nlc1179

i wired open my 5th and 6th ports a couple of days ago. i was wondering if you even need the acuators on there when it is wired open.

Directfreak

iTrader: (2)

No, But it's a shame you did that. Now you have a torque-less monster.

hornbm

lol I have the oposite until I pass emissions. I have to use my S4 lower manifold with the s5 middle and upper on my s4 block. As a result my acutators dont work. All becuase of that stupid ACV and port air....

Its fine for now anyway, I'm going to have to break in the motor first, and that means I'd be barely going into the range of where the aux ports open anyway. (keep it under 4K for 1000 mi)

coldy13

His ports wern't working at all before, my near-stock 12a w/slipping clutch would always kill him in a race, now we're dead even. His exhaust sucks, there is no place to put the line to go to the acutators. We kept them though, and are going to put them back on when he gets exhaust. It's just a temporary fix for not having any power.

nlc1179

it won't be like this forever. the dumbass that owned it befor me cut the pipe coming out of the cat and welded it shut. when i get exaust i will hook the ports up how the should be.

APT CSVT

Have you actually wired your open? It isn't that bad. In fact, I would say below 2000rpm, there may be less, 2000-3500 about the same, and above 4000rpm it is noticeably better than what he had before. If the ports are stuck closed due to carbon build up or whatever, they are not likely to be usefull ever again.

Mine never worked since I have owned my SE. I was in the same boat and wired them open after beating on them with a hammer to get them open. My engine is stock and I would hardly call it torque less.

O 16581 72452 5

What does torque matter anyway? horsepower is what moves you. you're far better off wiring frozen ports open then leaving them the way they are.

Mills

iTrader: (1)

Is this difficult to do temporarily? I think mine are working fine, but would like to "wire" them open just to see the difference and what all the debate is about.

O 16581 72452 5

It's a 5 minute job... take the actuators off the side, get some zip ties push the levers down and put the zip tie on.

APT CSVT

Actually, torque is what moves you. Horsepower is just a multiplier of torque based on engine speed. But as you said - if frozen, you are better off keepign them open that not having them ever open. If the 5/6 port secondary system works correctly, there is not need to wire them open on a near stock motor.

O 16581 72452 5

Torque is the amount of force applied to something, horsepower is the torque measurement in motion... something like that it's been a while since i read up on it, it has a relation obviously, higher the torque band in your rpms the higher your horsepower because it is creating more torque per minute... low end torque is just what gets you off the line, besides, if you're racing you dump the clutch at 3k rpms and your tach never drops below 4k rpms anyway... what's low end power have to do with anything?

coldy13

Mills, it is VERY easy to do. We did it a little more heavy duty, we used paperclips instead of twist ties

Manntis

Key words are 'if you're racing'...

If you're driving the car every day, low torque makes stop-and-go city traffic a huge pain in the ***. Not to mention the buzz of keeping your RPMs up just to be able to start moving without stalling makes your car seem like it's about to break down.

APT CSVT

I have driven my RX-7 for my commute (34 miles each way through Metro Detroit) all three work days this week since opening my frozen 5/6 ports. My car idles exactly the same at 700 rpm when warm. I am easy on the clutch at take offs (1000-1200rpm until full engagement). There are no drivability issues, still smooth response, just a little less torque compared to when they were stuck close.

As some have mentioned, low end torque is important, but doing this modification (wiring 5/6 ports permanently open) does not show any normal driveability issues. The useable power that I had before of 2000rpm to 4000rpm is about the same as I had before. However, if your ports are working as they were designed, there is no reason to do it on a relatively stock motor.

Aaron

nlc1179

i don't drive it everyday yet. i still have to get it running strong. i have an '86 accord for daily driving right now. and when i get the rx-7 running strong, i will get full exaust and hook up the ports the right way.

Directfreak

iTrader: (2)

He nailed it. The nice torquey 6 port becomes a peaky engine that you have to rev to get the power out of it.

Max7

I having working 6 ports on one and as you can see in these pix, no longer working in the other 7




I really don't sway one way or the other. I removed them to clean the engine bay and to eliminate another item that over time may or may not work correctly.