Red Line - LS3 vs LS7
09-21-2017, 10:25 AM
#1
Racer
Thread Starter
Red Line - LS3 vs LS7
Why the lower red line (6500) for the LS3 vs. the LS7 (7000). Basically the same motor I believe. Stronger internals in the LS7 or ?? Just wondering
09-21-2017, 10:36 AM
#2
Instructor
I would venture to say its the power band the cam pulls to. No sense in a higher red line then the cam is making power. When you reach it you shift gears.
Last edited by Usmc041127; 09-21-2017 at 10:36 AM.
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09-21-2017, 11:57 AM
#3
All of that in addition to the cam profile which is drastically different contribute the the higher rpm
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09-21-2017, 04:20 PM
#4
Melting Slicks
Lighter valve train parts will safely increase the red line, titanium intake and sodium cooled (hollowed) exhaust valves.
Last edited by extrapilot; 09-21-2017 at 04:23 PM.
09-21-2017, 07:00 PM
#7
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09-21-2017, 07:08 PM
#8
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Here's reading that will explain how the 427 motor was developed. Lots of racing technology in that motor.
http://www.corvetteactioncenter.com/...ine/index.html
If the link is not allowed , please delete.
http://www.corvetteactioncenter.com/...ine/index.html
If the link is not allowed , please delete.
09-22-2017, 03:40 PM
#9
Safety Car
Most do it in conjunction with a cam install. Better springs, better harmonic balancer, and often a ported oil pump along with the cam pushing the power curve higher into the rpm range.
09-23-2017, 12:44 PM
#10
Tech Contributor
I'm regularly on track with my GS. At 7000rpm a stock LS3 would just be making noise.
To the OP....LS3 and LS7 are faaaaaar from being the same engine.
09-23-2017, 04:05 PM
#11
09-23-2017, 11:15 PM
#12
Burning Brakes
Here's reading that will explain how the 427 motor was developed. Lots of racing technology in that motor.
http://www.corvetteactioncenter.com/...ine/index.html
If the link is not allowed , please delete.
http://www.corvetteactioncenter.com/...ine/index.html
If the link is not allowed , please delete.
09-24-2017, 02:28 AM
#13
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Maybe you don't understand the concept of keeping the engine in the powerband. You don't shift when you reach maximum power, but when the average power on the high side of the curve is equal to the average power on the low side.
09-24-2017, 12:15 PM
#14
Drifting
