question, 5.7 liter??
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 179
From: S.W. Ohio. . . . . . NRA Life Member
Re: question, 5.7 liter?? (The DBK)
am boring out my heads, does that mean that my car is no longer a 5.7 liter?
but, if you increase the size of the dome in the clyinder head, you decrease your compression ratio.
but, if you increase the size of the dome in the clyinder head, you decrease your compression ratio.
Administrator
Joined: Mar 2001
Posts: 367,284
Likes: 24,571
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Re: question, 5.7 liter?? (XCELER8)
No, you have to increase the bore and stroke of the pistons to increase your displacement I believe.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Instructor
Joined: Nov 2001
Posts: 116
Likes: 0
From: Houston Texas
Re: question, 5.7 liter?? (robsvette)
Changing your head volumes will obviously change your compression ratio but displacement is measure on swept volume, as someone up there said, bore X stroke = displacement. Put little itty bitty heads (combustion chamber volumes) on and you will have a high compression 5.7L. Put mammoth huge heads on and you will have a low compression, low performance, but able to run low octane fuel, 5.7L.
Instructor
Joined: Nov 1999
Posts: 131
Likes: 0
From: Kailua Kona Hi
Re: question, 5.7 liter?? (XCELER8)
Another stupid question...
I thought the displacement was lowered alittle with the LS1 to 5.6 and some change? Kinda like a 5.0 mustang is really a 4.9 and some change :p:
Then again I could be way off my rocker :yesnod:
I thought the displacement was lowered alittle with the LS1 to 5.6 and some change? Kinda like a 5.0 mustang is really a 4.9 and some change :p:
Then again I could be way off my rocker :yesnod:
Instructor
Joined: May 2002
Posts: 206
Likes: 0
From: Elmhurst IL
Re: question, 5.7 liter?? (EJB98GT)
Quick math:
LS1 Bore=3.90", Stroke=3.62". Since we're taking metrics here, let's covert units early, that is, 25.4mm per inch (exactly, if I recall). So, Bore=99.06mm and Stroke=91.948mm.
By definition, volume of a cylinder (the effective displacemment caused by the motion of the piston) equals the area of the bore circle (Pi times radius squared) times the length of the stroke.
Therefore, the displacement of one cylinder equals
3.14159X(99.06/2)squared X 91.948 which equals approximately 708644 cubic millimeters. Multiplied by eight equals 5,669,156 cubic millimeters, the displacemenmt of our LS1/6.
There are ten millimetrs per centimeter. Ten millimeters cubed (volume conversion) equals one thousand. Therefore, division reveals that the displcement is actaully 5,669 cubic centimeters. Again, by definition, there are 1000 cubic centimeters per liter so again division shows that the displacemnet of the LS1 is 5.669 liters. Rounding to the nearest decimal shows that it is a 5.7, but as you surmised, not quite.
Sorry, I'm just a frustrated BSME trying to exercise long lost math skills. Too much time on my hands on another sleepless night.
LS1 Bore=3.90", Stroke=3.62". Since we're taking metrics here, let's covert units early, that is, 25.4mm per inch (exactly, if I recall). So, Bore=99.06mm and Stroke=91.948mm.
By definition, volume of a cylinder (the effective displacemment caused by the motion of the piston) equals the area of the bore circle (Pi times radius squared) times the length of the stroke.
Therefore, the displacement of one cylinder equals
3.14159X(99.06/2)squared X 91.948 which equals approximately 708644 cubic millimeters. Multiplied by eight equals 5,669,156 cubic millimeters, the displacemenmt of our LS1/6.
There are ten millimetrs per centimeter. Ten millimeters cubed (volume conversion) equals one thousand. Therefore, division reveals that the displcement is actaully 5,669 cubic centimeters. Again, by definition, there are 1000 cubic centimeters per liter so again division shows that the displacemnet of the LS1 is 5.669 liters. Rounding to the nearest decimal shows that it is a 5.7, but as you surmised, not quite.
Sorry, I'm just a frustrated BSME trying to exercise long lost math skills. Too much time on my hands on another sleepless night.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 8,238
Likes: 0
From: Lakeland, Center of Florida Fl
Re: question, 5.7 liter?? (MagRed2002)
:crazy: :crazy: :crazy: :crazy: Oh my that is way to much math for this college grad. I thought I left Cal a long time ago. Please let this thread die...LOL I hate seeing it come up to the top reminding me about my dumb question...LOL Thanks for the technical info though. Now I can sound semi smart if someone asks.
Jon
Jon
