Thanks everyone for answering my question on the oil pressure. Got another one. The car I drove had very little pickup until the revs hit about 3000 rpm. Once you hit the 3000 point the car started to zoom along. The car is a normal 13b motor (no turbo....sigh). Is this normal?

 

no this isn't, check your 5th and 6th port actuators. they are located on the pass side of e motor next to the air control valve(pumps air into your cat to pass smog laws) they look they are two cylinders on opposite ends of the motor. check to make sure that they open and close if they are frozen remove them and wire them open. if they function properly then they aren't the problem. it could lie elseware

 

yes, thats normal. RX-7s, N/As especially, don't have much in the way of low-end torque.

the auxiliary ports function around 3800 RPM, giving the car more high-end power. so that cant be his problem.

 

N/A's have great pickup in the low end, so I dont know what your talking about. N/A's are almost as qick as turbos down there because the turbo isnt doing much.It might be your ecu or primary fuel injectors.

 

No, what kind of crap answer is that?

If anything they would be frozen open or already wired open. He has no power under 3K RPM...

What are you thinking????

Wiring them open would make his low end even worse; if they are not stuck open already.

Think before you post. Out of your three posts to date, two of them are blatantly wrong. We ban here for giving out too much bad info.

 

or his vdi is wired open too.... if he has a s5

 

so you guys are saying that you haven't wired open your 5th and 6th ports. mine are wired open granted i do lose about 10hp below powerband but from 3800 to redline I gain a signifigant boost in hp. granted I may have been wrong about the particular problem he's having i was mearly implying for him to check the actuators to make sure they were functioning properly

 

Wiring them open gives absolutely no gain in abolute power over a properly working system, and it kills low end power. If it got faster by wiring them open, then they werent working right to begin with.
As for his problem, it sounds like they are always open, whether they were wired open or stuck, I dont know. VDI wired open could also cause the problem, as stated earlier.

 

No, mine work properly. I don't know about you, but I spend a good deal of my time under 3800 RPM, and I prefer power down there as well.

Back to the original poster: What kind of "No power" are we talking about? Is it just kind of slow under 3k RPM, or is it absolutely gutless (as in you have to slip the clutch to get started while holding it at 3500 RPM type gutless)?

If it's the first, that's normal. You might want to check your 6th ports, because if they're stuck open you have less low end torque than normal, but it's still drivable.

If it's the second, then you do have a serious problem. If that's the case, you'll want to confirm that both rotors are running properly. How is the idle? Smooth, or idling like a lawn mower or a V8 with a race cam?

-=Russ=-

 

I have almost this same issue. Car runs/idles great, but is extremely sluggish off the line until after 3000rpms, then it really takes off. The 5-6th port actuators on my car are frozen shut and not even hooked up (that part of the exhaust is missing), so that wouldn't be an issue until AFTER 3800 or whatever.

 

No, there is no gain what so ever with wiring them open.

How could there be. The air flow is the same as if they were functioning properlly at above 3850 RPM. You didn't increase post size. You didn't increase timing. You didn't increase fuel or air flow.

All you did was throw away low end power.

You can not have any gains wiring them open. Only losses. And if you think you have any gains, then even more so your advice is suspect.

 

How does it idle and what does it get as far as gas mileage? Does the car have the original factory exhaust (including non-gutted cats?)

 

I guess the question boils down to, "How sluggish is sluggish?" Below 3000 RPM, the engine is not making much power. It certainly won't blow anyone away off the line at a normal start, and even at WOT it's slow below 3k (actually, it's probably faster at partial throttle due to the secondary ports being closed off and the primary port velocity being higher, but I won't nitpick), but it's certainly drivable around town without ever exceeding 3000 RPM.

You should be able to start off, have the clutch fully locked up below 1000 RPM, and get around normally, though not quickly, without exceeding 3000 RPM. This is "normal". If you have to slip the clutch massively to get started, and stall the engine trying to get the clutch fully engaged down low, this is "NOT NORMAL".

And "just 10 HP" below 3000 RPM is a huge chunk, when the engine is only putting out 30-40HP in the first place.

-=Russ=-

 

you mean 130-140? lol

 

Not below 3k RPM's...

For example:

https://www.rx7club.com/attachment.p...hmentid=130691

(this is Kahren's, posted in the dyno/time-slips section)

 

Thank you. Using 2500 RPM as an example, the engine is putting out 40HP to the wheels. "Just 10hp" off that is a 25% reduction in power. I tend to think of that as significant.

-=Russ=-