Mandrel pipes /magnaflow/flowmaster crazy?

[Chad D]

Has anyone used a Helmholtz resonator?  I've heard of them being used with success to eliminate drone, but I have no idea how to spec them, I'm definitely interested in learning more...  From what I understand, they're a blind pipe of specific diameter and length (dependent on drone frequency and system volume) attached to the system to dampen the acoustic resonance of the system.

[drdano]

My $0.02.  A grand isn't a bad price for a full mandrel system that is servicable.   You get what you pay for with exhaust systems.  A $500 exhaust unfortunately anymore is going to suck.  We've all been down this road before trying to save money and the first time you try to pull the system off you'll get to enjoy cutting it up or swearing for several hours.  My vote is to do it yourself with pre-bent mandrel pipes or pony up the money for the full mandrel system. 

A word of advice, tell the shop you want to inspect the system when it is tacked in place, not fully welded and that you demand it be on the lift in the air when you come to pick it up so you can inspect their work.  Most shady shops will either not do this or refuse to "for insurance reasons", and if so find another shop.

[My427stang]

Has anyone used a Helmholtz resonator?  I've heard of them being used with success to eliminate drone, but I have no idea how to spec them, I'm definitely interested in learning more...  From what I understand, they're a blind pipe of specific diameter and length (dependent on drone frequency and system volume) attached to the system to dampen the acoustic resonance of the system.

I have not, but in theory you should be able to fix it. The issue i have is, Flowmasters cost the same or more than other mufflers, make a little less power, and then you have to do something like that to boot?

Much easier to buy a muffler that doesnt drone LOL 

FWIW the F100 has the 3 inch 3 chamber Deltaflows off the Mustang, I figured I wouldn't hear them under the bed, but my guess is you'll see a set of Borlas under the truck at some point too.

[Marx427]

Geez...........am I the only guy around running Cherry Bombs...?     

 I just could never get used to..........well......mufflers........

Burnt out Glass Packs are  the only way to go....Rrrraaaaaaapp....pop..pop.....pop......pop pop pop......pp.....p...pop..............p..

Along that line,   anyone out there remember Purple Hornies ?   Those were the absolute best......
......sounding,, anyway.....IMO... .........ie .......LOUD!

Also ..  IMO ..the absolute worst sounding muffler of all time was the "Golden Goose".......
   It literally sounded like  a goose call .........
Now,    you really go way back if you remember that name.......of course, not as far as Smithy's ...but that's another  story....

M

[jayb]

I love Cherry Bombs!  A pair of Cherry Bombs was my very first hot rodding purchase back in April of 1976 LOL!  Hacked off the factory exhaust halfway back and hung the Cherry Bombs on there.  They hung down so low they led to my second hot rodding purchase, Gabriel Hi-Jackers 

[machoneman]

Gabriels, Cherry Bombs  and Purple Hornies......LMAO! Hey we should come up with a list of old speed stuff, shops, brand names, etc.

Whatver happened to:

-SuperShops?
-Ansen mag wheels?
-STP?
-Sunoco 260? I miss that great smell!
-Thrush mufflers?
-Splitfire spark plugs?

Ideas?

[Heo]

  Gabriel highjackers was standard equipment around here
and longer shackles.CalCustom Valvecovers . Pos.A.Traction torquetwisters.
and Formula1 superstock.Tires.....Lee manhandler.Jetson revenger
Sorry for HIGHJACKING the tread

[amdscooter]

Just stopped by the muffler shop again today to tell him I'd probably be in soon. The guy agreed that the Flowmasters do have a lot of interior noise/resonance. Asked him for his opinion on Borla vs. Magnaflow, he says go Magnaflow. The only differnce on his original quote of $650 for 2.5" all the way to the rear bumper would be any difference in the price of the Flowmaster and Magnaflow which overall is nominal.

[bartlett]

got my car back tonight , Im 1g lighter but WOW he did a great job and it looks cool .. Its all tucked up real good and all the flanges are sweet ! I can take off each side without removing the tail pipes or both sides and leave the tail pipes on .. Pretty cool IMO ... He hooked up my wideband 02 also ... 

 Its idling at 10:1  driving at 13.5 or so and 15s when I nail it ... Looks like I have some tuning to do ... That scares me being it is STUPID fast as it is .... It pulls like a train untill 3,5/4 g and then it hits another world ! Above 4g it feels like the car wants me in the back seat and the rearend to rip off the car ! 

  The bad :   The car is vibrating to much for my liking, The motor mounts I got are like a solid poly mount. very rigid. What are you guys with HP running for mounts ... I broke to stockers with my low hp motor ....

 

 

[amdscooter]

Toss up a few pics if you get a chance.. I'd love to see it.

[jayb]

I always run stock mounts, and put an engine movement limiter strap in place to keep the engine from torquing over too much.  Seems to save the mounts, too...

[bartlett]

Jay:  engine movement limiter strap 

Can you hook me up with a picture ?  I might be switching back to stock mounts and a strap ... I want to try a couple of things first. My mounts came with a washer on each side of the poly. Im thinking this might be making them Real solid insted of poly dampend. 

 I just cringe thinking of changing mounts......   there a major pain ....

[bartlett]

p.s. Ill be putting the car up on stands soon , So I will grab some pic's ....