I have a V6 3.L in my 90 Firebird at the moument. I recently intsalled a Dynaflow muffler and I'm not totally happy with the sound it creates. I have now (2) 2 1/2" exhaust ports. and my question is...

Someone suggested that I take it off replace it with a Flowmaster muffler and have (1) 2" exhuast port, that would increase hp and I'd get a better sound out of it. <------ Would this truely work?

Now my 2nd question is how will a V6 sound with glasspacks?

I do plan to replace the V6 with a 305 but thats atleast another yr away. Any suggestions you guys can offer is greatly apprciated.

 

if you plan changing the engine then dont waste your money on exhaust you cant reuse the V6 exhaust

 

Like I said its atleast a yr away, and I'm mainly concerned about the sound now.

 

do yourself a favor and spend the extra 100 bucks or so on a 350

 

Why would you go through the trouble to swap in a 305..

 

Wow. You guys are really concentrated on the topic at hand...

I've never heard flows on a v6 but I have heard plenty of glaspacks and they all sounds like crap to me. IMHO...

 

Well when I bought my V8 i was told it was a 350 and my ignorance never told me to check the casting numbers to be sure. So I was stuck with a 305. I could get a 350 now but i have decided I want to experiment with this engine for maybe a half a year then when I feel comfortable get a 383 working and replace the old T-5. So the answer to your question is, its a curse. sometimes you just get stuck with a curse, ahem... i mean 305

 

You should have 2 exhaust pipes coming from the muffler, this was the standard configuration you are more flow with two 2 1/2 outlets than one 2" outlet. I think some had two coming from one side and the others were on both sides. The only cars that had one were the 4 cyl ones, and them I'm not too sure about that. Keep the exhaust you have on the car and save the money, if it's 2 1/2 exhaust it will work fine with a V8 in the car.

 

the guy above me made no sense wat so ever but hes my two abes...


i have flow 40s and they sound awsome albeit on a 305. i have 2.5" true duals to 3' tips and i love the sound...


IMHO glasspacks sound like ***.. if you like that sound then save ur self $30 and just run no muffler at all

 

Well, from what it sounded like he was saying was when he had the new muffler put on, he now has 2 2 1/2 pipes, I may have been confused but was saying this was right, it's what he should have, one inlet, two outlets. He would be better off keeping the two 2 1/2 outlets instead of going with one 2" outlet

 

ok i get wat u are saying but you are mistaken... the only f-body to come with the dual outlet crossflow muffler to the best of my knowledge is the V8 i have never seen a v6 with dual pipes unless they are after market.....


now as for the HP increase.... you wil prolly lose some peak hp going to smaller outlet but gain in torque, that is if you dont go too small.... since the stock pip diameter is already 2.25" i think.... you should stay at that size or larger....

plus dual tips looks better

 

Mine was dual opposite outlets from the factory.

 

As was mine one on each side of the muffler, and one year Camaro had both outlets on one side.

 

Same here.

 

wow well here in FL there arent an abundant amount of thirdgens around here but i know my friends has dual pipes on one side, and ive seen more than a few with single pipe out one side, including a 91 RS 305 5speed

 

Probably all have been replaced at one point.
As far as I know (which isn't all that far to start with... )...

The only factorysingle outlet exhaust f-bodys were the iron dukers.

SLP is the only 'dual' out one side sytem that comes to mind offhand... obviously, not stock though.

Flowmaster on a v6 sounds pretty good.. if plan to idle around everywhere you drive.

Sound is a personal taste though... some people like nails on a chalkboard ....

 

To give my opion on the question, a flowmaster sounds better than a glasspack on a v6. Might get mistaken for a V8, least my buddies 95 v6 could hehe. As far as you gaining HP from doing this i doubt it. With the flowmaster you might see a small loss, with the glasspack you might see a small gain, talking maybe 1-2 HP. I have had a flowmaster on a V6 S10 and i loved the way it sounded, and i have heard V6 S10s with a glasspack that sounded like butt. I would do some searching for threads with sound clips, might help. Most will probably be on V8 cars but you should get the idea.

 

my friend has a glass pack on his 94 v6 witch is the 3.4l and it sounds good at low rpms and at idel but i hate the sound at like 3 grand up. dont know of that helps you at all. haha his car sounds mean at lights. can easily be mistaken for a v8

 

**Update**

I got my Flowmaster 80 series installed today. My cat had been gutted for awhile and I asked him to cut it out and place a straight pipe there. Well Its alot louder, sounds really awsome at idle. However I'm not to impressed with it at hwy speeds. I'm thinking on having the Cat reinstalled.
My wife says it sounds perfect... although she liked the Dynoflow too.

Any suggestions guys?

Also the guy charged me $160 bones to do all that. I figured thats a good deal.

Thanks in advance

 

dont b so sure u want all that hiway noise.. my 40s are awsome sounding all the time but at the end of a long drive i tend to have a ringing in my ears from the silence which tells me that there is alotta noise around me....

 

the muffle might get loudr after a little will some take a few weeks to break in just my small experience, so it might get to where you want, these were all crap mufflers my friend has bought before he switched to flowmaster. i forgot to ask him if it happened again ill get back to you

 

Well just got the cat installed, Idle still sounds ok, although its somewhat less of a rumble. Very acceptabel tho.

And as far as hwy speeds, sounds great. So yeah Series 80 Flowmaster is a good muffler

 

cause gas is expensive maybe....

 

a 305 is a big leap from a V6 lol.

And 305s can be peppy if you give them a good cam and port out the heads a bit.