I'll bet we can increase flow by quite a bit with the stock sized ports with new inserts. One day when I get a plate on the bench, I'll fill the runner with clay to reshape it for testing to see if I'm right or not. You never know. Sometimes what looks the best from a logic standpoint actually flows the worst. If the new sleeve design works, I'll have something drawn up on cad and then machined to be a direct install. There's probably some internet based rotary company taking notes right now trying to develop and sell these before I build them. Just remember where you heard it first. Then the only thing left to do would be to backcut the short turn radius. Of course this would be what I would consider a very mild port job but it should still work very well. I'd also like to machine a new center exhaust port sleeve. I'll bet work on these areas alone can yield alot more flow. I'd love to verify it. Start small and work from there. If we can increase the flow alot but keep the port sizes nearly the same, we'll make some great progress. Larger is only better when it is only as large as it needs to be, not can be.

The hard part with templates is that it only shows you how physically big something is. If I made a template and sold it to someone, it would give them the ability to copy the physical size of my ports but not the shape under the surface. This is where all the magic is. If you look at many different pictures online of different porting jobs, some of them have the same size port but the taper from the runners is drastically different. Obviously one will work better then the other but you only hear of unjustified claims as to why each is better. If I find a shape that works the best, I'll tell everyone exactly how I did it. So much for everyone else's "secrets".

Currently I am working with a shop on the north side of Houston about getting into rotaries as a business. It's called Track Time Performance. It isn't listed in the phone book though but it is a real, legit 5000+ sq. ft. shop. Not some metal tool shed behind a shop. (If you were from here you'd get that!) So far he has all the basic machinery such as alignment machine, brake machine, balancer, welder, 4 lifts, parts washer, and a host of other things that I am forgetting. He hopes to have a dyno within the next year. Finances will determine how soon that happens. I will probably end up building him a flowbench at some point in the future too. I know the owner personally. The guy knows the 3rd gen RX-7 inside and out and does alot of work on track based cars. Not drag racing. He is honest and knows his stuff. He works hard and gets straight to the point. He doesn't bs. He is also very willing to assist the rotary community. Hopefully the March or April Houston club meet will take place there where the flowbench will be demo'd to everyone firsthand. I may arrange something through him about selling custom rotary parts such as exhaust sleeves and other things. We've spoken a little about it but haven't put any serious effort into it yet. He is not a storefront with parts in stock. He is a shop. No ricers or walk in customers hang out there. Just business. Some of this is only an idea at this point. The sleeve machining will take time to get done as I have to do the testing, then draw it out on cad, then pay the crazy price of having it all machined. I may have a better option for that part though. It all takes time. Patience is the hardest part. If I can get everything set up through this guy, it would be great. His real love is for custom performance related parts and he knows alot of technical stuff. Sounds perfect. He is the only place in Houston that I would trust anyone to take their car to.

 

Go ahead and run the stage two map, it will just burn the cat out faster than stage one. When it does just get one of the better cats or a straight pipe.

Vince

 

if somebody wants to "waste" $800 on a set of front and rear irons, i'v got an idea that entails quite a bit of welding and mods....it'll either leak water and blow up, or just kick ***.

if anyone is willing to risk $800 to find out, i'll do it for free.

 

for the cat... the car is still REALLY quiet--even without it.. the one we're turboing at jasper had no cat and it was still quiet.

i say go for the straight pipe and put the cat back on when it's time to smog.

 

thats interesting, most people say the car is really loud and ricey without the cat. I've never heard the straight pipe in person.

 

hey, snoochie just called me and the check engine light turned itself off :D

for those of you who don't know--- obd2 cars will turn the check engine light off all by themselves when you make 3 consecutive drive cycles without an error code present. maybe i was right about the motor just needing to run in? i don't know for sure, but this is definately a good thing!! i think we may dyno it again after 1000 or so miles and see if the power goes up at all, just since the motor hadn't even run in fully when we did before. it's got at least another hundred miles on it now.

dont' expect 20 hp or anything that drastic, but maybe 2-3? i gotta be honest and tell you i don't do an incredible amount with n/a cars.. i mostly do turbo rx7's. @ 350-450 whp, little things like this don't make all that much difference--at least not as much as a lower hp n/a car.

i can't wait to tune it!!! we'll be sure to let you guys know, and anyone in so. cal that wants to come hang out/help out, you're more than welcome. we can have a meet and go grub at the all-you-can-eat chinese food place by my house. :D

 

brillo,

the ported engine/stock exhaust sounds almost the same as a stock port, gutted cat.

it will get a bit louder with no cat, but i wouldn't imagine anywhere near loud enough to get pulled over for.

