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BigJimnyMeet (North) 2024 (12 Jan 2024)
BigJimnyMeet 2024
14th July 2024
Parkwood Nr. Leeds
14th July 2024
Parkwood Nr. Leeds
Booking now open - Discount for additional vehicles
Click HERE for details
Click HERE for details
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Suppliers/Dealers or anyone selling with a commercial view in mind CANNOT post here unless responding to a specific request of a member in a "wanted" post.
Suppliers include people "breaking for spares" on a regular basis, when purchasing spares members should ask a supplier what they contribute to the running of the forum particularly if contacted by a Private Message
Suppliers or Members who have contributed to the forum can be identifed by the
"Mild" off-road plans for Jimny commuting and playing - Opinions welcome :)
16 Dec 2016 10:43 #175707
by Keithy
Replied by Keithy on topic "Mild" off-road plans for Jimny commuting and playing - Opinions welcome :)
Taking into account pumping losses vs the HP required to drive a supercharger......superchargers are quite inefficient by comparison even without taking into account the inertial mass.
Both methods have one fatal flaw....inefficiency at low rpm....the secret is to mitigate that by choosing the correct ar....one so it's not a lag monster and two to prevent overspeeding if it's too small for the flow.
In modern times we can have external wastegates and dictate the power curve via the ecu by programmed boost control.....having several "maps" and switching between them we can have a set engine speed for maybe rock crawling?
And of course go mental on the loose stuff utilising 4 roosters.
Cam fuel and ignition timing/duration for some dictate that where a standard engine develops power/torque is where it's going to develop more with forced induction....I dare say you could term getting 60bhp where you previously had a lot less as "peaky" but that's where the right foot comes in....or the will to live!
Now to figure out how to get a 60% reduction in low range.....Jimnybits!
A good start for understanding the relationship between power and torque.... here
Both methods have one fatal flaw....inefficiency at low rpm....the secret is to mitigate that by choosing the correct ar....one so it's not a lag monster and two to prevent overspeeding if it's too small for the flow.
In modern times we can have external wastegates and dictate the power curve via the ecu by programmed boost control.....having several "maps" and switching between them we can have a set engine speed for maybe rock crawling?
And of course go mental on the loose stuff utilising 4 roosters.
Cam fuel and ignition timing/duration for some dictate that where a standard engine develops power/torque is where it's going to develop more with forced induction....I dare say you could term getting 60bhp where you previously had a lot less as "peaky" but that's where the right foot comes in....or the will to live!
Now to figure out how to get a 60% reduction in low range.....Jimnybits!
A good start for understanding the relationship between power and torque.... here
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