So why aren't you using the GE intake manifold?

[MassSupra89]

I'm going to assume that was a joke :icon_lol:

On another note, the ACIS should be able to be tuned on the dyno the same as with the TVIS, one run open, one run closed, you've found your baseline switch point +-300rpm.

People have tried it, It's not worth it. If you're looking for exact numbers on gains or losses, just go do it yourself. The time and money could be spent much better elsewhere but to each his own.

 

[MrWOT]

People have tried it, It's not worth it.

Link? EGT and A/F spread? Did I miss something? Test conditions?

 

[jdub]

I have a great idea since you seem to be hell bent on doing this. DO IT and prove everyone wrong.

Otherwise it's time to STFU.

 

[loki2043]

Link? EGT and A/F spread? Did I miss something? Test conditions?

For Christ sake, just drop it already. If you are so interested in the results then buy one and put it on your car and bring us back the results.

 

[eman2289]

Do the test. Let us know how it goes.

 

[WhtMa71]

'Cause my 7MGTE came with a GTE manifold..

 

[tekdeus]

Found this link via MKIIITech:

http://www.geocities.com/mwsupra2003/acis.html

The author of that article posted this:

"I have the ACIS system on my now turbocharged 7M-GE and remarkebly it has still provided two torque curves between the designated 4200rpm. I plan to do some experimentation with ACIS during my next trip to the dyno. I will perform runs with the valve closed ( long runners), with the valve open ( short) and then multiple runs using different activation RPMS. If this system can yield more power because of its changing attributes, then it may be a desired modification for mid-power performance enthusiasts. "

It would be interesting to see actual test results. Good or bad. I assume that the NA-T 2J guys would have played with this by now. Let's post this on SupraForums?

Perhaps figgie can tell us if acoustical pulses vary with manifold pressure?

 

[MrWOT]

You know, I posted this for your benefit, because you have a good, cheap mod for performance AND reliability, available almost anywhere and it was being overlooked. If I had a GTE, I probably would test it myself, but I don't, nor do I have interest in putting one in.

The problem with your reasoning is assuming that because one person did not find gains, or did not think they did, that there are none to be found, which is wrong.

The gains from the change have nothing to do with acoustics and pulse tuning. They come from changes in inertial tuning from plenum volume, pressure recovery and changes in distribution. I already understand why it will work better, that isn't even a question. But if you aren't interested, I couldn't care less, it isn't my loss.

 

[Poodles]

Different cam so the pulses are different...

If you use N/A cams you choke up top and kill the torque curve...

System isn't tuned for it, plain and simple...

 

[strippedsup87]

With a boosted car...intakes dont make much of a differnce...but the shorter the better....

 

[IJ.]

You know, I posted this for your benefit, because you have a good, cheap mod for performance AND reliability, available almost anywhere and it was being overlooked. If I had a GTE, I probably would test it myself, but I don't, nor do I have interest in putting one in.

The problem with your reasoning is assuming that because one person did not find gains, or did not think they did, that there are none to be found, which is wrong.

The gains from the change have nothing to do with acoustics and pulse tuning. They come from changes in inertial tuning from plenum volume, pressure recovery and changes in distribution. I already understand why it will work better, that isn't even a question. But if you aren't interested, I couldn't care less, it isn't my loss.

And on that note this is dead....