PDA

View Full Version : Induction tuning



A20A1
11-16-2002, 11:34 AM
I'm eager to see the difference between the resonance of having the intake manifold split (dual-plane):

Single 45 DCOE
Intake Runners #4 - #1
&
Intake Runners #3 - #2
SHORTER SPACED PULSES

and

Single 45 DCOE
Intake Runners #4 - #3
&
Intake Runners #2 - #1
LONGER SPACED PULSES

Firing order: #1-#3-#4-#2
Cylinder order: #4-#3-#2-#1

Normal 4-2-1 Headers use:

4-2-1 HEADER
Exhaust Primaries #4 - #1
&
Exhaust Primaries #3 - #2
but that is hard to duplicate with a single sidedraft.

4-2-1 HEADER
Exhaust Primaries #4 - #3
&
Exhaust Primaries #2 - #1
would be easier to make for both intake and exhaust.
And the 2 should resonate together.


I was also looking at the stock carb set-up
Dual-Stage 4-1 INTAKE
(It looks like 1-2-4, but all the cyliders still feed off a common manifold/carb barrel(s))
4-1 EXHAUST


Any thoughts?

shepherd79
11-16-2002, 07:24 PM
ok i am confused with all those numbers.
what does 4-3 and 3-2 mean?
i know that 4-2-1 and 4-1 means but not the other numbers.
the other thing is that 4-2-1 gives better performance at the bottom end, and 4-1 give you high end performance.

A20A1
11-16-2002, 08:00 PM
oh it's listing the cylinder # sorry.

A20A1
11-16-2002, 08:03 PM
Anyways the resonance boosts low end torque.

shepherd79
11-17-2002, 03:55 PM
mike where are you going with this?
are you trying to figure out so you can make your own headers and intake manifold?:)

AZmike
11-17-2002, 04:20 PM
Take a look here:
http://www.3geez.com/showthread.php?s=&threadid=6466