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post #1 of 24 Old May 31st, 2016, 10:54 PM Thread Starter
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What spark plugs to use in iron gt40s with boost

I'm curious to know what spark plugs I should be using with boost in my car?

I have the 3 bar iron gt40s not gt40(p)

Thanks

At the moment I'm just using regular copper plus plugs gapped at .035
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post #2 of 24 Old June 1st, 2016, 06:09 PM Thread Starter
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Well this place is dead.

I ended up going with autolites 103s
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post #3 of 24 Old June 1st, 2016, 08:31 PM
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Which 103s did you get? It looks like there are a few 103's.
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post #4 of 24 Old June 2nd, 2016, 01:12 AM Thread Starter
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Which 103s did you get? It looks like there are a few 103's.
Went with these
https://www.amazon.ca/Autolite-103-C.../dp/B000C21GKO

From my local parts store they were $2.50 a piece and I believe they're the same ones used in the lightnings stock.
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post #5 of 24 Old June 2nd, 2016, 04:14 AM
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Im sure theyd be fine with a tight gap. My only concern would be that the heads will retain heat and might cause some spark knock since theyre iron. As long as you gap them right youll be good to go. And dont forget to drive around some and pull the plugs to see how its running.
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post #6 of 24 Old June 2nd, 2016, 05:52 PM Thread Starter
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Im sure theyd be fine with a tight gap. My only concern would be that the heads will retain heat and might cause some spark knock since theyre iron. As long as you gap them right youll be good to go. And dont forget to drive around some and pull the plugs to see how its running.
Okay perfect,
Much appreciated
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post #7 of 24 Old June 4th, 2016, 03:34 PM
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No problem and post up how it runs after you get it all together. I watch my sub'd threads so Ill reply.
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post #8 of 24 Old June 4th, 2016, 04:46 PM
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The 103s served me well in the Fukus. I gapped them at .030". I'm a bigger fan though of recessed tip copper plugs with boost such as the NGK BR6EF and BR7EF plugs.

1993 Camaro bracket car
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post #9 of 24 Old June 6th, 2016, 12:26 AM Thread Starter
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https://youtu.be/4_Vkfv6fLzs


Here you guys go, this is after lots of work by myself,
At the moment I have tr55s installed and the tuner told me to bring the 103s with me.

I'm also working out some running hot issues,

From what I've been reading they don't like front mount intercooler because they block the rad.

So tuner told me to put a 160 tstat in and he'll tune for it.
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post #10 of 24 Old June 6th, 2016, 12:37 AM
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You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
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post #11 of 24 Old June 6th, 2016, 12:07 PM Thread Starter
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You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
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post #12 of 24 Old June 6th, 2016, 01:40 PM
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Quote:
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Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/
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post #13 of 24 Old June 6th, 2016, 01:43 PM
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I'd keep the stock thermostat and upgrade the cooling system. A 160*F thermostat won't keep it from overheating, it'll just take longer to warm up.

At 160*F the rings aren't fully expanded and sealing, the oil isn't retaining enough heat to burn out contaminants, and you're losing more heat energy from the cylinders into the cooling system. With the coolant temp at 160-170*F, the oil is only at 200-210*F (typically) which means it's not hot enough to burn out any condensation in the crankcase. This was a common problem with older cars that ran the 160*F stats all the time. You need above 212*F to burn out condensation. I like cruising oil temps between 215-230*F, around town at 230-250*F, and spirited/racing at 250-280*F. Hot oil is clean oil is happy oil. The lower temp stat also reduces combustion temps in the cylinders since more heat is being transferred out. This is lost heat energy that would otherwise be pushing the piston down the bore. This is the same way that aluminum heads make less power vs iron heads due to the aluminum pulling more heat out of the cylinders. (Everything else equal)

Keep the factory thermostat and upgrade the fan. I don't like mechanical fans. They rob too much power and don't cool as good as even a middle of the road electric fan.

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post #14 of 24 Old June 12th, 2016, 05:58 PM
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Quote:
Originally Posted by Mr_Calypso View Post
I'm curious to know what spark plugs I should be using with boost in my car?

