Your thoughts on the best spark plug for a Hipo 383??

[DPL]

My 383 is ready to drop in.  Completely rebuilt wioth performance everything, stock appearance but go go go.  It was dyno'd with Chamion spark plugs but I don't know the actual model.

What would you suggest I use?

Engine is 10.5-1 compression, 425 horsie 495 ft lbs of torque on the dyno. 

Thanks!

[Just 6T9 CHGR]

I am running the NGK's in my 440 with good results

[mikepmcs]

couple threads that hit on this a little.

I run NGK XR5's per Ron's suggestion.  No issues.

I believe Chryco like's Champion and they are also a good plug as I never really had issues with them over the years.

http://www.dodgecharger.com/forum/index.php/topic,18899.0.html

http://www.dodgecharger.com/forum/index.php/topic,16586.0.html

http://www.dodgecharger.com/forum/index.php/topic,13387.0.html

http://www.dodgecharger.com/forum/index.php/topic,10741.0.html

v/r
Mike

[DPL]

as always, thanks to everyone for quick and detailed assistance!

[Chryco Psycho]

I use the Champ RJ12YC gapped .035 with stock coil or .045 with high output coil 

[RallyeMike]

Would you mind describing the build you have that hit 425 hP at what RPM? Just curious.

RMike

[DPL]

I bought the motor from a builder in California - here's the eBay link:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=012&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=220077594285&rd=1

The dyno sheet shows 423HP at 5500RPM, 495 ft lbs of torque at 4000 RPM. 

Darren

[RallyeMike]

2700 bucks - good deal !

[mikepmcs]

AMEN.  Super Sweet Deal!!!

[my73charger]

I use the Champ RJ12YC gapped .035 with stock coil or .045 with high output coil 

Thats what I use, good results to.