Stop the Drone - Helmholtz Style - Page 9 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BAD DAB · 09-20-2010, 12:09 PM

Great Ideal....Do you think these will be on the market soon?

Roger Ramjet · 09-20-2010, 03:41 PM

Quote:

Originally Posted by zepcom

You may have forgotten to accomidate for stainless steel "Growing" when heating up. Thus, your calculations may be off just a bit.

The sound attenuation happens a few hundred RPM below and above the design point. It kills the whole drone range.

Quote:

Originally Posted by zepcom

Did you make your J's adjustable? Perhaps 1" longer would do the trick...

No they are not adjustable. To raise the target RPM the J-pipes would need to be shorter.

GrinderSS · 09-21-2010, 04:31 PM

OK, I took my car to the shop today and had this mod made. Let me tell you folks, this is the REAL DEAL! It works beautifully! The peak range of my drone is GONE and the overall sound inside the car is substantially quieter at all RPM's.

I can not thank you guys enough for posting this mod, I was about to buy an entirely new exhaust system.

Here are a couple pics:

BigRed585Lbs · 09-21-2010, 05:17 PM

Congratulations!!!! It's awfully hard sometimes to take that step off into the unknown, but now you know the truth about the Helmholtz j-pipe mod and how well it works.

What kind/brand of mufflers are you using in your set-up?

BigRed585Lbs · 09-21-2010, 05:22 PM

My bad! You've got the first S-PIPE mod!!!!!!!!!!!!

Lead 'em on, Grinder!!!

GrinderSS · 09-21-2010, 05:44 PM

Quote:

Originally Posted by BigRed585Lbs

Congratulations!!!! It's awfully hard sometimes to take that step off into the unknown, but now you know the truth about the Helmholtz j-pipe mod and how well it works.

What kind/brand of mufflers are you using in your set-up?

No doubt about it, but I was resigned to replacing the exhaust anyway so I thought this was worth a try. Now I get the best of both worlds, a mean sounding exhaust and the ability to carry on a conversation while driving!

It's a JBA 3" competition exhaust with JBA 1 7/8" headers and high flow cats.

GrinderSS · 09-21-2010, 05:44 PM

By the way, this thread should be made sticky. EXTREMELY valuable!

GrinderSS · 09-21-2010, 05:47 PM

Quote:

Originally Posted by BigRed585Lbs

My bad! You've got the first S-PIPE mod!!!!!!!!!!!!

Lead 'em on, Grinder!!!

That would be two S pipes for SS! LOL! There wasn't room to fit a "J" shaped pipe in there with the muffler and I recall you or Roger mentioned that the shape doesn't matter, so S it was!

skar · 09-21-2010, 06:04 PM

Quote:

Originally Posted by GrinderSS

By the way, this thread should be made sticky. EXTREMELY valuable!

That would be a good idea.

BigRed585Lbs · 09-21-2010, 06:08 PM

I just hope that this enthusiasm is highly contagious in this forum. There's a lot of folks still complaining about drone with all brands of exhaust systems, and you've just shown them that they, too, can have a great sounding experience with just a little thinking outside the "usual" box. Maybe if they see it coming from a couple of Camaro guys, they'll start j-ing and s-ing!!!

I see more clearly now:
http://jbaheaders.com/feature_pages/2010Camaro.asp

ssmike · 09-21-2010, 06:14 PM

Hey man, nice job on the "SS" pipes! Def needs to be a sticky thread, good info and proven technology!

Roger Ramjet · 09-21-2010, 06:24 PM

Maybe more people will give 'em a try.

GrinderSS · 09-21-2010, 09:46 PM

Quote:

Originally Posted by ZAPSSRS

Very cool. I wondered how J Pipes would even fit.

What RPM was your Drone and how what was the length of these S Pipes?

Tough part will be finding a shop that could do this.

I was concerned about the pipe shape too, but the S pipe works great. The length is the critical dimension; mine is 2.25" x 28" which cleared my drone range which was 1700-2000 RPM.

