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Old 08-19-2009, 07:20 AM   #18
acatlover13
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Two questions...does anyone know somewhere in NW FL I can go to dyno my car, and what tuners are you guys using? Someone mentioned a Diablo Sport, but what else? Thanks guys!!
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Old 08-22-2009, 05:13 PM   #19
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Quote:
Originally Posted by acatlover13 View Post
Two questions...does anyone know somewhere in NW FL I can go to dyno my car, and what tuners are you guys using? Someone mentioned a Diablo Sport, but what else? Thanks guys!!
If you can drive to Tampa, Jeremy Formato is a great tuner. He is very respected in the LSX community.
www.fasterproms.net

He also visits different tuning shops in other area of Florida.
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Old 08-28-2009, 09:42 PM   #20
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Advertised 400 HP

How does GM get away with advertising the HP at 400 for the L99 and 426 for the LS3 when no one has dyno'd that? Did I miss something in the fine print?
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Old 08-28-2009, 10:55 PM   #21
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How does GM get away with advertising the HP at 400 for the L99 and 426 for the LS3 when no one has dyno'd that? Did I miss something in the fine print?
These Dyno's calculate RWHP (rear wheel Horse power) Chevy calculates Horse Power at the crank.
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Old 08-28-2009, 11:06 PM   #22
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Might as well post mine here.

First run is stock at about 700 miles.

Second run is with rotofab cai and a tune done about two weeks later.

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Old 08-30-2009, 08:12 PM   #23
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Quote:
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How does GM get away with advertising the HP at 400 for the L99 and 426 for the LS3 when no one has dyno'd that? Did I miss something in the fine print?
Because despite what Top Gear tried to promote in their dyno test of a GT500, the number that is advertised is not the same as what you will be testing when you strap it down for a dyno run. GM and every single other automaker out there rates their engines with an engine dyno. This is a test rig that measures the output of the engine. A chassis dyno, which is what you most often see, measures the power at the wheels. This is the power at the crank minus any losses from the drivetrain.
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Old 08-31-2009, 10:28 AM   #24
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Thanks guys. I better understand the process now. Great explanations!
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Old 09-03-2009, 11:20 PM   #25
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Just dyno'd mine tonight, complete stock to the filter, 1050 miles, easy first 450, then having fun. Pulled fuses at about 600 miles.

About 85 degrees, first run 321hp, 336tq. Second run (about 1 minute idling rest) 313hp, 319tq
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Old 09-05-2009, 04:19 PM   #26
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Just dyno'd mine tonight, complete stock to the filter, 1050 miles, easy first 450, then having fun. Pulled fuses at about 600 miles.

About 85 degrees, first run 321hp, 336tq. Second run (about 1 minute idling rest) 313hp, 319tq

Your torque takes a major nose dive around 3500 rpms?
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Old 09-10-2009, 12:23 PM   #27
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how can so many stock L99s have some any different readings? i mean i know temp humidty things of that nature affect it, but i didnt realize it was that much...
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Old 09-17-2009, 04:28 PM   #28
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You have to remember that there are Mustang Dyno's which add a load to the drums where the rear wheels are turning and the load is based on the weight and Co efficient drag of the car being tested. A dyno jet doesn't really have that kind of load and is calibrated differently. Just remember that not all dyno's are the same. Just use it to get your tuning down and take it to the TRACK!!
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Old 09-18-2009, 12:12 AM   #29
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just got dyno'd few hours ago. 312hp.
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Old 09-23-2009, 11:05 AM   #30
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On a Dynojet dyno to compare numbers use the "SAE" correction factor. This accounts for the DA= density altitude, and all other atmospheric conditions correcting to sea level putting everyone on as close to the same playing field as possible.

The "STD" correction factor will give you a slighty higher number which is nice to look at but not correct, kinda a best case scenario.

If want to know what your car is making on that specific day on that specific dyno use NO corretion factor. This will most likely drop you number a good amount but it is what is actually produced on car "x" on dyno "x" with whatever the air is that day, on that dyno.


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Old 09-25-2009, 07:40 PM   #31
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I have my dyno results here. The first test was with a Roto Fab CAI. The second was with the CAI and Magna Flow 3" cat back system.

Best of each of 3 pulls gained 7 hp and and 6.44 ft lbs of torque. The lowest CAI only pull to the highest CAI/exhaust pull gained 12.44 hp and 17 ft lbs of torque.


Lowest to Best Comparison
CAI CAI+EXH
Tq 341.75 359.44
HP 337.06 349.50


Best to Best Comparison
CAI CAI+EXH
Tq 353.0 359.44
HP 342.44 349.50
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Last edited by ttss; 09-25-2009 at 08:04 PM. Reason: adding pics
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Old 09-25-2009, 10:20 PM   #32
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Quote:
Originally Posted by thebrainhart View Post
Just dyno'd mine tonight, complete stock to the filter, 1050 miles, easy first 450, then having fun. Pulled fuses at about 600 miles.

About 85 degrees, first run 321hp, 336tq. Second run (about 1 minute idling rest) 313hp, 319tq
Is it just me, or does this torque curve seem kind of shakey?
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Old 09-25-2009, 10:25 PM   #33
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By the AFR Im guessing this is untuned. Still great numbers though.
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Old 09-25-2009, 10:33 PM   #34
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I did not mention the first pulls were a week ago at about 1100 miles and the pulls today were at 1226 miles. Both times the car was already hot after a 20 minute drive to the shop. The car has not been tuned yet. Still debating the loss of warranty idea.
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