ACIS manifold video???

http://www.youtube.com/watch?v=n11-RBBfU10

i'm wondering if this opening and closing of the runners is in the correct order

aren't the runners open when the actuator arm is "released" (open to atmosphere) and closed when the arm is "down" (pulled back by the actuator arm- vacuum)

basically, doesn't this system work the opposite way to the video????

just asking
 

jam

Member +
for my point of view it seem to be working the wrong way as it should keep close on idle and open on set rpm normally on idle it activate smaller runners for mid torque and open long runners for top end.
 
yeah, from what i've seen from a dismantled acis, its working the wrong way

but was just making sure there are not two different manifold set ups...lol

repped
 

weeJohn

Lifer
He needs to reverse the operation of the actuator thats all, its still operating to work on vacuum and not boost.
 
He needs to reverse the operation of the actuator thats all, its still operating to work on vacuum and not boost.

i guess there are a few options here depending on how it's set up:
- try a different vsv valve--seems there are two types commonly used, normally closed and normally open
- try to run some kind of relay to the set up to alter on/off
- maybe some reprogramming on the ecu
 

weeJohn

Lifer
None of that will matter, the spring is on the wrong side inside the actuator so it needs to be removed and put in the other side of the diaphram.
 
i think it has to do with the way its set up weejohn

i saw hoodey successfully run the actuator as it was....with the emu, vacuum cannister, vsv and check valve

however, i know some guys reverse the actuator so it can work on boost

so i guess there is more than one way to do this thing
 

weeJohn

Lifer
You are right there mate, I was not thinking about it using all the original parts designed for it, my apologies. Looks like he has it done the same way I did, but with a 2 way valve to allow the boost to escape from the actuator when the valve closes.

He must have sussed it out when he went to map it lol, or else he thought it was shit and pulled it back off again!
 
You are right there mate, I was not thinking about it using all the original parts designed for it, my apologies. Looks like he has it done the same way I did, but with a 2 way valve to allow the boost to escape from the actuator when the valve closes.

He must have sussed it out when he went to map it lol, or else he thought it was shit and pulled it back off again!

yeah, i know you worked yours on the boost concept

lololol, yeah, i hope he realised it was in reverse, else he would have got some very interesting dyno plots...lololol
 
you know you want the longer runners for low down and the shorter larger diameter for topend as shorter runners produce more power. not as someone started earlier

Tim :)
 
yeah, i know what you mean
that would be a great comparison

though the people who have done it properly have said they noticed gains over the rev range compared to the stock 4efte intake manifold---that is, moved from the stock 4efte intake manifold to acis manifold (properly set up using both long and short runners optimally).

however, no real dyno proof, as most just concentrate on the "after"---getting the acis to work efficiently
 
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