[Z06] Factory freak? Numbers inside...
Thread Starter
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
Factory freak? Numbers inside...
'03 Z06 with 33K miles
Only mods are Airaid Filter, GHL Bullets Catback and RPM motors Dyno Tune.
395.7/385.9 SAE
I recently added the Airaid filter and after some miles, my car threw lean codes on both banks. All clamps were tight, so I disconnected the battery. Drove another 100 miles and no CEL, but LTFT's were still way off at 20% @ WOT. Decided to get a dyno tune and put out these freakish numbers. Tuner said it's very rare he sees these high of numbers with my mods. They're in range with the addition of LT's.
Although Airaid claims no tune needed with this filter, I wouldn't run it without a tune. Way too lean.
Only mods are Airaid Filter, GHL Bullets Catback and RPM motors Dyno Tune.
395.7/385.9 SAE
I recently added the Airaid filter and after some miles, my car threw lean codes on both banks. All clamps were tight, so I disconnected the battery. Drove another 100 miles and no CEL, but LTFT's were still way off at 20% @ WOT. Decided to get a dyno tune and put out these freakish numbers. Tuner said it's very rare he sees these high of numbers with my mods. They're in range with the addition of LT's.
Although Airaid claims no tune needed with this filter, I wouldn't run it without a tune. Way too lean.
Last edited by 03 Z-oh-6; Dec 19, 2015 at 07:37 PM.
Le Mans Master
Joined: Jul 2000
Posts: 7,639
Likes: 326
From: Greenville SC
I would guess something is off with the dyno, modern cars don't have much variance from the factory. Those numbers are around what other get with LTs and a small cam. The HP is high, but the TQ even more so IMO. As long as it is no longer lean, and runs well, that is the main thing.
Thread Starter
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
I would guess something is off with the dyno, modern cars don't have much variance from the factory. Those numbers are around what other get with LTs and a small cam. The HP is high, but the TQ even more so IMO. As long as it is no longer lean, and runs well, that is the main thing.
Last edited by 03 Z-oh-6; Dec 19, 2015 at 08:43 PM.
Melting Slicks
Joined: Jan 2014
Posts: 3,153
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From: Rio Rancho, New Mexico
C6 of Year Finalist (appearance mods) 2019
Racer
Joined: Feb 2014
Posts: 326
Likes: 19
From: Decatur AL
As long as the car runs how it should then you should be fine. The numbers are definitely high for the "norm".
There is a correction factor that can be added to the dyno to increase numbers. It sounds like to me that the correction is set to high.
Cammed guys with stock 243's and stock LS6 intakes only make ~425 give or take a few HP based on the cam they chose. I have a rather large cam with a .621 lift with mid 230 duration. I only made 439/417 on a dynojet. With LT's and a vararam, so something is definitely off with the numbers.
There is a correction factor that can be added to the dyno to increase numbers. It sounds like to me that the correction is set to high.
Cammed guys with stock 243's and stock LS6 intakes only make ~425 give or take a few HP based on the cam they chose. I have a rather large cam with a .621 lift with mid 230 duration. I only made 439/417 on a dynojet. With LT's and a vararam, so something is definitely off with the numbers.
Thread Starter
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
FWIW, the baseline run before the tune, my car hit 390/375 SAE. He said the computer had been altered before(bought the car used), but just the fan settings and speed limiter were changed; everything else looked stock. So, there was not a ton of power picked up from the tune, he just fixed the lean condition and a few other things.
Race Director
Joined: Aug 2004
Posts: 14,639
Likes: 39
From: Winston-Salem North Carolina
St. Jude Donor '08-'09
I hit 430 rwhp/390 rwtq with cam, ARH lt's and atune with a 346 and stock ls6 intake. I'd be interested in the other shops readings
Last edited by GeorgeZNJ; Dec 20, 2015 at 10:01 PM.
