Spark Plug Heat Range For Turbocharged Engine

CarMichael Angelo

my rearend will smell so minty fresh,

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Aug 23, 2014

#1

• Aug 23, 2014

• #1

Trying to decide on which plugs to start off with as far as heat range goes. Naturally, the plug number is nothing anybody here would be familiar with, so I'm just asking in general.
Do I start out w/ a standard heat range plug, or step it one colder for initial start up?

 

madspeed

Colonel Mustard

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#2

• Aug 23, 2014

• #2

You wil want one heat range colder to start

 

jrichker

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#3

• Aug 24, 2014

• #3

Try two ranges colder and .030-.035 plug gap for a start.

Do you have any plans to an alcohol/water injection system to reduce intake manifold temps and possible detonation? If and you haven't already purchased one, I have some ideas for a simple controller that uses input from the TPS sensor and input from an analog MAP sensor.

 

Last edited: Aug 24, 2014

Reactions: skiwesser11 and 7991LXnSHO

mikestang63

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#4

• Aug 24, 2014

• #4

Two steps colder with a smaller gap is what I would do. Always start off conservative. Ultimately it depends on how much boost you plan on running and you'll get a better feel after reading the plugs after it runs for a while .

 

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CarMichael Angelo

my rearend will smell so minty fresh,

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Aug 24, 2014

#5

• Aug 24, 2014

• #5

jrichker said:

Try two ranges colder and .030-.035 plug gap for a start.

Do you have any plans to an alcohol/water injection system to reduce intake manifold temps and possible detonation? If and you haven't already purchased one, I have some ideas for a simple controller that uses input from the TPS sensor and input from an analog MAP sensor.

Click to expand...

A meth inj system is probably looking more likely, I checked my Mallory pump, and it isn't rated to pump E85, so I'll have to fall back to a system like you are talking about.

I am interested in hearing your ideas, a simple system is about all I can muster now that I just spent 600.00 on an oil pump.

 

HotFox

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Aug 25, 2014

#6

• Aug 25, 2014

• #6

Call NGK tech line. They are really good at a starting point.

I would actually start warmer for start up since idle and no load trying to minimize fuel wash to seat rings.

 

madspeed

Colonel Mustard

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#7

• Aug 26, 2014

• #7

I can hear that coversation.... Yeah, I've got a Ford Fairmont with an aussied headed turboe'd straight 6..... Um, sorry sir' that's not in the book

 

HotFox

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#8

• Aug 26, 2014

• #8

They ask plug style, compression ect. If they can get me close from mild to wild tractor engines. I'm sure Mike's no problem!

 

Gearbanger 101

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Aug 26, 2014

#9

• Aug 26, 2014

• #9

I've always gone 2-heat ranges, gapped at about .035 for any power adder application.

 

RangerJoe

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#10

• Aug 26, 2014

• #10

madmike1157 said:

A meth inj system is probably looking more likely, I checked my Mallory pump, and it isn't rated to pump E85, so I'll have to fall back to a system like you are talking about.

I am interested in hearing your ideas, a simple system is about all I can muster now that I just spent 600.00 on an oil pump.

Click to expand...

Man, that's hard to swallow when a HV pump can be had for under $50. I understand why you did it, but I bet it hurt.

Joe

 

Noobz347

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#11

• Aug 26, 2014

• #11

Another vote for two heat ranges and closing the gap.

Additionally,
the word
"indexing"
comes to mind.

 

84Ttop

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#12

• Aug 26, 2014

• #12

2 heat ranges colder here also. Under 20lbs of boost .030 gap

 

7991LXnSHO

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#13

• Aug 26, 2014

• #13

Is the Meth injection system for the car or to keep the owner tweaking things?
Two steps cooler and read plugs sounds great, but cooler than what is a better question!

 

CarMichael Angelo

my rearend will smell so minty fresh,

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Aug 26, 2014

#14

• Aug 26, 2014

• #14

Oh I found the plug, it's just not familiar to me. I'm used to Motorcraft/Autolite numbers on windsor engines. Now I gotta plug that has a number like a Motorcraft AGS 52/42/32C, Autolite 65/64, an NGK BPR5E.
I know that the Motorcraft 52 is gonna be considered stock, so I'll shoot for the 32C then.

Thanks guys.