This guy

It's been my long time dream to own a turbocharged rotary ever since I've heard about how much these thing love em so much, and after I've seen all the t2s skyrocket in price and lord knows if ill ever even be able to own an fd at this rate lol
(Yes I know it was a bit dissappinting that I prolly could just bought a t2 motor by itself with the money I've already invested but by the time I realized I was too deep &#128529
So I've decided the best way to get my hands on one that ill never wanna let go is to make one out of the 12a I already own.

I've already got:
Microtech lt10c ecu
webber lower intake w/ webber style efi intake
2, 870cc primary inectors as well as 2, 1400cc secondaries
62/67 FPzero turbo
Half jigged turbo manifold 2-1/2" OD w/ 3mm schedule
And a bunch of otherstuff mostly pertinant to converting to efi

Im still in the process making sure the turbo actually fits since albeit I was extremely lucky to get my hands on an FPzero turbo made for an evo 9 for FREE however i sadly learned that this turbo spools in the opposite direction and it doesnt use a t4 flange so it's been a project in itself trying to make it fit. So in the meantime I've been struggling with my own thoughts on how I should go about porting.

I've already decided this car is going to run on e85 to make it easy and will only see track events, car meets, and the mountain roads, so I've been balancing the thought of either half bridge or full bridge (mostly for the braps, could care less about street-ability), and then what kind of exhaust port to go with, and whether to ditch the sleeves or not. I've heard too many good things about pineapple racing templates so I've decided to use them.

But my biggest concern is what kind of exhaust port to go with since I've heard it makes a really big difference concerning going to a turbo rather than just N/A however I haven't seen anybody talk about the differences regarding the 12a in mind.

If anybody can give me some insight on this subject and or if they have any suggestions for the parts setup it would be much appreciated.

j9fd3s

iTrader: (3)

you really need to decide what power level you want, then you pick a turbo and then the port goes with that.
the rotary doesn't really want backpressure between the engine and turbo, so as the port gets bigger the turbo does as well.

i'm not sure how big your turbo is, its probably too small for a bridge to work

This guy

Sorry I didn't provide exact measurements the compressor wheel is 62.1mm inducer with an 86.2mm exducer and the turbine wheel s 67.7mm inducer and 62.2mm exducer. They say it's got a flow rating of 78lbs per min but I don't know if thats them taking the evo onto account or if that's the turbo itself? I will say I actually think the turbo is considerably bigger than what I ideally want.

I was hoping to make between 350 and 450hp. But with that said, are you suggesting I match the recommended exhaust port with the intake port I settle with? Or are you suggesting I make the exhaust 1 step above the suggested port to eliminate all possible backpressure?

j9fd3s

iTrader: (3)

that is actually a pretty big turbo. the rule of thumb is that if pre turbo backpressure is more than 3psi higher than intake pressure you're loosing power. the bigger the port the more you loose too so they go together.
the Japanese tuners have the port and turbo get bigger together.

This guy

So you don't think that a full bridgeport intake with the bridgeport sized exhaust would be a bad idea?

j9fd3s

iTrader: (3)

you wouldn't really know until you saw the pre turbo back pressure vs boost number. if its good, its good, if its not good you need a bigger turbo

This guy

Alright then, trial and error it is! Thanks for your input!

j9fd3s

iTrader: (3)

my new to me JDM magazine has an FC in it, with a bridge port Cosmo engine, T51 turbo, and at 21psi its 615hp

Rx7bgs366

If you can go semi pp with a streetport it'll help spool the big turbo.