 |
|
Ford 4.0L 6 Cylinder SOHC and DOHC 998GT-A Short Engines
Although we have been building high performance
engines since 1978, it wasnt until 2004 that we
began development work on the Ford 4.0L DOHC 6
cylinder factory turbocharged engine. We
witnessed numerous catastrophic engine failures
after consumers had undertaken simple
modifications such as free flowing exhausts and
cold air intake systems to otherwise stock
vehicles, so it became apparent there was a need
for us to engineer some hard core solutions to
address the inherent factory weaknesses.
The engines possess an abundance of untapped
power with their large factory fitted Garrett
GT35/40 turbocharger; however as the engine
internals are almost directly taken from the
original inline 6 cylinder normally-aspirated
engine of the 1960s, so they were not designed
to handle 21st century boost-assisted power
levels.
We initially developed a lightweight yet durable
billet conrod to work with the 99.31mm (almost
4) stroke crank and before long our customers
were making 450+ RWKW (700+ flywheel HP) with
total reliability. Following this we pinpointed
other engine weaknesses, such as the oiling
system, torsional vibration problems, cylinder
head lifting, airflow distribution problems at
high boost etc and engineered a range of
solutions.
We have seen power levels in excess of 1000KW
(1300HP) with our components, such is the scope
for power from these big cube 6 cylinder power
plants.
We have 2 power levels available; our 698GT-A
Engines are designed to handle up to 698KW
(935HP) and for the seriously power crazed, our
998GT-A Engines (998KW/1330HP) are just the
ticket!
MY2011 Atomic 998GT-A Short engine specs
Ultrasonic tested block
in 24 spots per block thick walls are required
(we reject approx 4 in 10 for being too thin due
to core shift - like Cleveland blocks)
Phase 11 crankshaft preparation - magnafluxed,
checked for index/stroke, 2 stage Heat treatment
(normalise and stress relieve), lightened
counterweights, cross drilled main journals,
reground/indexed as required, micropolished
journals and chamfered oil holes.
Cosworth F1 Series pistons 8.5: comp ratio
and include coated skirts, anti detonation
bands, polished crowns, H/D pins and piston
crown cooling - an Atomic exclusive. Totally
silent operation.
Cosworth nitro carburised steel turbo rings
Atomic billet FatRods #306201 - bushed for
floating pins, ARP2000 bolts, cylindrically
ground/honed tunnels and pressure fed gudgeon
pins an Atomic exclusive.
ACL Competition bearings with extra oil feeds
for little end bushes
Fully machined block inc torque plate honed
cylinders, decked to crank centreline, main
saddle alignment checked etc
Race spec clearances to suit the intended
usage
Atomic Induction hardened crank sprocket
Precision balanced
Atomic Billet gear oil pump complete with
EDM cut chrome moly gears, billet end plate
(hard anodized), Grade 10 fasteners, high flow
bypass circuitry and blueprinted clearances.
Fit new brass welch plugs
Atomic main cap support girdle and windage
tray specify BA-BF or FG-on
Spray block grey (or any other colour you
prefer)
Precision blueprinting and assembly of short
motor
Supply detailed specs of completion of engine
and run-in procedure sheet
24 months warranty
A 998 GT-A short motor comprises a race prepped
block, heat treated crankshaft, Atomic billet
FatRods with pressurized oil feed to the gudgeon
pins, forged pistons with crown cooling, turbo
rings, coated competition bearings, Atomic main
cap girdle/windage tray, hi temperature silicon
rear main oil seal, blueprinting, balancing, and
precision assembly, ready for the fitment of
your head, sump and accessories.
Fitting one of our engines to a non-original
application is no problem with our Retrofit
Series. No need to use the original Ford
computer, harness and gearbox, just hook up your
choice of turbo or blower, add your favourite
ECU and you will have the baddest 6 powered car
around!
And you have the option of either an engine
built to your requirements or we can rebuild
your own... the choice is yours!
Atomic engines and components are engineered,
dynoed, track tested and fully warranted to give
you confidence you wont be let down in the heat
of competition.
 998GT-A
- New Short block assemblies
#306430 SOHC Ford 6 cyl - EB-EL Ford
#306431 SOHC Ford 6 cyl - AU Ford
#306432 DOHC Ford 6 cyl - BA Ford
#306433 DOHC Ford 6 cyl - BF Ford
#306434 DOHC Ford 6 cyl - Retrofit Series
998GT-A Engines Rebuilt Short block
assemblies
#306430-RB SOHC Ford 6 cyl - EB-EL Ford
#306431-RB SOHC Ford 6 cyl - AU Ford
#306432-RB DOHC Ford 6 cyl - BA Ford
#306433-RB DOHC Ford 6 cyl - BF Ford
#306434-RB DOHC Ford 6 cyl - Retrofit Series
|
