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

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Old 05-14-2010, 05:32 PM   #1
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Back from the dyno... 397whp, 392 torque (barely modified!)

I just got back from a trip to the dyno with my friends, and I've gotta say, I'm impressed. My car put down 397.16 whp, and 392.71 wheel torque!! As of right now, all I have done is a Cold Air Inductions intake, and a muffler delete. Run conditions were 74 degrees with 34% humidity. I was pretty happy with those numbers! I thought I would need headers to crack the 400 mark, but I'm close as it sits now. Can't wait to do a few more mods!

So are these numbers decent considering the light mods I've done??
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Old 05-14-2010, 05:35 PM   #2
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OMG that is awesome. Congrats!!!
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Old 05-14-2010, 05:37 PM   #3
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Old 05-14-2010, 05:58 PM   #4
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Don't mean to rain on your parade but those are STD numbers. Corrected should bring those numbers down to mid 380's for HP. That is more inline with what you should be running with a CAI. Your muffler delete shouldn't have made much, if any, performance difference.
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Old 05-14-2010, 06:10 PM   #5
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Quote:
Originally Posted by Spiffyguitar View Post
I just got back from a trip to the dyno with my friends, and I've gotta say, I'm impressed. My car put down 397.16 whp, and 392.71 wheel torque!! As of right now, all I have done is a Cold Air Inductions intake, and a muffler delete. Run conditions were 74 degrees with 34% humidity. I was pretty happy with those numbers! I thought I would need headers to crack the 400 mark, but I'm close as it sits now. Can't wait to do a few more mods!

So are these numbers decent considering the light mods I've done??
Those are pretty good numbers. You should get long tube headers and you will be in the 400s for sure. I put a polished Rotofab cai, Kook 1 7/8 headers with high flow cats and kept the stock exhaust all the way back, pulled 421 RWHP and 419TQ. I assume yours is a LS3 like mine.
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Old 05-14-2010, 09:54 PM   #6
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Those are pretty good numbers. You should get long tube headers and you will be in the 400s for sure. I put a polished Rotofab cai, Kook 1 7/8 headers with high flow cats and kept the stock exhaust all the way back, pulled 421 RWHP and 419TQ. I assume yours is a LS3 like mine.
Nice!! Yeah... I have an LS3. I'm looking at throwing some 1 7/8 headers on my car before too long. I'm still debating on a cam (since this car is currently being daily driven). Either way, I love how LS motors respond to mods.
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Old 05-14-2010, 11:00 PM   #7
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Originally Posted by axis View Post
Don't mean to rain on your parade but those are STD numbers. Corrected should bring those numbers down to mid 380's for HP. That is more inline with what you should be running with a CAI. Your muffler delete shouldn't have made much, if any, performance difference.
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Old 05-14-2010, 11:41 PM   #8
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+1
Either way I'm happy. Haha
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Old 05-15-2010, 12:11 AM   #9
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Either way I'm happy. Haha
That's the most important part. Go ahead and slap those headers on and you'll be well over 400whp.
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Old 05-15-2010, 06:52 AM   #10
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very good #'s, even if it's STD hp/tq. Much cooler weather than when I ran though at 96 degrees! Chevy must have added some juice to yours

I'm at 384 with catback and cai, so I'd be real happy with your #s. congrats!
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Old 05-15-2010, 12:11 PM   #11
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Quote:
Originally Posted by Spiffyguitar View Post
Nice!! Yeah... I have an LS3. I'm looking at throwing some 1 7/8 headers on my car before too long. I'm still debating on a cam (since this car is currently being daily driven). Either way, I love how LS motors respond to mods.
1 3/4 if you go with a cam

1 7/8 if you go with forced induction (supercharger, turbocharger).


1 7/8 actually show's a loss in torque if left with a setup like cai/headers/catback.
1 3/4 = no loss
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Old 05-15-2010, 12:13 PM   #12
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nice numbers!!
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Old 05-15-2010, 08:29 PM   #13
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1 3/4 if you go with a cam

1 7/8 if you go with forced induction (supercharger, turbocharger).


1 7/8 actually show's a loss in torque if left with a setup like cai/headers/catback.
1 3/4 = no loss
Nice! Looks like 1 3/4 might be with way to go for me then because I plan on keeping it all NA. I will probably have to wait awhile on the cam until I can get a daily driver. :( I don't want to completely destroy mileage until then. LOL.
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Old 05-16-2010, 10:33 AM   #14
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Originally Posted by Bonemaro View Post
1 3/4 if you go with a cam

1 7/8 if you go with forced induction (supercharger, turbocharger).


1 7/8 actually show's a loss in torque if left with a setup like cai/headers/catback.
1 3/4 = no loss

This has been proved incorrect by many dyno tests. You can do a seach for Jannettys header test for more details.

From Jannetty's test: http://www.camaro5.com/forums/showth...header+testing
Our Test Car is none other than, Bigdogs LS3 Camaro used in our CAI test.
This Car is 100% Stock other than the Headers installed for the Testing.

Stock Peak Numbers 373 RWHP 378 RWTQ
Stock Average Numbers I will post tomorow Forgot to print them.

