information on forced induction!
Forced induction with GasResearch components
At GasResearch we get many enquiries concerning forced induction applications
using LPG in both "blow-through" and "draw-through"
All GasResearch systems have been designed primarily for use with
naturally aspirated vehicles. This makes the products inherently
suitable to "draw-through" configurations, as the basic function
of the fuel delivery is the same as with a naturally aspirated
Blow-through setups, however, require that the throttle body handle air
and gas at pressures above atmospheric, therefore exceeding the design
specifications. As we have not qualified the design through our own
rigorous testing and analysis program with blow-though applications, we
cannot strictly recommend their use in this manner.
We are aware that some third parties are using GasResearch
products with turbo- and super-chargers with a degree of success.
Those people who wish to run LPG in a blow-through configuration should
consult their local performance LPG shop (refer to the fitters list on this
site for reputable installers) to be sure they are getting the
best advice regarding their individual application. It is of prime
importance to be able to have the utmost confidence in the people who are
building and tuning your turbo- or super-charged system, and
be able to trust in their advice, so as not to experience any repercussions.
Until such time as GasResearch Australia Pty. Ltd. releases a dedicated forced
induction product, we will continue to recommend our systems for use in
naturally aspirated or draw through applications only.
Blow-Through and Draw-Through, what is the difference?
Blow-Through systems place the throttle body or carburettor between
the turbo/supercharger and the engine. This means that the throttle body
is under pressure, which can potentially cause problems with GasResearch
This configuration allows the use of aftercooling devices and may require the
use of a blow-off or boost relief valve (available as a GasResearch
Draw-Through set-ups require the throttle body or carby to be placed at
the inlet to the turbo/supercharger. This means that the 'charger and
all further induction pipework to the engine contains the compressed air/fuel
mixture, this can cause problems if backfires are encountered. As such,
inlet ducting should be kept as short as possible, and intercoolers and
blow-off valves should not be used.