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-   -   5.7L Hemi w/ two plugs per cylinder (https://classracer.com/classforum/showthread.php?t=28498)

Chris Hill 09-17-2010 09:18 AM

5.7L Hemi w/ two plugs per cylinder
 
On the new 5.7 L hemi, do both plugs fire at the same time or are they stagered? I guess it could be either depending on what you want to acomplish for OEM on the road or racing applications.

Knocky 09-18-2010 09:12 AM

Re: 5.7L Hemi w/ two plugs per cylinder
 
Chris,

Read on the Allpar site 2nd plug fires during the power down stroke
for more complete burn and less emissions, maybe a little more power.
They could use a less restrictive cat that way. Also the 2nd fire uses another coil from the opposite bank...

Mark

340Cuda 09-19-2010 09:34 AM

Re: 5.7L Hemi w/ two plugs per cylinder
 
How were the 2nd Gen dual plug naturally aspirated Hemi's timed?

Both plugs the same or one ahead of the another?

Bill


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