Does your RX-7 have low-rpm BALLS?
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Does your RX-7 have low-rpm *****?
Hey i have a 10th AE and i was just wondering if because of the turbo the low end torque suffers. If i am anywhere below 3k rpm my car dogs it like a poodle, even at open throttle i will nearly be stagnating untill it gets above 3500 or so. Is this normal because i know that the rotaries just love those high rpm's...
#4
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1500RPM+ it isn't too bad
2500RPM+ it pulls like a sonofabitch
4000rpm+ it makes passangers say "holy ****"
so as you can see, its kind of a building power curve... by 3500RPM it should certainly be pulling HARD... by 2500RPM you should see full boost, and it should certainly feel like it's getting "on" the powerband
2500RPM+ it pulls like a sonofabitch
4000rpm+ it makes passangers say "holy ****"
so as you can see, its kind of a building power curve... by 3500RPM it should certainly be pulling HARD... by 2500RPM you should see full boost, and it should certainly feel like it's getting "on" the powerband
#6
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It could also be running way too rich at low rpms for ?????? reason. The only way to tell for sure is to have someone put a wideband on the car and take a look at the afr. Maybe go to where there is a dyno??
#7
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i have an N/A, that little ****** will pull hard from 2k in the lower gears. 4th and 5th will pull hard after 4k. its fun! yea, i agree with the other t2 guys, you might wanna replace or take out your cats all together. unless you have emissions laws where you are, then it might be a good idea to get new cats.
-chris
-chris
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yea out here there is no emissions laws, so all of the cats have been removed with a straight-thru bonez system (sweet ) i am running incredibly rich though, and im not sure exactly why either. im just affraid to try and lean it out because of the problems with detonation, and how would i go about leaning it out without buying an aftermarket fuel controler like the apexi afc i was looking at?
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You know, the point of a turbocharger is to give it more 'low RPM *****'
They make the RPM's go up quicker [especially lower rpms] without giving it a hell of a lot more horsepower which = lower racing class = lower insurance etc... Superchargers on the other hand double the hp and make em scream
They make the RPM's go up quicker [especially lower rpms] without giving it a hell of a lot more horsepower which = lower racing class = lower insurance etc... Superchargers on the other hand double the hp and make em scream
#14
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Originally posted by fusion-turbo
so all of the cats have been removed with a straight-thru bonez system (sweet ) i am running incredibly rich though, and im not sure exactly why either. im just affraid to try and lean it out because of the problems with detonation, and how would i go about leaning it out without buying an aftermarket fuel controler like the apexi afc i was looking at?
so all of the cats have been removed with a straight-thru bonez system (sweet ) i am running incredibly rich though, and im not sure exactly why either. im just affraid to try and lean it out because of the problems with detonation, and how would i go about leaning it out without buying an aftermarket fuel controler like the apexi afc i was looking at?
THe only way your going to take away fuel is with a fuel controller or smaller in jectors and the latter would almost certainly be a step in the wrong direction.
-C
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This is what i have done: its a stock J-SPEC engine (most likely stock injectors too, i didnt change them) with a straight thru exhaust. The other owner blew the motor and i bought the car from him for 250 bucks (quite a steal eh?) theres no emmisions crap, the ACV is still on there but i plugged it up. I agree, it should be running leaner, but whenever i stop the car or i have people drive behind me, they say that they can smell the fuel, and it smells really potent. i havent actually checked the air/fuel ratio with a meter, but my guess is that its still running very rich.
#16
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Originally posted by Terrh
1500RPM+ it isn't too bad
2500RPM+ it pulls like a sonofabitch
4000rpm+ it makes passangers say "holy ****"
1500RPM+ it isn't too bad
2500RPM+ it pulls like a sonofabitch
4000rpm+ it makes passangers say "holy ****"
Gotta love it.
#17
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Turbos increase low end torque by a **** load. I owned an N/A before my TII and it had no torque under 3k.
My TII pulls me back at 2500k with a decent amount acceleration.
My TII pulls me back at 2500k with a decent amount acceleration.
#18
I'm a boost creep...
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Originally posted by carx7
If you have no cats... you should be boosting more than stock... which means you should be lean.
If you have no cats... you should be boosting more than stock... which means you should be lean.
#19
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I drove a stock tIIs and it was a dog for power in the low band when partial throttle is applied. If I wound up the engine and kept my foot _all the way_ in the gas, it would spool the turbo and accelerate almost as fast as my ported NA does. But it was heavy and stock, while my NA is 2400lbs and ported.
To answer the original question, yes, for an NA, I would say that my car has low end *****. It has more torque than before I ported it and it is sometimes hard to drive gently in town due to the instant torque response. It's no V8 but good for an NA rotary.
To answer the original question, yes, for an NA, I would say that my car has low end *****. It has more torque than before I ported it and it is sometimes hard to drive gently in town due to the instant torque response. It's no V8 but good for an NA rotary.
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I ve got a tII 88 w/ 370 rwhp. I put a cut out where the cat was and i was making full boost by 2k.The only problem is traction.dont do this you dont have enough fuel.why do you want low end tourque you can rev for ever.you are going the wrong way.you want to leave the light a little quicker leave at 4-5k.any questions ask the 7 in flames.
#23
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Originally posted by NZConvertible
Increasing boost does not make the engine instantly run lean. Unless boost is excessive (and just removing cats won't do that), the mixtures will still be quite rich under load due to the conservative stock tuning.
Increasing boost does not make the engine instantly run lean. Unless boost is excessive (and just removing cats won't do that), the mixtures will still be quite rich under load due to the conservative stock tuning.
For what it's worth.......a jackup afm will cause the engine/ECU to so rich it will lack power and have the symptoms you describe (Cold Fusion Turbo ).
#24
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If you dont think you are running pig rich and you dont have a wideband go take an emissions test in the state of wisconsin and compare your hc content to the legal limit. Its pretty amazing.
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I live at 4500ft. elevation, and whenever i drive to phoenix at an altitude of about 2300 or so, this problem stops. That would make my car lean way out and stop this rich b.s., so i guess the SAFC would be the way to go. But still, who needs low end when you can rev forever?
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