywhere else for my suspension needs.

Power: Turbocharging has been done (extensively) on RX8s (search for various threads: https://www.rx8club.com/series-i-maj...r-upgrades-93/). As to why a specific shop prefers supercharge/turbocharger over the other is likely due to personal opinions, available parts and politics.

I'm not sure what you plan on doing with your car/what kind of racing and class system you've got in mind, but it may be cheaper to get the RX7 and prep it to race (depending on what it's current condition is) than prepping the RX8.

A few shops that may be worth looking into (for RX7 and RX8 engines built for race applications):

Pineapple Racing: Pineapple Racing
Black Halo Racing: Black Halo Racing
Atkins Rotary: Atkins Rotary - Rx7 | Rx8 | Mazda | Rotary | Engine | Parts

*N.B. I cannot say that any of the aforementioned shops are "the best" or "better than shop X" because I have no personal experience with buying/rebuilding an engine to race spec with ANY of them.

Other threads that may be informative:
https://www.rx8club.com/frankenstein...w-swap-249808/

kallenthe8

Hey guys I've bn looking into turboing my 8 ... I've read a lot on many diffrent Things that go into turboing the car ... Upgraded cooling sys.. New clutch/fly wheel... new drive shaft .... Oil catch can ..can u guys give me. Opinions on if I truly need some of this stuff ... Like the oil catch can ... I've read ALOT. Of stuff on that damn oil catch can and haven't gotten. A good Anwar yet ;/... Just looking for opinions and pointers is all thanks fellas

Rx8 Dave

Well, no one apparently wanted to take this on (though there is help for those wondering about using their air conditioner). However, with more digging, I found a couple of good discussions for those curious about coolant at https://www.rx8club.com/series-i-tec...licone-238638/ and PEAK Global lifetime & PEAK Extended life revealed | Cooling System Fluids & Additives | Bob Is The Oil Guy. I hope the conclusions still hold true.

paimon.soror

iTrader: (15)

Kallen;

Unfortunately the catch can is the absolute 150% least of your problems when even muttering the words 'turbo' and 'rx8' in the same sentence. I suggest that you do some digging around in the following forum to start piecing together some useful information on what is going to be required of a rx8 that intends to be boosted.

Series I Major Horsepower Upgrades - RX8Club.com

kallenthe8

I all ready know the catch can isn't that important that was just an example ... I know there's a lot of knowledgeable folks on this particular thread all the time... Like RIWWP and a few others ... And after sifting threw all the theorys of every single know it all I'm more confused than when I started... So I was hopeing to get 1 of there opinions on if it is worth the time and money 2 do

Rx8 Dave

Kallen, I have a catch can that I vented myself so it doesn't connect back to the intake, but only have it because I just don't like my intake sucking oil overflow/oil vapors from the oil fill tube into the throttle body, manifolds, onto the SSV, etc.. It doesn't seem to me to be necessary with a FI (turbo) or even a NA (naturally aspirated) engine unless you want one for those reasons, and some think its not needed at all without or without a turbo. I suppose some may think the FI will suck in more oil/vapors than a NA and that's why they recommend it, but I don't know that it's that big of a deal. On the other hand, it's a cheap, easy to install mod. If you add it, just make sure the can is vented or has a insert to condense oil and vapors that keeps it from just being a longer path of the oil/vapors back to the intake. There are discussions and DIY's on catch cans on this forum.

poacherinthezoo

The answers to almost all of the questions is dependent on how much boost you intend on running (and how much power you want to put down).

Rx8 Dave

Maybe Godfather, et. al. will float down from on high and give you some advice, Kallen. I do not believe that a new clutch/fly wheel or new drive shaft are necessary; I think those are mentioned out of an abundance of caution because of a belief that the FI creates more engine strain. If your tran and engine are in good shape it should be able to handle the FI. Of course, there is the time and expense, debate whether to use a turbo or supercharger, amount of boost, whether the amount of hp gain is worth it, etc. You might want to check around your area for those mechanics knowledgeable about FI and the Rx8 as well as the threads the Maude Rater recommended.

kallenthe8

Thanks ... I have a hard time putting my thoughts into words sometimes and what I was trying to ask about the oil catch can is I've read that adding the oil catch can stops the dirty oil vapors and stuff from getting into the engine ...but at the same time I've read that the rotory needs those fumes and exses oil blow by or what not to lubricate it some ?? ... Is what the engine puts in itself enough lub itself without those fumes..... I think u answered that question for me David.... But will some of the other things like if I really need a new drive shaft and clutch/ flywheel if I'm only going up like 50 hp ??? I've heard yes and no : / with ur experiances would u advise getting. Then ?? :/

Williard

iTrader: (18)

Kallen,

There are several threads dedicated to FI. There really is a lot of good information on this site.