Just call a few muffler shops and ask if they have the ability to make custom pipes (i.e., they need a pipe bender) and if they have an ASE certified mechanic. Then just take a couple pictures of the J-pipe/S-pipes from this thread an show the mechanic, he should be able to fix you up.

zepcom · 09-22-2010, 07:35 AM

Nice job, Grinder!

Interesting interpretation of the shape, but if it fits, that rocks. I have noticed from the "under the rear" pics on this board that GM did not leave much room for extra plumbing on the rear of the zeta-II chassis.

Looks nice!

09-20-2010, 12:09 PM	#113
BAD DAB Drives: 2010 Camaro 2SS/RS Black & Silver Join Date: Aug 2010 Location: Richmond, VA Posts: 8,228 View My Garage	Great Ideal....Do you think these will be on the market soon? __________________ STAINLESS WORKS HEADERS-TUNED BY JANNETTY RACING-C.A.I. INTAKE-TAYLOR 409 WIRES-SOLO AXLE BACK EXHAUST-ELITE CATCH CAN

09-21-2010, 04:31 PM	#115
GrinderSS Account Suspended Drives: IOM 2SS/RS Join Date: Jun 2010 Location: Florida Posts: 539 View My Garage	OK, I took my car to the shop today and had this mod made. Let me tell you folks, this is the REAL DEAL! It works beautifully! The peak range of my drone is GONE and the overall sound inside the car is substantially quieter at all RPM's. I can not thank you guys enough for posting this mod, I was about to buy an entirely new exhaust system. Here are a couple pics: Attached Images

09-21-2010, 06:24 PM	#124
Roger Ramjet Motor Head Drives: CTS-V Join Date: Feb 2009 Location: So MD Posts: 494	Maybe more people will give 'em a try. __________________ History Camaro's: 83, 93, 95, 98, & 10.

09-22-2010, 07:35 AM	#126
zepcom Zeta Brother to Camaro Drives: 2009 Pontiac G8 GT Join Date: Oct 2009 Location: Buffalo NY Posts: 43 View My Garage	Nice job, Grinder! Interesting interpretation of the shape, but if it fits, that rocks. I have noticed from the "under the rear" pics on this board that GM did not leave much room for extra plumbing on the rear of the zeta-II chassis. Looks nice! __________________ --zepcom 2009 Pontiac G8 GT SOLO Performance HF-Cats & SOLO Mach Unbalanced Catback with drone-free J-pipes

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09-21-2010, 05:17 PM	#116
BigRed585Lbs Drives: Sierra and Tahoe Join Date: Jul 2010 Location: By Marion, MS Posts: 1,324 View My Garage	Congratulations!!!! It's awfully hard sometimes to take that step off into the unknown, but now you know the truth about the Helmholtz j-pipe mod and how well it works. What kind/brand of mufflers are you using in your set-up?

09-21-2010, 05:22 PM	#117
BigRed585Lbs Drives: Sierra and Tahoe Join Date: Jul 2010 Location: By Marion, MS Posts: 1,324 View My Garage	My bad! You've got the first S-PIPE mod!!!!!!!!!!!! Lead 'em on, Grinder!!!

09-21-2010, 05:44 PM	#119
GrinderSS Account Suspended Drives: IOM 2SS/RS Join Date: Jun 2010 Location: Florida Posts: 539 View My Garage	By the way, this thread should be made sticky. EXTREMELY valuable!

09-21-2010, 06:08 PM	#122
BigRed585Lbs Drives: Sierra and Tahoe Join Date: Jul 2010 Location: By Marion, MS Posts: 1,324 View My Garage	I just hope that this enthusiasm is highly contagious in this forum. There's a lot of folks still complaining about drone with all brands of exhaust systems, and you've just shown them that they, too, can have a great sounding experience with just a little thinking outside the "usual" box. Maybe if they see it coming from a couple of Camaro guys, they'll start j-ing and s-ing!!! I see more clearly now: http://jbaheaders.com/feature_pages/2010Camaro.asp

09-21-2010, 06:14 PM	#123
ssmike BL1ZZRD Drives: '16 Camaro 2SS, '20 Equinox Redline Join Date: Jul 2009 Location: Buffalo, NY Posts: 7,840	Hey man, nice job on the "SS" pipes! Def needs to be a sticky thread, good info and proven technology!