View Poll Results: Flowmaster restricts more than stock muffler?
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Flowmaster Restricts more than stock?
This is a discussion on Flowmaster Restricts more than stock? within the External Engine forums, part of the LSx Technical Help Section category; i have a 3'' catback flowmaster setup on my 87 ls1 and it still pulls the front tires , a ...
07-04-2008, 02:51 AM #141
i have a 3'' catback flowmaster setup on my 87 ls1 and it still pulls the front tires , a flowmaster exhaust wont do much for stock but once you start bumping up the power thats when they really shine
07-28-2008, 12:42 PM #142
I think what needs to happen is a real comparison test. I would do it but I have an LT1, and I know the LS1 is the more popular car right so it would make more sense to do it on an LS1 car. It would be nice if 3 mufflers could be tested; a Flowmaster 2 or 3-chamber, a Magna-Flow and maybe a Hooker Aero-Chamber, all in the same day on the same dyno, to see if the Flowmaster muffs really are restrictive or if it's just an illusion we are having.
07-28-2008, 06:14 PM #143
I have Flowmaster 1 chambers and I'd be willing to meet somewhere reasonable to do this comparison.....Put it to bed once and for all lol
Well, kind of...each motor/car is different, so #'s would vary a little bit. You'd have to do it all on 1 car for best results, but this way would be much easier and cost effecient.
Last edited by 01ws6er; 07-28-2008 at 06:17 PM.
07-28-2008, 06:48 PM #144
07-28-2008, 08:04 PM #145
07-28-2008, 08:30 PM #146
07-29-2008, 05:13 AM #147
07-29-2008, 09:22 AM #148
07-29-2008, 04:44 PM #149
I didn't bother to post them. I can't simply attatch pictures like I used to do here, that feature is long gone. And I'm not going to join another site just to link pics on this site. Seems like double duty for little gain.
Guess I could sit here and type out all the dyno numbers, ET and MPH from countless dragstrip passes etc....but I figure whats the point,,,this is just the internet afterall....so I simply summed it up to save others the time, money and aggrivation. Post #31 summed it up in a nutshell without going into all the little details. That entire process took the better part of 3 months of testing to make that all come together.
Started out just looking for ways to make the car go faster, and then we got this stupid idea and it took off from there.
07-29-2008, 05:01 PM #150
07-29-2008, 05:10 PM #151
Now comparing single systems to dual systems is comparing apples to oranges. I kept our tests as consistent as possible and never strayed from the single catbacks.
Thats not to say I wouldn't have minded testing a dual system,,,but thats an entirely different ballgame....
Actually the Bassani looked nice,,,but we couldn't find one to borrow and quite frankly they are a little pricey to just purchase for a test.
I would have loved to see how that compared to the 4 inch mufflex,,,,that single catback system blew the others single systems away.
07-29-2008, 05:18 PM #152
07-29-2008, 05:42 PM #153
Then if you fabbed your own shorty dual system with turndowns at the rear,,,it would probably be with crush bends, since most shops don't have a $30,000 mandrel,,,,so this again changes things....
We stayed with exhaust kits simply because they are all mandrel and they are considered simple bolt ons that people go for...
If it makes you feel better, I have done alot of dual system testing on my chevelle over the last 25 years in the quest for quicker ET's, and I ended up going back to flowmaster super 40's on that car,,,they performed just as well as the 10 other brands of mufflers I had on this car.
I found the best combo for this car was 3 1/2 pipe off the collectors into a custom Dr. Gas X pipe that switches to 3 inch on the other end,,,then 3 inch into the super 40's and a pair of Torque Tech tailpipes,,,,all mandrell bent.
It really came down to the pipe design and overall system that gave me best results on this car.
07-29-2008, 05:53 PM #154
07-29-2008, 06:19 PM #155
07-29-2008, 07:03 PM #156
07-30-2008, 04:12 AM #157
Funny though, we never did this for a flowmaster test,,,,I never knew so much hype over a muffler on the internet was a big deal. We simply did this for ourselves with no particular muffler in mind...
As far as a real dual system goes,,,,I'm willing to bet that if it's designed right, with a good X-pipe, the right pipe size etc....it would be hard to beat.
These 4th gens are so limited with floor space you have to be willing to sacrafice alot of ground clearance to run something worth having, I'm just not willing to do that on my 4th gens.
Thats why the Bassani system was appealing to us. Nice fit and finish, but it limits itself to a transverse muffler much like the older true dual systems of the 1st and 2nd gen F-bodies,,,for obvious reasons,,simply because thats what the car was designed to accept. Would be even a different comparison yet if you used a dual muffler setup,,,sheeeesh the combinations are endless.
I've had several dual systems on my chevelle over the years, with different pipe sizes, H-pipes and X pipes, several mufflers as well. Of course this is a dual muffler application. I have an exhaust setup now that works so well that opening the headers only yields very slight gains on a 600+ HP combo.
Guess I could fab a single system for the car,,,but I would guarantee the car would slow down,,,besides I don't think I could bring myself to do such a thing to this car
07-30-2008, 04:58 AM #158
- Join Date
- Jul 2008
- bryan texas
- 2000trans am
A cutout eliminates all these issues!!!!!!!!!!!!
07-30-2008, 09:11 AM #159
07-30-2008, 01:02 PM #160
My chevelle is a perfect example of this. Can't really drive around all the time with those open anyway without fear of the man. I can't anyway. They are more for making some extra noise when the oportunity presents itself in my case.
Just to add something interesting on this particular car. I can cruise along with the wideband hooked up,,,,watching the AFR while running through the full exhaust,,,,then flip the switch for the dual 3 1/2 inch cutouts and the AFR only changes 1/10th which I found interesting,,,,the full exhaust system is doing a good job on a rather large cube motor.
Last edited by Firebirdjones; 07-30-2008 at 01:10 PM.
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