arghx

iTrader: (3)

Even if you could get it to work I can't see an Rx-8 OMP working well, or at least not well enough that you wouldn't premix. The s1 Rx-8 has two oil injectors pointed towards the side seals for each rotor. The FD has one oil injector pointed towards the middle of the apex seal. Earlier rotaries had oil injectors in the lower intake manifold as well.

The S1 Rx-8 OMP system is already insufficient for a stock Renesis, hence the engine failures. That's why Mazda completely redesigned it for the S2 and added injectors for the middle of the apex seal.

Premix is unavoidable.

dznutzuk

iTrader: (1)

Hey buddy, nice job so far. Arghx is right, the stock RX8 pump doesn't flow enough, and seeing that you got an interceptor ecu I doubt it has omp control so you're going to have to premix. You don't have to hook it up at all, just block off the omp. I see that you got a new lower intake-nice! Did everything go well with the stock side mounts? Btw, get rid of the whole p/s and a/c mount and make a new one just for the a/c-not hard, more space, and purtier and lighter!

Dietbudda

Yeah the side mounts worked well, there's a difference between the block i used and the block you used, but got it to line up with a few adjustments.

As for the A/C P/S bracket, that's part of this weekend process.

Premix it is, there has to be a convient way to do it with out prmixing at the gas station right? The reason i was thinking of keeping the OMP on was since i'm keeping the RX-8 wiring harness and ECU, it will still control the OMP based off the signals it gets from the OMP.
We are keeping the drive by wire set up so i can retain cruise control cause i'm a lazy bastard.

I'll keep updates coming, dznutzuk, look for an eamil later today bud.

Dietbudda

Afternoon gentlemen, things are coming along nicely, having some issues finding some information for the fueling system.
I've been told that japanese injectors are 11mm and usdm are 14mm. Now, is that only the top of the injecotr that sites in the rail, or also the bottom of the injector that sits in the housings/intakes?
If that's true, does that mean that the center housings from JDM motors have an 11mm hole and a USDM center housing have a 14mm hole.
Thank you all.

arghx

iTrader: (3)

^ they are referring to the top of the injector.

Dietbudda

awesome, thank you very much, that makes things MUCH easier now.

dznutzuk

iTrader: (1)

What's going on buddy?

Dietbudda

Sorry bout not keeping the updates coming, I’ve been super busy with traveling for work.
I've been working on it each weekend, and keeping updates going over at another site.
http://speed-society.com/forum/viewt...=85&p=361#p361
You can see all the pictures and progress there.

I'm getting ready to drop it off net weekend to get fabrication work done. Looking at it, I'd love to have the time to do the work myself, but it's not feasible this point in time.

I'm trying to figure out the fuel system at the moment. I've got a few questions as to how to set it up, so now's a good time to ask I guess.
The set up will have 2 primaries (550) and 4 'secondaries' (750). The secondaries are easy, they will be using a top feed rail made for the Xcessive LIM. The primaries are different, I was hoping to use the stock 8's (Cleaned/flowed) and a top feed rail. What I need to find is a rail that will accept the 11mm tops and bolt to the REW block.
Then I need to figure out the lines. It's best to run a return setup on these cars right? The 8 comes with a returnless system, it also has a FPR bolted on the secondary rail.
So, how does that work? I'd love to run a returnless setup due to space restrictions, but figure I would still need a FPR. If so, where does it go? End of the secondary rail? Before the inlet to the primary rail? Or just suck it up and go with the return set up?

Anyway, here's how it sits as we speak. Feel free to look at the speed-society thread for any pictures.

dznutzuk

iTrader: (1)

Hey, nice picture in your post #1 in your thread! You can't use the original non return fuel setup. I recommend you don't use the stock rx8 injectors either, they're too small. With your intake you don't have to use all 4injectors holes, you could plug up the inner ones, or plug up the original primaries and use all 4 in a row with just one fuel rail. That isn't a fpr on the secondary fuel rail on the 8, it's a fuel dampner. I sent you the picture of how you should do the fuel pump basket, there really is no way around it. I'm happy that I got the traction control system working on Saturday-even better is that it doesn't have the stock tb to restrict my power.

