Atomic Performance Products - XR6T High Performance Conrods
Atomic billet steel conrods were designed from scratch with one principle in mind; use aerospace quality materials and sophisticated manufacturing processes to produce an extremely strong, light and durable connecting rod for the popular inline 6 cylinder Ford SOHC/DOHC engines, at an affordable price.
The Design and Evaluation Process
The Atomic engineering team set out to address these parameters by designing what many performance engine builders are now calling the finest conrod on the market for the Ford DOHC 6 cylinder engine.
Extensive CAD/CAM computer modelling was employed and produced a H-Beam design, which has an extremely high stiffness-to-mass ratio. The next step was to pick the correct materials, heat treatment and surface treatment processes to ensure durability under rigorous performance applications.
Next came FEA modelling (Finite element analysis) to simulate stresses on the conrods. This also entailed weighing every piston, gudgeon pin and ring set on the market and loading this information, plus stroke, rotating and reciprocating conrod values into our computer modelling software to calculate the stresses.
The greatest load exerted on a conrod in an engine producing 600 comes not from the force of normal combustion but from the tensile force exerted by the piston at top dead centre (TDC). At 5250 RPM the piston exerts a tensile load on the conrod of 1908 gs (-1693 kgs) at split overlap TDC reversal. If you increase maximum engine speed by only 1000 RPM to 6250 RPM, the TDC tensile load rises by 50.4% to 2870 gs. At 7500 RPM the tensile loading increases to 4132 gs, clearly demonstrating the Atomics design strength of 8000 gs means it has plenty in reserve.
Excessive loads at TDC are brought about by a high reciprocating mass and/or by increasing engine RPM, so it is essential to design reciprocating engine components with the lowest mass possible to minimize premature lower bearing shell bearing failure. This is particularly relevant to our customers who are turning their engines to 7500RPM+.
For more information, visit http://www.atomicperformanceproducts.com/conrods.html
A Better Way to Install Rods on Pistons
Installing spiral locks into a performance piston is a pain. I've found a
tool that can make your life a lot easier when it comes to building
For more information, please check out http://www.horsepowermonster.com/2012/l
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MORE INTERNET GOODNESS:
Con Rod Mods-01.wmv
Here's another connecting rod modification that John Edwards of Costa Mesa
R&D Automotive Machine performs to reduce reciprocating weight.
www.engine-machining.com (949) 631-6376
Fitting of piston rings - Motor Service Group
Knowledge transfer via video
- our video podcasts provide you with useful information on our products,
such as hands-on fitting instructions and system descriptions.
The mounting of piston rings bears a lot of potential for mistakes.
We show you the most important points that need to be considered.
Cylinder Head 201 - Radius Cut Valve Job
This video covers the complete valve job process that your machinist might
perform. If the 100 series videos didn't help you identify and correct a
problem with your cylinder head, then this is the next step. This video is
brought to you with permission from my machinist in full 1080HD, and covers
cleaning up the head inside and out, preparation and setting up a radius
cutter, cutting all 16 valve seats, valve grinding, and spans 3.5 hours of
actual work in under 30 minutes. There's nothing like this anywhere else
THANK YOU BALLOS PRECISION MACHINE. Thank you for the professional
explanation and execution of a job excellently-done, and un-precedented
access to your facilities.
A valve job is done by re-grinding or replacing valves, and then having new
seats cut to match the faces of the valves you're using. There are several
different machines that might be utilized to achieve this result, but the
process is the same no matter how it's done. There are seat cutters that
utilize cutting stones. There are valve seat cutters with 3 separate
angles installed 120° out-of-phase, and there are single cutters with all
3 angles (radius cutter) that cut with one blade in one pass. The machine
demonstrated here is a Sunnen VGS-20 Radius Cutter. This machine (now out
of production) produces a gradual curved seat that's superior to the shape
of a traditional 3-angle seat. While a radius cutter does contain the 30,
45 and 60 degree angles, it does so without leaving any sharp edges between
My valve selection includes Supertech 1mm oversized nitride-coated
stainless steel undercut and back-cut intake valves, and 1mm oversized
Inconel back-cut Exhaust valves.
