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Low Dyno #s?

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Old Mar 17, 2010 | 07:18 PM
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Default Low Dyno #s?

Hey all,

Wondering if these #s are normal:

H/C/I 01 ZO6

Blackwing Intake
Kooks Long Tube Headers
Corsa Race Exhaust

Mild Cam (I don't have specs with me unfortunately).

I know this info is kind of vague, but the car recently put down an SAE-corrected 384 to the wheels.

Is that normal? The car is 385 stock to the crank, so a full H/C/I increasing WHP by approximately 45 seems to be on the low side (assuming .88 crank-to-whp conversion ratio). I would have thought approximately 400 to the wheels would be more likely.

I wish I had a picture of the dyno or more information on the specifics of the cam, but I just recently purchased the car and have the information at home.

What do you guys think?

-K
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Old Mar 17, 2010 | 07:34 PM
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Originally Posted by Damacon
Hey all,

Wondering if these #s are normal:

H/C/I 01 ZO6

Blackwing Intake
Kooks Long Tube Headers
Corsa Race Exhaust

Mild Cam (I don't have specs with me unfortunately).

I know this info is kind of vague, but the car recently put down an SAE-corrected 384 to the wheels.

Is that normal? The car is 385 stock to the crank, so a full H/C/I increasing WHP by approximately 45 seems to be on the low side (assuming .88 crank-to-whp conversion ratio). I would have thought approximately 400 to the wheels would be more likely.

I wish I had a picture of the dyno or more information on the specifics of the cam, but I just recently purchased the car and have the information at home.

What do you guys think?

-K
It seems extremely low especially because you have heads. I'm pushing 394/379 at the wheels with a cam and long tubes and thats considered low as well. H/C/I should be at the very least 450/400+ at the wheels. More like 460-480 WHP
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Old Mar 17, 2010 | 07:42 PM
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Default Hmm....

That's what I thought too. I'll take it to a tuner shop and ask them why the low dyno #s. I wonder if it's because of the type of dyno?

I think it was a Dynojet.

-K
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Old Mar 17, 2010 | 07:44 PM
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you mention HCI yet say something about a unknown cam and dont mention heads or FAST intake...so sounds like a dinky cam only 01Z...and your numbers may not be too far off what they should be...the guy above mentioned 460-480...which is correct when using PREMIUM HCI parts and a maximized combo...most HCI guys are lucky to see the sunny side of 440rwhp because they use budget parts or dont have all the pieces to the puzzle
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Old Mar 17, 2010 | 07:50 PM
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Originally Posted by USAFZ06
you mention HCI yet say something about a unknown cam and dont mention heads or FAST intake...so sounds like a dinky cam only 01Z...and your numbers may not be too far off what they should be...the guy above mentioned 460-480...which is correct when using PREMIUM HCI parts and a maximized combo...most HCI guys are lucky to see the sunny side of 440rwhp because they use budget parts or dont have all the pieces to the puzzle
I'll need to go home and grab the sheet with the specs on the kind of cam that was installed.

The intake is a Blackwing. I wasn't aware the FAST is a premium while Blackwing is a much lower quality.

And when you said "heads", I'm assuming that refers to "headers", and as I understand, the car has Kooks Long-Tube Headers already installed with a Corsa Race Exhaust system.

Do you think it's simply in need of a solid tune? I just bought the car last Wednesday and everything checked out (it blew super-clean for smog here in CA as well). I even have the receipt for the cam install.

-K
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Old Mar 17, 2010 | 08:02 PM
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are you sure it has aftermarket heads? look for the casting # at the front lower part of the head...report back

it has long tubes? and you passed cal smog? i thought the cali guys said they don't allow long tubes to pass smog there?
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Old Mar 17, 2010 | 08:48 PM
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now by HCI=HEADS CAM INTAKE(not LS6 intake manifold ie FAST or other aftermarket)
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Old Mar 17, 2010 | 08:48 PM
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Originally Posted by Damacon
I'll need to go home and grab the sheet with the specs on the kind of cam that was installed.

The intake is a Blackwing. I wasn't aware the FAST is a premium while Blackwing is a much lower quality.

And when you said "heads", I'm assuming that refers to "headers", and as I understand, the car has Kooks Long-Tube Headers already installed with a Corsa Race Exhaust system.

Do you think it's simply in need of a solid tune? I just bought the car last Wednesday and everything checked out (it blew super-clean for smog here in CA as well). I even have the receipt for the cam install.

-K
Just so we don't get too far into this without knowing, does it have a "lumpy" or a smooth idle? Not trying to make you feel , but I have to ask. If it isn't lumpy, you probably just have a stock cam.

