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10-06-2010, 10:36 AM
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#1 |
 
Drives: IOM Camaro SS Join Date: Oct 2009
Location: Montreal
Posts: 14
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Low Dyno Numbers
Hey guys, I just went for my first dyno and tune. It's an L99 (got it 05/13/2009) with 12,700 Kms or 7,890 miles My mods are
SLP: Headers High flow cats X-Pipe (3'') Loudmouth 1 (3'') Blackwing cai. My first dyno run was done with Diablosport Trinity's diablo tune and the above mods: HP: 323 rwhp Tq: 337 rwt after custom tune: HP: 337 rwhp Tq : 350 rwt Now why do I have actual stock numbers with all those mods and either tune? SLP guaranteed 32 rwhp on an L99 with just the headers/no tune... Forget the fuse pull... The tuner guy uses the Mustang Dynomometer, which is said to give up to 40-50 hp less than the Dynojet. I never did a stock dyno run. I'm glad I didn't, because if I would've seen 290-300 rwhp I'd hang myself. I babied my car and did the ultra soft brake in... is that a sign? Thanks. |
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10-06-2010, 10:39 AM
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#2 |
 
Drives: 2013 ZL1 Join Date: Aug 2010
Location: Dallas
Posts: 402
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That makes no sense. I hit 350hp with just a CAI and cat-back exhaust.
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10-06-2010, 10:44 AM
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#3 |
        Drives: 2010 RY 2SS with Custom Stripes Join Date: Mar 2009
Location: Jennings, La.
Posts: 2,220
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Those really do sound low for the mods. What kind of dyno?
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10-06-2010, 10:46 AM
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#4 |
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Drives: IOM Camaro SS Join Date: Oct 2009
Location: Montreal
Posts: 14
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It's a Mustang Dynomometer
I also use 94 Octane fuel Mobile 1 syn. oil.
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10-06-2010, 10:46 AM
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#5 |
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Account Suspended
Drives: 2010 camaro Join Date: Sep 2010
Location: hannibal mo
Posts: 207
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Im assuming the a/f ratio is good with no knock. Take it to the track. Dyno numbers are nothing but that. Dont read into them too much. Oh and never trust manufacturer hp claims. Ever.
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10-06-2010, 10:46 AM
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#6 |
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Drives: 2013 ZL1 Join Date: Aug 2010
Location: Dallas
Posts: 402
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Mine was on a Dynojet. Not sure why there is such a large discrepancy across the two?
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10-06-2010, 10:47 AM
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#7 |
Drives: 2011 Chevrolet Camaro SS/RS Join Date: Jul 2010
Location: Texas
Posts: 367
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soft break in.... could be?....or the dyno....
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2011 2SS/RS RJT M6.
PCTXHN Ordered 8/4/2010 Built 9/28/2010 |
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10-06-2010, 10:47 AM
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#8 |
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So on a dynojet you'd be seeing around 377-387 rwhp. Stock L99's come in around 330, right? So thats a pretty decent gain (~50 hp) for your mods... What were you expecting?
That's why you always want a baseline, so you'll understand what your mods are giving you.
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Black 2SS ordered 1/4/2010, received 2/19/2010
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10-06-2010, 10:48 AM
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#9 |
Drives: 2010 IOM Camaro 2SS RS L99 Join Date: Sep 2010
Location: Katy Texas
Posts: 39
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I agree that something is wrong. I have an L99 and went from 326HP to 340HP with just an Airaid CAI mod. My dyno was also done on a Mustang Dynomometer.
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10-06-2010, 10:52 AM
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#10 |
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Drives: IOM Camaro SS Join Date: Oct 2009
Location: Montreal
Posts: 14
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Yep A/F ratio was fixed, it was all over the place before the custom tune.
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10-06-2010, 10:54 AM
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#11 |
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Account Suspended
Drives: 2010 camaro Join Date: Sep 2010
Location: hannibal mo
Posts: 207
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Then dont listen to the "my car made 898983983hp" guys. You wont know if its slow until you take it to the track. Im sure its fine.
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10-06-2010, 10:58 AM
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#12 |
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Drives: 2013 ZL1 Join Date: Aug 2010
Location: Dallas
Posts: 402
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Agreed. I'm not really about the number. All I know is that after my tune and Roto-fab CAI, it was night and day. A MUCH better driving experience
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10-06-2010, 11:04 AM
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#13 |
  
Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009
Location: Mich
Posts: 4,482
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Do they have any other L99 Camaros run on that dyno to compare to?
Dynos are like mpgs, yours may vary. Another good indicator is 1/4 mile mph. If you have any drag strips near you with a street night, see what the trap speed is. A car that is truly low on hp will have a real low trap speed compared to other Camaros. The other is the buttometer. Does it pull real strong? If so, probably nothing wrong. Not scientific, but low hp cars or those running on the low octane table feel like a dog and its obvious. If it shits and gits, probably nothing wrong. |
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10-06-2010, 11:06 AM
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#14 |
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So-Cal Race team!!
Drives: Tahoe LTZ,2010 2SS/M6 Camaro Join Date: Apr 2009
Location: Phillips Ranch ca. So-Cal
Posts: 5,973
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Bad gas?...fuse pull it .....Then drive it like you stole it!!!
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 WE RACE DEEP!!BBK Intake, Flowmaster AT cat back Barton shifter,Painted stripes,,Heritage grill,LED DRLs, Smokin Tires!! |
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