hybrid_G4E
Member +
i think all of us is using blow thru system, meaning throttle body is just after intercooler, but before intake plenum.
but will you take a look @ draw thru systems utilized by F1 teams (and some turbo bikes fer that matter)
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Try put your hand in front of a vacuum cleaners nozzle. Notice it will rev higher. That is because there is no mass, nothing, to suck. This is the reason why the throttle is positioned there, close the intake and you take away air from the turbo blades so the blades would spin easier and slow down less when the throttle is closed then you have less turbo lag. It also makes the turbo spin faster when the throttle is closed compared to the usual set up. You also won't need those annoying blow off valves. Problem with this set up is is creates a lot of vacuum when the throttle is suddenly shut, so much vacuum that if you have the wrong bearing set-up, it will suck oil from the bearings.
Eliminating the butterfly and it's shaft from the intake tract reduces turbulance and a major restriction. Here, with the throttle outside of the turbo, the pressurized air has no restriction other than the intercooler.
"
makes sense?
just sharing. not that i'm gonna try it tho.
but will you take a look @ draw thru systems utilized by F1 teams (and some turbo bikes fer that matter)
"
Try put your hand in front of a vacuum cleaners nozzle. Notice it will rev higher. That is because there is no mass, nothing, to suck. This is the reason why the throttle is positioned there, close the intake and you take away air from the turbo blades so the blades would spin easier and slow down less when the throttle is closed then you have less turbo lag. It also makes the turbo spin faster when the throttle is closed compared to the usual set up. You also won't need those annoying blow off valves. Problem with this set up is is creates a lot of vacuum when the throttle is suddenly shut, so much vacuum that if you have the wrong bearing set-up, it will suck oil from the bearings.
Eliminating the butterfly and it's shaft from the intake tract reduces turbulance and a major restriction. Here, with the throttle outside of the turbo, the pressurized air has no restriction other than the intercooler.
"
makes sense?
just sharing. not that i'm gonna try it tho.
