347 vs 347 big bore

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Oct 21, 2010 | 02:13 PM

nightmare90gt

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2nd Gear Member

Joined: Sep 2010

Posts: 236

From: florida

347 vs 347 big bore

what is the diff. between the 347 big bore and the 347 i know that the crank stroke is different but what else.

Oct 21, 2010 | 05:21 PM

sn95_331_GT_ yellow

5th Gear Member

Joined: Mar 2008

Posts: 2,394

From: CT

big bore = 3.25" stroke, 4.125" bore
standard = 3.4" x 4.030"

STFU and GTFO = 3.4 x 4.125" = 363 CID

Oct 21, 2010 | 06:40 PM

nightmare90gt

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Joined: Sep 2010

Posts: 236

From: florida

363 wouldn't be a good match to my heads right

Oct 21, 2010 | 06:45 PM

68CSTANG

3rd Gear Member

Joined: Jun 2007

Posts: 816

From: Illinois

Quote:

Originally Posted by nightmare90gt

363 wouldn't be a good match to my heads right

170cc TW's?

Oct 21, 2010 | 08:30 PM

nightmare90gt

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Joined: Sep 2010

Posts: 236

From: florida

yes i have tf 170cc tw heads

Oct 22, 2010 | 07:07 AM

AdderMk2

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Posts: 22,374

From: Lil' Rhody

i wouldnt use them on anything bigger than 310... but thats just me.

the biggest difference between a 347 stock bore and 347 big bore, is that you cant use the big bore kit in a stock block.

Oct 22, 2010 | 08:37 PM

nightmare90gt

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Joined: Sep 2010

Posts: 236

From: florida

then what heads would you put on a 347

Oct 22, 2010 | 10:05 PM

AdderMk2

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Posts: 22,374

From: Lil' Rhody

my 347 has a set of 190cc canfield heads which have been worked out to about 202cc

Oct 22, 2010 | 11:04 PM

nightmare90gt

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Joined: Sep 2010

Posts: 236

From: florida

what power are you making

Oct 23, 2010 | 06:41 AM

#10

AdderMk2

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Joined: Dec 2005

Posts: 22,374

From: Lil' Rhody

in the 400 range

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