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DRR Trophy
posted
What plug to use Mopar 500 gas motor?
 
Posts: 19 | Location: st paul mn | Registered: May 05, 2003Reply With QuoteReport This Post
DRR Top Comp
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Autolite



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Dave



F J B

 
Posts: 4447 | Location: Earth | Registered: February 08, 2006Reply With QuoteReport This Post
DRR Trophy
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it has been many years since I ran gas that I simply don't recall what plug number I used. I am thinking J 12 Y champion but hoping some one has info so I can fire it up.
 
Posts: 19 | Location: st paul mn | Registered: May 05, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of sr4440
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what cylinder head is on the engine?


Without data, you’re just another guy with an opinion.
 
Posts: 1297 | Location: TEXAS | Registered: February 07, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of TD6297
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quote:
Originally posted by Duane:
it has been many years since I ran gas that I simply don't recall what plug number I used. I am thinking J 12 Y champion but hoping some one has info so I can fire it up.


Iron heads do use the short reach plugs like the J12Y. I'm not sure about the TF or Indy but I know that Eddy heads are a long reach. So as sr4440 mentioned, which heads?
 
Posts: 149 | Location: Canada | Registered: April 17, 2013Reply With QuoteReport This Post
DRR Trophy
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For my racecar, I used to use AR3934 and AR3933, until I switched to a comparable NGK plug. Very affordable if you buy in bulk from Advance Auto with coupon codes.

Aluminum headed 400 @ 12:1 comp, worked well with both 110 and E85.
 
Posts: 119 | Location: Outside | Registered: May 08, 2014Reply With QuoteReport This Post
DRR Sportsman
Picture of sr4440
posted Hide Post
quote:
Originally posted by TD6297:
quote:
Originally posted by Duane:
it has been many years since I ran gas that I simply don't recall what plug number I used. I am thinking J 12 Y champion but hoping some one has info so I can fire it up.


Iron heads do use the short reach plugs like the J12Y. I'm not sure about the TF or Indy but I know that Eddy heads are a long reach. So as sr4440 mentioned, which heads?


FYI the 440-3 engine (motor home) uses a 5/8 tapered seat RV9YC. So knowing which head he has would be helpful.

Joe

This message has been edited. Last edited by: sr4440,


Without data, you’re just another guy with an opinion.
 
Posts: 1297 | Location: TEXAS | Registered: February 07, 2003Reply With QuoteReport This Post



DRR Trophy
Picture of Tom H
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NGK-XR5/3332 on "most" steel heads, NGK-4554 (5671A-8) on aluminum. These are a good choice on each given type of head.
 
Posts: 62 | Location: wisc | Registered: January 25, 2016Reply With QuoteReport This Post
DRR Sportsman
Picture of TD6297
posted Hide Post
quote:
Originally posted by sr4440:
quote:
Originally posted by TD6297:
quote:
Originally posted by Duane:
it has been many years since I ran gas that I simply don't recall what plug number I used. I am thinking J 12 Y champion but hoping some one has info so I can fire it up.


Iron heads do use the short reach plugs like the J12Y. I'm not sure about the TF or Indy but I know that Eddy heads are a long reach. So as sr4440 mentioned, which heads?


FYI the 440-3 engine (motor home) uses a 5/8 tapered seat RV9YC. So knowing which head he has would be helpful.

Joe


wow, I have never seen that, that is very interesting. Show even more that the actual head style is necessary
 
Posts: 149 | Location: Canada | Registered: April 17, 2013Reply With QuoteReport This Post
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