Howto calculate an Intake Mani
 

Iam thinking about to build my own Intake mani. The reason is the OEM one is eco ---- and only good to drive slow and save gas ::)

http://www.maxrev.de/album_mod/uploa...f09ee02b75.jpg

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ive some links howto build a mani but not mani that say how its calculated :1

Re: Howto calculate an Intake Mani
 

General rule of thumb is ake the plenum size 1.5 times the swept displacement. Two liter engine = three liter plenum.

I would base the ports off of the stock manifold. Making them a little shorter biases powerband upward. Making them bigger around raises the choke point of airflow. Make your changes small to modest is my best recommendation, you can make the car a real dog if you aren't careful.

Anything that comes with a crappy IM usually comes with crappy cam(s). Plan accordingly.

Re: Howto calculate an Intake Mani
 

Oh yes crappy cam´s is involved too
actualy the whole head is full of ---- >:(

but there is no replacement so i go on to tray my best with PNP and a custom Intake Mani + a nice set of headers

3liters? hmmm ok must i follow a special design like taper the plenum?

its an inline 6

Re: Howto calculate an Intake Mani
 

this is some ---- i found. i did not read any of this but it might help you http://www.phys.unsw.edu.au/jw/Helmholtz.html and http://www.physicsforums.com/showthread.php?t=80364

Re: Howto calculate an Intake Mani
 

first link :o :o :o do iam look like a ------- rocket sincetist??

second link is gold worth ;D

Thanks alot

i think i go the lazy way with ibs + plenum and call it skyline style ;D

why is designing a intake mani not so easy like an Exhaust mani ???

God bless Corky bell and his book about turbos :6

BTW
i hate this head design look at the injector position
http://euro.lexusownersclub.com/gall...ip_2.sized.jpg

Re: Howto calculate an Intake Mani
 

maximum boost is a good book but corky bell is too biased and its outdated

Re: Howto calculate an Intake Mani
 

his supercharger book has some more upto date info.

Re: Howto calculate an Intake Mani
 

that wiring looks like the orangepeel gsx mexicant tuner project overspray paintjob

Re: Howto calculate an Intake Mani
 

what kind of car is that? when i saw the manifold i thought BMW, but now that i see the car i dont think so.

also, that front rim is bent to ----

Re: Howto calculate an Intake Mani
 

its not my car just to show how the head looks

Its an Lexus IS 200

btw

on the pic is the car from the pro drifter Monster Matt

download link?