GT40 heads questions

slschembari · February 14th, 2011, 09:41 PM

I am looking into buying a set of GT40 heads for my 1993 GT but I really don't know too much about heads. My motor is stock as of now, but I'm wondering what else i would need to change in order for these to work. I've heard springs but I don't want to get into this without knowing what I'm doing first, so any help would be appreciated. Thanks a lot.

Black89gt · February 14th, 2011, 09:54 PM

Only thing that would help benefit w/ them heads would be a gt40 or good aftermarket intake. If youre keeping your stock cam them stronger springs arent needed. If you swap the cam to a decent aftermarket one i would recommend springs.

slschembari · February 14th, 2011, 10:00 PM

Oh sorry, I forgot to mention that I had the BBK SSI intake. I'm going to get a cam eventually down the line, but I dont know which kind I want yet. Its for my every day car, I just want some extra power to keep up with my dads M3

1slo5.0 · February 15th, 2011, 08:18 AM

Originally Posted by slschembari

I am looking into buying a set of GT40 heads for my 1993 GT but I really don't know too much about heads. My motor is stock as of now, but I'm wondering what else i would need to change in order for these to work. I've heard springs but I don't want to get into this without knowing what I'm doing first, so any help would be appreciated. Thanks a lot.

New or used heads? Stock GT40 heads or aftermarket aluminum? If they are used they will need to be rebuilt most likely.

Originally Posted by slschembari

Oh sorry, I forgot to mention that I had the BBK SSI intake. I'm going to get a cam eventually down the line, but I dont know which kind I want yet. Its for my every day car, I just want some extra power to keep up with my dads M3

Depending on what year M3, you will probably need alot more than GT40 heads and that BBK intake to get anywhere near keeping up with him.

slschembari · February 15th, 2011, 07:28 PM

I would most likely go with a new set of aluminum assuming that doesn't mean I have to change anything else.

ryanw · February 15th, 2011, 07:49 PM

M3 are light. My dad had a 2000 M5 rated at 398Hp i think. it was really quick

slschembari · February 15th, 2011, 11:08 PM

Its an E46 convertible. Its not as fast as youd think off the line but its still faster than my car. Ive got a few other things as well but im just talking about from red lights.

fogged306 · February 16th, 2011, 09:37 AM

Originally Posted by slschembari

I would most likely go with a new set of aluminum assuming that doesn't mean I have to change anything else.

If you're going to spend the money, there's far better heads than aluminum GT-40's. Trick Flow, Canfield, AFR and Edelbrock vic jr's will all make more power than them and you can find them used for cheaper than a new set of the GT-40's

1slo5.0 · February 16th, 2011, 11:41 AM

Originally Posted by fogged306

If you're going to spend the money, there's far better heads than aluminum GT-40's. Trick Flow, Canfield, AFR and Edelbrock vic jr's will all make more power than them and you can find them used for cheaper than a new set of the GT-40's

slschembari · February 16th, 2011, 08:07 PM

Alright thanks a lot. Which would you recommend and how much is a good price for a set of used?

February 14th, 2011, 09:41 PM	#1
slschembari Newbie Join Date: Nov 2010 Posts: 18 iTrader: 0 reviews	GT40 heads questions I am looking into buying a set of GT40 heads for my 1993 GT but I really don't know too much about heads. My motor is stock as of now, but I'm wondering what else i would need to change in order for these to work. I've heard springs but I don't want to get into this without knowing what I'm doing first, so any help would be appreciated. Thanks a lot.

February 15th, 2011, 07:49 PM	#6
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,061 iTrader: 0 reviews	M3 are light. My dad had a 2000 M5 rated at 398Hp i think. it was really quick __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

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February 14th, 2011, 09:54 PM	#2
Black89gt Newbie 1989 Mustang GT Join Date: Feb 2011 Location: Caledonia Mississippi Posts: 12 iTrader: 0 reviews	Only thing that would help benefit w/ them heads would be a gt40 or good aftermarket intake. If youre keeping your stock cam them stronger springs arent needed. If you swap the cam to a decent aftermarket one i would recommend springs.

February 14th, 2011, 10:00 PM	#3
slschembari Newbie Join Date: Nov 2010 Posts: 18 iTrader: 0 reviews	Oh sorry, I forgot to mention that I had the BBK SSI intake. I'm going to get a cam eventually down the line, but I dont know which kind I want yet. Its for my every day car, I just want some extra power to keep up with my dads M3

February 15th, 2011, 07:28 PM	#5
slschembari Newbie Join Date: Nov 2010 Posts: 18 iTrader: 0 reviews	I would most likely go with a new set of aluminum assuming that doesn't mean I have to change anything else.

February 15th, 2011, 11:08 PM	#7
slschembari Newbie Join Date: Nov 2010 Posts: 18 iTrader: 0 reviews	Its an E46 convertible. Its not as fast as youd think off the line but its still faster than my car. Ive got a few other things as well but im just talking about from red lights.

February 16th, 2011, 08:07 PM	#10
slschembari Newbie Join Date: Nov 2010 Posts: 18 iTrader: 0 reviews	Alright thanks a lot. Which would you recommend and how much is a good price for a set of used?

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