LSX M3 exhaust suggestions?: question 2, thermal shielding
04-04-2009 | 11:37 AM
#1
LSX M3 exhaust suggestions?: question 2, thermal shielding I am finally about to get back to work on my project.
98' M3 with LS1 - street/road course car
Looking for peeps input/experience
I'm looking at exhaust options.
I really want to run an x-pipe with dual mufflers.
Space is a bit of a concern b/c I want to run it down the stock exhaust channel and exit in the stock location.
My plans so far 3" SS pipes with X and dual mufflers. Looking for opinions on what sounds the best. So far I think the spintechs and Borla XR1's sound pretty good. Would really like muffler to be SS construction but that limits my choices.
Second options is to run a single X flo muffler. I can't really find any sound clips for these and I'm not sure if there is any other advantage to it other than space/price (only one to buy)
Some may say the 3" duals are overkill, but I'm keeping future upgrades in mind. Currently the cars is expected to may lower 400's rwhp.
Secondly, I'm looking for thermal sleeving to shield brake lines and fuel line from headers/exhaust. The flexible braided brake line are less than an inch in from the headers in some places. Any suggest a good brand of thermal sleeving? There are a bunch out there I know.
98' M3 with LS1 - street/road course car
Looking for peeps input/experience
I'm looking at exhaust options.
I really want to run an x-pipe with dual mufflers.
Space is a bit of a concern b/c I want to run it down the stock exhaust channel and exit in the stock location.
My plans so far 3" SS pipes with X and dual mufflers. Looking for opinions on what sounds the best. So far I think the spintechs and Borla XR1's sound pretty good. Would really like muffler to be SS construction but that limits my choices.
Second options is to run a single X flo muffler. I can't really find any sound clips for these and I'm not sure if there is any other advantage to it other than space/price (only one to buy)
Some may say the 3" duals are overkill, but I'm keeping future upgrades in mind. Currently the cars is expected to may lower 400's rwhp.
Secondly, I'm looking for thermal sleeving to shield brake lines and fuel line from headers/exhaust. The flexible braided brake line are less than an inch in from the headers in some places. Any suggest a good brand of thermal sleeving? There are a bunch out there I know.
04-04-2009 | 01:35 PM
#2
Good luck getting dual 3" pipes to fit. I used all stainless on mine and it has held up well. I have 3" pipes through 3" dual cats then to dual 2.5" pipes with an h-pipe. The pipes are next to each other back to a single Magnaflow dual 2.5" in and out muffler in basically the stock location. I originally wanted to use dual 3" all of the way, but it just wasn't going to fit.
I have sleving on the fuel line as it comes into the engine bay and have had no problems in 8000+ miles in all conditions and using the ac during the summer. For a true road race car you would need to do more, but not for a street car.
I have sleving on the fuel line as it comes into the engine bay and have had no problems in 8000+ miles in all conditions and using the ac during the summer. For a true road race car you would need to do more, but not for a street car.
04-06-2009 | 11:10 PM
#3
Yea, I was thinking the same thing about the space. You are probably right, I need to have another close look at it. Duals all the way will be heavier too, not really what I want.
12-05-2009 | 10:35 AM
#4
Bringing this post back up b/c I'm planning on making changes to the exhaust.
Right now I have 3" pipes into an X out 3" then stepping down to 2.5" which goes into a 2 in 2 out Spintech Sportsman XL muffler. The muffler measures 16"x10"x3.5".
It's too freaking loud. Great for the track, no so great for driving around town.
I'm trying to find mufflers to fit in place of the Spintech. I'm looking at 4", 5", and 6" inch round mufflers from Magnaflow and Dynomax. I hope that two of them will be quieter than the one Spintech and flow better.
Right now I have 3" pipes into an X out 3" then stepping down to 2.5" which goes into a 2 in 2 out Spintech Sportsman XL muffler. The muffler measures 16"x10"x3.5".
It's too freaking loud. Great for the track, no so great for driving around town.
I'm trying to find mufflers to fit in place of the Spintech. I'm looking at 4", 5", and 6" inch round mufflers from Magnaflow and Dynomax. I hope that two of them will be quieter than the one Spintech and flow better.
12-05-2009 | 04:04 PM
#5
Here's a test someone did a test with different mufflers on a Mustang on a chassis dyno.
The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq
Sound Off in Quietest to Loudest (Decibels):
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq
Sound Off in Quietest to Loudest (Decibels):
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
I am happy with how quiet the the XS is
12-08-2009 | 07:24 AM
#6
