GT40P 347 Junkyard Setup

O

oxemoron

New Member

Jul 12, 2003

94

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0

Jan 10, 2006

#1

• Jan 10, 2006

• #1

This upcoming weekend i was going to pick up an explorer engine and build either a 331 or 347. Still trying to figure out if i can make a reliable daily driver 347. I work at a machine shop and planned on fully porting both the intake manifold and heads, although i was considering getting a professional products intake manifold and fully porting that. I would like to build an engine producing 350+ HP and without the use of expensive bolt ons. I figure since i can machine the parts, i might as well save the money. How much power could i expect from setup like that?

 

Look Its Aaron

Your car looks like it came straight from Mexico.

Founding Member

Nov 18, 2001

2,634

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48

Fontana, Cali

Jan 10, 2006

#2

• Jan 10, 2006

• #2

If you plan on going 347 stroker get a nice set of aluminum heads. I don't see the Gt40p's cutting in with that amount of cubes.

 

Modular2v

Founding Member

Jun 30, 2002

3,222

23

99

oklahoma

Jan 10, 2006

#3

• Jan 10, 2006

• #3

if i were you either way i would go with a set of aftermarket heads

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Jan 10, 2006

#4

• Jan 10, 2006

• #4

I would go with a 331. If your on a tight budget go ahead and do what you can with the GT-40Ps, then later on down the road you can upgrade to some better aluminum heads.

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

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89

Dallas, GA

Jan 11, 2006

#5

• Jan 11, 2006

• #5

Do whatever you have to do about the top end, just build the bottom end right, even if it means sacrificing nice heads for OK heads and having a really good bottom end that you can always change out the heads down the road. For a 347, forget the Chinese Performer imposter, look more into a RPMII, systmaxII, or even ported Explorer lower, much better idea, and nessasary if you want 350RWHP. That's just how I would go about it, I could be wrong...

 

N8Miller

I need NOS....make it 2 of the big ones

Founding Member

Jul 26, 2000

2,661

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Kingston, PA, USA

Jan 11, 2006

#6

• Jan 11, 2006

• #6

yep, i would do the P heads only if you have to. Look in the classified ads.... you might be able to find a set of FMS or another aftermarket head that you wotn have to put so much time into.

 

aleborjas

New Member

Sep 11, 2005

610

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Jan 11, 2006

#7

• Jan 11, 2006

• #7

do i need to port some victor JR's heads with a 347 with 10pounds of boost? do i need to port them in exhaust side?

 

V

Viking88

Founding Member

Sep 25, 1999

494

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Bakersfield,Ca

Jan 11, 2006

#8

• Jan 11, 2006

• #8

My last combo was a 347 w/ gt40p heads, cobra intake,and crane 2031 cam. I put down 265rwhp and 340rwtq through an auto. The combo was done by about 5800rpm. I have since switched to TW heads,track heat, and custom cam, it pulls WAY harder from 3k on up, no dyno #'s on new combo but it sure feels a lot stronger. Good luck man!