AIR SUPPLY
BEFORE & AFTER TURBO FUEL / AIR mixture is critical, and
your air supply is as important as fuel, and can be vastly improved to not
only make power, but be more fuel efficient in most cases. Most factory
intake set-ups can be improved to some degree dependent on your ingenuity
and skills.
The most effective immediate change is to a Foam Type FINER Filter or
similar that uses washable foam element with a very sticky special liquid
that traps dirt etc but allows high clean air flow. Another effective trick
is to get cold outside air to the air box, as under bonnet air can be 50
degrees hotter after coming through the radiator and intercooler if fitted,
as well as the heat generated by the turbo. All pipes and hoses should be as
large a diameter as possible with smooth bends and interior surfaces going
as direct or short path as allows. AIR TEMPERATURES.
The cooler the air when it enters the combustion chamber the better. Ever
noticed how well your turbo goes on cool crisp evenings? This is the job of
the must vaunted INTERCOOLER. This much misunderstood item acts just like
your radiator does to hot engine water that has done its job of cooling the
combustion process on its way circulating in your motor and possibly water
cooled turbo.
Simply, hot compressed air from your turbo is routed through the INTERCOOLER
(usually mounted in front of the radiator in the oncoming air stream to
benefit from maximum cooling effect from the air forced through.) As the
boost air flows through the INTERCOOLER it looses its heat to the cool alloy
of the core as it passes through on its way to the throttle and intake to
the cylinders probably 50 - 70 degrees Celsius cooler than when it exited
the turbo compressor.
Detonation is once again defeated by this cool and denser packed mixture
that allows more power on ignition. Another trick is to fit what most
factory turbo cars now have, the TURBO BY-PASS VALVE. This valve is operated
by manifold vacuum and opens to allow boost pressure that has built up on
acceleration to be recirculated when the throttle is closed between gear
changes. This valve allows the air to return back into the intake to the
turbo for recirculating so the blades of the turbo are not stalled when the
throttle is closed and the air in the intake pipes keeps moving instead of
stopping momentary.
Detonation is to be avoided at
any cost.
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Warning, the All TURBO CLUB Register makes this
information available to you with NO express guarantee's implied or otherwise on the
suitability of the information being relevent to your Automobile Make or Model. You should
not make any modifications to your Automobile unless a qualified Mechanic has approved and
checked that the vehicle is safe and roadworthy and meets all relevent State Governed
Regulations before proceeding onto public roads. The information contained in this ATCR
Website is believed to be correct but the Author and Publisher make no warranties, express
or implied that the information is free of errors, or that it will meet the particular
requirements of individual Automotive application. |