Dietbudda

Morning all, I have a few questions I need some direction on, not necessarily answers.

I'm in the very beginning phase of constructing my turbo kit for my 04 6spd. I have a decent amount of experience with piecing together turbo kits. I have the turbo, EBC, IC and piping already.

I need to find a few pictures of turbo manifolds for our cars. I can't seem to find a place that sells JUST the manifold, so I figure I need to fab up my own. I've found the manifold flange from racing beat, but would like some pictures to see if my idea will work, or if it would be better to just buy a mani (if they exist independently) and modify it to my needs.

Can some direct me to a definitive fuel system thread?
I need to find out information on specific injectors to run and what to do about pumps and possibly FPR's

Last but certainly not least, tuning.
I've read about accessport and emanage. The Accessport appears to have a program allowing you to modify fuel and timing maps, if that's the case, that'd work perfect. Any advice on pro's and con's between the two would be nice.

I have searched and found a few things, everything seems to be spread over different threads, or dedicated specifically towards the turbo kits available.

TIA guys.

Cattywampus

1. Search will answer more than I can give
2. You can piece a kit together but make sure you buy quality parts that work together.
3. Good luck on finding a manifold that is not sold with kits. Try the for sale forum.
4. Here is very informative thread on engine management. https://www.rx8club.com/mazdamaniac-183/new-mazdamaniac-base-calibrations-162263/
5.Basically search the same thread for accessport info.

Good luck

Dietbudda

Since i've been able to goof off at work today, i've found a few answers.
I'm fabbing up a manifold, i've seen what i need to make this turbo fit in there and the fab work looks easy compared to my last car.
I'm going to run AccessPORT.

Only thing i'm still fuzzy on, injectors. WHP goal is 350 (Turbo seclected (SPA) is capable of floowing MUHC MUCH more and allowed me to see 430 AWHP No spray, (480 /w spray) on my A4, from what i've found, 730CC P1 injectors and leave the rest as is.
I don't think i'm going to run a FPR, no need.

nate340

if this turbo flowed enough air for 430hp on a piston engine it wont flow enough to produce that on a rotary.

Brettus

iTrader: (2)

put the 730cc in the P2 position and leave the rest as is .
What is the turbo ? If you want a really wide powerband have a look at my link below - turbo for that is only an upgraded Greddy. It will make 350whp as well - just .

kersh4w

iTrader: (3)

there is a greddy manifold in the for sale section of the forums.

if it hasnt been bought, its $400.

good deal.

Speedrx8er

log style manifold would be the easiest to fab up.. But if you can and want a better flow and faster spooling. in my opion is to have the runners merge into one collecter..

arghx7

what is the turbo exactly? do you have a link at least? I'm worried you may have bought a turbo for a 4 cylinder. it's a common mistake.

Dietbudda

Thanks guys, all this input, awesome!!! I have some more questions, and some responses!!! Thanks for not kicking a newb out in a blaze of glory!!!
Questions????
BOV Vs DV? I've noticed allot of guys on here run BOV's. From what I’ve seen, the car only uses a MAF set-up, not a MAF/MAP.
Is there a reason for that? Would the extra 'unmetered' air dumped in after the MAF mess with the tuning?

Quote:

Originally Posted by arghx7

what is the turbo exactly? do you have a link at least? I'm worried you may have bought a turbo for a 4 cylinder. it's a common mistake.

What size is our MAF? 3.5 inch?
Responses!!!!
Thanks for all the input. The turbo is a SPA 70-63H. It's a big fugger, but it's a good low boost turbo. I've been working with Dave Hary at SPA for the last two years with the Audi. I have 4 different hot sides to try, .57 .63 .72 and .96 to try what works.
I am trying to grab a link for the turbo, but my work is blocking the link. I do have some specs on the turbo though, maybe I can get a compressor map from the guy.
T3 FLANGE
External wastegate
Compressor inducer – 64.8mm
Compressor exducer – 91.4mm
COMPRESSOR TRIM - 50
Compressor housing A/R - .70
Turbine inducer – 73.4
Turbine exducer - 55.9
TURBINE TRIM - 58
Turbine housing A/R - .63

Quote:

if this turbo flowed enough air for 430hp on a piston engine it wont flow enough to produce that on a rotary.

The turbo flowed much more than that; problem is the engine internals couldn't hold up to it. 1.8t's are weak little finicky engines that honestly, should never more 300 with serious, serious upgrades; all I had was a set of rods and the stock pistons.

Quote:

What is the turbo ? If you want a really wide powerband have a look at my link below - turbo for that is only an upgraded Greddy. It will make 350whp as well - just .

I'm looking for a power band that only really exists from 4k upwards. Not worried about low end too much.
I've been looking at putting together a log manifold, running the DP across the side/top of the mani in two pieces, make install a hair easier, and run a V-band wastegate.
I'll take a look at the greddy manifold, but with the turbo size, I believe I’ll need to run a top mount set-up.

Injectors, AWESOME! Any idea on what numbers that set-up supports?


Thanks for all the info guys!!! I'm hoping to start fab work in the next couple of weeks!!!
If I’m missing something, don't hesitate to point it out. This is the first time in 12 years of owning a rotary that I decided to throw a turbo on one. I've done turbos on pistons but never a rotary, all my rotary work has been big bridges with big Webbers!

Mawnee

Good luck with the build!

Feel free to check out my build(in my sig) for ideas.

Our MAF is 3.5". Some put it in smaller pipes, but with your HP goals you'll probably need to keep it 3.5" so you dont max the sensor out.

The stock injectors are good to just over 300rwhp so dropping in a pair of 720cc should give you plenty of headroom.

Dietbudda

On the injectors, our cars are not compatible with High Impedance injectors are they?

I'm planning on a 38mm tial WG. There's no need for a 44mm set-up i belive, but am curious to hear what others are running.

Mawnee

Its my understanding that if you are flowing enough air for 350hp on a rotory a 38mm wont cut it. It seems our engines flow alot more air for a certain hp number than piston engines. This is the same reason that a turbo that can make 400hp on a 2.0 liter 4 cylinder cant flow enough for 300hp on our cars.

blackenedwings

I would definitely include a BOV... recirc'ed it won't interfere with the tuning at all. There are a lot of choices for BOV's, I've heard nothing but good things about the Syncronic one, but I'm also quite happy with my GReddy RS.

arghx7

Go with the largest turbine housing available, and go with the Tial V44 wastegate. The rotary has far more exhaust heat and volume than the VW's you've worked with.

Dietbudda

Cool.

I'm thinking BOV more and more now. Just gotta find something quite.

I'm going to start with the .63 and move around from there. fortuntly i have access to a free dyno, shop and tuning nut.

I'm heading into the engine mangment section to start serious research. AccessPORT, any chance you can read from a wideband unit?

Mawnee

The AP cant read from an aftermarket wideband, but it doesnt have to. The front o2 sensor on our cars IS a wideband so your logs will have all the info you need