Has anyone tried to bypass the vacuum actuator on the VAIS to keep the VAIS open all the time. It can be done easily with a short piece of wire. Will this add to the HP?

 

Are you talking VAIS or the SCV valve. The VAIS is the fully electric valve on the driver side. The SCV valve is the vacuum actuator on the pass side. The SCV is a Swirl Control Valve. The idea for the SCV as I understand is to swirl the incoming air from the intake runners before it enters the intake port area. This swirling effect is supposed to increase the effeciency of the air-fuel charge to the cylinder. At higher RPM's though it is open completely and is a minimal restriction. But you could always try it out to see how it reacts. I'd be interested to know.

 

The VAIS (drivers side just in front of the throttle body) which opens up at 5k RPM. But if it was open at a lower RPM would I gain any power?

 

yes you can but you will have a tq penalty below 5k rpm. According to those who have done it though, it is suppose to be a screamer above 5k rpm.

 

I would be better to take the rod out instead of keeping it "open" at all times.

 

Keeping it open all the time you lose tq below 5k, and gain nothing after 5k, taking the rod out you lose tq before 5k and gain a little bit above.

 

How much TQ do you lose, a lot or not enough to notice???

 

not too much torque. but you definitely can notice it.

the high end power is incredible.

 

I say we all take our rods out.

 

 

my dynos showed around a 10-14lb torque loss across the board til 5k where the power band is moved to. i think i made around 15lbs of torque more at redline. the hp is only slightly higher than one with a properly working vias.

 

yeah i showed 15lb loss across the board. i don't think it's worth the loss. it screamed up top, but not enough to off set the torque loss in my books. and it was dynoed on the same day when i took it out. my HP numbers were better, but that's because it wasn't working on my first two runs.

 

So what about someone running cams or nitrous wouldnt they benefit from this. What about takeing out the rod and putting in bigger injectors?

 

That makes no sense.


That wouldn't do anything but make it run richer (N/A of coruse)

 

i wish i had a full time VIAS

 

Then it would eliminate the "V" in VIAS...

 

how does that not make sense. it lost torque but gained hp. the car ran hard all the to redline from 5000 but before that it was a dog. now if i could rev my car to 7200 then i think i would keep the valve out because the car would continue to make power. but it doesn't so i'll keep it in.

 

If it lost 15 ft/lbs across the board then it NEVER showed a gain in hp or tq.

Across the board, to me, means over all RPM points.

 

while you do lose torque in certain rpms, remember since horsepower and torque have a relation, that the torque is higher where the hp is higher.

 

That sounds made up.

 

Some ancient greek physicist made it up and we believe him sloppy is his predecessor, just passing the word.

 

True. Especially if horsepower is higher at 5,200 RPM.

 

I make more torque at 1200 than I do at 7000 but @ 7000 my HP is much higher than my tq

 

thats because you got the JDM option.

 

What JDM option?

 

lol

 

You guys get to 7000k RPM? at the track? I don't think mine has never reached over the red line.

 

Don't know how, my redline is 6500rpm. must be a TCM mod or electronic upgrade.

 

you are just bitter cause you dont gotz da jdm.

VaporHead-the reason NmexMAX is reving that high is because the technosquare ecu.

 

i can rev my car to 6900...and i have a stock ecu

 

You must have the JDM option too..

Both my A's are JDM y0!

 

speedo error ftl. ive seen my tach goes as high as 6800 on stock ecu but both vafc and obd scan said a few hairs under 6600.

 

The A32 tach has always been faithful to me. I have a 7200 shot but its at work

 

wow, SES on both of your cars FTL

 

I was wondering who the 1st to notcie that was going to be