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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 03-31-2010, 09:41 AM   #1
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My dyno results for a stock LS3...discuss

Okay, so I drove down the Straightline Performance to get a baseline dyno pull. I pulled the Roto-Fab CAI induction off the car for the pull. Once I got home, I put it back on along with the SLP LM II.

Are these numbers out of line? Seems that alot of people think there results are "off".

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Old 03-31-2010, 11:14 AM   #2
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Probably just differences in dyno. But that is a solid pull especially for a mustang dyno. The most common number for the new camaro is 36x to 37x. I have seen some 38x and 39x but those are usually dynapack or dynojet dynos. I havent seen a mustang dyno read out as high as yours for a stock car yet.


One possibility is that your car may have slightly adjusted its computer for when you had the rotofab on...and then when you took it off and went to the dyno it could have still been running different parameters and effected the numbers.

See if you can get another 6 speed car to pull on the same day as you and see what happens.

Also...doesnt your car have a couple thousand miles on it? A lot of motors are known to pick up about 10-15 hp after break in...this could be part of the equation also. A lot of dynos I have seen around here are on cars with less than 500 miles on them.
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Old 03-31-2010, 11:20 AM   #3
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I think the HP@50 number is a bit on the low side. I would have them use something like 13.5-13.75, which is a pretty good guess and this will change the numbers some.
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Old 03-31-2010, 11:22 AM   #4
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Your dyno graph reads out at 369 max horsepower.

Your text on the sheet reads 391 max horsepower.



There is a misprint somewhere. 369 sounds perfect for this dyno.
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Old 03-31-2010, 11:59 AM   #5
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Quote:
Originally Posted by ULTRAZLS1 View Post
Dont I know you from ls1tech?

Probably just differences in dyno. But that is a solid pull especially for a mustang dyno. The most common number for the new camaro is 36x to 37x. I have seen some 38x and 39x but those are usually dynapack or dynojet dynos. I havent seen a mustang dyno read out as high as yours for a stock car yet.


One possibility is that your car may have slightly adjusted its computer for when you had the rotofab on...and then when you took it off and went to the dyno it could have still been running different parameters and effected the numbers.

See if you can get another 6 speed car to pull on the same day as you and see what happens.

Also...doesnt your car have a couple thousand miles on it? A lot of motors are known to pick up about 10-15 hp after break in...this could be part of the equation also. A lot of dynos I have seen around here are on cars with less than 500 miles on them.
Yup, I'm on tech as well....All of your logic sounds reasonable to me. Car does have over 2K on it.

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Originally Posted by Meister@Torq View Post
I think the HP@50 number is a bit on the low side. I would have them use something like 13.5-13.75, which is a pretty good guess and this will change the numbers some.
I'll relay the message, thanks!

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Your dyno graph reads out at 369 max horsepower.

Your text on the sheet reads 391 max horsepower.



There is a misprint somewhere. 369 sounds perfect for this dyno.
Good catch...how the hell did I miss that?!?!
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Old 03-31-2010, 12:44 PM   #6
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I think the numbers on the lower sheet are the adjusted ones. I would say thats about what most ls3's put out stock.
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Old 03-31-2010, 08:07 PM   #7
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Here's mine on the mustang dyno .
Higher #s were with the airbox open , air filter only ( taped to housing )
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Old 04-01-2010, 02:57 PM   #8
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Okay, I have confirmed that the dyno was in fact accurate...several other cars went on after mine that day with nuts on readings.

With regards to the graph results off from the cover sheet...the cover sheet is usually always a little higher because it uses SAE standards for correction, where as the graph uses raw data.

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Old 04-01-2010, 11:31 PM   #9
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Sorry, but the bottom graph is the accurate numbers. No stock LS3 makes 390hp to the wheels. Yours is 369hp/359tq.

