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

[MrWOT]

I searched, and to my surprise, no one seems to switch to the GE manifold?

I'm quite surprised this isn't something that has been persued. If someone with an ems/wideband has access to both and feels like taking the time and doing some dyno testing, I'd be happy to pitch in some greenbacks for dyno time? :)

[tbcmorris]

Why would you think this is a good idea?

[MassSupra89]

For the same reason many people used NA cams. They are known to make small gains in midrange torque to get the fat NA's moving better, but tend to choke the GTE's in the upper end.

[shaeff]

There is no point in using the GE intake manifold on a boosted car. The ACIS does not work under properly positive manifold pressure. If it did, most people would swap to the GE manifold I'm sure.

Imagine the low/midrange torque gains that could be had if the ACIS worked in boosted applications? I'm fairly certiain that drjonez tried it several years ago, but I'm not sure if he dyno'd the difference or not.

[IJ.]

Because it's usually connected to a GE ;)

[tbcmorris]

GE cams is not a very good modifaction...and I would assume that a GE manifold would be the same...a lot of work for nothing

[dumbo]

If you need GE intake I got one in mint shape, with all sensors....guess why:naughty:

[Rennat]

and if you want to gain anything from a different style intake manifold the FFIM's are better than the stock and the GE...

[MrWOT]

It has nothing to do with a higher flow potential, it has everything to do with superior distribution. Like I said, if someone wants to do testing, I'll throw my own money at it, and I'll bet you the GE works quite well in a high power gte

[slowpra na-t]

i dont think it will help. i had a GE intake manifold on and switched to the gte intake and had no noticeable difference. i had never dynoed it but the track time were the same.

[MrWOT]

BTW, the ACIS is still changing the "observed" plenum volume and there will be a point at which the head will appreciate that.

[aljordan]

Lance down at Toyomoto likes to use the NA intake manifold on the GTE motors. I don't recall the reason, but it was in turbo magazine a dozen years ago.

[MrWOT]

Well, since no one seems to think this is a good idea, I'll leave this out there if someone wants to take me up on it. I'll put $50 of my own money towards the dyno, and I'll cover ANOTHER $50 if it DOESN'T make better power over the GTE.

Only requirement I have is it needs to be on a 400whp+ vehicle and I want afr tracking through both tests. I'll leave it at that.

[lagged]

Well, since no one seems to think this is a good idea, I'll leave this out there if someone wants to take me up on it. I'll put $50 of my own money towards the dyno, and I'll cover ANOTHER $50 if it DOESN'T make better power over the GTE.

Only requirement I have is it needs to be on a 400whp+ vehicle and I want afr tracking through both tests. I'll leave it at that.

i believe its been done. search around youll find the results.

[MrWOT]

I searched every thread with intake manifold in the title. Only ones that weren't about front facing manifolds were these

http://www.supramania.com/forums/showthread.php?t=16219&highlight=intake+manifold&page=3

http://www.supramania.com/forums/showthread.php?t=6013&highlight=intake+manifold

Neither have anything useful or were tested as far as I can tell.

[lagged]

I searched every thread with intake manifold in the title. Only ones that weren't about front facing manifolds were these

http://www.supramania.com/forums/showthread.php?t=16219&highlight=intake+manifold&page=3

http://www.supramania.com/forums/showthread.php?t=6013&highlight=intake+manifold

Neither have anything useful or were tested as far as I can tell.

two very educated people tried it and both concluded that the gains were minimal to non existent.

just bring the piece of shit GE manifold to the scrap yard already!

[shaeff]

Found this link via MKIIITech:

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

[SURUKO]

very interesting thread the only use i got for a n/a intake right now its trying to make an ffim with it im in the process curently remove the acis and im going to use the n/a tb in the front if anyone knows how to use the n/a tps in a gte ecu will really help me or about someone that already do it please pm me thanks...... help or opinions will be really apreciated .....

[MrWOT]

two very educated people tried it and both concluded that the gains were minimal to non existent.

just bring the piece of shit GE manifold to the scrap yard already!

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.

[Rennat]

i thought the acis only worked GOOD on an n/a car because theres no positive pressure in the intake manifold? which is why we have a "log" of a manifold with ONE inlet...

[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....