How much hp will a 347 hold?

deadly97snake

Founding Member

Mar 21, 2001

592

0

0

Manchester, NH

Apr 3, 2004

#1

• Apr 3, 2004

• #1

I'm not talking about a R or a dart block, but a regular 302 block from the factory with forged internals etc...

 

TrueBlue95GT

Member

Sep 29, 2003

966

0

16

Connecticut

Apr 3, 2004

#2

• Apr 3, 2004

• #2

I've heard about 450hp with the stock block, but I may be on crack.

 

mto502

Founding Member

Sep 18, 2002

357

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0

Ancaster, Ontario

Apr 3, 2004

#3

• Apr 3, 2004

• #3

TrueBlue95GT said:

I've heard about 450hp with the stock block, but I may be on crack.

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I was on the phone yesterday talking to Kennedy Performance in New York and that was what they said as well. That would be 450 rwhp.

 

94Blue302GT

Member

Oct 20, 2003

704

3

19

Chicago

Apr 3, 2004

#4

• Apr 3, 2004

• #4

Is that with or without power adder? I'd want more than 450 before stuff flew apart

 

mto502

Founding Member

Sep 18, 2002

357

0

0

Ancaster, Ontario

Apr 3, 2004

#5

• Apr 3, 2004

• #5

With or without a power adder doesn't make a difference. Regardless of if it's normally aspirated or blown the block will handle that much horsepower...... so I've been told.

 

DavidF

New Member

Nov 19, 2003

158

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0

Ventura, Ca

Apr 3, 2004

#6

• Apr 3, 2004

• #6

mto502 said:

I was on the phone yesterday talking to Kennedy Performance in New York and that was what they said as well. That would be 450 rwhp.

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So thats actually around 540fwhp. given 20% drive train loss?

 

mto502

Founding Member

Sep 18, 2002

357

0

0

Ancaster, Ontario

Apr 3, 2004

#7

• Apr 3, 2004

• #7

DavidF said:

So thats actually around 540fwhp. given 20% drive train loss?

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I suppose if you're an automatic I'd go 20% but closer to 15% for a manual, so yes. Sounds like a lot doesn't it?

 

Babyduck

New Member

Mar 7, 2004

49

0

0

Cocoa Bch, FL

Apr 3, 2004

#8

• Apr 3, 2004

• #8

turbo... 500-550
blower 450-500

keep the revs low, balanced rotating assymbly, safe a/f, and go easy on the timing, and it'l live a while.

 

DougNuts

Founding Member

Jul 11, 2000

2,596

0

47

Georgetown Ky

Apr 3, 2004

#9

• Apr 3, 2004

• #9

A properly balance assembly will help it live longer for sure. But like the other guys said, the block starts to flex around 450hp, so I've been told.

 

6

67stang390

New Member

May 29, 2003

379

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Seattle, WA(home) ASU(college)

Apr 4, 2004

#10

• Apr 4, 2004

• #10

I've got a main cap girdle on my stock block. Supposedly, that helps out to equally distribute stress so the block can take a little more power. Who knows how true that is, though. At least that way when I hit it with the squeeze all the pieces will stay together when the block cracks...