GT40 intake and heads questions...

KingDiamond

New Member

Mar 9, 2003

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Chicago, IL

Mar 23, 2004

#1

• Mar 23, 2004

• #1

I'm going to put in a KB 1500 supercharger sometime before next winter but I want to upgrade the heads and intake. There is a KB 1500 made for the GT-40 lower so I'm thinking about going with a GT40 intake and GT40P heads. I am budget minded so that's why I want the GT40P heads.

Can I use the GT40 lower with the stock upper? I will be removing the upper when I will have the KB supercharger so I don't want to spend $500 on a full GT40 intake when I can buy the lower on ebay for $150.

Also will the heads and intake just bolt on or will other things have to be changed like pushrods?

I will probably change the injectors to better ones when I do the head swap. Will 30 lb injectors be good for the KB 1500 @ 6 to 8 psi?

Also is the Pro-M a good MAF to get with the injectors?

 

95snoozer

Active Member

Dec 14, 2002

2,572

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48

RCR

Mar 23, 2004

#2

• Mar 23, 2004

• #2

no no yes and yes

the lower and stock will not mate up
you need headers for the Ps Mac long tubes or p shorties
yes pro M is good

 

1105

I AM the random post master...bow down

May 3, 2003

3,841

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Daytona Bch, FL

Mar 23, 2004

#3

• Mar 23, 2004

• #3

I'm gonna have to dissagree. You CAN use your current headers or just normal headers for the GT40P heads BUT you're going to need to make something to be able to get the spark plugs out. A cut socket will work great. They do work it just might be a PITA

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

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Saint Louis, MO

Mar 23, 2004

#4

• Mar 23, 2004

• #4

To get the most from that lower intake with the KB, you should port it.

 

X

xxtavixx

New Member

Sep 6, 2003

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Jacksonville, Fl

Mar 23, 2004

#5

• Mar 23, 2004

• #5

would you really notice the difference between the stock lower and the GT40 lower intake manifold with the KB supercharger?

 

tmoss

Gettin Wired

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Jun 28, 2001

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Mar 23, 2004

#6

• Mar 23, 2004

• #6

Depending on the heads used - you bet.

 

KingDiamond

New Member

Mar 9, 2003

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Chicago, IL

Mar 23, 2004

#7

• Mar 23, 2004

• #7

KB says there's more torque with the GT40 lower.

 

1105

I AM the random post master...bow down

May 3, 2003

3,841

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0

Daytona Bch, FL

Mar 23, 2004

#8

• Mar 23, 2004

• #8

Compair the ports on a stock intake to the GT40... I'm sure you'll know which one to get

 

X

xxtavixx

New Member

Sep 6, 2003

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Jacksonville, Fl

Mar 23, 2004

#9

• Mar 23, 2004

• #9

How much power are we talking here? Enough to make you really want to spend the extra money for the GT40 Intake? I dont know of anywhere you can purchase just a GT40 lower intake to be honest, But I don't own a Stang ...yet

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

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Saint Louis, MO

Mar 23, 2004

#10

• Mar 23, 2004

• #10

Don't even use a stock lower - get one ported to use with the KB - same goes for the GT40 lower.