Ivan
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| posted on 6/6/13 at 04:32 PM |
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Extra torque low down for BEC's - electric supercharger!!!
Without thinking it through fully this might be interesting - also for small engined cars. At least it seems better designed than the normal snake
oil electric supercharges.
http://www.autospeed.com/cms/A_112129/article.html?popularArticle
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MikeRJ
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| posted on 6/6/13 at 05:24 PM |
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You'd need a larger battery than the average bike battery to be able to deliver that sort of current, and the generators on bike engines are
often a bit marginal in terms of output anyway.
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chrism
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| posted on 6/6/13 at 06:26 PM |
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350amp power draw at full acceleration, yeah as said dont think a bike charging system is gonna cover that, Id think that even a car one would only
just be enough to cover that.
[Edited on 6/6/13 by chrism]
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A little hard work never killed anyone, but why take the risk!
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johnH20
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| posted on 6/6/13 at 07:47 PM |
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The idea is not entirely daft. I went to an Imech E presentation from a guy at Ricardo recently and he was demonstrating the benefits of an electric
charger on instantaneous low speed torque. The key difference is that they were using previously charged ( from braking energy ) compact capacitors
to deliver the current. Not exactly DIY as it requires some clever electronics.
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doobrychat
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| posted on 6/6/13 at 07:51 PM |
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brilliant idea.. come up with a charger that kills the whole electrical system as its attempts to spin up... unless you can tow a substation...,
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Dooey99
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| posted on 6/6/13 at 08:22 PM |
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it states it supplies a maximum of 6.6psi, thats not really worth having, 15-25psi would be worth doing but id aim to have 18 for a bike engine and 25
for a car engine
Less weight more speed, more power more speed
If in doubt, give it a clout
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iank
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| posted on 6/6/13 at 08:29 PM |
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It's not designed to be used as a permanent supercharger on a low compression engine, and couldn't work as such as it requires huge
current. What it is designed for is a KERS like system that gives a short time kick of torque to get a heavy car accelerating quickly away with a
small engine. You wouldn't want big PSI as the engine will be a high compression unit.
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Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Ivan
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| posted on 7/6/13 at 07:53 AM |
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quote:
Originally posted by Dooey99
it states it supplies a maximum of 6.6psi, thats not really worth having, 15-25psi would be worth doing but id aim to have 18 for a bike engine and 25
for a car engine
You would be very brave running 25 psi on any engine and 18 psi on a bike engine that is not very carefully and very expensively built to take it -
and the chances are that it would be no pleasure to drive on the track and road because of lag as you need a big turbo (relative to engine size) and a
highly efficient intercooler to achieve it (all of which detract from, and add weight to, the light car principal). The system I mention above is
aimed at providing grunt at low revs for a short period (as someone else mentioned as a Kers type unit) to provide pull away power from a standstill
with small engines and not as a full time supercharger. Hence my thought.
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rdodger
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| posted on 7/6/13 at 08:14 AM |
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quote:
Originally posted by Dooey99
it states it supplies a maximum of 6.6psi, thats not really worth having, 15-25psi would be worth doing but id aim to have 18 for a bike engine and 25
for a car engine
That's a lot!
My MX5 supercharged engine had 7psi and gave 217bhp (standard 140) think that's worth having!
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matt_gsxr
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| posted on 7/6/13 at 08:52 AM |
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Ask a few BEC drivers whether they need more low down torque.
I suspect most are pretty happy.
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