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Old 12-05-2011, 10:57 PM   #1
rawhide
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Default Re: 5TH Gen COPO Camaro

Quote:
Originally Posted by Troy Pourciau View Post
427
327/2.9
327/4.0
Suggested class
A Stock
AA Stock
A Super Stock
Cubic inches
427 (7.0L)
327 (5.3L)
327 (5.3L)
Block
LS7
LS9
LSX
Block material
Aluminum
Aluminum
Cast iron
Bore x Stroke (in.)
4.125 x 4.100
4.065 x 3.150
4.065 x 3.150
Crank
Forged steel
Forged steel
Forged steel
Rods
H-beam
H-beam
H-beam
Pistons
Forged dome
Forged dome
Forged dome
Compression ratio
13.5:1
10.2:1
10.2:1
Heads
LS7
LS7
LS7
Induction
natural
boosted
boosted
Intake
Holley 2.9L
Whipple 4.0L
Whipple
Camshaft type
Hydraulic roller
Hydraulic roller
Hydraulic roller
Cam duration (deg.)
233/276 @ 50
244/255 @ 50
244/255 @ 50
Cam lift (in.)
.595
.650
.650
when I take my shoes and socks off and do the math the 427 with a 4.125" bore and 4.100" stroke is 438 cubic inches. The Factorys are even taking care of the cheating for us now.
regards, Roland
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Old 12-05-2011, 11:08 PM   #2
Ed Wright
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Default Re: 5TH Gen COPO Camaro

Yep, your correct. 438"
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Old 12-05-2011, 11:14 PM   #3
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Default Re: 5TH Gen COPO Camaro

Quote:
Originally Posted by rawhide View Post
when I take my shoes and socks off and do the math the 427 with a 4.125" bore and 4.100" stroke is 438 cubic inches. The Factorys are even taking care of the cheating for us now.
regards, Roland

Some prefer to call it "Pushing the Envelope". 8-)
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Old 12-05-2011, 11:38 PM   #4
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Default Re: 5TH Gen COPO Camaro

Its NHRAs new math
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Old 12-06-2011, 05:27 AM   #5
Troy Pourciau
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Default Re: 5TH Gen COPO Camaro

Video of the first run.

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Old 12-06-2011, 09:49 AM   #6
Mike Fuller
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Default Re: 5TH Gen COPO Camaro

I'm guessing that GM will submit this combo to NHRA with a 305 HP rating.

http://www.competitionplus.com/drag-...po-camaro-test
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Old 12-06-2011, 12:00 PM   #7
Troy Pourciau
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Default Re: 5TH Gen COPO Camaro

LOL ! !
quote from another class racer.

hmmm, 16 sec video, seems to "leave" at 8 sec, lifts at finish line (or sooner?), at 16=8?
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Old 12-06-2011, 12:14 PM   #8
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Default Re: 5TH Gen COPO Camaro

Troy, you seemed to have made a mistake on the spec sheet. The hp numbers were incorrectly labelled as cam duration;
Cam duration (deg.)
233/276 @ 50
244/255 @ 50
244/255 @ 50

is actually
HP Rating (net)
233hp/276tq@ 5000rpm
244hp/255tq@5000rpm
244hp/255tq@5000rpm

Although I do understand chev has been waiting to see how the car performs before it announces the hp numbers so weight can be adjusted to beat the mustang....or try anyway. LOL!
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