Very informative site

[cannondale27]

I like this one alot.Could spend days reading sites like this.

http://raceology.com/2006/01/top-racing-threads-of-05.html

[cannondale27]

This is some cool stuff.Since were dealing with exhaust recently I think this needs to be done to get a baseline/ultimate flow as a goal.

maxracesoftware
Expert



Joined: 14 Feb 2004
Posts: 900
Location: Abbeville, LA
Posted: Fri Feb 04, 2005 4:03 pm Post subject:

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Quote:
No, my pipe I use to flow with is curved and is too long to reach the port with my pitot tube with it on the head. ---Rick


did that curved pipe .. increase the Exhaust Flow when you attached it ??

Quote:
How long a pipe is needed to simulate a header pipe properly?


the purpose of using a Pipe is to ;

1-most Exhaust Port's short turns/Floors are "still in the process of turning"....and a Pipe helps to straighten out and transition flow out of the
Exhaust Port.....that's why, almost 100 % PerCent of the time, an Exhaust Port will flow more with a Pipe -VS- without a Pipe.

2-to see how much an Exhaust Port is ultimately capable of flowing in CFM

i use various diameter short 4" inch long Pipes , most all have the exit lip of the Pipe rolled/formed to a small radius exit ledge.
by using that small radius at the end of the Pipe's exit,
it lets the air transition into the atmosphere smoother with higher velocity and less turbulence, increasing the Exhaust Flow CFM.

this radiused-exit short Pipe makes the Exhaust Port flow as much as it can....so when i do bolt on and tryout the real Headers on the exhaust ports , i have a baseline CFM number to compare against.

same as Flow Testing on the Intake side.....
using a radius entry almost always makes a Cyl Head flow more
than not using a radius entry or bare head Flow Test .

you're trying to see what a Cylinder Head is "ultimately" capable of Flowing in CFM on both the Intake and Exhaust sides....in that way,
you have a Flow Number to compare against when you tryout
or bolt on an Intake Manifold + Carb to see how much restriction,
or if you bolt on a Header to see how much flow restriction that causes.


Quote:
Thanks larry, .. as I can offer NO advice on a head I'm not familliar with.
BTW, .. did you get the e-mail I sent??? ------Curtis


No ... i just checked my Email . just send me a PM on this Forum .
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