Quote:
Originally Posted by tervo rodriguez
here is a look at my custom intake that positive pressure comes in at 2200k w/webbers dcoe 45 on 13psi boost at 3200k and puts out 322 to the wheels 360hp on my raceported 12A
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Your plenum and intake are simple enough. Though I don't think your runners can readily be seen in the pictures you provided (since you're running a carb the runners would be underneath the carb).
Though I must say, I really like the way your plenum is set up. It looks somewhat similar to my first attempt to digitally model the intake, though I didn't place the blow off valve on the plenum. I like the thought of having the vac/boost lines coming off the plenum. Do you run into any issue with pressure sensing with a turbulent flow? I suppose you really wouldn't because stock does the same thing.
As for the code generation for calculating intake runner length and diameter I have some good news to report:
I've also included the code below for further investigation for users who wish to run it themselves and maybe even critique my math. I wrote it in matlab which allows easy 3d surface rendering accurately.
Code:
function []=runnerlength()
gamma=1.4;
R=287;%J/kgK
T=293.15;%K
a=sqrt(gamma*R*T);%M/S
redline=8000;%rpm redline
v=0.0013;%m^3
r=linspace(0.001,0.015,100);%m
A=@(x)pi().*x.^2;%m^2
rpm=linspace(3000,10000,100);
f=@(x,y)a.^2.*A(y)./(4.*(x./60).^2.*pi().^2.*v);
z=zeros(length(rpm),length(r));
for i=1:1:length(rpm)
for j=1:1:length(r)
z(i,j)=f(rpm(i),r(j));
end
end
surfc(r,rpm,z)
colorbar
xlabel('Radius, r (m)')
ylabel('RPM')
zlabel('Length (m)')