Jcola

Just wanting to know if this could be done, i have 2007 6speed rx8, and what i have in mind is to get a self oiled supercharger(no hassle of oil lines and such) and i want to remove the stock air box and place the supercharger there(engineer my own brackets to hold it in place). Then it seems if i can achieve that all i would need is piping.

main questions
1)will the supercharger actually fit and be able to reach the belt drive?
2)if achievable which is the best way to have the supercharger facing?
3)will there be enough room for the supercharger and piping and new filter?

just an FYI id be using something along the lines of the v3 sereis vortech supercharger. Also I understand the mechanics behind all of this, I just want to know if it could be done?

thanks

wcs

iTrader: (2)

What about tuning?

Have you tried discussing in the Pettit Supercharger thread?

edit --> these guys should help you out https://www.rx8club.com/major-horsep...27674/page394/

Jcola

yea i would get an access port cobb tuner, after doing some reading about tuning they say with the 8 is to tune the ECU last

skc

Good idea as it will keep the heat away from the engine. However, your TB and the rest of the pipes will be very different and possibly difficult to achieve in the space available.

If it can be done then it is a good idea.

WingleBeast

hope you are aware of the cost associated with building your own kit compared to purchasing a bolt-on kit

Jcola

it seems it would be a lot cheaper then purchasing a kit, 2k for the supercharger then all you need is piping and some half inch sheet metal for to build your own brackets. probably could all be done for 3k, more or less.

skc

Your proposed set up has not been attempted before with the RX8. I have seen centrifugal blowers attached to alternator pulleys in other cars so you would think it would be possible to do something similar with our car

Jcola

yea, well the thing is i will attempt this in the distant future, i dont have the $$ to even start and time, pluse i have never really held or seen a centrifugal supercharger, so i dont know how big they are. I have just done A LOT of reading about them along with turbos, once i get my hands on one then i will know for sure, but all i really wanted to know is if its possible with the space provided.

WingleBeast

DNA Motorsport

Tracmac Engineering

Highway8

iTrader: (11)

Engineering and building a kit isnt as simple as it sounds.

I can sell you a used and modified DNA kit complete with procharger c2 compressor with all the brackets, piping and intercooler plus answer any and all questions you may have about how to install and the challenges and highlights of the kit.

Jcola

oh wow thank you Wingle for that link, that is exactly what i was looking for, i know this sounds crazy but the only thing i'd do different is get rid of the air cooler and just send 1 pipe from the supercharger out behind the front bumper with a filter on that. As for highway8 i would love to jump on that offer, but i just really don't have the kind of money to drop on the kit at the moment, like i said i will definitely consider this in the distant future.

WingleBeast

if they are selling it for $12K how much of that do you think is parts and production. Just think that even if 50% is profit, thats still6K to build the kit on your own

Highway8

iTrader: (11)

Are you saying you wouldnt run an intercooler? Bad idea!!! With no intercooler you would be limited to about 4-5psi on a centrifical SC or about 3 psi on a Roots or positive displacement blower. Compressing air creates massive heat and a hot intake charge is bad. While you would notice the power increase from a low psi system, you want to go higher and the intercooler is required to do so.

If you really want to design your own kit, i could sell you the lightly used blower and brackets for less then you would spend for just a blower. You could fab up all your own piping from there. But I am warning you, it isnt as simple as it looks.

Darkness8

iTrader: (2)

highway, how much you talking about? just saw the same charger he found and was doing research on it. the idea makes sense. i just cant figure out if the v3 is sufficient as far as cfm's or g/sec go. just read tons of pages on the pettit thread and didnt find the answer yet.
seems this kit if can be done would run about 5grand but should be pretty reliable once tuned properly.

Red Devil

I had this link sent to me. I've built two different SC kits for the RX-8.

The first is a MP90 non-intercooled setup. Operates at 5-6 psi, and has been for about 30K miles on a completely OEM engine including a dozen track weekends. This rests pretty much in the vicinity where Pettit mounts their unit as it is the most logical place for a positive displacement unit. It currently runs on a AP, but previously on a Microtech. This was a custom, one off job.

The second setup is a rotrex, laminova intercooled configuration. I'm just about to get this one up and running. This SC will be driven off of a double-sided synchronous drive as opposed to standard Vbelts. The SC sits exactly where the airbox is located and the inlet to the compressor faces directly forward. This was completely CAD and CNC'd.


1. Most likely, but be aware that if you use the alternator line you may have issues with your plumbing and proximity to the UIM. Also, the 5 rib line is ok, but not really ideal for anything other than 6-7 psi, after that you will be applying a lot of tension to that line. An eccentric shaft extension with more ribs would be preferable, imo. Replacing the UIM is just a pain.

2. The inlet of the SC should be facing to the front of the car for easy plumbing.

3. put the filter outside the engine bay, especially if you want to MAF tune that will make it easier.

I looked at Vortech, but opted for Rotrex. It just is better technology, imo.

Centrifugal SCs don't get a lot of love in the rotary community, and some of that is very valid. The Rotrex units drive system, however, helps to mitigate some of those concerns. Namely, the boost curve is more linear and less peaky like in a traditional Vortech.

As compared to a positive displacement SC, the Rotrex draws much less parasitic drag to achieve the same amount of work. Despite the lower boost at lower rpms, the Rotrex should provide more available power vs. a comparably boosted Eaton/Lysholm unit from ~4500 rpms to redline.

To do a custom job and do it right, you need access to:
-source for your pulleys
-milling machine/lathe
-chop saw
-bandsaw or plasma cutter
-tig welder

Red Devil

Wrong

9krpmrx8

iTrader: (46)

Red Devil

bose

iTrader: (5)

Not to mention, the kits already have the little things sorted out.
THIS.

TeamRX8

iTrader: (25)

the way I see it he's referring to using a SC in the first place

Red Devil

Makes zero difference to me. What's funny is funny.

mdw1000

To split hairs Red Devil, it is an MP62

Darkness8

iTrader: (2)

That conversation just took place in the pettit owners thread. Turbo vs SC. ofcourse 9k rathers turbo, because that is what he choose to run. I am still at the research point and taking in everyones point of view and why they came to those conclusions. either way everyone basically want the same thing reliable power! I must say though, most common opinion is used greddy kit to start and build up from there.

boostdtalon

Just to add a little info to this thread; as I was doing homework on piecing together a SC kit in the future. I just emailed DNA about purchasing a few items instead of the entire kit. Their entire mounting bracket for the D1-SC procharger was $1600 US and the associated belts and pulleys was about $700.

ShellDude

iTrader: (12)

hey... there were RX8s on that boat!