Dietbudda

The RX8 injectors will only be for the primaries. The secondaires will be 4x750. For now, that seems like the best option as to keep the idle nice and smooth.
Is -4an good for a return line? I'm thining of using my old nitrous fed line for the return, and -6 for the supply.

dznutzuk

iTrader: (1)

Like I said, get rid of the stock injectors totally, you can idle just fine with 2x750cc injectors, you should have these staged just like stock, and you should also get 2x1680cc injectors. Use your stock feed fuel line for return, and use the -6 for the feed.

Dietbudda

Looks like someones ready for some up close time with a welder and his tools...

diabolical1

iTrader: (3)

haven't checked in with your project in a long time. damn, you've come a long way. some nice work so far. for your fuel supply, i'd have to agree with dznutzuk's recommendation. it keeps things simple and reliable. after you're up and running, if you care to switch to a 6 injector setup, then you can take your time to do it.

dznutzuk

iTrader: (1)

ps. Get rid of those junk coils!!! Seriously, pick up a set of 4 LS2 coils(truck variant w/heatsinks)

Dietbudda

I will be getting new coils, but there's no point putting the new ones on until after fabrication.
I'm going the route suggested on the fueling, going to wait till the car comes back, i need some time off with the lady next couple of weekends.

Dietbudda

Pictures of destruction inside of rear housing...

All these pictures are of the rear housing and assembly, the front looked fine.

warren(silver-mazda)

yikes! those things have suffered.
can't wait to start my project!

Nick_d_TII

iTrader: (6)

Just curious, any idea why it failed?

Dietbudda

I'm not sure. Car was in good running condition and there was no indication or signs of power loss. It happened after leaving the diner at lunch to head back to the site. Completly random.
Every other time i've blown a motor or chewed a trans i was running the **** out of the car, this was the first time i've popped something just cruising.

Dietbudda

dznutzuk

iTrader: (1)

Glad to see your still working on the car. Your downpipe is waaaay to close to your intake manifold, although I do see it's not screwed on. What did you do with the oil filter pedestal? Btw I got everything working with the stock RX8 throttle body and traction control works!!!

Dietbudda

I ended up using a relocation kit on the renesis oil filter pedestal. I had the holes ported to match the REW filter pedestal holes.
The downpipe is close, it will have to be close. At the moment it's only mocked up but the downpipe will be getting wrapped, it's almost unavoidable to have it that close.
I'll have more detaied pics of everything that has been fabbed up once i get the car back.
Progress has been slow last couple of weeks due to my fabricators schedule. He was competing in the 1Lap of America race with a R32 Turbo he built at his shop.

Howard Coleman

iTrader: (6)

downpipe/manifold

fix it right.

buy a sheet of MICA from McMaster Carr. insert between. ZERO heat transfer.

for details see my "save the whales, save your motor part 2" in 3rd gen section.

you need 1/8th inch daylight to get it done.

an interesting project. i might consider it but then there's that slippery slope that never ends.... brakes/trans etc etc. i have already been to the movie w my FD

howard

dznutzuk

iTrader: (1)

Why what's wrong with the brakes and trans on the 8? I see nothing wrong with them, brakes are better than what my FD had, and the transmission is just as strong. I don't care what other people say about it being crap and breaking and what not. I know a guy in the UK that had a 8 tranny in his RX7 FD and only switched it out(broke) going doing 9sec in the quarter mile. Also my transmission has been trouble so far with my 13bre turbo engine with 417rwhp...

Dietbudda

Guys, thanks for all the input. I've got the day off tomorrow and i'll be up at the fabricator. Haven't had the chance to be there since last friday.
As it stands, nothing has been wleded in place. the plan is to have everything 'approved' on friday and finalized over the next week.

Howard, thanks for the direction on the thread, i'll definetly look at this weekend.
Quick question, you didn't happen to be involed with the WI RX-7 club during 2001-2004 did you? You're name sounds strangly familiar, and i lived in the Milwaukee area round then.
Either of these cars rings a bell?


Spyro, once again, thanks for the advice, i don't think i'd have been up for this challenge without your input. Thanks bud!