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Old 04-01-2010, 11:44 PM   #10
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Same that mine laid down stock.
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Old 04-02-2010, 02:06 AM   #11
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Here is slighltly more than stock DYNO results.... Lots of ppl say they are no good bc they are STD readings....
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Old 04-02-2010, 08:05 AM   #12
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Mustang dynos always produce lower #'s than a dynojet.

They are just #'s. A dyno is just a tuning tool... How does your car FEEL??
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Old 04-02-2010, 03:24 PM   #13
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There is our's stock. I like to tell people not to get too wrapped up in numbers, it only show's what the car makes that day. Most of the time its pretty accurate but a dyno is just a tool.
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Old 04-02-2010, 05:03 PM   #14
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Your #'s look right for the Mustang dyno.The power@50 is close and wouldn't change the output. By the graph I see KR which is typical on these cars.
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Old 04-02-2010, 05:04 PM   #15
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Quote:
Originally Posted by 4xchamp View Post
Here's mine on the mustang dyno .
Higher #s were with the airbox open , air filter only ( taped to housing )
Thats a Dyna pack. The torque readings are always higher than Mustang and dynojet dyno's so it's hard to compare.
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Old 04-02-2010, 05:05 PM   #16
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Originally Posted by RBC2010SSRS View Post
Here is slighltly more than stock DYNO results.... Lots of ppl say they are no good bc they are STD readings....
Yes, STD #'s are hard to compare.They will always be higher than SAE #'s. So,pretty much they look good but mean little.
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Old 04-02-2010, 07:10 PM   #17
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Quote:
Originally Posted by g-townmach View Post
Mustang dynos always produce lower #'s than a dynojet.

They are just #'s. A dyno is just a tuning tool... How does your car FEEL??
My Car FEELS like a monster and eats up gas like one too, I LOVE my car.
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Old 04-02-2010, 10:56 PM   #18
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Quote:
Originally Posted by g-townmach View Post
Mustang dynos always produce lower #'s than a dynojet.

They are just #'s. A dyno is just a tuning tool... How does your car FEEL??
Hey guys,

Thanks for all the feedback..The tuner typically sees Camaro LS3s lay down in the 370 - 380 range on his dyno. a 10 HP swing up or down isn't that big of a deal according to him. My car may be packing a little more punch than the average LS3, but nothing earth shattering.

How does the car feel? I'll be honest, I had my 99 Z28 ( automatic with a 3200 stall ) on this exact samw dyno, and it laid down 380/380. My 2010 feels almost as stout, it's a beast!!

And yes, one of you mentioned that the dyno's most important function is as a tuning tool. HP results can vary....
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Old 04-02-2010, 10:57 PM   #19
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Quote:
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Your #'s look right for the Mustang dyno.The power@50 is close and wouldn't change the output. By the graph I see KR which is typical on these cars.
Yup, KR was there....which shocked me. The OEM tune must be fairly aggressive already!
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Old 05-28-2010, 12:58 PM   #20
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Follow up to the original post with results added for the mods :

Took the car back down to Straightline's Mustang dyno to see what I picked up with these mods :
Kooks 1 7/8" longtube headers & hi flow cats
SLP Loudmouth II
Rotofab CAI

Car is still running the OEM tune...until the cam goes in it.
Results : 422 rwhp/406 rwtq
Weather corrected results.

Graph showing stock baseline over mods.

On the rollers.
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Old 06-16-2010, 01:24 AM   #21
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i got very similar results...



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Old 06-16-2010, 02:25 AM   #22
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Heres mine...
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Old 06-16-2010, 02:39 AM   #23
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why didnt you post one with your aftermarket parts
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Old 06-16-2010, 03:04 AM   #24
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why didnt you post one with your aftermarket parts
Show's in my signature..Flowmaster cat-back AT exhaust and BBK intake NO tune...
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Old 06-16-2010, 03:07 PM   #25
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The numbers look right for a mustang dyno..they always are down about 10% vs. dynojet numbers. Straightline is a good shop...your car is in good hands!
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