Piping For Aac Valve

[luvpsi]

Sounds good

[bubba]

Few pics to help out

For the AAC I welded a spigot to the underside of the throttle (before the butterfly) and just ran some 1/2" hose over to where it mounts on the underside of the plenum.

[luvpsi]

Yeah I'm just going to get my mate to well a bung on the crossover pipe and I'll prob do the same on aac end not sure yet I'll look at it more tonight when I'm home

[Bsa]

I'm going to try any use the bottom runners and make a bolt on like the plazmaman

[Bsa]

I made a couple of rb20 ones the rb25 ones should be a lot easier

[luvpsi]

Yeah the plenums that jd customs make bolt onto stock runners but for now I'm keeping stock intake mani

[luvpsi]

Yeah BSA that's what jd customs do

[luvpsi]

I made a couple of rb20 ones the rb25 ones should be a lot easier

let me know once you have made one so i can have a look

[bubba]

Bsa: I looked into a Plazaman plenum and I wasn't convinced it would fit under my strut brace without lowering the engine which is why I went the way I did (25/30 in a 32gtst)

[luvpsi]

Yeah I have the same problem I need a custom strut brace as they don't make them for rb25 in a Vl and rb25 sits higher

[Bsa]

I was going to make it lower but a bit wider 10mm base 3 inch pipe for the sides with a top plate 3mm. I starting planning it out just need to work out volume it will be I'm aiming for 5.5 but see what happens hard to figure out

[luvpsi]

Hope your good with maths I wouldn't know where to start haha

[Bsa]

Im getting there haha studying to become a mechanical engineer next yeah so have to get good at it haha

[luvpsi]

Haha just don't rip people off like my mechanical engineer tried to do but I caught him out

[Bsa]

Don't plan on it

[luvpsi]

Haha let me know how you go with the plenum

[Bsa]

Ok so after a shit load of reading and smoke breaks iv come up with my design simular to some plenums but different as well. It turns out the the plasma man plenum didn't do much other then store more air then stock. The reason for more response is the fact the air doesn't turn back on itself so when the valve closes the air that wasn't consumed pulses back up the runner causing turbulence. So removing the bend allows the air to pulse back into the chamber faster causing less turbulence so quicker response very simple really. So plenum size is the next thing smaller smaller the plenum gives more resonce due to increased velocity. larger the plenum means more air up top more power but less midrange. Now I want everyone's opinion seriously. Would you rather want more power between 3500rpm and 6500rpm or 5000rpm to 8500rpm for a street car? Prob should start a poll on this that way I can make a plenum to suite street and one for track. I'll start fabing one soon

Edited December 1, 2011 by Bsa

[luvpsi]

Midrange for street

[luvpsi]

Ok I was looming at the aac piping if I block of the nipple on the crossover for it what do I do with the aac end block it off there or just leave it off?

[luvpsi]

Idle control valve doesn't get used either and there is a pipe underneath it also