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Old 12-27-2012, 11:54 AM   #1 (permalink)
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Tune a stock zo6

What do you guys think about getting a tune on my stock 2001 zo6? It has 39,000 miles and is running great. I was just wondering if there would be any HP/Tourqe gains. I have another 2 years on an gm extended warranty, so I'm not going to do any mods till it is up. I have installed one the duel cone intakes that's it. Any thoughts would be appericiated!!!
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Old 12-27-2012, 12:52 PM   #2 (permalink)
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Re: Tune a stock zo6

IMHO! The gains aren't worth the money to have it tuned.
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Old 12-27-2012, 01:25 PM   #3 (permalink)
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Re: Tune a stock zo6

Quote:
Originally Posted by montana View Post
What do you guys think about getting a tune on my stock 2001 zo6? It has 39,000 miles and is running great. I was just wondering if there would be any HP/Tourqe gains. I have another 2 years on an gm extended warranty, so I'm not going to do any mods till it is up. I have installed one the duel cone intakes that's it. Any thoughts would be appericiated!!!
For Warranty purposes, a tune IS a mod!!!
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Old 12-27-2012, 03:49 PM   #4 (permalink)
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Re: Tune a stock zo6

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Originally Posted by PerforminNorman View Post
IMHO! The gains aren't worth the money to have it tuned.
If a tune is all you're doing, I agree with Norman.

Mike
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Old 12-27-2012, 05:41 PM   #5 (permalink)
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Re: Tune a stock zo6

Unless people have had their stock Corvette tuned they really are missing what the real results are.

Just as example by tuning total stock Corvette.

GM goes by a 80% design rule so tune is adjusted to 80% of the ability of the engine design. That alone leaves performance output limited.

PCM can pull as much as 15 degrees of timing, even if it is false knock
Same as to misfires, lots of timing lost even with false misfire

WOT timing can be as low as only 12 degrees and get trapped into thinking fuel is not best and force into using the low octane timing table

Fuel injector size is a bit small and tuned more to be lean, worse with Ethanol in gas today

Torque management kills off launch to mid engine loads and more during shifts and then engine has to recover from it.

Radiator fans are set to only work from 0 to 35 MPH and not even come on till over 210 water degrees.

To over protect the CATs since GM by law has to warranty them for 8 years or 100,000 miles floods exhaust with fuel to cool CATs down costing wrong AFR at WOT

1 to 4th gear (CAGS) can be turned off, rev limiter can be raised a bit, can adjust for different tire/wheel sizes

C5s were not designed for Ethanol in gas, the PCM can measure for its percentage to gas and tune can make up for that.

Simple change of type of aircleaner and if CAI is installed a tune can better calibration, same for simple change of coolant thermostat opening point.

Plus more but in the least a good tune for a C5 is about 40 plus HP (depending on where in elevation car lives), much better torque low to mid range, less apt to trigger on false knock or misfires and prevent abuse mode kicking in

It is funny people think spending $300-500 for a aircleaner or underdrive pulley makes performance gains but a good tune will not.

Or they spend $1600-2000 for headers for stock engine which require a tune and then claim the gains are from headers when it was the tune that was the true gains

C6 LS3, LS7s gain a good 50 plus HP and LS9 60 plus just from a good custom tune.

Problem is with cheap $500 tuning tools most car owners or some wrencher proclaims they are professional tuners with no experience and Corvette owners suffer from real crappy tuning methods so use a tuner who's main business is tuning and has been doing it for many years on many, many cars.

Difference I know first hand is bad tuner blew my LS6 up, and a good tuner saved me from losing a 2nd engine.
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Old 12-30-2012, 07:07 PM   #6 (permalink)
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Re: Tune a stock zo6

Thanks for the info Mike!!
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Old 01-13-2013, 01:38 PM   #7 (permalink)
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Re: Tune a stock zo6

I would agree with racingvette. Sure seems that everyone is very happy with the $149.00 mail in tune from ECS. They seem to cover all the things racingvette has brouht up in his post. You may want to check them out.
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Old 01-15-2013, 02:23 PM   #8 (permalink)
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Re: Tune a stock zo6

Well here's my experience, I had about 358 at the wheels with stock tune and my best time at the drag strip was 12.7, after the tune, I had 371 at the wheels and it was definitely faster but harder to control, my best time after the tune was the same 12.7. So the stock tune is pretty good.
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Old 01-16-2013, 03:44 PM   #9 (permalink)
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Re: Tune a stock zo6

I know your times were the same after a tune, but it now seems you need to get used to the new HP and TQ you got from the tune. And please don't take that the wrong way. Not here to offend anyone.
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