flatline74
Active Member
- Messages
- 27
- Location
- Huntsville, Alabama
I am going to replace the torch plug with a ngk, which plug should I be using?
Spark Plug for the 30.5?
- Thread starter flatline74
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
links, including eBay, Amazon, and others.
NitroBurn1
Active Member
- Messages
- 34
- Location
- Colorado
pablo
Well-Known Member
- Messages
- 1,787
- Location
- slipknot central
cmr 7h, the torch plugs are bad to say the least.
Last edited:
hotrod45
Well-Known Member
- Messages
- 337
- Location
- sarasota, fl. previous st p/mpls
plugs
ngk all the way! ditch the torch
ngk all the way! ditch the torch
OuttaLuck
Well-Known Member
- Messages
- 1,740
NGK IRIDIUM CR7HIX spark plug
http://shopping.netsuite.com/s.nl/c.885035/n.1/it.A/id.1383/.f
NGK CMR7H Spark Plug
http://shopping.netsuite.com/s.nl/c.885035/n.1/it.A/id.1381/.f
http://shopping.netsuite.com/s.nl/c.885035/n.1/it.A/id.1383/.f
NGK CMR7H Spark Plug
http://shopping.netsuite.com/s.nl/c.885035/n.1/it.A/id.1381/.f
atom3624
Well-Known Member
- Messages
- 8,284
- Location
- Cold, wet, windy St Helens, U.K.
The number is vaguely similar to nitro engines - with COLD, MEDIUM and HOT plugs, selected according to ambient conditions.
It doesn't appear to be as critical as with nitro engines - if your engine's normal plug is a medium-hot, and it's running hot, but the fuel's right, you drop to a medium.
I forget which way around it is, I think the 6 is cooler than the 7, but I may have it the wrong way around.
Whatever, almost everyone seems to default to the '7'.
Al.
It doesn't appear to be as critical as with nitro engines - if your engine's normal plug is a medium-hot, and it's running hot, but the fuel's right, you drop to a medium.
I forget which way around it is, I think the 6 is cooler than the 7, but I may have it the wrong way around.
Whatever, almost everyone seems to default to the '7'.
Al.
Baja_Matt
Well-Known Member
- Messages
- 123
- Location
- Wellsburg, Iowa
Run the 7. Typically you would drop to the next colder heat range only if you were adding nitrous, running a turbo or using a super charger. NGK says to drop 1 heat range for every 75-100hp you add to the modified engine. I know we are talking alot less HP here and small engines, but stick with the stock recommended heat range, your engine will be plenty happy.