3" or 3�" borla or magnaflow mufflers blown smallblock

Posted By: 1Fast340

3" or 3�" borla or magnaflow mufflers blown smallblock - 09/02/10 05:53 PM

what size exhaust would be enough for a twinscrewblown 340 at about 14pounds of boost ? small solidroller 242/248@.050 .570/.576 lift ported edelbrock heads and 1 7/8" primary headers on ethanol

3" or 3�"

borla or magnaflow? i want straight thru but not sure if the packing in the magnaflows will survive the heat for very loong since this thing will be driven to the track and back and to local cruisenights alot

looking at either the 18"body magnflows or 16" body borla mufflers

i realize this wont be a quiet car by any means but trying to keep it at a level wich is tolerable

any sugestions ?

also im not made out of money for some odd reason but i dont mind spending the extra money if the quality diferens is there to justify it

thanks

Posted By: bigsbigelow

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/02/10 06:04 PM

I would go 3.5" Magnaflow with an X-pipe (If 3.5" pipe will fit). I have never disliked the way a car sounds with Mangaflow mufflers. The X-pipe will aid in taming the exhaust note as well as help flow.

Posted By: MR_P_BODY

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/02/10 06:12 PM

What size is the collector and how many revs do you turn

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/02/10 06:17 PM

collectors are 3" but will cut them of and weld on some 3�" collectors if it would make a diference in power that is noticeable

engine is still waiting to be finnished but i think this thing may peak around 7-7500rpms same combo as NA motor realy liked being shifted at alitle over 7000rpms while my thinking is that the blower will shift the powerband even higher since it should take away any limitation the heads are to the rpm.

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/02/10 06:21 PM

and i dont see a problem with making 3�" tubing fit the car,if anything is in the way i will make it work anyway i dont mind massaging the car alitle when it makes a diference

Posted By: mshred

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 12:15 AM

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

Posted By: gsmopar

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 02:53 AM

Quote:

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

I can't say the magnaflows are quiet. Heck, my 2 chamber flowmasters were about the same.

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 09:19 PM

Quote:

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

yep but you have the shortest ones from what i remember another 4" of mufflerbody should help some in that department, i have heard your car from youtube and it sound real good

and not that picky on being quiet just want it somewhat tolerable

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 09:20 PM

Quote:

What size is the collector and how many revs do you turn

Quote:

collectors are 3" but will cut them of and weld on some 3�" collectors if it would make a diference in power that is noticeable engine is still waiting to be finnished but i think this thing may peak around 7-7500rpms same combo as NA motor realy liked being shifted at alitle over 7000rpms while my thinking is that the blower will shift the powerband even higher since it should take away any limitation the heads are to the rpm.

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 09:23 PM

Quote:

Quote:

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

I can't say the magnaflows are quiet. Heck, my 2 chamber flowmasters were about the same.

thats some nice work

what brand is that x-pipe? im not all that in love with the x-pipe sound but power and streetability in the same package is nice

also i will probably have my exhaust go all the way out the back with some turndowns just sticking out under the bumper and from the experience i have with exhaust i have learnt that pipes all the way out behind the car helps alot with soundlevels

Posted By: mshred

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/03/10 11:37 PM

Quote:

Quote:

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

yep but you have the shortest ones from what i remember another 4" of mufflerbody should help some in that department, i have heard your car from youtube and it sound real good
and not that picky on being quiet just want it somewhat tolerable

true, i do have the smallest one because i wanted the loudest sound lol...the clips i have on youtube are actually very quiet compared to it in person...they are loud! all i know is that gauging from what i have heard many say, the magnaflows will be the quieter of the two in general, while still sounding good and delivering awesome power...but man, i love how my borla's sound, i can just imagine them on your setup

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/04/10 02:00 PM

Quote:

Quote:

Quote:

if you want quiet go with the magnaflows...my 3 inch xr-1's on a mild 340 with an x pipe are anything but quiet

yep but you have the shortest ones from what i remember another 4" of mufflerbody should help some in that department, i have heard your car from youtube and it sound real good
and not that picky on being quiet just want it somewhat tolerable

true, i do have the smallest one because i wanted the loudest sound lol...the clips i have on youtube are actually very quiet compared to it in person...they are loud! all i know is that gauging from what i have heard many say, the magnaflows will be the quieter of the two in general, while still sounding good and delivering awesome power...but man, i love how my borla's sound, i can just imagine them on your setup

now you make me feel old i used to realy like loud:p now i prefer it �litle more melow unless it will cost me power

its a shame it seems like the borla mufflers are so much louder,when i realy like the quality of borla compared to magnaflow,wich isnt realy bad but still diferent levels so to speak..
yeah i think they would sound bada$$ on my build wich i think will be just alitle wilder than yours but not all that much

Posted By: gsmopar

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 09/04/10 04:52 PM

Quote:

thats some nice work what brand is that x-pipe? im not all that in love with the x-pipe sound but power and streetability in the same package is nice

also i will probably have my exhaust go all the way out the back with some turndowns just sticking out under the bumper and from the experience i have with exhaust i have learnt that pipes all the way out behind the car helps alot with soundlevels

Thanks!

