hey guys is there a big difference between spitech and the flowmaster race series mufflers? looking for good/concrete answers not personal favorites thanks Bill

 

ive posted this before that ive seen gains of 20whp opening a cutout over a slowdisaster. only 5whp after a dynomax ultra flow was installed.

the flowmaster is INSANLY loud, so if you like it loud.....
if i had to pic, it would be the spintech, but i prefer something with less noise.

 

Sorry to say it, BUT, you won't find anything but personal opinions on here. For some reason, a lot of people at TG.Org really have a dislike of anything Flowmaster. Personally, I think nothing sounds better than a 3" American Thunder kit, but that's just MHO.

 

flowmaster's sound great...but its a proven fact they don't flow like the competition...as far as loudness, i have dual 2.5's dumped underneath through dual pro streets, I dont' think its loud at all...I haven't really had it past 4 grand, but idle and the lower rpms are not that loud at all...

 

Flowmasters have great sound, I'll give them that. I've seen losses of 20hp on a chassis dyno with the flowmaster and 35hp with spintech. This was on an LS1 SS with LT's and no cats. Same car, same day, same dyno, same tune. Best one we had on the car that day was a Magnaflow crossflow 3"/3". That's what I've got on one of my thirdgens and it sounds and performs very well.

 

Yep, that's why I bought the Magnaflow 3.5/3.5 for my Mufflex 3.50" exhaust system. When ordering the Mufflex system recently I only had the two choices of Flowmaster or Spintech.

Went with the Spintech because I thought it was a step above the Flowmaster powerwise. I just learned that Magnaflow came out with a 3.50"x 3.50" muffler that will work. I now have one on order.

Mufflex is a Magnaflow dealer and I bet you can now order the system with a Magnaflow. Oh well.

 

read your post. my opinions are not personal, they are factual. power is power.
even you made a personal comment towards the end. noone ever said they didnt sound good, they just dont perform.
just an observation.

 

i posted this clip a while back, their is some fact.

https://www.thirdgen.org/techbb2/sho...light=spintech

 

Stage20,

I wasn't even responding to what you wrote, I was writing to the author of this thread. I put my personal opinion in my response on purpose. I was saying that everyone has their opinions on what sounds good and what makes the most power. I've heard countless times that, "Flowmaster sounds good, but doesn't make much power," then someone else will write how they dyno'd better with a Flowmaster than some other brand name, then someone will dispute that and so on and so on...no need to get fired up.

 

not fired up at all. like i said, just an observation.
ive never seen where removing any muffler would increase HP with a slowdisaster.... maybe a stock, or some cheap turbo style muffler, LOL

if ya like the sound, and arent concerend with dyno #'s, or track times..... flowmasters are GREAT for cruising and making your ride sound good. cant argue with that.
take it easy.

 

1) Flowmasters sound like junk! They rumble good at low rpms but after that they sound like crap!
2)Flowmasters are chambered mufflers that seriously restrict exhaust flow and power! (hardly better than stock)
3)They get extremely hot killing even more power!
4)They do extensive advertising convincing you people they are good.(They are not)
If you want a real exhaust get the 3 inch dynomax intermediate pipe with a bullet and one tail. This setup will out perform ANY expensive cat-back kit on the market and sound better too at only a fraction of the cost!
The only upgrade on this is going to a 3.5 or 4 inch. or long tubes, but thats another story! Get mufflers out of your heads. Bullets are the only wat to go!

 

^ Listen to this guy. He knows what he is talking about... Those damn flowmasters get too hot!

 

The reason they get so hot is because of the chambers. The exhaust is trapped in there for too long and takes so long to exit. Look at a flowmaster thats been on a car for a while, it actually starts to go a bronze like colour. I mean, if these things get any hotter they might start to glow! LOL! As for spintech, they produce way more HP. All kinds of race cars are running spins now. I talked to a tech in CALI and he said he can't even sell flowmasters any more because the word is out. Everybody wants spintech. He says the cars perform way better with them compared to flows. This all being said, nothing can compare to a bullet. Bullets perform better, sound better and are WAY cheaper!
I'm not trying to sound like a cool guy or anything but mufflers are restrictive and a waste of money.