1.75 long tube headers w high flow cats Peak 401.1 HP 403.8 TQ
1.75 long tube headers w high flow cats Average 281.2 HP 363.9 TQ

1.875 long tube headers w high flow cats Peak 406.8 HP 407.5 TQ
1.875 long tube headers w high flow cats Average 283.7 HP 366.6 TQ

2.0 long tube headers w high flow cats Peak 411.7 HP 408.9 TQ
2.0 long tube headers w high flow cats Average 288.1 HP 368.1 TQ

The 1 3/4 Headers did Surprisingly well.
The 1 7/8 Headers IMO are the best all around header.
The 2.0 Headers are neck and neck with the 1 7/8 but Slightly stronger from 5000 to 6300

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Old 05-16-2010, 10:44 AM   #15
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This may be an extremely noobish statement.. but I thought the LS3 has 426hp stock?
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Old 05-16-2010, 10:55 AM   #16
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Just found my answer in another thread... disregard the noobish question.
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Old 05-16-2010, 12:56 PM   #17
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Quote:
Originally Posted by SGOS252382 View Post
This has been proved incorrect by many dyno tests. You can do a seach for Jannettys header test for more details.

From Jannetty's test: http://www.camaro5.com/forums/showth...header+testing
Our Test Car is none other than, Bigdogs LS3 Camaro used in our CAI test.
This Car is 100% Stock other than the Headers installed for the Testing.

Stock Peak Numbers 373 RWHP 378 RWTQ
Stock Average Numbers I will post tomorow Forgot to print them.

1.75 long tube headers w high flow cats Peak 401.1 HP 403.8 TQ
1.75 long tube headers w high flow cats Average 281.2 HP 363.9 TQ

1.875 long tube headers w high flow cats Peak 406.8 HP 407.5 TQ
1.875 long tube headers w high flow cats Average 283.7 HP 366.6 TQ

2.0 long tube headers w high flow cats Peak 411.7 HP 408.9 TQ
2.0 long tube headers w high flow cats Average 288.1 HP 368.1 TQ

The 1 3/4 Headers did Surprisingly well.
The 1 7/8 Headers IMO are the best all around header.
The 2.0 Headers are neck and neck with the 1 7/8 but Slightly stronger from 5000 to 6300



are the Doug Thorley shorty headers for the SS 1 7/8"?
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Old 05-16-2010, 01:16 PM   #18
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This may be an extremely noobish statement.. but I thought the LS3 has 426hp stock?
At the crank yes....
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Old 05-16-2010, 01:30 PM   #19
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As stated before, those are STD numbers.. the industry standard, so to speak, on a dyno jet are SAE numbers, which would put your somewhere in the mid 38x hp range... which seems about on par. Maybe a little bit high actually. Again... next time, I would ask for SAE numbers, as it sets a level playing field, because it compensates for pressure, humidity, air temp, etc. It gives you a better idea on comparing it to other dynos. Going to a dyno jet dyno and getting STD numbers is just someone looking for high dyno queen numbers. If you want to use the dyno as a tool, as it's intended to be, and not a measuring device, go with SAE. If you just wanna show off, get STD.

should you choose to get headers, please... do not get 1 3/4. as stated before... a 1 3/4 header does not belong anywhere near one of these motors, performance wise. Unless you have a very picky state on inspections/emission, longtube 1 7/8 all the way (catted or not catted, up to you). Even if my car was just a bolt on car, I would still not even think about putting a 1 3/4 primary header on it.
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Old 05-16-2010, 03:53 PM   #20
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Originally Posted by Bonemaro View Post
1 3/4 if you go with a cam

1 7/8 if you go with forced induction (supercharger, turbocharger).


1 7/8 actually show's a loss in torque if left with a setup like cai/headers/catback.
1 3/4 = no loss
Another Dr. Wrench bites the dust......
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Old 05-16-2010, 03:54 PM   #21
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Nice numbers man i would be proud hell i might just put that dyno paper on my fridge.
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Old 05-16-2010, 03:59 PM   #22
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are the Doug Thorley shorty headers for the SS 1 7/8"?
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Old 05-16-2010, 04:05 PM   #23
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I believe thorley headers are only offered in 1 3/4 but 1 7/8 may be forthcoming
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Old 05-16-2010, 08:02 PM   #24
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hmm, yeah it's crazy that nowhere on the website or in my shipping information does it say what diameter they are, or anywhere on the internet that I could find for that matter.
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VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
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Old 05-16-2010, 08:20 PM   #25
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Wow...those numbers are spectacular for a near stock rig! Congrats.

Quote:
should you choose to get headers, please... do not get 1 3/4. as stated before... a 1 3/4 header does not belong anywhere near one of these motors, performance wise. Unless you have a very picky state on inspections/emission, longtube 1 7/8 all the way (catted or not catted, up to you). Even if my car was just a bolt on car, I would still not even think about putting a 1 3/4 primary header on it.

Have you not seen the Doug Thorley 1 3/4" vs Brand X 1 7/8" dyno chart that was done by an independant (RPM Inc.) shop??

Quote:
I believe thorley headers are only offered in 1 3/4 but 1 7/8 may be forthcoming
Yes...still a ways off though.

Quote:
..what diameter they are, or anywhere on the internet that I could find for that matter..
1 3/4" Sir!


As far as headers go..1 3/4" Doug Thorleys.....all day long sir! No need to go to a 1 7/8" unless you are planning on perhaps a S/C setup or something like that later.

PM me and I would be happy to help or answer some more questions for you and again, nice numbers!
-Ivan
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