whitehendrix
Zone Head
fails!
Posts: 757
|
posted July 13, 2009 06:43 PM
 Edited By: whitehendrix on 14 Jul 2009 02:45
dumb question?
well, mentally sizing and planning my manifold construction, i happened upon a question i know not the answer to.
well, maybe.
"Do i need the stacks in if i run boost?"
ihalf of me thinks "no" because, well, it's under boost!! BUT, not all the time.. low RPM will act like an N/A motor til it spools.. thus my question.. why?
well, looky at how i am going to run the intercooler..
i figured since i'm going to route ram iar air tup thru the ic, i need a way to vent it.. if i can shed some size at the openings by removing the stacks there, i can gain another 2" probably and make a runner to dump the hot i.c. air past that point and down past the trans to the negatice air spot in front of the swingarm.. vacuum can do the rest..
BUT, i'll hafta devise a plan B if i can't remove those bad boys.
which, i kinda already have, but still.. i like this idea better.
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
  
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted July 13, 2009 07:06 PM
Edited By: KZScott on 14 Jul 2009 03:08
keep them, or go with shorter ones, Im sure Tim, Jim or Doug ect could tell you the real reason. remember, a well ported head will work better with boost compared to a stock head at the same boost level
shouldnt you run the IC in direct air flow? like say in front of the rad if you have room?
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
tcchin
Zone Head
Posts: 867
|
posted July 13, 2009 07:10 PM
I would say yes, because the stacks are used to tune the acoustics of your intake tract. It may be that the boost will require you to change the dimensions of your stacks for optimal performance, but I would think you will still need some form of velocity stack.
BTW, how much weight are you saving by using that CF plate on top of your valve cover? 
|
whitehendrix
Zone Head
fails!
Posts: 757
|
posted July 13, 2009 08:04 PM
tim!! good to see ya man! (of course, you too, scott!)
thats interesting on the acoustics.. and as well, you've got a good point on the porting scott.. ithats why i figured i'd consult those who know more than I.
oh, and Tim, those CF plates add 96.4HP @11,500 
and best of all, they were free! (made em myself..)
that IC will be modified to change the outlet Scott.. i'm going to build a small flange and weld it to the back of the tank so the air is a straight shot into the carbs. i cut off the 4" or so of that pipe, fluch wit the tank to see if it would fit under the tank. those brackets are gone as well now. it fits liek it was made for the bike, with the exception of that outlet being at 90* from where i need it. that hole will get welded shut and i have a crafty design in my head for it all.. internally baffled and diffused for even air flow.. tho i am probably gonna make it modular in a way.. for servicing purposes and for future improvments on design (like if i can get EFI to work..) that way i don't have a big hunk of stuff i have to remove for service work and i can still use the IC if i change it up.
it should work well.. what i have planned..
i tried to call Jim today and bug him but the shop was already closed..  lol
i think i'll leave em unless a few guys counter-argue.. we'll see where this goes!
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
|
whitehendrix
Zone Head
fails!
Posts: 757
|
posted July 14, 2009 09:10 PM
well, i managed to call Mr Jim today and soak a few valuable minutes from him. (thanks again man!!!)
he states that the stacks are pretty much moot at the point of introducing boost.
everything everyone said has made sence tho, but i think i may give my new design a try and see where i get when i start this perpetual build.
sooo.. hmm..lol.. even tho i take everything Tim and Scott say right to the bank, something of this nature coming from someone who builds race engines for a living....we'll see!!
thanks again to all of ya tho for your time and opinions! always look forwards to what yous guys have to say.
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
|
entropy
Moderator
Posts: 8671
|
posted July 15, 2009 03:01 AM
i would have thought that even with boost, the harmonics of the intake are dependant on configuration?????
maybe that benefits of that dependance is overwhelmed by the benfits of boost?
____________
This moderator uses moderation in moderation
|
whitehendrix
Zone Head
fails!
Posts: 757
|
posted July 15, 2009 07:17 PM
thats is basically what he said..lol
it makes sence.. now, the nerd in me sayds there will still be something there.. there has to be, but the open-minded nerd in me say that whatever residual harminics are probably weakened to the point of being null and void. i don't think tho that port velocity wouldchange that drastically being that it is dependant on several factors, a few of which won't change, like displacement and rpm.. but then again, port velocity will i'm sure go u when it's foced to go in there anyway..
i'm really lookin forward now to loring and maybe the chance to leanr as much as i can.. look for me to probably have a pen and paper at the ready!!
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
|
|
|
|
|
HOME
NEW TOPIC