reawakening my rotary game, need advice on way forward
 

So yeah... I'm finally getting back in the dorito game after 10 years of not touching my car due to personal issues. I had a BNR stage 3/apexi pfc/walboro 255 w stock primaries and I'd 1650(or so) secondaries/ign1a coils/AEM water injection/ 3" turbo back setup. Was cool back then but I see engine management and single turboes has come A LOOONG way since then...

Goal: 500-600whp range

From what I understand, I can use the ign1a coils and aem WI, the short block is a banzai racing built keg with RA super seals in it, the rest isn't up to being able to play in that range afaik.

Ps, if people have parts for sale I'm open for talks.



What ecus do people recommend? I see link has a nice g4x that slots into the stock engine management box, Is it good? Or do people recommend another link g4x ecu(i see there are several types of g4x models, from base to pro versions)
Or is haltech the only way?

Turboes. I see a lot of options thrown around. Efr? Sxe366 1.0ar? Bw 7870. I prefer a mid tier budget build.

Fuel: e85 is impossible to get a hold of unless I get a barrel, so European 98 octane is the only way sadly. Will upgrading the primaries get me to goal if I stick with secondaries?

What fuel pump? Must be in-tank.
Do i need to upgrade the lines from tank to rails`? I have a aeromotive FPR, does it do the job?

Cheers people

For your fueling options, 4xx is going to be your target. Only wanting one pump you can use an aem 340 with the rewire and be fine

The sxe366 or 362 will get you what you want.

Your secondaries are good but you will want id1050 for the primary. Your fpr is good. The water injection is going to carry you. You'll want to upgrade to the v3 nozzle though. The stock lines will be fine, just watch fuel pressure.

Ignition is fine

modern ecu options are all relatively the same. Just get whatever you or your tuner is more familiar with.

What manifold do you have

What do you plan to use the car for? That’s a lot of power for most things. Recommendations can be made for your desired application.

Thanks for a short, to the point description of what i ask for, much appreciated.

4xx will be target, by this, do you mean whp or lph pump?
I have the stock FD intake manifold, but did the multi-delete on the secondary flap and all that stuff that came with the block-off plates.
Exhaust manifold, i will have to get a manifold that suits the turbo i go for, and downpipewise, will a 3" be sufficient? Or do i have to get 3,5-->3" ?

Engine has a large banzai street port.

Street fun, highway pulls, some track usage.

the link is the price performer, it does anything you'd need, and its cheap.
people are happy with the current Haltechs too, but they are expensive (Motec is cheaper!)

for the exhaust, you might be able to get it up and running with a 3" system, but ideally it will probably want something bigger.
its very easy to test, i just ran an old boost gauge to an o2 fitting and some copper pipe.

ive got a 94mm FEED system in my FC, and it just works. backpressure is low, temps are low. noise is a thing, you might keep the 3" muffler or run a different tip design
ive got a silencer in mine. at my power level its not restrictive, but it basically makes it silent. the bigger the pipe diameter, the lower the pitch will be, but if you have a small exhaust tip, or maybe twin tips its pretty effective about cancelling the low end noise.

The AEM pump is quoted as 340 Liters per hour at 43psi fuel pressure. I've seen rotary vendors list AEM part number 50-1200 (39mm diameter, 118mm length) and 50-1220 (39mm diameter, 114mm length).
http://www.banzai-racing.com/store/AEM_Pumps.html
I'm having trouble finding an RX7-specific listing for the longer pump, but this link has the specs and instructions also: https://www.aemelectronics.com/produ.../parts/50-1220

The instructions for the pump claim the internals are the same, and both pumps will support about 700 horsepower at 60psi, assuming gasoline fuel and the engine efficiency 0.65 BSFC (Brake Specific Fuel Consumption). The reason to use the flow numbers at 60psi pressure is to account for the fuel pressure needing to be higher to overcome manifold pressure. If you reduce that by 700hp by 30% assuming our rotary engines are even less efficient than piston engines, that should still support 490hp. I've never owned or driven an RX7 with that much power, but from what I've read I suspect it will take some effort to put that power to the ground and keep all of the drivetrain parts intact.

4xx whp sorry....

3" downpipe back will be sufficient. no need for anything larger.

for the pump, you will want the aem 50-1000. its what we use in all the cars we work on, not just the rx7.

Don't neglect factoring the transmission into your power goals. They don't seem to last long at that power output.

Welcome back to the game :)

Check out the Deatchwerks DW400 pump and run a -8AN feed line. It'll get you further than the Walbro or AEM.

Haltech is very popular but consider who will tune your engine and support your build, and work with them on selecting an ECU
For sure. Depending on your tires and how hard you drive it, the diff and trans can break at 400-450whp, it might survive on the street spinning tires at 5-600whp, but it'll be a ticking time bomb. A good read:

https://motoiq.com/project-fd-rx7-re...-differential/

welcome back ... :)

not an FD guy, so not much to contribute to the conversation, but i will throw a couple of thoughts out there.

from everything out there, i think you should look hard at Haltech and Link for management. for fuel supply, in addition to those mentioned above, you might also want to take a look at Fuelab pumps.

What he said.

One of the factors on selecting an ECU is who will tune it.