Whats the difference in superchargers?
Discussion
racebreed said:
what sort of bhp difference is there between the two chargers at standard out of the box boost?
Given that they are both positive displacement blowers, the nominal displacement of the overall engine/blower setup would depend on the gearing. If you ran them at the same gearing the bigger blower would displace proportionally more air so you would get more boost. Power would go up roughly in proportion to the effective displacement.If you dropped the gearing so the bigger blower ran at the same boost as the smaller one you would probably find the bigger blower was slightly more efficient so you would get a very small power gain.
racebreed said:
ok rephrase my question
out of the box what would on standard gearing be a rough power difference on these blowers
out of the box what would on standard gearing be a rough power difference on these blowers
Talk to Roger @ Monkfish or Mark @ Rapid GB. Mark doesn't do the Harrop blowers, but does Magnachargers. They're the same Eaton rotors just in a different package.
GreenV8S said:
racebreed said:
what sort of bhp difference is there between the two chargers at standard out of the box boost?
Given that they are both positive displacement blowers, the nominal displacement of the overall engine/blower setup would depend on the gearing. If you ran them at the same gearing the bigger blower would displace proportionally more air so you would get more boost. Power would go up roughly in proportion to the effective displacement.
If you dropped the gearing so the bigger blower ran at the same boost as the smaller one you would probably find the bigger blower was slightly more efficient so you would get a very small power gain.
Sounds good but in reality at low boost settings (ie in warranty) the 112 produces more torque and therefore feels quicker.
Capacity is key here, the 122 will satisfy an engine that requires more air to maintain a specific boost pressure. Think about it like choosing a central heating boiler for your house, up to say 3 bedrooms the smaller unit will do the job fine but add 2 more bedrooms and you will need the bigger unit to do the same job.
The key to performance is not the size of the blower, it's how much air you can flow through your engine. The 112 will be fine if the engine is otherwise standard but if you plan to add heads, headers and a cam, go for the 122 because it has more puff.
The key to performance is not the size of the blower, it's how much air you can flow through your engine. The 112 will be fine if the engine is otherwise standard but if you plan to add heads, headers and a cam, go for the 122 because it has more puff.
stevieturbo said:
IMO always go bigger....then when you want to upgrade, you arent screwed with a unit that cant cope.
True, given the choice go bigger and I'd buy one of the 2300 TVS blowers if I were buying one now. However, there are a few bargain second hand 112s around at the moment and there's nothing wrong with them on an otherwise stock engine.
GreenV8S said:
The bigger units are also more efficient for a given flow/backpressure. The only advantage of the smaller units (other than physical size and cost) is that they tend to suffer less leakage at very low rpms.
Don't know about the Harrop but the casing on the Maggie 112/122 are the same, the extra puff comes from slightly longer rotors.
Edited by anonymous-user on Saturday 20th September 13:24
Beats me but I can assure you they are, especially on the early MP122. It seems the housing you get depends on what Magnusson had lying about at the time. The later 122 has a little oval badge on the side but some (like mine) don't even have that.
Edited by anonymous-user on Saturday 20th September 13:51
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