C6 Chassis Dyno Numbers Inside (Actual)>>>>
Instructor
Joined: Jan 2004
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From: Detroit area mi
Stormy652 said:
The camshaft is a new design, and the older LS1 cam will not fit, but I am sure the aftermarket will have a multitude of cams available in no time.
I agree that the engine is begging for a longer duration cam. After I drove the C6 for a day, I came to the conclusion that a cam change will take place as soon as I can get my car and camshaft in my hands.
The drivability due to the broad torque curve of the new C6 is actually better than it needs to be. That indicates to me that a slightly "bigger" cam will still provide very acceptable drivability while delivering more horsepower. GM always utilizes cams that are very conservative on valve lift for durability reasons on stock engines. Although they claim a higher lift cam in the new LS2, the better breathing on both intake and exhaust sides will benefit greatly by increasing the lift further.
I like the numbers either way, love the torque curve, and salivate at the possibilities of merely putting in a '02 Z06 cam.
I agree that the engine is begging for a longer duration cam. After I drove the C6 for a day, I came to the conclusion that a cam change will take place as soon as I can get my car and camshaft in my hands.
The drivability due to the broad torque curve of the new C6 is actually better than it needs to be. That indicates to me that a slightly "bigger" cam will still provide very acceptable drivability while delivering more horsepower. GM always utilizes cams that are very conservative on valve lift for durability reasons on stock engines. Although they claim a higher lift cam in the new LS2, the better breathing on both intake and exhaust sides will benefit greatly by increasing the lift further.
Last edited by 73VetteMan; Aug 5, 2004 at 11:52 AM.
Race Director
Joined: Nov 2001
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Originally Posted by stormy652
Well the Horsepower numbers are right where GM claimed, so it looks like I was wrong by saying that it'd be underrated from the factory to placate the C5 owners...however perhaps there is a slight tweak that can/will be done in the next model year to bump it up a few horses? Plus this is the only one that has been independently dynoed that I know of.
Assuming 12% drivetrain loss, it should be around 352rwhp. Many feel the loss for the manual C5 was closer to 15%, which should put it around 340rwhp. Either way, these dyno results are very close to what GM is advertising. It can't see them underrating the C6 anyway, since hp #'s are so important in marketing for performance autos. The only reason they underrated the F-bodys was to protect the marketing image for the Vette. With the C6, there is no higher performance car in GMs lineup to protect.
Le Mans Master
Joined: Mar 2002
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From: Corpus Christi TX
I know these results are extremely preliminary, but honestly, those peak numbers are a bit disappointing. I wonder out loud if the camshaft is really an 01 spec LS6 cam. Looking at the rest of the components and a 01 LS6 cam, I would have guessed maybe 360/360 peak right out of the box. Then maybe break in to 365ish. Has GM "officially" released the LS2 cam specs?
I agree, if I was getting a C6, I'd be salivating at a cam swap.
I agree, if I was getting a C6, I'd be salivating at a cam swap.
Supporting Vendor
Joined: Mar 2002
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From: Bristol, Tennessee
St. Jude Donor '09
That works out to 405 BHP, which is right on the money. I have always said that the Z06 was underated by GM. If you compare the two dynos, you'll see the peak HP somewhere inbetween the 2001 Z06 and the 2002 Z06.
It appears, as BluByU says, the cam is the 2001 Z06 cam, leaving another 10 or so HP on the table for next years upgrade.
The intake system will be pretty hard to beat on the dyno, with maybe 10 RWHP left over for the aftermarket.
I believe the C6 has gone back to the laminar screened MAF sensor used on the 2001 Z06 for better metering and less codes from turbulent airflow at low rpm. Good news for us.
Jim Hall
It appears, as BluByU says, the cam is the 2001 Z06 cam, leaving another 10 or so HP on the table for next years upgrade.
The intake system will be pretty hard to beat on the dyno, with maybe 10 RWHP left over for the aftermarket.
I believe the C6 has gone back to the laminar screened MAF sensor used on the 2001 Z06 for better metering and less codes from turbulent airflow at low rpm. Good news for us.
Jim Hall
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Originally Posted by Jim Hall
I believe the C6 has gone back to the laminar screened MAF sensor used on the 2001 Z06 for better metering and less codes from turbulent airflow at low rpm. Good news for us.
Jim Hall
Jim Hall
My understanding is that the LS2 cam uses the '01 LS6 lobes and lobe phasing, but the part number is different due to some other features of the camshaft (not directly bearing on valve timing) that are different than the '01 LS6 camshaft. LS2 uses the same valve spring, but it has a new part number, and I believe the LS2 spring has become the service spring for '01 LS6.
The '01 LS6 lobes are as aggressive as possible using solid valves. The '02-'04 LS6 lobes have more aggressive acceleration profiles, but require the lighter, hollow valves.
Duke