 

Hmm, well I guess my "jokemaster" system should be falling apart now that it has been on for 2 years...my whole system is still shiney aluminun including the muffler. No bronze color, no rust, nothing. Besides, I have an L03, what is 20-30 more CFM gonna matter? I like the 3" stainless tips, the easy bolt-on two-piece over-the-axle pipe, and I LOVE the Flowmaster sound. Mine sounds great at low rpms, and screams at high rpms...I don't know what some of you people think sounds good, but the only jokes I see are all your "thoughtfull" names for Flowmaster.

 

I'm not trying to hack on anybody but the word is out on flowmaster. All they are good at is making noise, not power. And they are not even good at that! If anybody insists on a muffler a dynomax ultraflow is way better! Just look at the inside diagrams of the flowmaster mufflers at thier site and you'll see what I'm talking about. A performance muffler that makes it hard for exhaust to escape? I rest my case. Hitler said if you tell a lie for long enough people will believe it, and that is the case with flowmaster via their extensive advertising!

 

A chambered flowmaster on a stock thirdgen is NOT going to kill horsepower. These are not 400 hp cars we are dealing with here. Your not going to see huge gains switching from chambered system to chambered system.

I do realize a chambered system vs a straight through system (bullet muffler) is not going to flow as well but:

1) Some people like the look of dual outlets.
2) I actually love the sound of my flowmaster, and it sounds the best IMO at 3k +
3) A lot of people cannot run no muffler and not get hassled by the cops.
4) You really can't say "flowmaster" because they make MANY mufflers, some flowing better than others.

 

I'm not one for cosmetics, its all about function. If you guys want to have fake dual exhaust go ahead but the best flowing systems are one tail like on the early LS1 WS6's and SS's. Your flowmaster sounds good because you have no cat. My point is bolted on a stock car they sound whiny at high rpm. Every Import car has a big wing, custum gages and big "dual" exhaust pipes. But when the guy hits the gas the car hardly moves! I let these guys get a long hard look at my "single" exhaust pipe! LOL! That is if they are not too far back to see it haha!

 

lets not get the dynomax bullets compared with the oval race mufflers.
the oval mufflers are much more quiet... as is the can mufflers they have.

just to clear things up. i can see a guy putting a bullet on his car and then sceaming at everyone for recommending dynomax....

 

Just got an e-mail from Denny at Mufflex. He said that the Magnaflow is a $40.00 option. It needs to be modified by the customer to work. They put a hanger in the box, and you must weld it up, so it will hang the tailpipe correctly. I think I am going with this option. Time to get rid of the restrictive 3" system. Everyone I spoke to that had done the same upgrade I want to do, said they picked up at least 4 tenths!

 

I just wish it had been available when I placed my order. I would have paid the extra $40 in a heartbeat for the Magnaflow muffler. Good luck with your Mufflex system. Allen

 

i dont see picking up 4 tenths from 3" to 3.5", and/or a flowmaster/spintech.... to a magnaflow.

 

I have a 436 with Hooker Supercomps, channeling into a 3" Flowmaster catback. I guess everyone I talked to lied to me. BTW, my friend that I race with, did indeed pick up 4 tenths, and this I know as fact, as I witnessed it. And he has a 383.

 

maybe not lied, just overexagerated.
lets shoot on the high side of things to be safe.
the muffler will more than likely give you 15hp or so, the larger pipe maybe 10.... and a lil bit of torque too.

so say 25hp.... and we will just even the torque out at 25pf ft.

how much ET will you pick up with a 25hp increase? not 4 tenths.
MAYBE 2. not saying im right, or you are wrong, but it seems logical.

good luck. i hope you do pick up a good bit. never hurts to be faster.

 

Oh, I forgot to mention, I'm going from a 3" to a 4".

 

Thats my fault, I forgot the thread was about a 3.5 system. I was talking a 4". My friend went to a 4" also. Sorry.

 

im sure you are putting down a good bit of power with that stroker, 4" will help greatly.
when i swapped from my shorty's and 3" flowmaster catback, to hooker long tubes, 3" y and a 4" mufflex, i picked up 4 tenths, but that was with a roller cam swap as well. (385 ci)

cam wasnt much biggger than what i already had, just the opportuninty to swap to roller for cheap, i couldnt pass it up.
post up your new times with the exhaust.

 

anyone know the weight of the Flowmaster 80 series?

im going to buy an SLP loud mouth resonator.. the newer kind with the perforated core.. i think that damn flowbastard i have is heat soaking the hell out of my gas tank..

 

I'd probably say 15lbs maybe less. I have one in my garage collecting dust. Anybody want one for free???