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From stock LS1 engine to Z06 engine.

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Old Jun 13, 2010 | 02:37 PM
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Default From stock LS1 engine to Z06 engine.

I have a 99 LS1, Anyone out there knowing if I just can drop in a 02 Z06 engine ( just the engine, no eletrical), and reuse the components and boxes ?
I have biger fuel pump and fuel injectors, also intercooler system is on the car. - After taking off a procharger.
Just want to gain some HP and maybe put on some headers too.
Anyone have some experiense? - What components fit together?
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Old Jun 13, 2010 | 02:44 PM
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Yes you can its the same engine, not sure why you would go to it, your not gaining anything? Is the 99 tired? The 02 had better heads than the 99 is about it.
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Old Jun 13, 2010 | 04:09 PM
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You will need a tune for sure since the ECM and old engine with the procharger was probably tuned for boost. Other than that, should be plug and play. Loose the intercooler for NA though. The LS6 will be noticeably stronger than the LS1...especially above 4k RPM.
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Old Jun 13, 2010 | 04:54 PM
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Originally Posted by 99blancoss
Yes you can its the same engine, not sure why you would go to it, your not gaining anything? Is the 99 tired? The 02 had better heads than the 99 is about it.


the z06 in those years was a joke.. performance gains were negligible. you're far better off doing some internal work to your ls1 than you are to spend the money on a ls6 and all the time to swap it out.
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Old Jun 13, 2010 | 05:11 PM
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Originally Posted by schpenxel


the z06 in those years was a joke.. performance gains were negligible. you're far better off doing some internal work to your ls1 than you are to spend the money on a ls6 and all the time to swap it out.
While I agree with the point of questioning the need for a swap, the whole "ZO6 in those years was a joke" statement is about as wrong as you can get. The stock LS6 motor is at least 50 HP stronger than a stock LS1.
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Old Jun 13, 2010 | 05:53 PM
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Originally Posted by zeevette
While I agree with the point of questioning the need for a swap, the whole "ZO6 in those years was a joke" statement is about as wrong as you can get. The stock LS6 motor is at least 50 HP stronger than a stock LS1.
01's are at 385hp so 35 more not much of a difference. The 02-04 Yes those are 50hp more then a ls1.
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Old Jun 13, 2010 | 06:22 PM
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dumb question but thought ls1 was 350 hp stock and the Z was 425, my 2000 book says 350 is that not true??
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Old Jun 13, 2010 | 06:25 PM
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Originally Posted by Chicago1
01's are at 385hp so 35 more not much of a difference. The 02-04 Yes those are 50hp more then a ls1.
35HP is a 10% pick-up. If you felt that way, why do headers when they only add 35HP or so. It's the combination of improvements that make the total package
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Old Jun 13, 2010 | 07:06 PM
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Originally Posted by warlock007
dumb question but thought ls1 was 350 hp stock and the Z was 425, my 2000 book says 350 is that not true??
Nope. LS1 was not rated at 350hp until 2001. The LS6 was never rated at 425...rather..it was rated at 385hp in 2001, and 405hp from 2002-2004.
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Old Jun 13, 2010 | 07:25 PM
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Originally Posted by lucky131969
Nope. LS1 was not rated at 350hp until 2001. The LS6 was never rated at 425...rather..it was rated at 385hp in 2001, and 405hp from 2002-2004.
Very true--2000 and older vettes were 345hp.
You can see why I couldn't stand 284 rwhp
and opted to go to 525 rwhp. I need power!!
And I am still adding rwhp!!!!!!!
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Old Jun 13, 2010 | 07:48 PM
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i stand corrected, 345 2000, 2001 350 not really sure what the difference is between the two as in, how would they increase it by 5 HP. computer tune?
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Old Jun 13, 2010 | 07:54 PM
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Originally Posted by warlock007
i stand corrected, 345 2000, 2001 350 not really sure what the difference is between the two as in, how would they increase it by 5 HP. computer tune?
There really is a lot of info on this subject........

http://www.c5registry.com/Production/pre2001.htm

http://www.corvetteactioncenter.com/.../2001over.html
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Old Jun 13, 2010 | 07:55 PM
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Originally Posted by warlock007
i stand corrected, 345 2000, 2001 350 not really sure what the difference is between the two as in, how would they increase it by 5 HP. computer tune?
LS6 manifold.
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Old Jun 13, 2010 | 08:02 PM
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Originally Posted by ajg1915
LS6 manifold.
or more clearly.....the 2001+ LS1 and LS6 both use the same intake manifold.
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Old Jun 13, 2010 | 08:12 PM
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yep.

anyways. my point was that for the money, the ls6 simply isn't a very efficient method of getting more hp per dollar spent. even if you do all the labor yourself, why swap out components that are almost the same. put in a more aggressive cam and some decent headers and you'll be ahead of an ls6 already
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Old Jun 13, 2010 | 08:13 PM
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great info, thanks for that. am i correct that the 2001 5 HP increase is from the manifold only? and for the rest its the cam, etc?

thanks Lucky for the info
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Old Jun 14, 2010 | 12:34 PM
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LS6 intake manifold and better heads... 241 castings IIRC where the 99 had 853 castings.
I would just swap heads and intake instead of the whole engine unless the 99 engine is tired or broken? Oil pump and maybe a timing set and while you have the heads off lifters
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Old Jun 14, 2010 | 10:23 PM
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my 99 with 243 and a almost identical cam to 2004 Z06 358 RWHP, no reason to change the whole thing.

2001 and up exhaust manifold and intake manifolds are better
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Old Jun 15, 2010 | 11:44 AM
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Thanks for good info,
jupp, now I know alot more,
but my ls1 had a procharger-kit installed, tested dyno 503RWHP.
It had it on for a vhile, and engine got around 100K on it,s back, and I found a low milage 2002 Z06 engine.
I guess the boxes and wiring is simular 99 ls1 to 02 ls6...
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Old Jun 15, 2010 | 01:37 PM
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Just for your reference.

I had a stock LS1 (w/ stock LS6 intake), headers, CAI and dynoed at 325 rwhp and 300 rwtq.

I added a new set of stock 243 heads and a mild cam (224/230 .585/.595 113). Rwhp is now 416 and rwtq is 392.

It made a huge difference.
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