Question about flowmaster - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-03-2004, 12:34 PM   #21
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A while ago I was asking about Flowmaster. Now I really dought that I will be getting on. I will stick with what I have now.
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Old 02-03-2004, 04:35 PM   #22
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I think the biggest problem would be a Flowmaster on a Supercharged car. I doubt it would hurt performance (and it would definitely be better than stock) on an L27 or L36. The SC models flow a ton more, and you have to move that crap out in a hurry. Anyone buy my theory?
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Old 02-03-2004, 06:37 PM   #23
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hey mnbc........lets get the sounds clips back up.

some people might care about sound rather than a little less/more air flow.


Heres what i've heard:
1995 SSEi - 3" tubing, no cat, no res, magnaflow muff
1994 SSE - gutted cat, dynomax muff
1994 SLE - stock cat, stock res, flowmaster muff

I'd still back my flowmaster 110%
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Old 02-03-2004, 07:59 PM   #24
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Here'* some clips! Right Click save as!!

Smellbird 1998 SLE (L36, resonator) Stock exhaust, what 95%+ here have.

http://www.fearthepearl.com/vids/smellbird.mpg

BonneMeMn. 1993 SLE (L27, no res, High Flow N10 Muffler) Special option till 93...

http://www.fearthepearl.com/vids/bonneme.avi

Allmachtige 1994 SSE (L27, resonator, Dynomax muffler)

http://www.fearthepearl.com/vids/allmachtige.mpg

zzzzzeke 1994 SLE (L27, Resonator, Flowmaster 80 series)

http://www.fearthepearl.com/vids/zeke.mpg

Crazydriver868 1992 SSEi (L67, no resonator, Flowmaster 80 series)

http://www.fearthepearl.com/vids/crazydriver.mpg

Willwren 1993 SSEi (L67, res i think, hi flow cat, modded engine, magnaflow)

http://www.fearthepearl.com/vids/footwork.mpeg

SSEi95'* 1995 SSEi (L67, no res, 3" pipe, modded engine, magnaflow)

http://www.fearthepearl.com/vids/ssei95.mpg
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Old 02-03-2004, 08:54 PM   #25
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Those sound clips are nice. Leave um up!!!
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Old 02-03-2004, 09:08 PM   #26
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These can also be found @ www.bonneville.fearthepearl.com along with an always growing list of other things.
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Old 02-03-2004, 09:40 PM   #27
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No resonator on my 93. 94 was the first year for that. Mine is high-flow cat, no resonator, Magnaflow.

Thanks Jason. That'* a huge help. More techinfo work.....I'll post a general exhaust article with links to those clips, if there are no objections.
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Old 02-03-2004, 10:10 PM   #28
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Ok I guess I should start with your first question then move on to explaining the obvious to you, which you don't seem to be grasping. No, I haven't heard a FlowMaster on a Bonneville, nor does that really matter to what I posted which brings me to the obvious portion of this post. What I pasted was directly from people who spend more time dyno'ing than you do rambling about "Screw horsepower, lets make noise!". I didn't create those numbers and the only opinion that accompanied them was me saying "flowmaster sucks" and variations there of. I like a good sounding exhaust too, I also like center positioned ram air hoods but I'd rather have performance than looks or sound. To each their own and if its the sound you're after or the neon lights you want or the huge carbon fiber spoiler you think looks "tight" go for it. Oh and I think its interesting you had a comment about a post you aparently didn't look at very well. "if one has slightly more backpressure it'll make more torque and less HP, and vice versa" so how about looking at the numbers? Magnaflow 372.8 / 332.5 tq = More flow. Flowmaster 369.4 hp / 331.8 tq = Less flow. Where in your scientific calculations did you come up with more pressure = more torque? Maybe that would explain why when my catalytic coverter begins to clog my torque goes through the roof....or not.
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Old 02-03-2004, 10:47 PM   #29
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If you open up an exhaust toooo much, you lose torque because of a lack of backpressure. I'm sure it'* insurmountable.

I just didn't like the flowmaster sux part Carry on fellow jason that drives a bonnie!
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Old 02-03-2004, 11:11 PM   #30
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You're sure its very difficult to overcome? hehe I'll take it as a typo. But yeah I have heard people talking about a seeming loss of power from putting too large an exhaust on their car. As I said in one of the many posts I did, horsepower and torque doesn't seem to be affected all too much. It seems for the most part you won't notice a "seat of your pants" difference from one to the other so it really comes out to preference. I had a flowmaster system on an old T-Bird 5.0 I had years ago and I was happy with it all around but it seems as far as performance goes its at the bottom.
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