What PLUGS do U run SUPERCHARGED big motors
10-10-2005, 10:52 PM
#13
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Re: What PLUGS do U run SUPERCHARGED big motors
Originally Posted by Bad Girl
Thanks for the feedback. reading the plug isnt the problem. I was looking for the majority plug that seems to pop up in motors more often than any other in this HP range. I run the NGK R5671-8 in Aluminum heads recommended by the motor buider (Pfaff) but also I am in Ohio where water temps are typically cooler than CA. Instead of running the -8 I may decide to go one plug hotter to a -7.
Thanks again
Thanks again
The only time you want to run a hotter plug is if you are having fouling problems at low cylinder pressures/speed. I tend to run -6's up to 600hp, -7's to 700hp, -8's to 900, -9s to 1200hp and -10's above that. This is for gasoline powered engines. The last thing you want is too hot a plug and it turns into a glow plug
R5671 = 3/4 reach gasket plug std tip
R5672 = 3/4 reach gasket plug ext tip
R5673 = 5/8 reach taper seat plug std tip
R5674 = 5/8 reach taper seat plug ext tip
hth's
-DickHead
10-11-2005, 01:48 AM
#14
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Re: What PLUGS do U run SUPERCHARGED big motors
Originally Posted by RichardCranium572
The only time you want to run a hotter plug is if you are having fouling problems at low cylinder pressures/speed. I tend to run -6's up to 600hp, -7's to 700hp, -8's to 900, -9s to 1200hp and -10's above that. This is for gasoline powered engines. The last thing you want is too hot a plug and it turns into a glow plug
R5671 = 3/4 reach gasket plug std tip
R5672 = 3/4 reach gasket plug ext tip
R5673 = 5/8 reach taper seat plug std tip
R5674 = 5/8 reach taper seat plug ext tip
hth's
-DickHead
R5671 = 3/4 reach gasket plug std tip
R5672 = 3/4 reach gasket plug ext tip
R5673 = 5/8 reach taper seat plug std tip
R5674 = 5/8 reach taper seat plug ext tip
hth's
-DickHead
On the cars I usally run the R5674- 8's at the track on a 200 shot and on 475 shot I ran the 9's but that would load up pretty quick.
I am running 6's on the street , the 7's loaded up some with all the putputting around. I have hit the 200 ,but it is real fat and I pull 8 out of it. Lucky I havent lost a eltrode on pump gas when hitting it
lean
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10-11-2005, 03:18 PM
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Re: What PLUGS do U run SUPERCHARGED big motors
I ran the NGK R5671A-9 in a pair of 509,s with 420 Mega Blowers and alum. heads. I just changed to the -8 on one motor and fell in love with them. They have been in a couple of weeks and no fouling issues to date. I'm going to change the other engine as well.
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If it's not a thunder run.............than you're just burnen fuel!!!
If it's not a thunder run.............than you're just burnen fuel!!!
10-11-2005, 04:04 PM
#19
Re: What PLUGS do U run SUPERCHARGED big motors
The NGK plug # is differant than the stock #. I have been getting the NGK's at Napa.
I would think the 41 would be close to a 8. projected tip.
I and running the 42's in my 500efi whipple motors.
You can call NGK at 248-926 6900,I think Richard or John 248-668-8873 is still there?
I would think the 41 would be close to a 8. projected tip.
I and running the 42's in my 500efi whipple motors.
You can call NGK at 248-926 6900,I think Richard or John 248-668-8873 is still there?
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The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
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The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
10-11-2005, 04:22 PM
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Re: What PLUGS do U run SUPERCHARGED big motors
The number I posted is a non projected tip. It is referred to as a "V-Power" or racing plug though.
I have always heard the same thing about projected tip plugs and blower motors. Don't use them.
I get them @ Car Quest for 2.00 each.
I have always heard the same thing about projected tip plugs and blower motors. Don't use them.
I get them @ Car Quest for 2.00 each.
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If it's not a thunder run.............than you're just burnen fuel!!!
If it's not a thunder run.............than you're just burnen fuel!!!
