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11-13-2008, 01:45 PM
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#1
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Member
Join Date: Oct 2006
Location: New Smyrna Beach & West Milford, N.J.
Posts: 804
Name :
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1998 427 Vette
This past weekend I watched "Pinks All Out" from Atlanta.
The winner was a 1998 Vette. The owner said that he had a boar out 427 engine.
Does that mean that he increased the cylinder displacement to 427 cubic inches? If that is the case, I assume he had to install bigger pistons and rings, right? Would he have to change the cam and lifters also?
I also wonder what the increase in horse power was.
Just curious. 
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11-13-2008, 03:49 PM
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#2
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Senior Member
Join Date: Mar 2007
Location: On the road
Posts: 2,117
Name :
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Most likely he was refering to the infamous 427 "big block" engine from the 60's. I had a 427 block with a 454 crank that was bored to 462 cubic inches in a 1978 Z28. It was making 500+ HP back in 1982 with a few speed parts.
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11-13-2008, 05:38 PM
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#3
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Senior Member
Join Date: Apr 2007
Location: Washington MO
Posts: 1,569
Name : Rick Hice
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I don't know if it's a big block or an LS7. The class he runs does not allow electronics.
MTI Racing Team
Owned by Paul Smith Sr
Driven by Paul Smith Jr
http://www.youtube.com/watch?v=HVmso...eature=related
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Rick
Last edited by C5Rick; 11-13-2008 at 07:30 PM.
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11-13-2008, 06:13 PM
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#4
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Member
Join Date: Oct 2006
Location: New Smyrna Beach & West Milford, N.J.
Posts: 804
Name :
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Quote:
Originally Posted by C5Rick
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That's the car. Man, what beautiful music when he presses the pedal to the metal. 
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11-14-2008, 12:51 PM
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#5
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Senior Member
Join Date: May 2006
Location: Ft Walton Beach, Fl.
Posts: 1,405
Name : Mark Dalton
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I saw that show. He was nailing the tree (actually Rich's arm drop) all night long. I'm sure he won more than 1 round on a hole shot. 
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11-14-2008, 08:01 PM
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#6
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retired mech engineer
Join Date: Sep 2007
Location: florida
Posts: 159
Name :
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Quote:
Originally Posted by Lou G
This past weekend I watched "Pinks All Out" from Atlanta.
The winner was a 1998 Vette. The owner said that he had a boar out 427 engine.
Does that mean that he increased the cylinder displacement to 427 cubic inches? If that is the case, I assume he had to install bigger pistons and rings, right? Would he have to change the cam and lifters also?
I also wonder what the increase in horse power was.
Just curious. |
ok basics
if its a C5 or C6 chances are excellent the engines a LS1-LS7 family
usually built from one of these on a stroker build
http://www.worldcastings.com/prods_p...ks/warhawk.htm
example
http://airflowresearch.com/articles/article108/A-P1.htm
http://airflowresearch.com/articles/article109/A-P1.htm
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11-14-2008, 11:34 PM
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#7
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Member
Join Date: Oct 2006
Location: New Smyrna Beach & West Milford, N.J.
Posts: 804
Name :
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Quote:
Originally Posted by grumpyvette
ok basics
if its a C5 or C6 chances are excellent the engines a LS1-LS7 family
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Wow, great articles. I learned quite a bit by reading both. It answered all my questions plus a lot more.
One thing I didn't understand was why peak torque (600) was reached at 4,600 RPM with HP at 526 and then decreased to 534 as RPM and HP increased to 6,400 and 650 respectively.
Thanks Grumpy.
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11-15-2008, 01:11 AM
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#8
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Internet Sanitation Engineer
Join Date: Mar 2006
Location: Crawfordville, FL
Posts: 15,127
Name : Rich Zuchowski
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Sounds like a REAL nice engine to be connected to my right foot. But I do wish such articles would mention the COST of such an animal. When my LS6 gets old and tired, I would really like to drop a 427 in to my C5Z. Sure do wish I knew how much that would cost so I could start saving up my pennies....
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11-15-2008, 09:45 AM
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#9
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Senior Member
Join Date: May 2006
Location: port of indecision
Posts: 5,604
Name :
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IIRC (it's been a while) most of these "packages" are in the 10-20k range.
What do you think Grumpy?
__________________
Remember:
Artificial Intelligence is no replacement for Natural Stupidity!
Be Polite, Be Professional...and have a plan to kill everyone you meet.
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11-15-2008, 01:21 PM
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#10
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retired mech engineer
Join Date: Sep 2007
Location: florida
Posts: 159
Name :
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Quote:
Originally Posted by Lou G
Wow, great articles. I learned quite a bit by reading both. It answered all my questions plus a lot more.
One thing I didn't understand was why peak torque (600) was reached at 4,600 RPM with HP at 526 and then decreased to 534 as RPM and HP increased to 6,400 and 650 respectively.
Thanks Grumpy. |
ok basics
horsepower (in our context)is a term used to describe the RATE at which rotational torque can be applied, as force from the engine to the drive train
http://forum.grumpysperformance.com/...php?f=50&t=558
as the RPMS increase the amount of TIME AVAILABLE PER INTAKE STROKE DECREASES, up to some point, thats determined by the ports,runners and cam lift and the engines displacement,as the rpms increase the number of power strokes per second increase and power goes up,but at some point the time necessary to fully fill the cylinders starts to limit the flow into the cylinders and the volumetric efficiency falls off in relation to the rpm increase, this decrease in the amount of fuel air mix burning per power stroke tends to lower the torque produced PER POWER STROKE, but as the rpms increase its a trade off , of more power strokes, but less effective ones, so the power tends to increase for a bit higher in the rpm range than the torque peak, (WHICH TENDS TO FOLLOW THE VOLUMETRIC EFFIENCY CURVE VERY CLOSELY)
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