 

loud doesn't bother me as much as sounding like a civic with a fart can exhaust. You do have be careful that the noise isn't tiring at high speeds, like cruising down the highway.

 

speaking of hondas....
dood, i swear it sounds like vtec when the aux ports open up. LOL

 

RG... man those ideas are just making me drool. I like high reliablity and low maintenance... so FI isn't high on my life of performance mods I like. THe price for FI makes it a tough sell for the wife. So this work with porting and maybe changing the sleeves is both interesting and promising. All I can say is... more? :D

guitarjunkie28, depending on how much tuning you want to do yourself and the setup snoochie wants... get a plain jain e-manage and the wire harness and go to work. THe CZ only has the advantage of fitting literally piggyback the ECU... I would think that you guys need to do your own afr and timing tuning, so why pay extra for maps you don't need? The Ric Shaw unit is supposed to be really good too...

 

cool. i haven't done much homework as far as all that's concerned, so we'll all bump heads and figure it out...

the end decision is really up to snoochie.. hell, a super afc would even work i bet.

 

A: What's a super afc?
B: How does the emanage set up differ from the cz? Can you turn it off when I put the cat back on so it doesn't fry it? I think the cz you can just flip it off. Not sure though
c: What are the prices on these? I think i found the cz was 700 but what's the emanage? I'll go search for that now. It sounds like a better bet if we're gonna do all the tuning ourselves anyways.

 

I'm not wild about the S-AFC. It isn't much cheaper than a standard e-manage but lacks alot of control that the e-manage has. It can not control timing.

 

The CZ (Canzoomer) ECU piggyback is just an e-manage that has been repacked into a case that will fit in with the ECU is setup with a wireharness so that it's just "plug and play." THe CZ almost comes with preprogrammed maps created by CZ. Check out MazdaManiac's thread for info on the E-manage... setup, config and maps. The CZ info is in his vendor forum.

 

I remember something that Mazdamaniac, in one of his threads mentioned something about the duty cycle of the injectors being something like 65%(my numbers could be off, can't find the thread.) Can the emanage up the duty cycle? And if so, would there be any gains? I'm not sure I'm interpreting his finds the right way, but I think I remember him saying something about changing the amount of work the injectors will do to increase fuel injection and improve performance. Would too much fuel being injected just not work well? To go along with that, after porting, is more fuel necessary? Sorry about all of the questions, I'm in an inqusitive mood and very curious as to what all of this means. Thanks to anyone who can answer or point me in the right direction.

 

up to a certain point, leaner makes more power.
if we're only at 65%, that leaves room to add fuel with forced induction without having to go to bigger injectors.

 

So is it the emanage for sure?

 

For now... I'd say emanage as long as you don't mind it not fitting in the ECU compartment. Otherwise go CZ with the tuning kit.

 

i don't care what we do... add a return line with a pressure regulator for all i care--that'd help if we turbo it too.

point is we're gonna do something. :D

 

Great work guys! I've been following this thread since inception. Ground breaking. As everyone realizes though the computer controls this car. We will never get large gains and driveability til someone has conquered the beast.
I run the stage 2 CZ unit and no problems. Yes it does reduce cat life, (I believe its estimated to be around 60,000 with the stage 2) but I like the fact it's hidden and if warrenty issues arises then no one is the wiser. Thats what I like about the porting also. It's hidden.
I believe its the only plug and play unit also?(yes you do have to tune it)
Anyway I believe when this car is custom tuned, hign flow cat with stock exhaust, maybe a light flywheel, heavier clutch, springs and bars (to end that wheel hop) and a 50 shot nitrous and you will have yourself a low 12 car at the 1/4mile! PLUS a car that will be reliable and an every day driver/low mantainance sleeper. Yea Baby!
Since you are moving all that air maybe you need to modify your airbox and get a true cold air inatke going?(several threads here how to do that.)
Great work and continued good luck guys
olddragger

 

have you gone through a whole tank yet? i wanna see what happens to the gas milage. i don't see any reason it wouldn't stay where it is--if not improve.

 

i bet installing the cz ecu will extend the life of the cat 100fold...since it'll get used like one day every 2 years now :p

 

It's not going to improve 'cause he has his foot in it.

 

^ i concur.
however, i would like to find out if it is at least capable of improved milage so we can document it.

 

I'd really like a 2-3 tank average to start with..

I have only seen cats damaged form being too rich..not too lean.

You need to do this again..this thread has over 15,000 views!!!