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Melting Slicks
Joined: Jan 2014
Posts: 3,153
Likes: 859
From: Rio Rancho, New Mexico
C6 of Year Finalist (appearance mods) 2019
As long as the car runs how it should then you should be fine. The numbers are definitely high for the "norm".
There is a correction factor that can be added to the dyno to increase numbers. It sounds like to me that the correction is set to high.
Cammed guys with stock 243's and stock LS6 intakes only make ~425 give or take a few HP based on the cam they chose. I have a rather large cam with a .621 lift with mid 230 duration. I only made 439/417 on a dynojet. With LT's and a vararam, so something is definitely off with the numbers.
There is a correction factor that can be added to the dyno to increase numbers. It sounds like to me that the correction is set to high.
Cammed guys with stock 243's and stock LS6 intakes only make ~425 give or take a few HP based on the cam they chose. I have a rather large cam with a .621 lift with mid 230 duration. I only made 439/417 on a dynojet. With LT's and a vararam, so something is definitely off with the numbers.
Very tempting.
Thread Starter
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
I'm definitely going to take it to another dyno. However, I'm adding different wheels/tires which should add about 7 pounds per side in the rear. Not sure how much difference that will make with the numbers.
Drifting
Joined: Oct 2011
Posts: 1,980
Likes: 10
From: Crook County
As long as you have 1/4 mile times and traps to support those numbers for the legitimacy and accuracy of those power numbers you are gold and have something special. But if not, Numbers are just numbers and the realization of it is all dynos read different and i have seen some VERY happy dynos... I have personally seen a friends car dyno 415/395 on 1 dyno at a open house and dyno 396/379 on another shops. Both Dynojets...
Last edited by Breze84; Dec 23, 2015 at 09:17 AM.
Melting Slicks
Joined: Jan 2014
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From: Rio Rancho, New Mexico
C6 of Year Finalist (appearance mods) 2019
Burning Brakes
Joined: Feb 2005
Posts: 1,201
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From: Honolulu, HI
Go try another dyno and see if you get similar results. I've seen similar numbers before on here for stock C5 Z06's from that shop's dyno actually. It could be that that type of dyno reads higher than mustang and even dynoJet.
Still they could be that aggressive of a tune...they did/do a lot tune for the local LSx T1-spec race cars so hard to say...
I've got some nice dyno plot's from RPM too.
Still they could be that aggressive of a tune...they did/do a lot tune for the local LSx T1-spec race cars so hard to say...
I've got some nice dyno plot's from RPM too.
Last edited by dagon138; Dec 22, 2015 at 12:33 AM.
Le Mans Master
Joined: Nov 2003
Posts: 8,308
Likes: 157
From: NJ
For a drag strip comparo:
With 396hp/ 35Xtq years ago we trapped 124+mph in good air with 3.90 gears and a relatively heavy drag pack with no weight removal.
With 396hp/ 35Xtq years ago we trapped 124+mph in good air with 3.90 gears and a relatively heavy drag pack with no weight removal.
Last edited by robz; Dec 22, 2015 at 08:12 AM.
Thread Starter
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
Go try another dyno and see if you get similar results. I've seen similar numbers before on here for stock C5 Z06's from that shop's dyno actually. It could be that that type of dyno reads higher than mustang and even dynoJet.
Still they could be that aggressive of a tune...they did/do a lot tune for the local LSx T1-spec race cars so hard to say...
I've got some nice dyno plot's from RPM too.
Still they could be that aggressive of a tune...they did/do a lot tune for the local LSx T1-spec race cars so hard to say...
I've got some nice dyno plot's from RPM too.
The guys who tuned my car really know what they're doing, however.
Last edited by 03 Z-oh-6; Dec 23, 2015 at 07:48 AM.
Instructor
Joined: Mar 2014
Posts: 106
Likes: 0
Although I do admit your numbers are pretty high for no longtubes, anyone making sub 400 with an aftermarket cam needs to go back to the drawing board.