Gained HP from removing mufflers. +17hp (with dyno) - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Roger Ramjet · 06-11-2009, 10:48 PM

HP number looks a little high. Crankshaft HP is calculated not measured. Corvette experience tells me that the drivetrain loss is about 11 percent when the pull is done in 4th gear. The dyno shop may have given you a few HP in the calculation.

To get a good comparison of dyno pulls I always use my own weather station and do the SAE correction myself.

lawdogg149 · 06-11-2009, 10:52 PM

I did my own corrections as well with my Iphone weather readings. Pulled in 3rd gear

lawdogg149 · 06-11-2009, 10:55 PM

+

2010 SS RS · 06-12-2009, 08:08 AM

Lawdogg. Thanks for posting this dyno reading up. I can feel the difference in mine from the seat but I thought it might be just the engine getting broke in a bit. This is very good results. I really was not expecting more than 5HP out of the straight pipe mod and hoped for another 5 when CAI mod complete. I am working on getting info on another inexpensive mod for the CAI. Using the existing factory plastic box and mass flow sensor, my plans are to modify the factory intake box and install a high flow CAI filter inside to increase air intake to aftermarket specs. I will let you know and post up a video as I get that done. Once again thanks for the documentation. Your job looks great by the way. I see you also saved those stock factory tips..

SS looks really good too!

Here is the link to the videos with sound clips:
http://www.camaro5.com/forums/showthread.php?t=24815

lawdogg149 · 06-12-2009, 08:45 AM

Great let me know. I have a great connection for a dyno that is free. I will do anything cheap that will give any gains.

JJ2010 · 06-12-2009, 09:34 AM

Has anybody did a muffler delete on the L99 yet?

If so how did it sound?

*radz28* · 06-12-2009, 10:20 AM

Great info'. Thanks for sharing. When you post up a sound clip or video I'll add it to the sticky

A.R. Headers · 06-13-2009, 11:23 AM

Quote:

Originally Posted by JJ2010

Has anybody did a muffler delete on the L99 yet?

If so how did it sound?

We did a muffler delete on a 6.0 G8 GT. Better yet, we tested the G8 GT mufflers by disconnecting them completely from our header system and gained a whopping 3 HP. Granted the LS3 produces more power but 17 RW seems high considering our header system gained 32 rw before the tune and with stock mufflers.

Nick

LDGn63 · 06-13-2009, 11:28 AM

lawdog...
i still need info on your "guy"

lawdogg149 · 06-13-2009, 06:55 PM

Sent PM LDgn63.

LDGn63 · 06-16-2009, 10:52 AM

THX!

I stopped by my local shop yesterday... they cant do it until late in the week.
if it doesnt pan out i'll call.

thanks again!

Legend · 06-16-2009, 10:56 AM

Got mine scheduled for Thursday...I'm going to try and get a base dyno run at the shop that morning and then another after the mod...I'll post my results then.

WeeZee · 06-16-2009, 04:14 PM

Man thats great bro keep up the good work. Best bang for the buck would be a muffler delete and a set of 275 35 20 drag radials hands down. I would be willing to bet an average driver could run mid 12's with ease

06-11-2009, 10:48 PM	#15
Roger Ramjet Motor Head Drives: CTS-V Join Date: Feb 2009 Location: So MD Posts: 494	HP number looks a little high. Crankshaft HP is calculated not measured. Corvette experience tells me that the drivetrain loss is about 11 percent when the pull is done in 4th gear. The dyno shop may have given you a few HP in the calculation. To get a good comparison of dyno pulls I always use my own weather station and do the SAE correction myself. __________________ History Camaro's: 83, 93, 95, 98, & 10.