Here are a few.
https://www.rx8club.com/series-i-maj...thread-214417/

https://www.rx8club.com/series-i-maj...itrous-122645/

All threads dedicated to things like this can be found here.
Series I Major Horsepower Upgrades - RX8Club.com

Replacing the clutch and flywheel will really depend on what kind of power you are trying to produce. The stock clutch set up can handle more power than the NA Renesis can put out. What you have to keep in mind is the more power you add, the harder it is for the stock parts to handle. That goes with the clutch, injectors, flywheel etc..


So it all really depends on what YOUR goals are.

badinfluence

I have a basic/advanced question.

On Rotary Mazdas (FC,FD,RX8 S1, & S2) is the fuel pump controlled by Duty Cycle (PWM), or is it just a relay on or off? I am mostly interested in the FC and S2 RX8.

Rx8 Dave

Ditto to everything Willard wrote, above, Kallen ^^. Also, remembering that the standard Renesis puts out around 197 hp and the high power engine puts out about 238 hp, 50 extra hp is a significant gain -so updating mechanicals might need to be considered if you plan to primarily race the car. However, if it's your everyday ride, and you only beat it badly occasionally, not so much. Read all about it, and if you're still in a quandary, come back to this thread. Good hunting.

Rx8 Dave

I know diddly about Pulse Width Modulation, etc. I don't know if this helps, but for the S1 the pump is controlled through the PCM in two steps - the two relays in the main fuse box providing two-stage current - one stage (for the engine in low load, start-up, and idle (on the "CIRCUIT" relay)(basic pressure) and the other stage for the high engine loads (when secondary injectors kick in) (on the "FUEL" relay)(higher pressure). The highest allowable pressure is regulated by the fuel filter and when the pressure inside the filter exceeds the filter setting, fuel is sent back to the fuel bowl for future pick up. I don't know, but it sounds like a "relay on or off." Maybe the attachment will help. Others will have to give their opinions on the other rotary series.

CRO8TIA

And the fuel filter is where ?

Grace_Excel

iTrader: (5)

If you have the time to read, we have a DIY for that: DIY Clean the In-tank Sock Filter. It may be a weekend job for you knowing that you will need the special tool. Nevertheless, it's a good read if you just want to clean the filter instead.

CRO8TIA

Thank you,I know what and where the fuel pump sock is, Rx8Dave stated there is a filter, to the uninitiated, there may be some confusion to those who assume there is a separate fuel filter as in most vehicles.

wdrisley

where do u find this fl 88 engine coolant for 05 rx8 and is there a adiquate replacement

Legot

iTrader: (1)

Thanks!

Another question.

I've done a stupid thing and ordered the wrong replacement radiator for my 8. It's still for an Rx8, so it will fit, but it's an AT radiator (with the oil cooler built in) and I have an MT car (already has two coolers).

Do I send it back and wait another week for the right radiator, or do I put it in? If I put it in, would it be wise to include the radiator's oil cooler in the stock oil system at the expense of a bit of oil pressure, or would it decrease it too much?

One option I'm tempted to go with is to install it, include the rad's oil cooler in the system (now or at a later date), and do an oil pressure regulator upgrade to bring back whatever pressure is taken away from the extra cooler.

badinfluence

That answered it. I figured PWM was too complicated and to much for a basic ECU.

I was asking because if you replace the pump with a higher flowing one, I was trying to figure out how the ECU doesn't choke itself or blow something off because the injectors only inject so much.

Do you have to increase the re-circulation valve if you upgrade a pump? (In general)

CRO8TIA

Legot, An Automatic radiator cools the transmission fluid, not the engine oil.

Dustintomi

iTrader: (1)

So, I've been under the impression that chrome wheels that came on my Shinka were a staggered set-up. (18X8 and 18X8.5). I could have sworn I saw that on here somewhere but now I can't find it again but I haven't seen anything that says they aren't either. I know the tires that are on them have a 20mm difference which leads me to believe they're staggered but I know this isn't necessarily true. Since nothing came up on my search I'm assuming they aren't staggered but I wanted to make sure because I'm trying to sell them and I don't want to lie about what I'm selling.

Grace_Excel

iTrader: (5)

If you have the tires off the wheels already you could measure it. The size should be stamped behind the spokes or around the hub near the lug tud holes.

Legot

iTrader: (1)

Ah, I didn't realize that. In the future I may still use it as an additional motor oil cooler, but for now I'll just leave it capped and empty.

Thanks!