Pypes 3.5 in X-pipe kit and Magnaflow race mufflers.

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/17/10 05:05 PM

ok i have decided i dont care about if the borla mufflers are louder and i dont care they are more expensive than magnaflows since im putting enough money into this stuff everywhere so a few 100$ more on mufflers are not a big thing even if im not made out of money

any advice on whats the diference betwen the XR1 raceline multicore mufflers and the sportsman series? its a pretty good diference in price

looking at the 16" long body mufflers,i think i will use an X-Pipe even if i dont realy like the sound of the X and exhaust will end in front of the wheels or out the back of the car have not decided on that yet

Posted By: megajoltman

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/18/10 03:20 PM

Haven't installed mine yet but they were not too loud on my buddy's big block with 3 1/2 full exhaust.

There big mothers though

Posted By: Pat7272

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/18/10 04:10 PM

Quote:

Haven't installed mine yet but they were not too loud on my buddy's big block with 3 1/2 full exhaust.

There big mothers though

Are those the sportsman or multi-core?

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/18/10 05:47 PM

Quote:

Quote:

Haven't installed mine yet but they were not too loud on my buddy's big block with 3 1/2 full exhaust.

There big mothers though

Are those the sportsman or multi-core?

3�" not being loud

they must be good

Posted By: megajoltman

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/18/10 08:36 PM

Sportsman

Case Length (in) 16.000 in.
Overall Length (in) 19.000 in.
Thickness (in) 4.250 in.
Width (in) 7.850 in.

My daily driver is a 12V cummins 4x4 so my not too loud might be different then your not too loud

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/18/10 09:05 PM

Quote:

Sportsman

Case Length (in) 16.000 in.
Overall Length (in) 19.000 in.
Thickness (in) 4.250 in.
Width (in) 7.850 in.

My daily driver is a 12V cummins 4x4 so my not too loud might be different then your not too loud

hey its cheating to use one of those boostproducing mufflers in front of the regular muffler

Posted By: Cab_Burge

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/19/10 02:04 AM

I have a set of 3x14 Magnaflows on my N/A 518 C,I. low deck stroker street Duster that has ran 10:34 at 128.6 MPH through the muffs on Oregon pump gas, the muffs are mounted behind the rear end at the rear bumper. The further back you mount the mufflers the quieter it will be and not affect back pressure due to having more pipes behind the muffs

I do have a new set of the 14x3.5 stainless Magnaflow Ultra, they look just like the picture of the Sportmans Borla

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/19/10 05:06 PM

Quote:

I have a set of 3x14 Magnaflows on my N/A 518 C,I. low deck stroker street Duster that has ran 10:34 at 128.6 MPH through the muffs on Oregon pump gas, the muffs are mounted behind the rear end at the rear bumper. The further back you mount the mufflers the quieter it will be and not affect back pressure due to having more pipes behind the muffs I do have a new set of the 14x3.5 stainless Magnaflow Ultra, they look just like the picture of the Sportmans Borla

more pipes behind the muffs when they are at behind the rearaxle? i do know what you mean about having the mufflers further back it realy helps and having realtailpipes that dont dump under the car helps alot thats something alot of people forget about

what i like about the borla mufflers is that they are suposed to be slightly lighter wheight and that they are made out of real stainless as in 304 steel instead of the much cheaper 409 that magnaflow uses since the rest of the exhaust will be fabbed up out of 0.059" wall 304 SS steal (unless i find someone selling 3" 0.059wall titanium straight tubing for cheap,wich wont happen)
trying to save alitle weight here aswell the object with the car is to make it look alitle more like a sleeper while anything added or redone will be done with lighter stuff whenever i can aford it.
this is also alitle depending on if i do 3" or 3�" sad thing is that the bigger option will add weight and im not entirely sure i will make enought power to justify adding that wheight

Posted By: 1Fast340

Re: 3" or 3�" borla or magnaflow mufflers blown smallblock - 10/21/10 04:56 PM

i e-mailed Borla about this and they recomended the multicore mufflers for my application they said they would be quieter compared to the sportsmans and would give me good performance

just thought i would add that if enyone else finds this thread while doing reserch for borla

now i better start saving to be able to afford this