06-12-2009, 08:08 AM	#18
2010 SS RS Drives: 2010 2SS/RS IBM Black Polished Join Date: Feb 2009 Location: Colorado Posts: 2,106	Lawdogg. Thanks for posting this dyno reading up. I can feel the difference in mine from the seat but I thought it might be just the engine getting broke in a bit. This is very good results. I really was not expecting more than 5HP out of the straight pipe mod and hoped for another 5 when CAI mod complete. I am working on getting info on another inexpensive mod for the CAI. Using the existing factory plastic box and mass flow sensor, my plans are to modify the factory intake box and install a high flow CAI filter inside to increase air intake to aftermarket specs. I will let you know and post up a video as I get that done. Once again thanks for the documentation. Your job looks great by the way. I see you also saved those stock factory tips.. SS looks really good too! Here is the link to the videos with sound clips: http://www.camaro5.com/forums/showthread.php?t=24815 __________________ 418 Stroker, 621RWHP 648 lbs TORQUE Built by Laramie GM Auto Center Tuned by Nick at Mac Autosport. EForce SC, 2 3/4pulley,LPE dual fuel pump, JRE Twin fuel rail upgrade, posi clutch kit, RX oilcatch can and breather, Callies Compstar crankshaft and rods, Racing bearings, CP -13.8 race pistons, steel rings, Comp Cams X6 blower cam, Springs, HD timing chain and tensioner, Doug Thorley Tri Y LT headers, 89.7lb injectors, RPM rollbar, DSS1400 shafts, Simpson 5 pt harness, BMR Toe rods and trailing arms, led lights, RPM input and output shafts

06-12-2009, 10:20 AM	#21
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,795 View My Garage	Great info'. Thanks for sharing. When you post up a sound clip or video I'll add it to the sticky __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

06-13-2009, 11:28 AM	#23
LDGn63 Drives: WNABEE Join Date: Jan 2009 Location: DFW Posts: 538 View My Garage	lawdog... i still need info on your "guy" __________________ Why oh Why? Windshield=10" vertical mirror= 3 7/8" (that's almost 4") vertical that means that the mirror is 38.75% the size of the vertical windshield... it sure seems like the ratio could be better... just sayin.... our collective MIRROR patch: http://www.camaro5.com/forums/showthread.php?t=24612

06-16-2009, 10:52 AM	#25
LDGn63 Drives: WNABEE Join Date: Jan 2009 Location: DFW Posts: 538 View My Garage	THX! I stopped by my local shop yesterday... they cant do it until late in the week. if it doesnt pan out i'll call. thanks again! __________________ Why oh Why? Windshield=10" vertical mirror= 3 7/8" (that's almost 4") vertical that means that the mirror is 38.75% the size of the vertical windshield... it sure seems like the ratio could be better... just sayin.... our collective MIRROR patch: http://www.camaro5.com/forums/showthread.php?t=24612

06-11-2009, 10:52 PM	#16
lawdogg149 Drives: Corvette ZO6 CSR edition #47 Join Date: Apr 2009 Location: Calhoun, GA Posts: 766 View My Garage	I did my own corrections as well with my Iphone weather readings. Pulled in 3rd gear

06-11-2009, 10:55 PM	#17
lawdogg149 Drives: Corvette ZO6 CSR edition #47 Join Date: Apr 2009 Location: Calhoun, GA Posts: 766 View My Garage	+

06-12-2009, 08:45 AM	#19
lawdogg149 Drives: Corvette ZO6 CSR edition #47 Join Date: Apr 2009 Location: Calhoun, GA Posts: 766 View My Garage	Great let me know. I have a great connection for a dyno that is free. I will do anything cheap that will give any gains.

06-12-2009, 09:34 AM	#20
JJ2010 Drives: 2010 Camaro SS Join Date: Oct 2008 Location: Smithfield,NC Posts: 1,203	Has anybody did a muffler delete on the L99 yet? If so how did it sound?

06-13-2009, 06:55 PM	#24
lawdogg149 Drives: Corvette ZO6 CSR edition #47 Join Date: Apr 2009 Location: Calhoun, GA Posts: 766 View My Garage	Sent PM LDgn63.

06-16-2009, 10:56 AM	#26
Legend Hello! Drives: 2008 JSB Z06! Join Date: Oct 2008 Location: Texas Posts: 2,624 View My Garage	Got mine scheduled for Thursday...I'm going to try and get a base dyno run at the shop that morning and then another after the mod...I'll post my results then.

06-16-2009, 04:14 PM	#27
WeeZee Drives: SuperSport's Join Date: May 2009 Location: Michigan Posts: 382	Man thats great bro keep up the good work. Best bang for the buck would be a muffler delete and a set of 275 35 20 drag radials hands down. I would be willing to bet an average driver could run mid 12's with ease

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