Inconel is a high-temperature alloy utilized in marine and forced-induction
performance engines that can handle more abuse than steel can without
melting. The other characteristics of the valves which are discussed
typically yield bigger gains in airflow than simply using a bigger hole and
a bigger valve.
Why I did this to a perfectly-good cylinder head:
I changed cams. Because the valves were previously recessed during another
valve job 9 years ago, my valve installed height was increased and this
raised the operating positions of my rocker arms. My new camshaft
selection dictates using the stock valve install height. The only
solutions to this valve install height problem are to either replace the
valve seats, or install oversized valves. I opted for the latter.
Comp Cams - How it's Made
Competition Cams, one of the industry leaders in performance engine
equipment, walks PowerTV through the complex process of designing, creating
and manufacturing its high performance cam shafts.
Eagle I Beam and H Beam Connecting Rods
Her we are showing you the features of the Eagle SIR I beam 5140 forged
connecting rods vs the 4340 forged steel 3-D H beam connecting rods. Eagle
I beam connecting rods for Chevy, Ford and Chrysler, rated to 500 horsepower on small blocks,
and 700 horsepower
on big block applications. H beam connecting rods are offered for most any
applications, Chevy, Ford, Chrysler, Oldsmobile, Pontiac. horsepower ratings are
anywhere from 750 to 1400 horsepower. Import
connecting rods, Honda, toyota, Nissan are good for 900 horsepower. All eagle rods
come standard with ARP rod bolts. Call CNC-Motorsports for all your
performance needs. We stock most all lengths.
visit our web site www.cnc-motorsports.com
Cobra Engine Build Part 1
This will be the first in a series on the engine build for my Cobra. This
is a 351W bored 0.030" with a 408 stroker crank. The intake was converted
to fuel injection and featured in a previous video. I will list components
as much as I can.
How Its Made: A TCI® Torque Converter
http://www.tciauto.com/ Ever wondered how a converter was made and how it
works. We tour TCI® and show you how.
Pistons Cast VS Forged
Which is better and how can you tell them apart? Groutaone official race
gear found here http://www.groutaone.com/
Atomic Performance Products - XR6T Vernier Cam Sprockets
The Ford DOHC 6 cylinder engine has hydraulically adjustable camshaft
timing which is controlled by the factory ECU. The factory tuning retards
cam timing (of both cams simultaneously) at light throttle above 100 KPH to
aid emissions and fuel consumption and subsequently provides no advantage
to the performance enthusiast. The VCT units do not allow the cam phasing
to accurately follow the crankshaft/piston motion as closely as is
required, which brings about tuning and fault code logging issues.
Proficient tuners know that accurate cam phasing is critical to extracting
maximum power from a given powerplant, so we designed and manufactured
adjustable cam sprockets to allow tuners to maximise the VE of every engine
Another advantage of our Vernier sprockets is that it eliminates the
requirement to retain the original Ford ECU and harness when transplanting
the DOHC engine. Very few aftermarket ECUs can control the variable cam
function, so with this requirement eliminated a whole world of
possibilities of retrofitting the DOHC engine to earlier vehicles becomes
available to the enthusiast.
Atomic vernier sprockets are CNC machined from 4140 chrome moly steel with
the outer section of the DOHC sprockets gas nitrided for maximum
durability. Secured together by four hi-tensile allen head bolts, timing
adjustment is quite simple due to the degreed markings on the hub. A full
36 degrees of movement is provided, allowing the professional engine
builder a huge scope of adjustment.
Atomic timing chains for the DOHC Ford 6 cyl are more than 80% stronger
than the stock chain for use with heavier than standard valve springs. They
feature roller trunnions and 1.7mm thick link plates to provide the utmost
in reliability. Will fit with standard or aftermarket sprockets.
For more information, visit