Flowtech Mufflers
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Thread Starter
Teching In
Joined: Jun 2006
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From: Perth, Australia
Flowtech Mufflers Hey guys, i'm about to have some Flowtech Warlock series mufflers shipped over from the US (Im in Australia). Just wondering if anyone has used them before, and if so how loud are they when capped, ie would i still require an additional muffler before the tailpipe if i wanted it "relatively" quiet? Its going onto a Holden 355ci stroker, was way too loud with my original single magnaflow muffler for street use - looking at running a twin 3" with twin warlocks (straight through section dumped at diff). Sorry for bothering you fellas so far away, but these mufflers are pretty much unheard of down under.
Cheers
Cheers
Thread Starter
Teching In
Joined: Jun 2006
Posts: 7
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From: Perth, Australia
oh ok, just googled that. "jegs" as in the parts supplier. Sorry i've only ever dealt with summit racing when importing parts from the US. Summit stock them, so i don't really need any info regarding that, jegs doesnt seem to mention anything about international orders anyway? They're made by Flowcraft, a Holley brand. Just wondering if any has heard them running on a car before.
or even if someone could point me to another US performance based forum that might be able to help? You guys are the only one i currently visit.
or even if someone could point me to another US performance based forum that might be able to help? You guys are the only one i currently visit.
They sound just like a regular turbo muffler when capped and when they are uncapped the are just a touch louder than a straight thru welded case style muffler like the dynomax ultra flows. A pretty good chioce but they are kinda bulky if I remember correctly.
My dad put those mufflers on an old Chevy truck that we are restoring...it has a 454 in it with mufflers right off l/t headers. When open they are loud as hell, but once you cap them it is a lot quieter.
Last edited by LoneStarPerformance; Jul 6, 2006 at 02:10 PM.
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!LS1 11 Second Club
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From: Miami
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).
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).
Old comparo from a mustang test.
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Teching In
Joined: Jun 2006
Posts: 7
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From: Perth, Australia
thanks heaps for that SouthFL ! How loud were they uncapped tho ? As im guessing the result posted was capped.
ive heard a few reports saying they rust apart pretty quickly, but surely it would just be the same as any other steel muffler?
tossing up between using the warlocks, or just magnaflow straight thru with some cut-outs welded afterwards.
ive heard a few reports saying they rust apart pretty quickly, but surely it would just be the same as any other steel muffler?
tossing up between using the warlocks, or just magnaflow straight thru with some cut-outs welded afterwards.
We put a warlock on my neighbor's escalade when we installed the turbo kit. Obviously the turbo quiets the exhaust a lot, but with the cutout closed, the sound isn't much louder than the stock escalade exhaust at idle. At WOT, it is still not loud, but has a nice tone. Oddly enough, with the cutout open it still isn't nearly as loud as the straight downpipe.
Thread Starter
Teching In
Joined: Jun 2006
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From: Perth, Australia
stupid question, but i was planning on running electric cut-outs instead of the block-off plate on the warlocks, so i could open/close them from inside the car - but in the pictures it looks like it has some kind of cap and sinks into the muffler, will this still work ok if its replaced by the electric cut-out ?
!LS1 11 Second Club
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From: Miami
Originally Posted by [NVIOUS]
stupid question, but i was planning on running electric cut-outs instead of the block-off plate on the warlocks, so i could open/close them from inside the car - but in the pictures it looks like it has some kind of cap and sinks into the muffler, will this still work ok if its replaced by the electric cut-out ?
Looks to me like a qtp butterfly valve will bolt right up to it.
I know that Barry at QTP was experimenting with the Warlock mufflers over a year ago. You might want to contact him.
Thread Starter
Teching In
Joined: Jun 2006
Posts: 7
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From: Perth, Australia
Yeh the flange looks like it wont be a problem, but if you look at the pic it looks like there's a part (Flow Intensifier) on the back of the block-off plate that helps bypass air through the muffler when closed. And if you replaced this plate with a electric cut-out it might have a problem directing exhaust gasses through the muffler when closed, as the "flow intensifier" will not be there ?
If so then i might just have to run a straight thru muffler with an additional cut-out piece welded on afterwards.
If so then i might just have to run a straight thru muffler with an additional cut-out piece welded on afterwards.
!LS1 11 Second Club
Joined: Apr 2003
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From: Miami
Ah, yes, that insert does look like it's slashed to one side to help divert airflow when the cutout is closed. I wonder if it's a crucial part of the design. Again, Barry may be able to answer that for you. He may have done some testing.
With the cutout closed the flow will not be any different than with the block off plate on there.edit: the flow intensifier may not be hollow. The flange may only be there to bolt up the F.I . I f that is the case just cut the end of it off and it will work fine. Sure it won't " divert the air " but it really doesn't have to. With the cutout closed the air in that small space will stagnate and in effect divert the rest of the exhaust gas.
my understanding with exhaust is that it is always going to take the path of least resistance, so if you have an electric cut out bolted on the end and close the butterfly, the gases will still pass through the muffler. they will probably just fill the void and then continue on through the muffler. im not sure if that F. I. is actually functional or not...the only benefit that i can see is redirecting the moisture through the muffler and on out the back rather than allowing it to accumulate in the void eventually causing a premature rust out