What USAFZ06 said about the premium parts is correct. Should have threw that in. Even if it is a cam only car, you should be putting more to the wheels than what you are. Dynojets don't read low, mustang dynos do.

Hurry and report what you have
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Old Mar 17, 2010 | 08:49 PM
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the blackwing is just a simple bolt on CAI...when people reference intake they mean intake manifold
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Old Mar 17, 2010 | 09:37 PM
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should just be CAI...
if it has a fast on it then that is intake....

curious if it has stock casting heads or not....
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Old Mar 17, 2010 | 09:38 PM
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Default Info!

I have the information!:

Kooks 1 3/4" headers
Kooks X pipe w/ cats
Corsa Race Exhaust
224 Cam 114 LS4
Blackwing Intake

All of this was installed and tuned at Synergy Motorsports in Fremont, CA.

I don't have a way of scanning my dyno graph, but it was done on a dynopack dyno, and the pulls look like this:

384.6HP
372.6TQ

Ratio: 3.420
TCF: 1.00
Gain: -0.1

The graphs look pretty solid when compared with other dyno graphs I've seen.

The cam spec isn't very specific. Could it just be a stock cam that was REPLACED, or a very mild aftermarket cam? On the work invoice for the cam work, it just lists "Cam package"

cam-S $425
Pushrods-S $125
Springs-S $300.00

Do you think this could just be a regular maintenance item and I misunderstood?

Thanks for all the help so far guys

-K
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Old Mar 17, 2010 | 10:03 PM
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looks like a cam only set up then...(only internal mod)

cam/ headers/ cai

makes more sense than the cam/heads/intake you stated at 1st....

here is a vid of a vette with one...

http://www.youtube.com/watch?v=lBmmuOYOplM

it is a "smaller cam" that is what most people will prob tell you.... but are you happy with the power it puts down, and how it drives?

Last edited by tommie; Mar 17, 2010 at 10:06 PM.
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Old Mar 17, 2010 | 10:10 PM
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Your numbers are in the right ball park with those mods. A new tune might get you more but if it is running nice why do it.
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Old Mar 17, 2010 | 10:28 PM
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As long as the numbers look right, I'm not so concerned.

The car recently had it's major servicing done, so I'm happy with the way it turned out and the way it runs.

Coming from an E36 M putting about 200 to the wheels, 380 is nuts, so I'm going to take my time and learn to control and respect the power before I worry about more mods. Next mod will definitely be the driver mod with some track time and auto-X.

I just wanted to make sure that things added up.

Thanks for the help

-K
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Old Mar 17, 2010 | 10:38 PM
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Originally Posted by Damacon
As long as the numbers look right, I'm not so concerned.

The car recently had it's major servicing done, so I'm happy with the way it turned out and the way it runs.

Coming from an E36 M putting about 200 to the wheels, 380 is nuts, so I'm going to take my time and learn to control and respect the power before I worry about more mods. Next mod will definitely be the driver mod with some track time and auto-X.

I just wanted to make sure that things added up.

Thanks for the help

-K
enjoy
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Old Mar 23, 2010 | 05:44 PM
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Don't get caught up in numbers. Take it to the track and see what she does first.
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Old Mar 24, 2010 | 08:35 AM
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Originally Posted by USAFZ06
you mention HCI yet say something about a unknown cam and dont mention heads or FAST intake...so sounds like a dinky cam only 01Z...and your numbers may not be too far off what they should be...the guy above mentioned 460-480...which is correct when using PREMIUM HCI parts and a maximized combo...most HCI guys are lucky to see the sunny side of 440rwhp because they use budget parts or dont have all the pieces to the puzzle
Exactly. Mine with Cartek Heads, Custom Cam, Fast Intake, and all supporting "bolt-ons" made 465/424 to the wheels with a nice fat Tq curve.

Couple that with the 3:90's and M12 tranny I put in, the car is a blast to drive.
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To Low Dyno #s?

Old Mar 24, 2010 | 09:12 AM
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sounds like my build 390s w/m12 and 465rwhp...had to sell it last week thought
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Old Mar 24, 2010 | 09:41 AM
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Originally Posted by USAFZ06
sounds like my build 390s w/m12 and 465rwhp...had to sell it last week thought
Wow, sorry to hear that. I know that hurt. I had to sell the first Z06 I had due to divorce, and picked up this car a few years later.

Just remember that everything happens for a reason, and I 'm sure you will be back in something even better before too long.
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Old Mar 24, 2010 | 10:27 AM
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Originally Posted by Chicago1
Don't get caught up in numbers. Take it to the track and see what she does first.
Exactly. it seems some folks (not you, but some folks) in the vette community obsess over dyno numbers. While it's fine for tuning, the track is where you really find out how much power your car is making.
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