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4.97 @ 2700lbs with 23ļ standard port!!
I have had the
opportunity to learn from some of the best porters in the industry. Just
like grinders, calipers, and even a Sharpie, are tools of our trade, so is a
flow bench. In some circles you will find debate that a flow bench isnít a
viable option for developing a port and making power. While I honestly
believe it is not the end all, if you know what your looking at and how to
apply the data your seeing, itís a start and good things will happen!
I have also heard the debate that some develop ports without the aid of a
flow bench. While this might be true, I wonder what kind of R&D and track
expense was encountered in that endeavor? I wonder how many customers are
the R&D and don't know it?
I feel with proper use of a pitot tube, and the proper use of some simple
math, you can develop a port that will make power and set records. I believe
that a flow bench is the lifeblood for a pitot tube. Other devices are of
great help. Flow balls, string, even a car antenna! Iím not sure how
one can visually look at a area and think that the area is too fast, we need
to slow it down. I feel that every means available should be considered in
development. If you have flow bench data vs. track results, you can build a
data base that will prove successful each and every time. Here are a
few pictures of
I also hear that CFM isnít critical. Well my friends, thatís simply not
true! If you have a port that has 2.50 inches of minimum area, and it should
move 325 CFM, but only moves 310 CFM, that is a problem! I want the port to
flow the proper amount of air for the area available. When you have the
proper amount of area needed for your engine combination, each and every
time you move more air, it WILL make more power. Now Iím a big believer that
the velocity profile vs. the port volume vs. the air moved, is key to a
efficient port that will perform as it should. CFM isnít the first thing to
use in choosing a cylinder head, and itís not tops on the list, but it is
critical. When it comes to cylinder heads, port shape, localized velocity,
average velocity and then CFM are in the order of importance in my
Now the flow bench itself. Oh boy have I had a battle with this! All I can
say is if you own a set of plates and your bench shows it to be off, FIX IT!
The equipment is only as good as the operator, and the knowledge of that
person. Speier Racing Heads uses a SF600 equipped with a PT Black Box
II and Port Flow Analyzer software. Also in the shop is a very
powerful, custom all electronic, PTS orifice bench that is used in
development to pull higher depressions on the port for further advancements
in port shape. To put some of these
issues to bed, Speier Racing Heads recommends the new Harold Bettes book,
"Engine Airflow." It's a must read that comes from one of the leading
authorities on flow bench testing.
To help people make an
informed decision regarding any cylinder head purchase, whether through our
company or another company. To always sell our product at competitive
prices, and to rely on referrals from those customers to increase sales.
To utilize all available resources and technologies to attain our ultimate
goal of 100% customer satisfaction. My word to you. I will
gladly flow and evaluate your cylinder heads for free! The return
shipping however, must be paid by you. After receiving and evaluating
your heads, I'll give you my recommendation. If you would rather have
me send them back, with no work, that is perfectly OK with me!
Speier Racing Heads produces custom induction
systems specifically tuned to your engine and type of racing. Chad
Speier has been porting cylinder heads for well over 17 years. Chad's
cylinder heads and intakes have had positive results in all forms of racing.
Chad began porting heads in the mid '90's after spending several
years working at Madcap Racing Engines in Denver, Colorado. Chad gained
experience for CNC type equipment while working for the Worlds leader in
billet connecting rods, GRP and MGP. In October of 2008, Chad has opened a
full shop and is doing cylinder head porting full time.
Chad has worked in
the automotive industry for many years. A business man, who always puts
customer satisfaction first, Chad believes that in any industry, it's all
about relationships. Absolutely NO pressure. He will have pride and a sense
of ownership in the product long after it is sold.
Chad's primary purpose is to
apply all the same theories to a cylinder head and producing heads that are
sized to your combo. Heads that the everyday racer can afford.
Chad can make
the heads perform better applying all the critical changes. Changes can
include valve size, throat size, bowl, and cross sectional area. Bigger
Flow CFM should be one of the last things you consider
or look at. Port shape and average velocity are
KING over raw flow.
420 East 8th
Hays, Kansas 67601
Copyright © 2013 Speier Racing Heads and Manifolds
just made the
quickest & fastest
A/ND run in his class history!