I have the 3 bar iron gt40s not gt40(p)

Thanks

At the moment I'm just using regular copper plus plugs gapped at .035
I have procharger and before MSD 6AL and demon coil and 9 mm wires, I had autolite 3923 gapped at .025. After getting the MSD box, demon coils and 9mm wires, I switched to NGK V-Power TR6 at .030 which was recommendation by Procharger and it has waken my car up and I'm loving it.
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post #15 of 24 Old June 20th, 2016, 05:02 PM Thread Starter
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Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/

They fit perfectly, very little modification needed.
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post #16 of 24 Old June 21st, 2016, 10:20 AM
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Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/

They fit perfectly, very little modification needed.
Nice! Ive been thinking of doing this to my 85 ltd. I think the radiator is the same size as the one in the fox mustang so it should fit mine too. As long as it is Im going to the u pull and getting one!
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post #17 of 24 Old June 21st, 2016, 01:46 PM Thread Starter
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Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/

They fit perfectly, very little modification needed.
Nice! Ive been thinking of doing this to my 85 ltd. I think the radiator is the same size as the one in the fox mustang so it should fit mine too. As long as it is Im going to the u pull and getting one!

I couldn't believe how much air it pulls lol, but definitely worth it and thanks for the idea man,
I went to my local wreckers and they charged me $75 for one that worked, or $50 for one if I pulled it myself.
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post #18 of 24 Old June 21st, 2016, 05:17 PM
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Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/

They fit perfectly, very little modification needed.
Nice! Ive been thinking of doing this to my 85 ltd. I think the radiator is the same size as the one in the fox mustang so it should fit mine too. As long as it is Im going to the u pull and getting one!

I couldn't believe how much air it pulls lol, but definitely worth it and thanks for the idea man,
I went to my local wreckers and they charged me $75 for one that worked, or $50 for one if I pulled it myself.
No problem man! Ive been looking to do this swap myself. How did you wire it up?
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post #19 of 24 Old June 22nd, 2016, 02:15 AM Thread Starter
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Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
Quote:
Originally Posted by Mr_Calypso View Post
Quote:
Originally Posted by 07gtS197 View Post
You can swap to a contour dual fan setup to help move more air. Are you using the stock fan or electric?
Stock fan still, but it does nothing for me.

I'll have to go too a electric fan for sure just need the car to be good at the dyno Saturday.

Contours had dual electric fans?
I'll have to look into that, is there a certain model? Svt?
I thought it was just the svt but according to this article a few of them had it not just the svt contour. Oh and deleting the mechanical fan will help with parastic drag and you wont need to keep replacing the stupid fan clutch after it keeps going out lol. The only thing I like about the mechanical fan is that its always spinning so its always doing something.

Heres the article
http://www.mustangandfords.com/how-t...c-fan-upgrade/

They fit perfectly, very little modification needed.
Nice! Ive been thinking of doing this to my 85 ltd. I think the radiator is the same size as the one in the fox mustang so it should fit mine too. As long as it is Im going to the u pull and getting one!

I couldn't believe how much air it pulls lol, but definitely worth it and thanks for the idea man,
I went to my local wreckers and they charged me $75 for one that worked, or $50 for one if I pulled it myself.
No problem man! Ive been looking to do this swap myself. How did you wire it up?

I removed the resistor from the fans as they're two speed, I wanted mine on high at all times so I wired both fans together, negitive from the fans went to the frame of the car and positive went to the 40amp relay I bought, from the relay positive went through a 30amp fuse to positive on the starter solenoid.

Ground from the relay also went to the frame of the car,
Another connection went from the relay to the temperature switch I bought or sending unit, from the sending unit it then went to a ignition on source, I think I used the wiper motor.

I have a diagram at home with numbers and everything I'll post it for you.

The sending unit I'm using is on at 180 off at 165.

I should be able to stay nice and cool now.
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post #20 of 24 Old June 22nd, 2016, 02:19 AM Thread Starter
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Forgot to mention where I put the temperature switch or sending unit,

I ended up drilling and taping my thermostat housing for it.
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