Base Line Dyno HP?

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Mar 15, 2005 | 02:27 PM

#21

JFTaylor

Thread Starter

Race Director

Joined: Oct 2004

Posts: 10,516

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From: Virginia Bch VA

Cruise-In VI Veteran

Cruise-In VII Veteran

St. Jude Donor '06

Non-Synth

Quote:

Originally Posted by TexasTechZ06

I did break it in differently...I don't know if that was the key. I drove it home from museum delivery (very gently...keeping at less than 3,000 RPM) and changed to regular non synthetic (800 miles).I continued to drive it at less than 3000 RPM, adding 1,000 RPM at every additional 500 miles or so. At 2500 Miles I went ahead and started romping on it. I then changed the oil at 3,500 miles back to mobil one. The main reason why I did that was becuase my Z06 burned oil and I did not want that to happen! That same day I dynoed a bunch of other 6sp z51 cars all dyned and they all pulled around 340-346...I guess I have a good car

Think your change to Non-synth for a while was the trick. A little more wear but a good solid break-in. Have heard motor heads say for years that putting in synth early will lengthen the break-in. Looks like you arrived at the proper way to do it. You have proof in your Dyno #s. Thanks man. Many happy miles

Mar 15, 2005 | 05:41 PM

#22

holeshotzo601

Heel & Toe

Joined: Feb 2005

Posts: 20

Likes: 0

Break in my a--

Break in means beat the shi- out of it. I have had over 20 corvettes and break them all in the same way beat the shi- out of it. If it breaks it goes back to GM.

Mar 17, 2005 | 09:48 AM

#23

TexasTechZ06

Racer

Joined: Mar 2002

Posts: 437

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From: Westlake Texas

Based on your method of breaking them in...how do they dyno? Do they ever burn oil?

Mar 17, 2005 | 11:46 PM

#24

jimman

Le Mans Master

Joined: Nov 1999

Posts: 7,695

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From: Imperial Beach CA

Mar 19, 2005 | 10:32 AM

#25

03LingenfelterC5

Instructor

Joined: Apr 2002

Posts: 221

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From: Michigan

Can anyone explain the difference between "corrected" and standard results?

Mar 20, 2005 | 01:35 AM

#26

catpat8000

Pro

Joined: Oct 2004

Posts: 546

Likes: 1

From: CA

Quote:

Originally Posted by 03LingenfelterC5

Can anyone explain the difference between "corrected" and standard results?

Not sure if this is what you're asking but... there are
two correction factors in common use to standardize
dyno results. One is known as STP or Standard Temp
and Pressure and this correction corrects to 60
degrees. The other common correction standard
corrects to 77 degrees and a slightly different air
pressure.

According to Hot Rod, STP correction produces results
about 5% higher. In a recent test, they had an LS2 on
an engine dyno and it produced 400hp and 422 hp
correcting to both standards, respectively. They assert
GM does not use STP correction to rate its engines
but that most dyno operators do use STP. That's
certainly one way to get better hp numbers - use a
different correction factor than the factory!

Pat

Mar 20, 2005 | 08:23 AM

#27

03LingenfelterC5

Instructor

Joined: Apr 2002

Posts: 221

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From: Michigan

Thanks Pat. I know for a fact uses the GM method. I think it is easy to get wrapped up into all the comparisons. I think the best measurement is SOTP unless you are a serious racer.

BK

Mar 20, 2005 | 08:40 AM

#28

jschindler

Team Owner

Joined: Jun 2001

Posts: 26,714

Likes: 344

From: Houston, TX

Comparing dyno results across the country is fairly meaningless. Different dynos have different results. I remember a show on TV a couple of years ago where they dyno'd a C5 at something like 280 rwhp and were real proud of the results. It was because the dyno they used had a very pessimistic factor built into it for calculating rwhp.

Also, the operator has to know how to set it up, and make sure the car is at proper operating temperature (both coolant and oil). I would not get hung up on the numbers. This is also why I only dyno mine on "dyno days" where they dyno several other Corvettes. That way I am getting a meaningful comparison of how mine does compared to other like cars.