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Home > General Chat > Lucas dlb101 dwell time in ms for a stand alone build

Craigie-B

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Wootton Bassett

5th Jan, 2012 at 06:39:43pm

Hey guys :)

A friend of mine needs the dwell time for a stand alone build for a lucas dlb101? Been trawling google and can only find angles and not a time in milliseconds.

Cheers

Craig

On 10th Mar, 2012 theoneeyedlizard said:
Hypothetically speaking, where would you stick your nozzle?


On 22nd Jun, 2012 apbellamy said:
my wife doesn't know what.head is never mind compression ratio.

Sam

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Oxford

5th Jan, 2012 at 11:40:48pm

Two variables here really Craig. How many cylinders and whats the peak rpm?

the percentage of time available to charge between when the ignition fires. Normally 30% of that.

4cylinder engine
So lets say 0.3x(720/4) = 54degree
Say the engine runs at 6000rpm.


((6000/60)/2) rpm down to rev per min all over 2 because the distributor runs at half the speed of the crankshaft.

50rev/s. 54 degree dwell.

1/50=0.02 or 20ms.

So (54/360)*20ms=0.003 or 3ms.

So.
(54/360)*(1/((6000/60)/2))=3.0ms
(54/360)*(1/((5000/60)/2))=3.6ms
(54/360)*(1/((4000/60)/2))=4.5ms
(54/360)*(1/((3000/60)/2))=6.0ms
(54/360)*(1/((2000/60)/2))=9.0ms
(54/360)*(1/((1000/60)/2))=18.0ms



Edited by Sam on 5th Jan, 2012.

On 19th Feb, 2011 Miniwilliams said:
OMG Robert that's a big one

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