using a common plenum would be the same as just having 1 t/b, once you where above idle, thats why you don't see it on boosted motors.
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The only way I would even think about installing ITB's would be before the runners start in toward the head. That way there would be a chance for the airflow to smooth out a bit after being forced around the butterfly and bar.
You would still need to have a decent design for a surgetank/plenum.
I would think getting the car to idle right could be a challenge as well.
I think it's not worth the effort as we have seen numerous 700+whp srt's do well on the stock manifold with nothing more than a bit of portwork.
Can it be done? Probably. Is it practical? No. Again, the stock design is great compared to any number of other oem applications.
The only way I would even think about installing ITB's would be before the runners start in toward the head. That way there would be a chance for the airflow to smooth out a bit after being forced around the butterfly and bar.
You would still need to have a decent design for a surgetank/plenum.
I would think getting the car to idle right could be a challenge as well.
I think it's not worth the effort as we have seen numerous 700+whp srt's do well on the stock manifold with nothing more than a bit of portwork.
Can it be done? Probably. Is it practical? No. Again, the stock design is great compared to any number of other oem applications.
$.02
now thats the answer i was looking for. as i was reading about them and wondering why no one has tried this, i never considered the cost to benefit
ratio.
why are they so hard to tune? i know its bringing a shit load of more air in. would you have to extremely large injectors, or 4 more?
The only way I would even think about installing ITB's would be before the runners start in toward the head. That way there would be a chance for the airflow to smooth out a bit after being forced around the butterfly and bar.
Most OEM designs that I'd seen actually use the butterfly near the port to induce swirl and tumble(4cly Sport bikes, I think a ford v8 has a "swirl" throttle near the port entry). This makes the mixture more homogenious, thus improving combustion efficiency and usually increases mass flow and particularly transient response. To adapt a similiar design properly, you would need a wet flow bench to see any improvments as a regualar bench would show little if any CFM increase.
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Last edited by duster360 : 11-20-2008 at 07:31 AM.
i know its bringing a shit load of more air in. would you have to extremely large injectors, or 4 more?
An increase in mass flow would be moderate and would only need similiar increase in fuel. I seriously doubt larger injectors would be needed but only changes to the fuel map, unless the current injectors are maxed out.
An increase in mass flow would be moderate and would only need similiar increase in fuel. I seriously doubt larger injectors would be needed but only changes to the fuel map, unless the current injectors are maxed out.
$$/HP benefit would be very small.
people say the are hard to tune... because they are thinking of the old Mopar 6pack (three 2 bbl carbs) and in reality.. they WHERE a bitch to tune.
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7-10K should really shine 
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