Ls1 intake vs ls6
Drifting
Joined: Sep 2017
Posts: 1,966
Likes: 696
From: Avon Lake OH
Well, maybe and maybe not...
https://www.motortrend.com/how-to/pi...6-intake-swap/
That was with an automatic '99 F-body with 99k miles, using a LS6 intake that had been modified to accept the factory F-body EGR system. It picked up 8 rwHP and 2 ft-lbs of torque dead stock without a tune vs the stock LS1 intake. Yes they made more power with a dyno tune, but they also didn't dyno tune the engine with stock LS1 intake, so its hard to make a complete apples to apples comparison. But even on a dead stock F-body LS1 the intake manifold swap yielded more measurable power. As always, YMMV.
https://www.motortrend.com/how-to/pi...6-intake-swap/
That was with an automatic '99 F-body with 99k miles, using a LS6 intake that had been modified to accept the factory F-body EGR system. It picked up 8 rwHP and 2 ft-lbs of torque dead stock without a tune vs the stock LS1 intake. Yes they made more power with a dyno tune, but they also didn't dyno tune the engine with stock LS1 intake, so its hard to make a complete apples to apples comparison. But even on a dead stock F-body LS1 the intake manifold swap yielded more measurable power. As always, YMMV.
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,145
From: Sleepy Hollow- NJ
http://www.c5registry.com/zo6/Introduction/overview.htm
"Corvette engineers opened up the intake system, enabling the LS1 engine to pull in more air and the camshaft profile to be moderated in lift and overlap"
"Engineering development of the Z06 package resulted in several improvements for coupe and convertible models as well. LS1 engines get the same new intake and exhaust manifolds as the LS6"
"The (LS6) engine also has a more aggressive camshaft profile to take full advantage of the additional air that Corvette's new intake manifold provides. New highcompression cylinder heads (10.5:1 vs. 10.1:1 on the LS1) have improved porting to get this larger volume of air smoothly into the combustion chambers. The new heads are equipped with stronger larger volume of air smoothly into the combustion chambers".
The 2001 LS6 based Z06 only saw a 35hp/10tq bump over the 2001 LS1. This is with better heads, bigger cam, and same intake. The 243 heads alone make up most of this improvement. The cam also makes up for most of the bump.
The intake did NOT add the 5hp/25tq power increase on the stock LS1 some wish to believe.
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,145
From: Sleepy Hollow- NJ
Well, maybe and maybe not...
https://www.motortrend.com/how-to/pi...6-intake-swap/
That was with an automatic '99 F-body with 99k miles, using a LS6 intake that had been modified to accept the factory F-body EGR system. It picked up 8 rwHP and 2 ft-lbs of torque dead stock without a tune vs the stock LS1 intake. Yes they made more power with a dyno tune, but they also didn't dyno tune the engine with stock LS1 intake, so its hard to make a complete apples to apples comparison. But even on a dead stock F-body LS1 the intake manifold swap yielded more measurable power. As always, YMMV.
https://www.motortrend.com/how-to/pi...6-intake-swap/
That was with an automatic '99 F-body with 99k miles, using a LS6 intake that had been modified to accept the factory F-body EGR system. It picked up 8 rwHP and 2 ft-lbs of torque dead stock without a tune vs the stock LS1 intake. Yes they made more power with a dyno tune, but they also didn't dyno tune the engine with stock LS1 intake, so its hard to make a complete apples to apples comparison. But even on a dead stock F-body LS1 the intake manifold swap yielded more measurable power. As always, YMMV.
Plus as you've stated and I covered earlier, there would have been improvement gains based on just tuning an LS1 without the LS6 intake. So the gains from the LS6 intake alone on a stock motor are even less.
