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Corvette Cam From C5 Into My 1999 5.3 Vortec

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Old 10-28-2008, 10:39 AM
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The Vette has a larger displacement engine with a higher compression ratio. That's the primary reason for the power difference, not the cam, unfortunately.
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Old 10-29-2008, 09:47 AM
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Thae LS6 cam is about perfect, but too wide of an LSA.............
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Old 10-29-2008, 10:31 AM
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Originally Posted by thunder550
The Vette has a larger displacement engine with a higher compression ratio. That's the primary reason for the power difference, not the cam, unfortunately.
As well as a better air intake, exhaust, cylinder heads, intake manifold, and factory premium fuel programming.
Last edited by zippy; 10-29-2008 at 10:51 AM.
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Old 10-29-2008, 12:02 PM
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Originally Posted by RANDHOOG1
Thanks,, for the record no i didn't install a chip,, i purchased an aftermarket programmer. They have chips correct... I have found out after purchasing the Hypertech Programmer the gains i expected fell way short. Thus the reason to upgrade the camshaft. The 2002 C5 LS1 had 350 HP not a large increase but better than the 290hp my truck came with stock.
if all you were looking for was a little bit more power above the programmer sell it and try a custom tune... they're better and might get you to where you want the truck to be without the internal mods just yet.. over time it will always be to slow
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Old 10-29-2008, 03:48 PM
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Default 270 hp
1999 (LM7) 5.3 Vortec,, a whole whopping 270 freaking HP stock. no wonder i wanted to to give it some help. Thats the weakest of the 5.3 motors that they manufactured. Definitely getting a cam, heads , Tune . Found a buyer for the hyper programmer. Ls6 cam, 80mm throttle, headers, ls6 intake and oh yes it's going to get a custom tune. a friend of mine has a drive on dyno... once i have completed this makeover i will post the numbers i acheive.

Thanks for your advice..
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Old 10-29-2008, 03:54 PM
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good luck man!! keep us updated on the work!
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Old 10-29-2008, 04:04 PM
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Cool, good luck. Make sure to check your injector duty cycle when you get it that far.
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Old 10-29-2008, 04:57 PM
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The cam come out of a Camaro or Vette?

I highlighted them in Red...






Corvette LS1
97-98 12554710 199/207 .472/.479 117
98-99 12560964 199/207 .472/.479 117
2000 12560968 198/209 .500/.500 115.5
01-03 12561721 198/207 .467/.479 116

Corvette LS6
2001 12560950 204/211 .525/.525 116 385hp
02-04 12565308 204/218 .555/.551 117.5 405hp

Camaro/Firebird
98 12557812 198/209 .500/.500 119.5
99-00 12560965 198/209 .500/.500 119.5
01-02 12561721 196/207 .467/.479 116

Trucks and SUV with Vortec engine
LR4 and LM7
99 12560966 191/190 .457/.466 115.5
00-04 12560967 191/190 .457/.466 114
the 03-04 LM7 used the 12560967 camshaft
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Old 10-29-2008, 08:23 PM
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waste of money on the 80mm throttle body
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Old 10-30-2008, 12:32 PM
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Default Cam
The Cam is out of a Vette, I have 2 to choose from. I have an LS3 cam from a
2006 GTO.. or the Ls6 cam from 04 vette..

Which would make my truck rock?
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