Thanks for the article. Quite informative.

Anyone have the Hooker Maximum Flows? I just found out about them. I'd like to hear what they sound like.

 

IMO seems to be a dispute between loud and not-so-loud. Again, IMO I bet between Dynomax and Flowmaters, othen than sound, can't be enough HP to matter. OK let the flames begin.

 

Check out this sound clip.

Hooker Aero Chamber
Sound clip

 

Wery good info there.
i am looking for 500hp and maximum torque in low rpm in the future.

Guess it will take a few yers before i am there. have installed a Hi performance suspension package, new brakes, rack and pinion steering and 3,70 gears in the diff this winter.

Next will be to make the exhaust ready for future modifications. (the underside of the car will lokk better than the rest of the car when i do.)

Exhaust: The plan is to go with 2,5" inch dual pipe, 2x 550cfm flow muffler( dont now wich, why dont the manifactors inform about flow??) Also need headers. but werry unsure wich to chose. Evaluating stans.
Anyone have recomandations on primary and colector size??? (my engine is a stock 454BB. But when i change exhaust i will make it ready for handle 500hp. But i want as much torque in low RPM. Not a high RPM engine, that it seems most people want.

 

I don't think they were "Alan's". They were not restrictive. The car sounded like a big block at idle. I loved it!! but driving around town it just got to be to loud. You could hear the car 1/4 mile away. The chambered section is only the length size of the factory muffler. Keep checking ebay they do pop up once in a while.

 

i have delta 40's on the '81 now and they are really loud with the new engine. i still like the sound but they're dang near race car loud. i have magnaflows on the c5 and they are some of the best sounding mufflers on the LS motors. not sure how that translates to 1st gen SBC but when i redo the exhaust on the '81, it'll probably be with magnaflows.

 

If you want that 'pump jockey special' sound from your Vette than the best choice would be those welded steel cans like Flowmasters.

 

Magnaflows are by far the quietest aftermarket muffler out there. They are great quality and have a flow through design but don't kid yourself....they are freakin quiet. I too like the dynamax ultra flows over the Magnas but my all time favorites are still flowmaster 40s.... The sound is one of a kind and is ALL MUSCLECAR....BFD, you lose 10hp.... Lots of 10 sec cars running around on flowmaster 40s.

Hooker aero chambers flow well and sound decent, a tad raspy at times but nothing like the gawd aweful hooker max flows. Might as well stick cherry bombs on it.

My friend just put dual magnaflows on his 95 LT1 vette, they do look good and sound better then stock but...not much.

And don't always be fooled by the "straight through" design. That doesn't necessarily mean good flow. All the perforations in the pipe that let the exhaust going into the fiberglass matting/packing(what makes it quiet) can cause some serious turbulence in the pipe.

We see this all the time in the sportbike world. ALL aftermarket pipes for sportbikes are "straight through" with a big ole hole you can see through etc...you would be suprised how many of them don't make as much power as others. Total lack of scavenging through the pipe. I went from one $750 exhaust system to a $1100 exhaust system on my busa and gained almost 5hp...thats a lot on a bike. Both were "straight through"

I have the same problem on my LS1 car. I have a borla catback with the 3"x19" borla "straight through" muffler. It sounds good at during hard throttle but at idle, it sounds damn near a stock muffler. I have an electric cut out thats built into the borla system right before the muffler, my car gains 10hp up top with the cut out open, completely bypassing my 3" "straight through" muffler.

 

I have dynomax mufflers. Sound Clip:
http://24.118.233.41/vetteexhaust.wma
BTW that is only a 2200 rpm rev. So for some reason mine are rather loud.

 

I had those delta flows on mine, so freakin loud with 3 inch exhaust and 550HP other cars would stop 20 feet behind me at lights, and there were two lanes too

Some might think that's cool and it is for about a day or so then it gets real old real fast

 

I put magnaflows on my 68 camaro,with a 350/350 hp crate motor and its sounds great,its a 2.5 system

 

After visiting Spintech's site, I think I'm going to get their Pro Street series mufflers.

 

Any chance of getting a part number on yours? The only Dynomax I see on Mid America are these (no straight through) http://www.madvet.com/shop?frame=1.119.1308

 

look, i don't mean to offend, either members or vendors, but why on gods green earth would you pay the "corvette tax" for that muffler system from MAM? you're paying double what you would pay if you bought all those individual components from someplace like summit or jegs.
i'm not trying to slam MAM per se, but let's all get real. mike has made some money off selling us these parts. he doesn't need to screw us just because he prints a catalog with a vette emblem on the cover.

 

This is harsh... but true.

 

I agree and I fully plan on buying the Dynomax's from a buddy who runs a local exhaust shop but, I'm trying to figure out the part number on these mufllers. I do use MAM for the vette replacement parts though... I always lookup the part in MAM, Corvette Central and Ecklers before purchasing though.

 

i didn't mean to come off sounding harsh like justin said, but i can certainly see where i did. like you, i shop those three whenever i need corvette specific parts as they tend to have the best availability. and when i find that corvette specific part, i know i'm going to pay that premium. it is the cost of ownership. however, buying mufflers or a cam or even tires from one of the three is just silly to me because i know how over the top their pricing is compared to just about anywhere else.
so i'm not trying to offend you or anybody else. consider it a notice for those newly initiated to the hobby that just because it came on a corvette, doesn't mean the only place you can get it is from a corvette vendor. just trying to encourage smart shopping.

 

I have HOOKER max flows but not on my Vette. I'm satisfied with the sound AND the performance.

 

I discovered that the maxflows have one of the highest flow ratings but it's also one of the quietest at 80db@idle. I like it louder. I want the best of both worlds so that's why I'm getting Spintech's Pro Street mufflers. It's rated at 87db@idle (no muffler is 91db@idle) and people who use them say they sound "aggressive", "mean", "they are about as loud as 2 chamber Flow's but have a better, different sound without the resonance."

 

When problems w flow master is that you loose 10hp on a 500hp system. Why not run 3" muffler on 2 1/2" pipe. ???????