Latest
news from
AFD
This
page will keep our present and future customers informed
of what we are doing within the aftermarket cylinder
head industry.
Latest developments,testing programs,outstanding customer
results,future new product development and much more
will be mentioned on this page.To stay upto date with
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AFD Welcomes Performance Modifications
as an AFD-USA distributor
Performance Modifications
North Carolina ,USA
Phone Mike: 704-861-1861
email: mike@performancemodifications.com
AFD'S
New Release INTAKE MANIFOLDS ARE NOW IN STOCK.
casting tecnology at
it's best,this intake went to an engine fitted with
a competitors intake manifold, we made 35 hp more
straight up with a more even fuel dispursement in
the 2 long runners #1 and #8...............................Dave
AFD
start up a Cleveland Cylinder Pressure
/ Valve Timing /
Pump Fuel Testing Program.
Everyday I speak with countless engine
builders and customers from all over the world about
AFD cylinder heads and their combo's and outcomes
and hp and torque curves.
The magazines you read (and I do) can sometimes scare
the readers into believing there's a limit to compression
ratio's using pump fuel,and it eventually becomes
the normal standard line of thinking for young engine
builder's or DIY's when the actual truth is a long
way from it.
It is all too common that a customer will tell us
how much static compression they want to run and then
proceed to ask for advise on making maximum all out
power for their Pro Streeter or Weekend Warrior.........as
a result of the perception out there, I have set up
a new engine test program to explore the limits of
cylinder pressure (not static compression ratios)
on pump fuel engines fitted with AFD cylinder heads.It
is widely known that with our chamber design, only
28 degrees of total ignition timing is require for
the engine to achieve peak torque on pump fuel.
The question that needs to be anwered is "What
kind of cylinder pressure will it take to achieve
a detonation point closer to the igniton timing peak???
and what will happen to the power curves??"
The objective of this test is to exploit the relationship
between cylinder pressure/valve timing/ ignition timing
using 98 pump fuel.
I bet it is a lot higher than anyone thought pump
fuel (98) would handle.
I will post the results a soon as the testing is completed.................................................Dave
So
far this testing has been a real solid base to prove
my thoughts (that most engines don't have enough cylinder
pressure with the use of our cyl heads) as to how much
cylinder pressure our heads will take before detonation
sets in from the use of too much cylinder pressure on
98 pump fuel.
We are currently at 250 psi in the cylinder and still
haven't seen any sign of detonation occuring on the
dyno.
We have used the same camshafts with an intake closing
point of 58 degrees,using 28 degrees of timing and set
the static comp ratios at 12.5:1,then 13:1 and now 13.4:1.all
using the same camshaft,dialled in exactly the same
for each engine.we will keep pushing it further to see
were that limit is.............I believe we're getting
closer................................Dave
Fittment
of After market intake manifolds-Jan 09
There has been some
recent talk of an increased gap between the bottom
of the intake manifold and the top of the block,this
can be the case,depending on the intake used,material
removed from heads,block or even manifolds themselves
on a previous engine.
we find some brands have a larger gap than others
(I won't mention brands).
We do not make heads to suit all brands of intake
manifolds,it is not possible to do this,so some
extra machining/port matching may be required to
fit you manifold correctly
This is considered a normal blue print procedure,when
assembling a high performance engine.
In the event that this occurs,you have some options,
Option 1,if the gap is not large,either fit 1 or
even 2 of the cork gaskets stuck together,these
gaskets are generally never used on OEM headed engines.
Option 2,cut out some alloy strips (at least .080"
less than gap)to take up the gap,either solution
is a simple task and will have you burning rubber
in no time. .............................................Dave
Testing
of the AFD (High Rise) Prototype Intake Manifold is
completed.
AFD has finally completed
testing on the prototype intake manifold for our range
of cleveland/boss/clevor type cylinder heads.The results
were outstanding, torque curves on a variety of engine
sizes.
Tooling is now being created for this product to go
into full production in a few months time.
Once again..AFD has kept our customers in mind when
developing tooling,a higher investment on AFD's part
= less production cost = cheaper finished product
for the customer
I will be starting development of a new under the
hood single plane manifold very soon for those who
just cannot make any room under the hood........
Dave.
WOW........it works great...great torque increase.......Dave
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