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  • FPV521
  • Member
  • Member For: 20y 8m 2d
  • Gender: Male
  aps said:
  macka said:

I'm thinking supercharged XR6 and edit might be on the cards.  :spoton:

macka

<{POST_SNAPBACK}>

macka don't waste your time or money, a turbo XR6T will hose the S/C XR6 easily and with better power and torque across the entire rpm range.

I've seen a number of supercharged XR6 engines over the years and to say they are disappointing would be a gross understatement. :spoton:

Peter

<{POST_SNAPBACK}>

Yip the reasonably new supercharged 6 commordores are running 171 kw at the engine, not sure why they were even advertising it on the TV. Not sure what the new ones are running at but not even sure if there is a supercharged VY.

  • Member
  • Member For: 20y 11m 10d
  • Location: Mildura
  aps said:
  macka said:
Peter,

Can't you overdrive a supercharger to resolve this issue?

Or is it not possible with centrifical superchargers.

macka

<{POST_SNAPBACK}>

Macka the real problem with centrifugal blowers is you need to gear the blower around the boost pressure you will have at red line.

In other words if you want to run say 10 PSI at approx 6000 rpm the centrifugal type blower will only produce something around 3 to 4 PSI at 3000 RPM, compare this to a turbocharger...............the turbocharger being exhaust gas driven will produce more like 8 PSI at the identical rpm (3000 rpm) hence much greater mass air flow............higher torque and power across the entire rpm range than a blower. :spoton:

Peter

<{POST_SNAPBACK}>

Thanks Peter,

The positive displacement superchargers or (roots/srew) make boost from low down but then I guess run out of puff later on at higher rpm. Would this be a problem with such a low rpm engine like the I6 which only revs to 5800 - 6000.

Even if the centrifical supercharger was making 5-6 psi, if I was directing that air mass straight into the turbo, what would be the effect on the turbo spool?

The reason why the supercharger interests me is in the low down torque. And even power curve it would produce. Turbo cars while being fantastic seem to be very hard on drive train as the boost hits it like a sledge hammer when it kicks in at 3500rpm onwards. This cannot be good for the drive train.

The thing that impressed me about the supercharged V8 Boss the other night was the power seemed to be instantaneous. Maybe it was the low down torque of the V8. As I understand it, I thought that the xr6turbo produced torque lower than the V8 ie from 2000 rpm. Maybe its just the larger displacement engine.

What I had in mind was to use the Supercharger with a clutch drive (roots/screw)to produce 6-8 psi at 1000 rpm up to 3000 rpm plumbed into the turbo to bring on boost from the start of the rpm range. Have the supercharger clutch wired to a boost switch of some type so that when the turbo boost equalls or is slightly greater than the supercharger boost it would dis-engage and the turbo would take over.

Might not work. But it would be one radical xr6 or xr6turbo :sick::wub::spoton:

Thanks Dynowog, I have'nt forgotten you, just after as many points of view as possible.

This is one pretty radical idea I have for my "T" just need to understand the ying and yang of the concept before I spend (waste) money trying.

macka

  macka said:
Thanks Dynowog,  I have'nt forgotten you, just after as many points of view as possible.

This is one pretty radical idea I have for my "T" just need to understand the ying and yang of the concept before I spend (waste) money trying.

macka

<{POST_SNAPBACK}>

didnt think you forgot me just wasnt sure you realised I had that v2 vortech there for you to see and the rest was just my opinion <_<:cry:

  • Member
  • Member For: 20y 11m 10d
  • Location: Mildura
  Dynowog said:
didnt think you forgot me just wasnt sure you realised I had that v2 vortech there for you to see and the rest was just my opinion <_<  :cry:

<{POST_SNAPBACK}>

Dynowog, or Any other tuners

In your OP will it work or produce any benefits.

macka

  macka said:
  aps said:
  macka said:
Peter,

Can't you overdrive a supercharger to resolve this issue?

Or is it not possible with centrifical superchargers.

macka

<{POST_SNAPBACK}>

Macka the real problem with centrifugal blowers is you need to gear the blower around the boost pressure you will have at red line.

In other words if you want to run say 10 PSI at approx 6000 rpm the centrifugal type blower will only produce something around 3 to 4 PSI at 3000 RPM, compare this to a turbocharger...............the turbocharger being exhaust gas driven will produce more like 8 PSI at the identical rpm (3000 rpm) hence much greater mass air flow............higher torque and power across the entire rpm range than a blower. :beeer:

Peter

<{POST_SNAPBACK}>

Thanks Peter,

The thing that impressed me about the supercharged V8 Boss the other night was the power seemed to be instantaneous. Maybe it was the low down torque of the V8. As I understand it, I thought that the xr6turbo produced torque lower than the V8 ie from 2000 rpm. Maybe its just the larger displacement engine.

macka

<{POST_SNAPBACK}>

Macka the extra cubes of a 5.4 litre V8 always helps the centrifugal blower as there is reasonable low end/low rpm torque to start with, a 4 litre inline six will never have the off idle torque of a large V8 engine. :3gears:

Why mess around if you're after tyre frying torque then go for the Twin Turbo boss. :w00t2:

Peter

  aps said:
Macka the extra cubes of a 5.4 litre V8 always helps the centrifugal blower as there is reasonable low end/low rpm torque to start with, a 4 litre inline six will never have the off idle torque of a large V8 engine. :w00t2:

Why mess around if you're after tyre frying torque then go for the Twin Turbo boss. :3gears:

Peter

<{POST_SNAPBACK}>

twin turbo, twin turbo (twitch twitch) did you say twin turbo (twitch) im

'm not xited (twitch twitch) no no I'm not (twich), lucky this type of xitement dosn't get me horny! the twitch is enough I think?

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