From a previous thread, it was concluded that long intercooler piping (eg. older FM piping) did not cause an effect on throttle response.

How about bends? (90* 180* bends) w/ regard to reponse time?

I was looking on TRD intercooler site and they seem to emphasize their direct routing to the intercooler vs their "competition" utillizes way less bends.

Any effects on response?

Thanks.

 

No. It doesn't change anything after the throttle body.
Not to say a bad set up (with more, tighter bends) will be as efficient as a set up with well done, soft bends.

 

wait who concluded that length didn't effect throttle response?

 

I'll say it.

 

I'll say it as well.

 

it has an effect for sure but it's measured in milliseconds and it's unlikely a human could detect it.

 

Please explain how it has no effect? (I am not saying it doesn't have negligible effect)

 

Do you have any idea how fast the air is moving inside the piping?

 

I bet it does on paper, but you'll be hard pressed to feel it. I've driven an old FM car and it didn't feel any different than mine as far as response. My pipes are both ~20" long. I think the idea works better as a marketing tool than anything. The downfall with longs pipes is their presence to heat in the engine bay and ultimately heat soak. But most of the long pipe kits aren't hanging out in the engine bay, but down low near some air and away from the major heat.

 

I would be willing to bet that the length of intercooler pipes makes a much bigger difference on S/C cars than turbos.

 

exactly. because most are blow through; the longer the tubes the greater the adverse effect.

increased throttle volume + pressure drop from FMIC = the fail.

 

I agree, depending on where the throttle is

 

The big question is throttled volume more so than just pressurized volume.

With a supercharger setup you typically have the throttle plate on the inlet to the S/C, so everything after that contributes to increasing throttled volume. When you open the throttle, there's more space that has to be filled before the increased pressure finds its way into the cylinders.

With a turbo setup, the throttle remains in the usual location and the volume behind it does not change.

 

unlikely. it's all about the cfm of air you are flowing and the volumn of the IC and piping.

an MP62 pushes 1 L of air every revolution. Most are spinning well above 10,000 RPM

How much air do you think your IC and piping hold?

 

it's still unlikely a human would be able to tell.

 

The difference in "throttle response"? Probably not. The problems that the S/C guys seems to experience usually relate to returning to stalling at idle and such.

 

I am quoting verbatim from Corky Bell's Maximum boost:

Since most people do not use the original AFM for on-boost fuel calculations, I think this statement applies.

As far as the OP's question is concerned:

 

Yep that's what I was talking about

Which I think is crappy engine management having issues with the transition between Vacuum and Boost or Boost and Vacuum.

 

Was he talking about 1% velocity or volumn?

 

No offense to Corky, i think flow is a fundamentally bad way to look at intercooler tubing (when explaining pressure drops).

Every resistance in the tract will cause pressure drop, which translates to loss of hp