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  #1  
Old 08-11-2012, 02:13 AM
Vmo Vmo is offline
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Default 8251 or 8261 for Grid

I'm going to replace my 7AL-3 system with a Grid. I see that the 8251 or 8261 are the recommend coils. What is the difference between them? I have looked at the specifications, and they look about the same.

I guess I do not really understand the technical specification numbers.

Thanks.
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  #2  
Old 08-13-2012, 08:27 AM
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msdtech1955 msdtech1955 is offline
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whats your engine combo?
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  #3  
Old 08-13-2012, 09:12 AM
Vmo Vmo is offline
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555 BBC with 2 stages of nitrous.
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Old 08-13-2012, 09:43 AM
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then you would want the 8261 ( more current) for the cylinder pressure
you have.
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  #5  
Old 08-13-2012, 11:32 AM
Vmo Vmo is offline
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Would you be kind enough to explain the differences in the 2 coils so that I can learn about current. What would the 8251 be best for?
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  #6  
Old 08-13-2012, 12:03 PM
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here is the coil current chart

coil current.jpg

coil current-jp.JPG
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  #7  
Old 08-13-2012, 03:19 PM
Vmo Vmo is offline
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Thanks. I was wondering about current, because I thought that the rate that a coil could re-charge and fire again vs.overall output was the trade off.

Would the 8251 coil be adequate for my 434 normal aspirated 14:1 compression motor that I spin to 7400 rpm? I am going to use the -7AL3 ignition for it. Or would I be better of with another 8261

Both cars are strictly 1/4 mile cars
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  #8  
Old 08-14-2012, 06:49 AM
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for the most bang for buck...the 61 would be a better choice.
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