Ultimate N/A Engine
#1
Banned. I got OWNED!!!
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Ultimate N/A Engine
What would be the best engine combination for a street driven N/A going into a 80 RX-7? Just looking for suggestions. I need to know all parts needed to build a good engine 4 port.
#4
Rotary Enthusiast
Bridgeport 13B, fuel injected, with ignition control (Microtech or Haltech or whatever), quad throttles, light weight Guru internals, light flywheel etc.
Only thing would be price, but it sure would be fun.
Only thing would be price, but it sure would be fun.
Last edited by S2-13BT; 02-15-04 at 11:51 PM.
#5
Rotary Enthusiast
Try finding some 13B NA rotors and rotating assembly from 89-91 RX-7. They are high compression (9.7:1) and couple of pounds lighter than the GSL-SE's. Then use some 12A side housings which are street ported nicely.
This setup should yield around 200-220HP easily depending on the port job. Then have a nice header and a good carb (perhaps a 48IDA) or go fuel injected.
This setup should yield around 200-220HP easily depending on the port job. Then have a nice header and a good carb (perhaps a 48IDA) or go fuel injected.
#7
spoon!
Peripheral port. 'nuff said.
That's sort of a joke. I think they can be streetable (for some value of streetable) and you don't *HAVE* to hog the ports out as far as the Mazda Factory Race ones, even if that would be the fun way to do it. But I won't go and seriously reccomend people go that way for a street car.
*I* am building one for street use, but I've taken a long hard look at all the tradeoffs, and I seriously think that I can live with them. And I'm willing to pay the price of building a new motor if it turns out I'm wrong.
On a more mundane note, I want to see someone use Renesis rotors milled for 2mm seals. I think that that could be a pretty nice combination for an NA motor, plus the rotors anyway aren't too pricey.
That's sort of a joke. I think they can be streetable (for some value of streetable) and you don't *HAVE* to hog the ports out as far as the Mazda Factory Race ones, even if that would be the fun way to do it. But I won't go and seriously reccomend people go that way for a street car.
*I* am building one for street use, but I've taken a long hard look at all the tradeoffs, and I seriously think that I can live with them. And I'm willing to pay the price of building a new motor if it turns out I'm wrong.
On a more mundane note, I want to see someone use Renesis rotors milled for 2mm seals. I think that that could be a pretty nice combination for an NA motor, plus the rotors anyway aren't too pricey.
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#9
spoon!
Originally posted by 1stgen4life
Well if money is no issue, go with a Renesis! Who knows the potential of one of those with a good port job. But this is just if money is no issue!
Well if money is no issue, go with a Renesis! Who knows the potential of one of those with a good port job. But this is just if money is no issue!
... none of us exist in *that* kind of lack of financial restraints.
#10
a hurley rotary 777 or 4 rotor, in my opinion.
side question; what is it about peripheral porting that makes the idle/low end so lousy? Is it the huge volume of fuel, the duration of the intake cycle, or what?
side question; what is it about peripheral porting that makes the idle/low end so lousy? Is it the huge volume of fuel, the duration of the intake cycle, or what?
#12
FD > FB > FC
Originally posted by Spiv
a hurley rotary 777 or 4 rotor, in my opinion.
side question; what is it about peripheral porting that makes the idle/low end so lousy? Is it the huge volume of fuel, the duration of the intake cycle, or what?
a hurley rotary 777 or 4 rotor, in my opinion.
side question; what is it about peripheral porting that makes the idle/low end so lousy? Is it the huge volume of fuel, the duration of the intake cycle, or what?
#15
Old [Sch|F]ool
Define "ultimate". When you can define the parameters of what you *want* from the engine, then you can start to determine what will give that to you.
If you want good reliability and driveability while having a good silid kick in the pants, a stock 13BT will fill the bill nicely.
If you just want all out peak HP, a huge J-port will make even more peak power than a peripheral port, however longevity will be a problem...
If you want good reliability and driveability while having a good silid kick in the pants, a stock 13BT will fill the bill nicely.
If you just want all out peak HP, a huge J-port will make even more peak power than a peripheral port, however longevity will be a problem...
#17
Rotary Enthusiast
Originally posted by Jeff20B
Ew, that three rotor 12A has a functioning distributor cap on it. How vile.
Ew, that three rotor 12A has a functioning distributor cap on it. How vile.
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