GT-40P HEADS

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bz393

New Member

Sep 24, 2006

29

0

2

maryland

Apr 11, 2007

#1

• Apr 11, 2007

• #1

Im building a 306 and have gt-40p heads. Im taking the heads to the machine shop to have them gone through but i want to have them milled to get a little more power from them. How much can i get milled off without having piston to valve clearance problems? I will either be using the stock speed density cam or an e-303 cam. Any help is greatly appriciated.

 

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lang williams

New Member

Jun 11, 2003

567

0

0

cleveland, oh

Apr 11, 2007

#2

• Apr 11, 2007

• #2

You might have problems with speed density an the E cam...I've talked to one guy who has one in a 5 sp an says its ok, just a stumbling idle...Every one says you should always check p-t-v clearance cuz every motor is different but I would guess you'd be ok taking 30 thousands off.

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Apr 12, 2007

#3

• Apr 12, 2007

• #3

mine were milled 30 thousands with the stock cam and pushrods

 

J

jake_1977_77

Member

Nov 9, 2005

33

1

6

Columbus, Georgia

Apr 12, 2007

#4

• Apr 12, 2007

• #4

I have a E303 cam, with stock heads, I sometimes have problems with idling, especially after downshifting, the car even dies sometimes, what is the cause of that? I am looking to getting some twisted Wedge heads? anybody have any pointers?

 

carbed87

Member

Jun 5, 2005

215

0

16

Apr 12, 2007

#5

• Apr 12, 2007

• #5

if it's speed density, that'd be your problem right there