i was thinking of using 12A 6-port side housing for a 13B motor because i was told that there are no 13B 6-port in my country only, produced in USA.
i am thinking of using a n/a 13B fron a 1st gen rx7.
any input will be usefull.

 

the 12A housings should be able to work with any pre-1986 13B engines, but i have a few questions?

1.) i thought all normally-aspirated 13Bs after 1978 were 6-port, and as you stated, you never got 6-ports there - so if all 13B Rx-7s were North American only, so which 13B Rx-7 are you referring to?

2.) why do want to build a 6-port if you have access to other 13B engines?

just curious ...

 

as we know Fd does not come with 6-port ,this guy told me that all Fc in my country(Malaysia) and Japan did not come with 6-port.
is that true??
i'm not sure about the Sa/Fb in my country.

so i am thinking of making one.
i feel that rotary engine can produce a lot of power without force induction.
Jesus Padilla's 13B rx-7 is producing around 450 to 500 whp without turbo.

any comments??

 

as far as i know (from what i've read) Japanese Rx-7s (Gen II and Gen III) are ALL turbocharged 13Bs (4-port). the only 6-port 13Bs were those offered in North America and they apply primarily to the Gen I and Gen II cars.

i can't speak intelligently on Padilla's car, but i doubt he's pulling 500 HP from a 13B without a turbo, i think 450 is a stretch - even with a healthy shot of Nitrous Oxide! however, i honestly do not know. maybe he's running a 20B PP or Bridgey or something??? ... i may stand corrected.

for someone building a normally aspirated 13B engine, i'd say you're looking at around 300 HP (at the flywheel) and 4-port/6-port issues don't matter then anyways because i'm thinking Peripheral ports, slightly less if you go bridge. i've heard of people building peripherals and keeping the side ports as well, but i've never seen it and i have no idea what power levels we're talking about, but i'd doubt 450 at the flywheel, much less the drive wheels.

does that help any?

 

Jesus Padilla is actually running a 13B n/a with p.port , i think it is carb engine.
before 2002 he was using a 20B then they changed the rule so he had to use a 13B.
his best time is 9.996 at 132.22 using 13B!!
not much info about his car.
i calculated the horsepower with the time and the trap speed.

 

well ... i guess i stand corrected then. it's always cool to learn ...

now, i'm not sure what your original question is asking then because if you want the power of Padilla and you know that he did it with a 13B PP, then why do you want a 6-port? are you expecting to get it that way?

 

what do you think??

 

Follow this link on info for Jesus Padilla http://www.nhrasportcompact.com/2004...j_padilla.html
He runs 9.95 @ 131.75 I think he has gone faster than that already. The car is 13B Periferal Port running microtech injection. It makes around 350+rwhp and weighs in at around 2000lbs and yes I've seen this car run in person. It's impressive that he runs against "race cars" with lexan windows and fiberglass panels and he has an all steel car with factory glass and weighs over 200lbs more than his competitors. Pesonally forget the six port and go with the 4port motor and bridge it. It will flow a whole lot better than a six port motor will.

 

something is wrong about that link, he is now running a 13B.
how do you know that his car makes around 350+rwhp??

 

I've heard he's coming to Alabama in March 26-27 for a race. I'm going to interview him for RXtuner magazine.. I'll see if I can get any detail info.
Just in case anyone might be interested in this event, apprently 50%+ cars there will be rotary cars. mid 7 sec cars to 9sec cars..

PHIL

 

The link works for me you just have to click on it. I've meet him personnally and talked with him. I live in San Diego, CA but lived in Orlando, FL where he is from. A good friend of mine is friends with him and he bought 12A bridgeport nitrous car from him. It was 12a full bridge with 150shot nitrous in a Datsun 1200 all steel body with all factory glass on leaf springs best time of 10.5 in the 1/4mile.

 

i heard somewhere that you can tell the hp of a car by seeing the speed at the end of the 1/4 mile.

his best speed is 132.22 mph
his weight is around 1950 + 200 =2150 lb

you can calculate his hp using this link:
http://www.speedworldmotorplex.com/calc.htm

 

Calculations are just that they are calculations and not real world numbers. It gets you close but it is not exact. With the link and the calculations with the numbers you have it shows 388rwhp and 458 flywheel hp with 18% drivetrain loss. For one I highly doubt he gets a 18% loss through the drivetrain that is a typical number for V8's not rotarys running race transmissions and more efficient rearends. And that 388rwhp is like I stated he had said 350+rwhp. Calculators are great to tell you aproximate numbers but not real world numbers. The only way you get good accurate numbers is going out and race.

 

what about the renesis engine, it is also kind of a 6-port engine.
without emission control and with a bigger port and alcohol what do you think it will run?

 

Renesis is great as a stock/street motor but you have to remember what it was built for and that would be good power, reliability, fuel economy and for mass production. A purpose built race motor is different. The side intake and side exhaust port is great because it has virtually no overlap which makes it more efficient, but the ultimate rotary port is a periferal port motor no other port can match it. Even the biggest bridge can't match a periferal port. The only thing I like about the renesis is it's rotor compression of 10:1. I wish someone would come out with aftermarket rotors with different comp ratios like they do for pistons. Man I'd love to get 13:1 comp rotors.