thinking of putting togeather a turbo kit.... had a few questions

1. should i put the MAF in front of the turbo or after the intercooler? seen it done both ways for this car.

2. were can i tap for oil?

3. how much boost can i run with stock injectors?

4. how much boost can i run with stock tune? [to go get it tuned]

thank you all for your help. if any other tips would be very helpfull. [about a turbo kit install]

 

draw htrough or blow through.... depends on engine management atm, and how well you know what your doing. Draw through would be the easier way to go.
pull up the greddy install instructions at www.mazdamaniac.com to find that
that depends on the turbo your using. boost does NOT equal air flow. airflow is the limiting factor. you can get up to around the 280-310whp range on stock injectors but thats starting to push the envelope of sense and safety
none, that is the safe answer. you had better not be driving the car in boost at all on a factory PCM calibration.
thank you all for your help. if any other tips would be very helpfull. [about a turbo kit install][/QUOTE]

 

First off, you need to recalibrate your brain. Boost means nothing when talking about potential. You need to think of airflow (lbs/min, CFM), not boost.

Secondly, a draw-thru setup for the MAF is more ideal since you won't max it out as quickly. Again, it depends on what engine management system you go with.

The easiest way to return oil from the turbo is at the oil drain plug (or tap and install a fitting on the oil pan near the drain plug).

You can't run any boost with the stock tune. Bad idea.

The stock injectors are good up to around 260-275rwhp. You will probably want to upgrade the P2 secondaries in the least.

 

just putting some pieces togeather thinking of going with a t3/t4 turbo with not a whole lot of boost 8-10psi not going for huge hp numbers. all in fun safe hp. thanks for your help if anyone has anyother tips please help out and if anyone has a turbo manifold they made or somthing like that let me know

 

I'm pretty sure GTAW has a custom manifold (not completed) for sale.

 

Or you can get a Mazpsort 300 Series Type 1 Turbo Kit with custom maps on a Cobb AP. About $6195 for everything and Make a safe 300 rwhp. And the best part is you will have everything you need. No going through the turbo build finding out you need something. And when you get tired of 300 rwhp you can upgrade a few components and reach 380 rwhp.

About two years ago at Mazsport we started selling and installing our turbo kits for the RX-8 and during that time we have received numerous emails and phone calls from customers who love the looks and the high quality components but were finding the price tag just out of reach. The requests have continued and now that more engine management systems are in the marketplace we have decided to offer our turbo systems in a more cost effective "tuner" package.

We will now be offering our type 1 or type 3 turbo kits in a 300rwhp package. This approach will allow Mazsport to provide you with the EXACT SAME high quality components as our standard kits making the upgrade a dyno proven sequence of steps. When you want more power just pickup the telephone and we will be happy to answer questions and advise you of the required components to achieve your desired power levels.

The typical upgrade path:

300rwhp- Either the type1 or 3 kit and you provide your choice of engine management

330rwhp- Either the type1 or 3 kit and a boost controller or larger wastegate spring

350-375rwhp- Add the remaining injectors, fuel pump, Interceptor-X and our Ignition Solution!

400rwhp- add race gas and turn up the boost

Unlike smaller frame turbo's and manifolds you will not be required to replace components of the kit to reach the next power level, you simply upgrade to the required components. We have dyno'd our kits at 380RWHP and by adding the components listed above you can determine how fast is fast enough.

 

i dont know anyone who FI's without gauges, boost control, and in most cases datalogging(i know logging is a small thing, but small things add up)

that said, the mazsport kits are as complete as a "kit" can get i suppose

 

MazdaManiac doesn't have any gauges. lol

 

He has a boost controller, and a wideband AFR, egt display, and a "virtual dashboard" from the Cobb AP. All you need.

 

touche`

 

all you need is a turbo manifold and an engine management solution and you can put it together yourself... if you know what you're doing. Those two are the sticking points on any custom turbo setup, just about every other part is "universal" in the sense that it can be made to work if you know what you're doing.

 

Haltech ftw

 

Haltech is not an option for a lot of people due to emissions testing

 

All you gotta do is register the car as a show car if you are worried about that kind of stuff.

 

A "show car"?

I'm not sure if that is even possible, and besides, when you emission test or register they usually record your mileage, so if you actually do drive more 20 miles a year they will figure it out.

Not to mention most insurance companies probably won't touch it.

 

How difficult is it to fab up a manifold. That is the hardest part to get get done and if that is completed then it would be possible to see more custom turbo kits.

 

my mother has been writing insurance for about 12 years now, and CW is right. insurance on that is through the roof, IF you can even get underwriting to approve it.

 

on the Renesis it will be tricky to fab up a worthwhile manifold. If you are going to fabricate one there is no point in going smaller than a T4 inlet flange (otherwise why not get a Greddy manifold?), so you will need clearance for that size of turbo. Besides clearance for a 3" downpipe (once again, no point in going smaller if you are going through the trouble to fabricate this stuff yourself), you will also need to collect the 3 runners together for the T4 undivided flange. Then you need to have a 4th runner that comes from the collector part to run probably a Tial 44mm style v-band wastegate, or possibly a 4 bolt-flange style wastegate no smaller than the Tial 46mm. You can't just put a Tial 38mm style two bolt flange at the collector and call it a day. I wouldn't trust that to keep boost down in the 10-12psi range that most people are going to want to run.

The other tricky part is sourcing an exhaust flange to bolt where the stock exhaust manifold went. Those are readily available for older rotaries buy you'd probably have to get one custom cut with a custom flange. Or you could try calling Mazdatrix or Racing Beat to see if they could get you one.

 

I'm still waiting for someone to use a full T4 setup and get away from this T3/T4 sillyness. G3Rx8, I'd recommend building a T4 setup; nothing outrageous, just a small-shaft T4, P-Trim setup with perhaps a 0.81/0.84 A/R turbine housing and a 50mm-ish compressor setup. I have an idea of a cheap turbocharger but since it uses a T4 footprint you'd need a manifold made to accomodate. I am unsure as to whether or not any of the older Rx7 13B manifolds can natively fit given both the intake manifold and skinny chassis room nor do I know if any exist for the Rx8 specifically.

As Chickenwafer already said, the stock injector potential is there but that doesn't mean you can do all of this turbo stuff, strap it on, then go run the hell out of the car. It needs an EFI system that can be adjusted to properly tune the turbo/engine combination. Going from non-turbo to a turbo application is a big of a big thing and it requires looking at the entireity of the overall setup.

B

 

^ uhh no peripheral exhaust manifold will work on a side exhaust engine. You been working too hard lately??

 

Well there is that, but that's not it. I'm just out of my mind and I forgot it off the top of my head. Didn't even dawn on me until you'd mentioned it even though I've messed with that stock piece once a long time ago. Here, slap my head for me Arghx.

B

 

Speaking of which, has anyone made an exhaust flange for the MSPRE like Racing Beat? Has anyone tried actually making a custom, SS divided manifold for it yet?

B